./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem11_label56.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_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/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_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem11_label56.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/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_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/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 77c0c06cf345be89a7bfdea692ab0197740d9f5ad98baaf39e02029ee2fea03a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:23:50,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:23:50,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:23:50,751 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:23:50,751 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:23:50,753 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:23:50,755 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:23:50,757 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:23:50,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:23:50,772 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:23:50,773 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:23:50,777 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:23:50,777 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:23:50,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:23:50,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:23:50,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:23:50,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:23:50,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:23:50,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:23:50,801 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:23:50,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:23:50,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:23:50,810 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:23:50,811 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:23:50,819 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:23:50,819 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:23:50,819 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:23:50,820 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:23:50,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:23:50,822 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:23:50,822 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:23:50,823 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:23:50,824 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:23:50,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:23:50,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:23:50,826 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:23:50,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:23:50,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:23:50,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:23:50,829 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:23:50,829 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:23:50,830 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:23:50,867 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:23:50,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:23:50,870 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:23:50,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:23:50,871 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:23:50,872 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:23:50,872 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:23:50,872 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:23:50,872 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:23:50,873 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:23:50,874 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:23:50,874 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:23:50,874 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:23:50,875 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:23:50,875 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:23:50,875 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:23:50,875 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:23:50,876 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:23:50,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:23:50,877 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:23:50,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:23:50,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:23:50,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:23:50,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:23:50,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:23:50,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:23:50,880 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:23:50,881 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:23:50,881 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:23:50,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:23:50,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:23:50,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:23:50,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:23:50,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:23:50,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:23:50,883 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:23:50,883 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:23:50,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:23:50,884 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:23:50,884 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:23:50,884 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:23:50,884 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_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 77c0c06cf345be89a7bfdea692ab0197740d9f5ad98baaf39e02029ee2fea03a [2021-11-23 17:23:51,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:23:51,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:23:51,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:23:51,209 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:23:51,210 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:23:51,212 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem11_label56.c [2021-11-23 17:23:51,289 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/data/6eaf2cd8d/35846cfb6bb5444fad397c04b9a90113/FLAG7d733cd67 [2021-11-23 17:23:51,981 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:23:51,982 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/sv-benchmarks/c/eca-rers2012/Problem11_label56.c [2021-11-23 17:23:51,995 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/data/6eaf2cd8d/35846cfb6bb5444fad397c04b9a90113/FLAG7d733cd67 [2021-11-23 17:23:52,202 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/data/6eaf2cd8d/35846cfb6bb5444fad397c04b9a90113 [2021-11-23 17:23:52,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:23:52,206 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:23:52,208 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:23:52,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:23:52,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:23:52,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:23:52" (1/1) ... [2021-11-23 17:23:52,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39f0618f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:52, skipping insertion in model container [2021-11-23 17:23:52,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:23:52" (1/1) ... [2021-11-23 17:23:52,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:23:52,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:23:52,586 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_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/sv-benchmarks/c/eca-rers2012/Problem11_label56.c[5994,6007] [2021-11-23 17:23:52,937 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:23:52,951 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:23:52,987 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_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/sv-benchmarks/c/eca-rers2012/Problem11_label56.c[5994,6007] [2021-11-23 17:23:53,106 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:23:53,121 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:23:53,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:53 WrapperNode [2021-11-23 17:23:53,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:23:53,123 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:23:53,123 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:23:53,123 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:23:53,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:53" (1/1) ... [2021-11-23 17:23:53,156 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:53" (1/1) ... [2021-11-23 17:23:53,266 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 999 [2021-11-23 17:23:53,267 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:23:53,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:23:53,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:23:53,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:23:53,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:53" (1/1) ... [2021-11-23 17:23:53,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:53" (1/1) ... [2021-11-23 17:23:53,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:53" (1/1) ... [2021-11-23 17:23:53,295 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:53" (1/1) ... [2021-11-23 17:23:53,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:53" (1/1) ... [2021-11-23 17:23:53,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:53" (1/1) ... [2021-11-23 17:23:53,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:53" (1/1) ... [2021-11-23 17:23:53,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:23:53,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:23:53,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:23:53,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:23:53,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:53" (1/1) ... [2021-11-23 17:23:53,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:23:53,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:23:53,448 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:23:53,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:23:53,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:23:53,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:23:53,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:23:53,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:23:53,568 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:23:53,570 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:23:55,251 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:23:55,302 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 17:23:55,308 INFO L158 Benchmark]: Toolchain (without parser) took 3099.14ms. Allocated memory was 151.0MB in the beginning and 220.2MB in the end (delta: 69.2MB). Free memory was 104.7MB in the beginning and 164.9MB in the end (delta: -60.2MB). Peak memory consumption was 84.5MB. Max. memory is 16.1GB. [2021-11-23 17:23:55,309 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 151.0MB. Free memory is still 124.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:23:55,310 INFO L158 Benchmark]: CACSL2BoogieTranslator took 913.85ms. Allocated memory is still 151.0MB. Free memory was 104.6MB in the beginning and 88.6MB in the end (delta: 15.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-23 17:23:55,312 INFO L158 Benchmark]: Boogie Procedure Inliner took 144.17ms. Allocated memory is still 151.0MB. Free memory was 88.6MB in the beginning and 71.4MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-23 17:23:55,313 INFO L158 Benchmark]: Boogie Preprocessor took 133.62ms. Allocated memory is still 151.0MB. Free memory was 71.4MB in the beginning and 62.2MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:23:55,314 INFO L158 Benchmark]: RCFGBuilder took 1902.45ms. Allocated memory was 151.0MB in the beginning and 220.2MB in the end (delta: 69.2MB). Free memory was 62.2MB in the beginning and 164.9MB in the end (delta: -102.7MB). Peak memory consumption was 45.9MB. Max. memory is 16.1GB. [2021-11-23 17:23:55,322 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 151.0MB. Free memory is still 124.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 913.85ms. Allocated memory is still 151.0MB. Free memory was 104.6MB in the beginning and 88.6MB in the end (delta: 15.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 144.17ms. Allocated memory is still 151.0MB. Free memory was 88.6MB in the beginning and 71.4MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Preprocessor took 133.62ms. Allocated memory is still 151.0MB. Free memory was 71.4MB in the beginning and 62.2MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 1902.45ms. Allocated memory was 151.0MB in the beginning and 220.2MB in the end (delta: 69.2MB). Free memory was 62.2MB in the beginning and 164.9MB in the end (delta: -102.7MB). Peak memory consumption was 45.9MB. 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 17:23:55,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/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_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem11_label56.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/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_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/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 77c0c06cf345be89a7bfdea692ab0197740d9f5ad98baaf39e02029ee2fea03a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:23:57,923 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:23:57,926 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:23:57,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:23:57,987 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:23:57,992 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:23:57,994 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:23:57,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:23:58,001 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:23:58,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:23:58,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:23:58,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:23:58,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:23:58,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:23:58,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:23:58,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:23:58,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:23:58,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:23:58,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:23:58,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:23:58,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:23:58,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:23:58,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:23:58,050 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:23:58,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:23:58,057 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:23:58,058 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:23:58,060 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:23:58,061 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:23:58,062 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:23:58,063 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:23:58,064 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:23:58,066 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:23:58,067 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:23:58,068 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:23:58,069 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:23:58,070 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:23:58,070 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:23:58,070 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:23:58,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:23:58,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:23:58,078 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:23:58,123 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:23:58,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:23:58,124 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:23:58,124 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:23:58,125 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:23:58,126 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:23:58,126 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:23:58,126 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:23:58,126 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:23:58,127 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:23:58,128 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:23:58,128 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:23:58,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:23:58,130 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:23:58,130 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:23:58,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:23:58,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:23:58,131 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:23:58,131 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:23:58,131 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:23:58,132 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:23:58,132 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:23:58,132 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:23:58,132 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:23:58,133 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:23:58,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:23:58,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:23:58,133 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:23:58,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:23:58,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:23:58,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:23:58,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:23:58,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:23:58,135 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:23:58,135 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:23:58,136 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:23:58,136 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:23:58,136 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:23:58,136 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_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 77c0c06cf345be89a7bfdea692ab0197740d9f5ad98baaf39e02029ee2fea03a [2021-11-23 17:23:58,584 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:23:58,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:23:58,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:23:58,617 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:23:58,618 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:23:58,620 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem11_label56.c [2021-11-23 17:23:58,700 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/data/0b8fea01f/ad453297336c4960b3c415704e0f973b/FLAG30cb513ab [2021-11-23 17:23:59,395 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:23:59,397 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/sv-benchmarks/c/eca-rers2012/Problem11_label56.c [2021-11-23 17:23:59,413 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/data/0b8fea01f/ad453297336c4960b3c415704e0f973b/FLAG30cb513ab [2021-11-23 17:23:59,600 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/data/0b8fea01f/ad453297336c4960b3c415704e0f973b [2021-11-23 17:23:59,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:23:59,604 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:23:59,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:23:59,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:23:59,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:23:59,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:23:59" (1/1) ... [2021-11-23 17:23:59,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63f241c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:59, skipping insertion in model container [2021-11-23 17:23:59,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:23:59" (1/1) ... [2021-11-23 17:23:59,631 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:23:59,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:23:59,930 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_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/sv-benchmarks/c/eca-rers2012/Problem11_label56.c[5994,6007] [2021-11-23 17:24:00,307 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:24:00,318 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:24:00,343 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_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/sv-benchmarks/c/eca-rers2012/Problem11_label56.c[5994,6007] [2021-11-23 17:24:00,545 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:24:00,562 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:24:00,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:00 WrapperNode [2021-11-23 17:24:00,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:24:00,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:24:00,565 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:24:00,565 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:24:00,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:00" (1/1) ... [2021-11-23 17:24:00,616 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:00" (1/1) ... [2021-11-23 17:24:00,733 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 997 [2021-11-23 17:24:00,733 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:24:00,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:24:00,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:24:00,736 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:24:00,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:00" (1/1) ... [2021-11-23 17:24:00,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:00" (1/1) ... [2021-11-23 17:24:00,762 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:00" (1/1) ... [2021-11-23 17:24:00,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:00" (1/1) ... [2021-11-23 17:24:00,817 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:00" (1/1) ... [2021-11-23 17:24:00,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:00" (1/1) ... [2021-11-23 17:24:00,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:00" (1/1) ... [2021-11-23 17:24:00,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:24:00,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:24:00,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:24:00,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:24:00,879 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:00" (1/1) ... [2021-11-23 17:24:00,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:24:00,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:24:00,912 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:24:00,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:24:00,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:24:00,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:24:00,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:24:00,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:24:01,026 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:24:01,028 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:24:08,998 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:24:09,009 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:24:09,010 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:24:09,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:24:09 BoogieIcfgContainer [2021-11-23 17:24:09,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:24:09,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:24:09,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:24:09,018 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:24:09,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:23:59" (1/3) ... [2021-11-23 17:24:09,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@448fa2bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:24:09, skipping insertion in model container [2021-11-23 17:24:09,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:00" (2/3) ... [2021-11-23 17:24:09,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@448fa2bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:24:09, skipping insertion in model container [2021-11-23 17:24:09,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:24:09" (3/3) ... [2021-11-23 17:24:09,023 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label56.c [2021-11-23 17:24:09,028 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:24:09,029 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:24:09,097 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:24:09,118 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 17:24:09,123 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:24:09,163 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 17:24:09,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 17:24:09,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:09,173 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, 1, 1, 1, 1] [2021-11-23 17:24:09,174 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:24:09,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:09,180 INFO L85 PathProgramCache]: Analyzing trace with hash 751578873, now seen corresponding path program 1 times [2021-11-23 17:24:09,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:09,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834822685] [2021-11-23 17:24:09,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:09,199 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:09,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:09,203 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:09,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:24:09,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:09,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:24:09,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:09,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:09,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:24:09,626 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:24:09,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834822685] [2021-11-23 17:24:09,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834822685] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:24:09,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:24:09,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:24:09,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103001322] [2021-11-23 17:24:09,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:24:09,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:24:09,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:09,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:24:09,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:24:09,679 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 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:18,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:24:18,628 INFO L93 Difference]: Finished difference Result 758 states and 1342 transitions. [2021-11-23 17:24:18,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:24:18,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-23 17:24:18,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:24:18,656 INFO L225 Difference]: With dead ends: 758 [2021-11-23 17:24:18,656 INFO L226 Difference]: Without dead ends: 410 [2021-11-23 17:24:18,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 39 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 17:24:18,670 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 184 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:24:18,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 220 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2021-11-23 17:24:18,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-11-23 17:24:18,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2021-11-23 17:24:18,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.4572127139364304) internal successors, (596), 409 states have internal predecessors, (596), 0 states have call successors, (0), 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 17:24:18,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 596 transitions. [2021-11-23 17:24:18,776 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 596 transitions. Word has length 41 [2021-11-23 17:24:18,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:24:18,777 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 596 transitions. [2021-11-23 17:24:18,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:18,778 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 596 transitions. [2021-11-23 17:24:18,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-23 17:24:18,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:18,786 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, 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 17:24:18,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 17:24:18,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:24:18,987 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:24:18,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:18,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1616931328, now seen corresponding path program 1 times [2021-11-23 17:24:18,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:18,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603111100] [2021-11-23 17:24:18,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:18,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:18,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:18,997 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:19,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:24:19,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:19,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:24:19,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:19,530 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:19,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:24:19,530 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:24:19,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603111100] [2021-11-23 17:24:19,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603111100] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:24:19,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:24:19,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:24:19,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230619842] [2021-11-23 17:24:19,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:24:19,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:24:19,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:19,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:24:19,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:24:19,534 INFO L87 Difference]: Start difference. First operand 410 states and 596 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 0 states have call successors, (0), 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 17:24:29,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:24:29,636 INFO L93 Difference]: Finished difference Result 1202 states and 1754 transitions. [2021-11-23 17:24:29,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:24:29,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 0 states have call successors, (0), 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 109 [2021-11-23 17:24:29,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:24:29,648 INFO L225 Difference]: With dead ends: 1202 [2021-11-23 17:24:29,649 INFO L226 Difference]: Without dead ends: 794 [2021-11-23 17:24:29,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 107 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 17:24:29,653 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 132 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:24:29,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 187 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2021-11-23 17:24:29,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-11-23 17:24:29,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 782. [2021-11-23 17:24:29,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 1.3469910371318823) internal successors, (1052), 781 states have internal predecessors, (1052), 0 states have call successors, (0), 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 17:24:29,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1052 transitions. [2021-11-23 17:24:29,691 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1052 transitions. Word has length 109 [2021-11-23 17:24:29,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:24:29,692 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 1052 transitions. [2021-11-23 17:24:29,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 0 states have call successors, (0), 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 17:24:29,693 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1052 transitions. [2021-11-23 17:24:29,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 17:24:29,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:29,696 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, 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] [2021-11-23 17:24:29,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:29,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:24:29,908 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:24:29,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:29,909 INFO L85 PathProgramCache]: Analyzing trace with hash -2133537260, now seen corresponding path program 1 times [2021-11-23 17:24:29,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:29,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1287280738] [2021-11-23 17:24:29,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:29,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:29,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:29,912 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:29,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:24:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:30,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:24:30,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:30,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:24:30,439 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:24:30,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1287280738] [2021-11-23 17:24:30,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1287280738] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:24:30,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:24:30,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:24:30,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972491464] [2021-11-23 17:24:30,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:24:30,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:24:30,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:30,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:24:30,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:24:30,442 INFO L87 Difference]: Start difference. First operand 782 states and 1052 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 0 states have call successors, (0), 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 17:24:38,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:24:38,254 INFO L93 Difference]: Finished difference Result 1931 states and 2544 transitions. [2021-11-23 17:24:38,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:24:38,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 0 states have call successors, (0), 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 117 [2021-11-23 17:24:38,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:24:38,280 INFO L225 Difference]: With dead ends: 1931 [2021-11-23 17:24:38,280 INFO L226 Difference]: Without dead ends: 1151 [2021-11-23 17:24:38,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 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 17:24:38,283 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 112 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:24:38,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 194 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2021-11-23 17:24:38,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-11-23 17:24:38,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 1150. [2021-11-23 17:24:38,334 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 17:24:38,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1444 transitions. [2021-11-23 17:24:38,340 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1444 transitions. Word has length 117 [2021-11-23 17:24:38,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:24:38,341 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 1444 transitions. [2021-11-23 17:24:38,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 0 states have call successors, (0), 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 17:24:38,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1444 transitions. [2021-11-23 17:24:38,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-23 17:24:38,355 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:38,356 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, 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] [2021-11-23 17:24:38,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:38,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:24:38,568 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:24:38,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:38,569 INFO L85 PathProgramCache]: Analyzing trace with hash -5295579, now seen corresponding path program 1 times [2021-11-23 17:24:38,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:38,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775350218] [2021-11-23 17:24:38,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:38,571 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:38,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:38,571 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:38,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:24:38,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:38,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:24:38,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:39,071 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:39,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:24:39,072 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:24:39,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775350218] [2021-11-23 17:24:39,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775350218] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:24:39,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:24:39,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:24:39,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636961637] [2021-11-23 17:24:39,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:24:39,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:24:39,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:39,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:24:39,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:24:39,075 INFO L87 Difference]: Start difference. First operand 1150 states and 1444 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 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 17:24:47,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:24:47,783 INFO L93 Difference]: Finished difference Result 1948 states and 2632 transitions. [2021-11-23 17:24:47,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:24:47,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 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 168 [2021-11-23 17:24:47,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:24:47,807 INFO L225 Difference]: With dead ends: 1948 [2021-11-23 17:24:47,807 INFO L226 Difference]: Without dead ends: 1542 [2021-11-23 17:24:47,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 166 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 17:24:47,810 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 194 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:24:47,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 322 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2021-11-23 17:24:47,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2021-11-23 17:24:47,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1539. [2021-11-23 17:24:47,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 1.2711313394018204) internal successors, (1955), 1538 states have internal predecessors, (1955), 0 states have call successors, (0), 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 17:24:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 1955 transitions. [2021-11-23 17:24:47,852 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 1955 transitions. Word has length 168 [2021-11-23 17:24:47,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:24:47,853 INFO L470 AbstractCegarLoop]: Abstraction has 1539 states and 1955 transitions. [2021-11-23 17:24:47,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 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 17:24:47,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 1955 transitions. [2021-11-23 17:24:47,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-23 17:24:47,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:47,858 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:24:47,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:48,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:24:48,071 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:24:48,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:48,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1026216253, now seen corresponding path program 1 times [2021-11-23 17:24:48,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:48,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360275833] [2021-11-23 17:24:48,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:48,073 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:48,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:48,076 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:48,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:24:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:48,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:24:48,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:48,758 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:48,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:24:48,759 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:24:48,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360275833] [2021-11-23 17:24:48,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1360275833] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:24:48,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:24:48,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:24:48,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660609789] [2021-11-23 17:24:48,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:24:48,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:24:48,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:48,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:24:48,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:24:48,762 INFO L87 Difference]: Start difference. First operand 1539 states and 1955 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 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 17:24:57,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:24:57,429 INFO L93 Difference]: Finished difference Result 3279 states and 4345 transitions. [2021-11-23 17:24:57,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:24:57,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 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 221 [2021-11-23 17:24:57,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:24:57,450 INFO L225 Difference]: With dead ends: 3279 [2021-11-23 17:24:57,450 INFO L226 Difference]: Without dead ends: 2110 [2021-11-23 17:24:57,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 219 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 17:24:57,454 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 136 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:24:57,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 340 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2021-11-23 17:24:57,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2021-11-23 17:24:57,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 2097. [2021-11-23 17:24:57,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2097 states, 2096 states have (on average 1.2533396946564885) internal successors, (2627), 2096 states have internal predecessors, (2627), 0 states have call successors, (0), 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 17:24:57,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2097 states to 2097 states and 2627 transitions. [2021-11-23 17:24:57,511 INFO L78 Accepts]: Start accepts. Automaton has 2097 states and 2627 transitions. Word has length 221 [2021-11-23 17:24:57,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:24:57,511 INFO L470 AbstractCegarLoop]: Abstraction has 2097 states and 2627 transitions. [2021-11-23 17:24:57,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 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 17:24:57,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2097 states and 2627 transitions. [2021-11-23 17:24:57,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-23 17:24:57,516 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:57,517 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:24:57,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:57,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:24:57,732 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:24:57,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:57,734 INFO L85 PathProgramCache]: Analyzing trace with hash -288611651, now seen corresponding path program 1 times [2021-11-23 17:24:57,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:57,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743028318] [2021-11-23 17:24:57,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:57,736 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:57,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:57,737 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:57,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:24:57,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:57,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:24:57,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 77 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:00,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:03,725 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:03,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743028318] [2021-11-23 17:25:03,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743028318] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:25:03,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:25:03,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:25:03,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587646394] [2021-11-23 17:25:03,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:03,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:03,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:03,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:03,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:25:03,727 INFO L87 Difference]: Start difference. First operand 2097 states and 2627 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 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 17:25:19,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:19,664 INFO L93 Difference]: Finished difference Result 4188 states and 5463 transitions. [2021-11-23 17:25:19,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:19,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 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 222 [2021-11-23 17:25:19,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:19,692 INFO L225 Difference]: With dead ends: 4188 [2021-11-23 17:25:19,692 INFO L226 Difference]: Without dead ends: 3019 [2021-11-23 17:25:19,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 439 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 17:25:19,700 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 150 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s 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, 15.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:19,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 49 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 15.9s Time] [2021-11-23 17:25:19,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-11-23 17:25:19,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3019. [2021-11-23 17:25:19,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 3018 states have (on average 1.269715043074884) internal successors, (3832), 3018 states have internal predecessors, (3832), 0 states have call successors, (0), 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 17:25:19,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 3832 transitions. [2021-11-23 17:25:19,794 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 3832 transitions. Word has length 222 [2021-11-23 17:25:19,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:19,794 INFO L470 AbstractCegarLoop]: Abstraction has 3019 states and 3832 transitions. [2021-11-23 17:25:19,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 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 17:25:19,795 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 3832 transitions. [2021-11-23 17:25:19,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-11-23 17:25:19,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:19,800 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:25:19,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-23 17:25:20,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:20,014 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:20,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:20,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1420283807, now seen corresponding path program 1 times [2021-11-23 17:25:20,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:20,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1840415286] [2021-11-23 17:25:20,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:20,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:20,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:20,018 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:20,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:25:20,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:20,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:25:20,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 56 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:24,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 135 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:05,994 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:05,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1840415286] [2021-11-23 17:26:05,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1840415286] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:05,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1238527529] [2021-11-23 17:26:05,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:05,996 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:05,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:26:06,008 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:26:06,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-23 17:26:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:06,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:26:06,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:07,321 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-23 17:26:07,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:08,147 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-23 17:26:08,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1238527529] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:26:08,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 17:26:08,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4, 3] total 11 [2021-11-23 17:26:08,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881416078] [2021-11-23 17:26:08,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:08,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:26:08,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:08,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:26:08,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:26:08,150 INFO L87 Difference]: Start difference. First operand 3019 states and 3832 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 17:26:10,836 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:26:18,571 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:26:23,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:23,747 INFO L93 Difference]: Finished difference Result 6399 states and 8397 transitions. [2021-11-23 17:26:23,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:26:23,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 233 [2021-11-23 17:26:23,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:23,776 INFO L225 Difference]: With dead ends: 6399 [2021-11-23 17:26:23,776 INFO L226 Difference]: Without dead ends: 4492 [2021-11-23 17:26:23,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 919 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:26:23,781 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 209 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:23,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 92 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 15.5s Time] [2021-11-23 17:26:23,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4492 states. [2021-11-23 17:26:23,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4492 to 3387. [2021-11-23 17:26:23,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3387 states, 3386 states have (on average 1.3074424099232131) internal successors, (4427), 3386 states have internal predecessors, (4427), 0 states have call successors, (0), 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 17:26:23,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3387 states to 3387 states and 4427 transitions. [2021-11-23 17:26:23,895 INFO L78 Accepts]: Start accepts. Automaton has 3387 states and 4427 transitions. Word has length 233 [2021-11-23 17:26:23,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:23,896 INFO L470 AbstractCegarLoop]: Abstraction has 3387 states and 4427 transitions. [2021-11-23 17:26:23,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 17:26:23,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3387 states and 4427 transitions. [2021-11-23 17:26:23,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-23 17:26:23,902 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:23,903 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:26:23,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:24,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-23 17:26:24,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:24,308 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:24,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:24,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1634517610, now seen corresponding path program 1 times [2021-11-23 17:26:24,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:24,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625370883] [2021-11-23 17:26:24,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:24,310 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:24,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:24,311 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:24,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:26:24,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:24,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:26:24,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:25,136 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:25,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:25,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:25,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625370883] [2021-11-23 17:26:25,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625370883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:25,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:25,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:26:25,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640808346] [2021-11-23 17:26:25,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:25,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:26:25,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:25,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:26:25,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:26:25,140 INFO L87 Difference]: Start difference. First operand 3387 states and 4427 transitions. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 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 17:26:34,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:34,946 INFO L93 Difference]: Finished difference Result 7692 states and 10295 transitions. [2021-11-23 17:26:34,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:26:34,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 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 236 [2021-11-23 17:26:34,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:34,974 INFO L225 Difference]: With dead ends: 7692 [2021-11-23 17:26:34,974 INFO L226 Difference]: Without dead ends: 4490 [2021-11-23 17:26:34,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 234 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 17:26:34,979 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 151 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:34,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 347 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2021-11-23 17:26:34,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4490 states. [2021-11-23 17:26:35,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4490 to 3366. [2021-11-23 17:26:35,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3366 states, 3365 states have (on average 1.3060921248142645) internal successors, (4395), 3365 states have internal predecessors, (4395), 0 states have call successors, (0), 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 17:26:35,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 4395 transitions. [2021-11-23 17:26:35,092 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 4395 transitions. Word has length 236 [2021-11-23 17:26:35,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:35,093 INFO L470 AbstractCegarLoop]: Abstraction has 3366 states and 4395 transitions. [2021-11-23 17:26:35,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 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 17:26:35,093 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 4395 transitions. [2021-11-23 17:26:35,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-23 17:26:35,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:35,099 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:35,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:35,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:35,315 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:35,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:35,316 INFO L85 PathProgramCache]: Analyzing trace with hash 748674339, now seen corresponding path program 1 times [2021-11-23 17:26:35,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:35,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490528352] [2021-11-23 17:26:35,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:35,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:35,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:35,319 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:35,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:26:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:35,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:26:35,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:38,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 79 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:43,504 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:43,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490528352] [2021-11-23 17:26:43,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490528352] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:43,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2061436236] [2021-11-23 17:26:43,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:43,505 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:43,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:26:43,511 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:26:43,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 17:26:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:43,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:26:43,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-23 17:26:44,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:44,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2061436236] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:44,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:26:44,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 10 [2021-11-23 17:26:44,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544074775] [2021-11-23 17:26:44,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:44,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:26:44,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:44,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:26:44,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:26:44,634 INFO L87 Difference]: Start difference. First operand 3366 states and 4395 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 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 17:26:48,460 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:27:09,159 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 17:27:17,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:17,514 INFO L93 Difference]: Finished difference Result 8590 states and 11464 transitions. [2021-11-23 17:27:17,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:27:17,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 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 250 [2021-11-23 17:27:17,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:17,549 INFO L225 Difference]: With dead ends: 8590 [2021-11-23 17:27:17,549 INFO L226 Difference]: Without dead ends: 5410 [2021-11-23 17:27:17,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 749 GetRequests, 740 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:27:17,570 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 390 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:17,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 55 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 32.7s Time] [2021-11-23 17:27:17,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5410 states. [2021-11-23 17:27:17,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5410 to 4100. [2021-11-23 17:27:17,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4100 states, 4099 states have (on average 1.2625030495242742) internal successors, (5175), 4099 states have internal predecessors, (5175), 0 states have call successors, (0), 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 17:27:17,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4100 states to 4100 states and 5175 transitions. [2021-11-23 17:27:17,696 INFO L78 Accepts]: Start accepts. Automaton has 4100 states and 5175 transitions. Word has length 250 [2021-11-23 17:27:17,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:17,697 INFO L470 AbstractCegarLoop]: Abstraction has 4100 states and 5175 transitions. [2021-11-23 17:27:17,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 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 17:27:17,698 INFO L276 IsEmpty]: Start isEmpty. Operand 4100 states and 5175 transitions. [2021-11-23 17:27:17,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-11-23 17:27:17,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:17,709 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:17,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:17,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-11-23 17:27:18,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:18,123 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:18,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:18,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1271136243, now seen corresponding path program 1 times [2021-11-23 17:27:18,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:18,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647496927] [2021-11-23 17:27:18,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:18,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:18,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:18,128 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:18,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:27:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:18,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:27:18,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 50 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:22,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:26,542 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 189 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:26,543 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:26,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647496927] [2021-11-23 17:27:26,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647496927] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:26,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [602215132] [2021-11-23 17:27:26,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:26,543 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:26,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:27:26,544 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:27:26,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 17:27:26,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:26,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:27:26,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-23 17:27:28,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:27:28,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [602215132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:27:28,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:27:28,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 4] total 12 [2021-11-23 17:27:28,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176670025] [2021-11-23 17:27:28,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:27:28,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:27:28,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:28,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:27:28,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-23 17:27:28,298 INFO L87 Difference]: Start difference. First operand 4100 states and 5175 transitions. Second operand has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 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 17:28:09,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:28:09,614 INFO L93 Difference]: Finished difference Result 9750 states and 12598 transitions. [2021-11-23 17:28:09,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:28:09,620 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 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 324 [2021-11-23 17:28:09,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:28:09,658 INFO L225 Difference]: With dead ends: 9750 [2021-11-23 17:28:09,658 INFO L226 Difference]: Without dead ends: 6020 [2021-11-23 17:28:09,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 971 GetRequests, 960 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-23 17:28:09,662 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 452 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1788 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 2106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:28:09,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 147 Invalid, 2106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1788 Invalid, 0 Unknown, 0 Unchecked, 41.1s Time] [2021-11-23 17:28:09,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6020 states. [2021-11-23 17:28:09,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6020 to 4652. [2021-11-23 17:28:09,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4652 states, 4651 states have (on average 1.221027735970759) internal successors, (5679), 4651 states have internal predecessors, (5679), 0 states have call successors, (0), 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 17:28:09,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4652 states to 4652 states and 5679 transitions. [2021-11-23 17:28:09,840 INFO L78 Accepts]: Start accepts. Automaton has 4652 states and 5679 transitions. Word has length 324 [2021-11-23 17:28:09,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:28:09,841 INFO L470 AbstractCegarLoop]: Abstraction has 4652 states and 5679 transitions. [2021-11-23 17:28:09,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 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 17:28:09,842 INFO L276 IsEmpty]: Start isEmpty. Operand 4652 states and 5679 transitions. [2021-11-23 17:28:09,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2021-11-23 17:28:09,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:28:09,859 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, 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, 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] [2021-11-23 17:28:09,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-11-23 17:28:10,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-23 17:28:10,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:28:10,263 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:28:10,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:28:10,263 INFO L85 PathProgramCache]: Analyzing trace with hash -73087586, now seen corresponding path program 1 times [2021-11-23 17:28:10,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:28:10,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796401861] [2021-11-23 17:28:10,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:28:10,266 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:28:10,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:28:10,270 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:28:10,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:28:10,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:28:10,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:28:10,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:28:11,597 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 299 proven. 97 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 17:28:11,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:28:13,042 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 396 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 17:28:13,043 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:28:13,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796401861] [2021-11-23 17:28:13,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796401861] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:28:13,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:28:13,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:28:13,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769337799] [2021-11-23 17:28:13,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:28:13,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:28:13,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:28:13,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:28:13,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:28:13,045 INFO L87 Difference]: Start difference. First operand 4652 states and 5679 transitions. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 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 17:28:26,569 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:28:36,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:28:36,478 INFO L93 Difference]: Finished difference Result 10958 states and 13504 transitions. [2021-11-23 17:28:36,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:28:36,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 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 399 [2021-11-23 17:28:36,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:28:36,494 INFO L225 Difference]: With dead ends: 10958 [2021-11-23 17:28:36,494 INFO L226 Difference]: Without dead ends: 6676 [2021-11-23 17:28:36,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 796 GetRequests, 793 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 17:28:36,499 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 109 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 144 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:28:36,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 322 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 497 Invalid, 1 Unknown, 0 Unchecked, 23.4s Time] [2021-11-23 17:28:36,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6676 states. [2021-11-23 17:28:36,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6676 to 6492. [2021-11-23 17:28:36,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6492 states, 6491 states have (on average 1.1887228470189493) internal successors, (7716), 6491 states have internal predecessors, (7716), 0 states have call successors, (0), 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 17:28:36,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6492 states to 6492 states and 7716 transitions. [2021-11-23 17:28:36,662 INFO L78 Accepts]: Start accepts. Automaton has 6492 states and 7716 transitions. Word has length 399 [2021-11-23 17:28:36,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:28:36,662 INFO L470 AbstractCegarLoop]: Abstraction has 6492 states and 7716 transitions. [2021-11-23 17:28:36,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 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 17:28:36,664 INFO L276 IsEmpty]: Start isEmpty. Operand 6492 states and 7716 transitions. [2021-11-23 17:28:36,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2021-11-23 17:28:36,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:28:36,687 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 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] [2021-11-23 17:28:36,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:28:36,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:28:36,905 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:28:36,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:28:36,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1876864515, now seen corresponding path program 1 times [2021-11-23 17:28:36,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:28:36,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [734859623] [2021-11-23 17:28:36,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:28:36,910 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:28:36,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:28:36,911 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:28:36,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:28:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:28:37,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:28:37,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:28:38,699 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 449 proven. 81 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-23 17:28:38,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:28:40,003 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 530 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-23 17:28:40,003 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:28:40,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [734859623] [2021-11-23 17:28:40,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [734859623] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:28:40,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:28:40,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:28:40,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638906859] [2021-11-23 17:28:40,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:28:40,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:28:40,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:28:40,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:28:40,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:28:40,007 INFO L87 Difference]: Start difference. First operand 6492 states and 7716 transitions. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 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 17:28:57,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:28:57,262 INFO L93 Difference]: Finished difference Result 13718 states and 16412 transitions. [2021-11-23 17:28:57,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:28:57,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 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 466 [2021-11-23 17:28:57,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:28:57,289 INFO L225 Difference]: With dead ends: 13718 [2021-11-23 17:28:57,289 INFO L226 Difference]: Without dead ends: 7596 [2021-11-23 17:28:57,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 930 GetRequests, 927 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 17:28:57,297 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 144 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:28:57,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 111 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 17.2s Time] [2021-11-23 17:28:57,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7596 states. [2021-11-23 17:28:57,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7596 to 7596. [2021-11-23 17:28:57,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7596 states, 7595 states have (on average 1.1691902567478605) internal successors, (8880), 7595 states have internal predecessors, (8880), 0 states have call successors, (0), 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 17:28:57,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7596 states to 7596 states and 8880 transitions. [2021-11-23 17:28:57,508 INFO L78 Accepts]: Start accepts. Automaton has 7596 states and 8880 transitions. Word has length 466 [2021-11-23 17:28:57,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:28:57,510 INFO L470 AbstractCegarLoop]: Abstraction has 7596 states and 8880 transitions. [2021-11-23 17:28:57,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 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 17:28:57,510 INFO L276 IsEmpty]: Start isEmpty. Operand 7596 states and 8880 transitions. [2021-11-23 17:28:57,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-11-23 17:28:57,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:28:57,530 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 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] [2021-11-23 17:28:57,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:28:57,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:28:57,749 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:28:57,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:28:57,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1404052740, now seen corresponding path program 1 times [2021-11-23 17:28:57,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:28:57,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2097520398] [2021-11-23 17:28:57,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:28:57,754 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:28:57,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:28:57,756 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:28:57,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 17:28:58,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:28:58,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 17:28:58,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:29:01,059 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 417 proven. 260 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 17:29:01,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:29:27,608 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 498 proven. 179 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 17:29:27,608 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:29:27,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2097520398] [2021-11-23 17:29:27,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2097520398] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:29:27,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [323288196] [2021-11-23 17:29:27,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:29:27,609 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:29:27,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:29:27,623 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:29:27,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-23 17:29:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:29:27,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:29:27,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:29:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 417 proven. 39 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-11-23 17:29:30,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:29:32,023 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 417 proven. 39 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-11-23 17:29:32,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [323288196] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:29:32,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506083179] [2021-11-23 17:29:32,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:29:32,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:29:32,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:29:32,025 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:29:32,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 17:29:32,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:29:32,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:29:32,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:29:33,155 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 456 proven. 0 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-11-23 17:29:33,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:29:33,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506083179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:29:33,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:29:33,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5, 5, 5] total 13 [2021-11-23 17:29:33,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000205233] [2021-11-23 17:29:33,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:29:33,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:29:33,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:29:33,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:29:33,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-23 17:29:33,162 INFO L87 Difference]: Start difference. First operand 7596 states and 8880 transitions. Second operand has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 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 17:29:44,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:29:44,879 INFO L93 Difference]: Finished difference Result 15368 states and 18223 transitions. [2021-11-23 17:29:44,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:29:44,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 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 476 [2021-11-23 17:29:44,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:29:44,902 INFO L225 Difference]: With dead ends: 15368 [2021-11-23 17:29:44,902 INFO L226 Difference]: Without dead ends: 9803 [2021-11-23 17:29:44,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2375 GetRequests, 2364 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-23 17:29:44,909 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 62 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:29:44,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 370 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 11.6s Time] [2021-11-23 17:29:44,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9803 states. [2021-11-23 17:29:45,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9803 to 9435. [2021-11-23 17:29:45,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9435 states, 9434 states have (on average 1.158999364002544) internal successors, (10934), 9434 states have internal predecessors, (10934), 0 states have call successors, (0), 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 17:29:45,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9435 states to 9435 states and 10934 transitions. [2021-11-23 17:29:45,120 INFO L78 Accepts]: Start accepts. Automaton has 9435 states and 10934 transitions. Word has length 476 [2021-11-23 17:29:45,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:29:45,121 INFO L470 AbstractCegarLoop]: Abstraction has 9435 states and 10934 transitions. [2021-11-23 17:29:45,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 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 17:29:45,122 INFO L276 IsEmpty]: Start isEmpty. Operand 9435 states and 10934 transitions. [2021-11-23 17:29:45,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2021-11-23 17:29:45,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:29:45,145 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:29:45,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:29:45,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:29:45,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:29:45,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:29:45,760 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:29:45,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:29:45,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1489523097, now seen corresponding path program 1 times [2021-11-23 17:29:45,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:29:45,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2143539010] [2021-11-23 17:29:45,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:29:45,765 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:29:45,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:29:45,766 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:29:45,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 17:29:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:29:46,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 17:29:46,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:29:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 450 proven. 284 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 17:29:50,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:30:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 531 proven. 203 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 17:30:17,725 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:30:17,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2143539010] [2021-11-23 17:30:17,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2143539010] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:30:17,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [87649401] [2021-11-23 17:30:17,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:30:17,726 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:30:17,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:30:17,726 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:30:17,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-23 17:30:18,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:30:18,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:30:18,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:30:24,854 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 71 proven. 621 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-23 17:30:24,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:30:38,671 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 95 proven. 597 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-23 17:30:38,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [87649401] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:30:38,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345150568] [2021-11-23 17:30:38,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:30:38,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:30:38,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:30:38,673 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:30:38,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ac3b27-b9f8-45ee-8bff-8ed1defae30d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 17:30:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:30:38,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:30:38,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:30:40,371 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 450 proven. 203 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-23 17:30:40,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:30:53,570 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 652 proven. 82 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 17:30:53,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345150568] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:30:53,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:30:53,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7, 7, 3, 4] total 20 [2021-11-23 17:30:53,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643092353] [2021-11-23 17:30:53,572 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:30:53,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 17:30:53,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:30:53,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 17:30:53,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-11-23 17:30:53,576 INFO L87 Difference]: Start difference. First operand 9435 states and 10934 transitions. Second operand has 21 states, 21 states have (on average 82.28571428571429) internal successors, (1728), 20 states have internal predecessors, (1728), 0 states have call successors, (0), 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 17:31:29,069 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:31:41,327 WARN L534 Checker$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 17:31:52,163 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:32:29,343 WARN L534 Checker$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 17:32:33,569 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:32:36,553 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:32:39,610 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:32:49,358 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:32:56,491 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:32:57,503 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:15,991 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:18,480 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:21,072 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:26,511 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:31,835 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:34,203 WARN L534 Checker$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 17:33:35,574 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:44,957 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:48,459 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:55,584 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:34:08,523 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:34:12,690 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:34:23,297 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:34:24,705 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:34:32,101 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:34:34,107 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:34:41,100 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:34:45,568 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:34:51,564 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:34:53,682 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:34:56,337 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:01,313 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:06,082 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:13,395 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:16,183 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:20,886 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:42,987 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:44,003 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:52,558 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:02,299 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:06,134 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:08,140 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:13,571 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:19,186 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:27,006 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:28,555 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:37,681 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:43,421 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:57,167 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:58,537 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:37:17,734 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:37:23,781 WARN L534 Checker$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 17:37:29,753 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 []