./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.UNBOUNDED.pals.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_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/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_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/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_42b5512d-7a2f-46a1-bf0c-89f68a71d423/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 0490559c2bf039cbe49bd5644a18ada08843fe5179dc7b178541a9c54e014b6c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:14:50,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:14:50,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:14:50,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:14:50,793 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:14:50,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:14:50,797 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:14:50,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:14:50,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:14:50,804 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:14:50,806 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:14:50,808 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:14:50,809 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:14:50,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:14:50,813 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:14:50,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:14:50,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:14:50,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:14:50,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:14:50,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:14:50,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:14:50,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:14:50,833 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:14:50,834 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:14:50,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:14:50,841 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:14:50,849 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:14:50,851 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:14:50,851 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:14:50,853 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:14:50,859 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:14:50,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:14:50,876 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:14:50,878 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:14:50,879 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:14:50,879 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:14:50,880 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:14:50,881 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:14:50,881 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:14:50,882 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:14:50,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:14:50,884 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:14:50,940 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:14:50,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:14:50,941 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:14:50,941 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:14:50,942 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:14:50,943 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:14:50,943 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:14:50,943 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:14:50,944 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:14:50,944 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:14:50,944 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:14:50,944 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:14:50,945 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:14:50,945 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:14:50,945 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:14:50,946 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:14:50,946 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:14:50,946 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:14:50,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:14:50,947 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:14:50,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:14:50,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:14:50,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:14:50,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:14:50,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:14:50,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:14:50,949 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:14:50,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:14:50,950 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:14:50,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:14:50,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:14:50,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:14:50,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:14:50,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:14:50,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:14:50,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:14:50,952 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:14:50,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:14:50,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:14:50,953 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:14:50,953 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:14:50,954 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_42b5512d-7a2f-46a1-bf0c-89f68a71d423/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0490559c2bf039cbe49bd5644a18ada08843fe5179dc7b178541a9c54e014b6c [2021-11-23 17:14:51,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:14:51,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:14:51,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:14:51,270 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:14:51,271 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:14:51,273 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.UNBOUNDED.pals.c [2021-11-23 17:14:51,365 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/data/03dda7be5/a764bfd0590345a89773938f607213fb/FLAG9d91d3532 [2021-11-23 17:14:52,035 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:14:52,036 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.UNBOUNDED.pals.c [2021-11-23 17:14:52,054 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/data/03dda7be5/a764bfd0590345a89773938f607213fb/FLAG9d91d3532 [2021-11-23 17:14:52,346 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/data/03dda7be5/a764bfd0590345a89773938f607213fb [2021-11-23 17:14:52,353 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:14:52,356 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:14:52,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:14:52,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:14:52,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:14:52,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:14:52" (1/1) ... [2021-11-23 17:14:52,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b8ec54f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:52, skipping insertion in model container [2021-11-23 17:14:52,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:14:52" (1/1) ... [2021-11-23 17:14:52,383 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:14:52,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:14:52,728 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_42b5512d-7a2f-46a1-bf0c-89f68a71d423/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.UNBOUNDED.pals.c[12966,12979] [2021-11-23 17:14:52,732 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:14:52,743 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:14:52,867 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_42b5512d-7a2f-46a1-bf0c-89f68a71d423/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.UNBOUNDED.pals.c[12966,12979] [2021-11-23 17:14:52,870 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:14:52,906 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:14:52,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:52 WrapperNode [2021-11-23 17:14:52,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:14:52,909 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:14:52,909 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:14:52,910 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:14:52,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:52" (1/1) ... [2021-11-23 17:14:52,955 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:52" (1/1) ... [2021-11-23 17:14:53,027 INFO L137 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 443 [2021-11-23 17:14:53,028 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:14:53,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:14:53,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:14:53,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:14:53,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:52" (1/1) ... [2021-11-23 17:14:53,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:52" (1/1) ... [2021-11-23 17:14:53,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:52" (1/1) ... [2021-11-23 17:14:53,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:52" (1/1) ... [2021-11-23 17:14:53,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:52" (1/1) ... [2021-11-23 17:14:53,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:52" (1/1) ... [2021-11-23 17:14:53,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:52" (1/1) ... [2021-11-23 17:14:53,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:14:53,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:14:53,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:14:53,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:14:53,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:52" (1/1) ... [2021-11-23 17:14:53,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:14:53,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:14:53,184 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:14:53,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:14:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:14:53,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:14:53,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:14:53,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:14:53,414 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:14:53,416 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:14:54,173 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:14:54,230 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 17:14:54,235 INFO L158 Benchmark]: Toolchain (without parser) took 1877.86ms. Allocated memory was 98.6MB in the beginning and 130.0MB in the end (delta: 31.5MB). Free memory was 68.2MB in the beginning and 77.8MB in the end (delta: -9.7MB). Peak memory consumption was 31.2MB. Max. memory is 16.1GB. [2021-11-23 17:14:54,236 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 98.6MB. Free memory is still 67.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:14:54,237 INFO L158 Benchmark]: CACSL2BoogieTranslator took 546.14ms. Allocated memory is still 98.6MB. Free memory was 68.0MB in the beginning and 52.4MB in the end (delta: 15.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-23 17:14:54,238 INFO L158 Benchmark]: Boogie Procedure Inliner took 118.82ms. Allocated memory is still 98.6MB. Free memory was 52.3MB in the beginning and 49.4MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:14:54,239 INFO L158 Benchmark]: Boogie Preprocessor took 62.14ms. Allocated memory is still 98.6MB. Free memory was 49.4MB in the beginning and 47.1MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:14:54,240 INFO L158 Benchmark]: RCFGBuilder took 1141.24ms. Allocated memory was 98.6MB in the beginning and 130.0MB in the end (delta: 31.5MB). Free memory was 47.1MB in the beginning and 77.8MB in the end (delta: -30.7MB). Peak memory consumption was 10.2MB. Max. memory is 16.1GB. [2021-11-23 17:14:54,244 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 98.6MB. Free memory is still 67.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 546.14ms. Allocated memory is still 98.6MB. Free memory was 68.0MB in the beginning and 52.4MB in the end (delta: 15.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 118.82ms. Allocated memory is still 98.6MB. Free memory was 52.3MB in the beginning and 49.4MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 62.14ms. Allocated memory is still 98.6MB. Free memory was 49.4MB in the beginning and 47.1MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1141.24ms. Allocated memory was 98.6MB in the beginning and 130.0MB in the end (delta: 31.5MB). Free memory was 47.1MB in the beginning and 77.8MB in the end (delta: -30.7MB). Peak memory consumption was 10.2MB. 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 17:14:54,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/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_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/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_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/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_42b5512d-7a2f-46a1-bf0c-89f68a71d423/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 0490559c2bf039cbe49bd5644a18ada08843fe5179dc7b178541a9c54e014b6c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:14:57,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:14:57,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:14:57,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:14:57,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:14:57,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:14:57,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:14:57,408 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:14:57,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:14:57,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:14:57,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:14:57,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:14:57,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:14:57,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:14:57,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:14:57,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:14:57,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:14:57,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:14:57,430 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:14:57,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:14:57,437 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:14:57,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:14:57,441 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:14:57,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:14:57,448 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:14:57,449 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:14:57,449 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:14:57,451 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:14:57,452 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:14:57,453 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:14:57,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:14:57,455 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:14:57,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:14:57,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:14:57,460 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:14:57,460 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:14:57,470 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:14:57,471 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:14:57,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:14:57,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:14:57,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:14:57,475 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:14:57,510 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:14:57,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:14:57,511 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:14:57,511 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:14:57,512 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:14:57,513 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:14:57,513 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:14:57,513 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:14:57,514 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:14:57,514 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:14:57,514 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:14:57,514 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:14:57,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:14:57,516 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:14:57,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:14:57,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:14:57,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:14:57,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:14:57,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:14:57,518 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:14:57,518 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:14:57,518 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:14:57,519 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:14:57,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:14:57,519 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:14:57,520 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:14:57,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:14:57,520 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:14:57,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:14:57,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:14:57,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:14:57,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:14:57,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:14:57,522 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:14:57,523 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:14:57,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:14:57,523 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:14:57,523 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:14:57,524 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_42b5512d-7a2f-46a1-bf0c-89f68a71d423/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0490559c2bf039cbe49bd5644a18ada08843fe5179dc7b178541a9c54e014b6c [2021-11-23 17:14:58,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:14:58,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:14:58,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:14:58,042 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:14:58,043 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:14:58,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.UNBOUNDED.pals.c [2021-11-23 17:14:58,130 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/data/a0e6ce144/0d05cbce650a48038a369f3067ad9fbb/FLAGc46bbce0d [2021-11-23 17:14:58,865 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:14:58,866 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.UNBOUNDED.pals.c [2021-11-23 17:14:58,882 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/data/a0e6ce144/0d05cbce650a48038a369f3067ad9fbb/FLAGc46bbce0d [2021-11-23 17:14:59,129 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/data/a0e6ce144/0d05cbce650a48038a369f3067ad9fbb [2021-11-23 17:14:59,132 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:14:59,134 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:14:59,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:14:59,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:14:59,141 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:14:59,142 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:14:59" (1/1) ... [2021-11-23 17:14:59,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37f82bb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:59, skipping insertion in model container [2021-11-23 17:14:59,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:14:59" (1/1) ... [2021-11-23 17:14:59,163 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:14:59,217 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:14:59,512 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_42b5512d-7a2f-46a1-bf0c-89f68a71d423/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.UNBOUNDED.pals.c[12966,12979] [2021-11-23 17:14:59,515 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:14:59,529 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:14:59,599 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_42b5512d-7a2f-46a1-bf0c-89f68a71d423/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.UNBOUNDED.pals.c[12966,12979] [2021-11-23 17:14:59,600 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:14:59,618 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:14:59,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:59 WrapperNode [2021-11-23 17:14:59,619 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:14:59,621 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:14:59,621 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:14:59,621 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:14:59,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:59" (1/1) ... [2021-11-23 17:14:59,644 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:59" (1/1) ... [2021-11-23 17:14:59,685 INFO L137 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 426 [2021-11-23 17:14:59,685 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:14:59,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:14:59,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:14:59,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:14:59,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:59" (1/1) ... [2021-11-23 17:14:59,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:59" (1/1) ... [2021-11-23 17:14:59,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:59" (1/1) ... [2021-11-23 17:14:59,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:59" (1/1) ... [2021-11-23 17:14:59,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:59" (1/1) ... [2021-11-23 17:14:59,749 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:59" (1/1) ... [2021-11-23 17:14:59,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:59" (1/1) ... [2021-11-23 17:14:59,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:14:59,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:14:59,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:14:59,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:14:59,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:59" (1/1) ... [2021-11-23 17:14:59,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:14:59,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:14:59,820 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:14:59,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:14:59,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:14:59,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:14:59,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:14:59,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:15:00,023 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:15:00,025 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:15:00,904 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:15:00,920 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:15:00,920 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:15:00,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:15:00 BoogieIcfgContainer [2021-11-23 17:15:00,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:15:00,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:15:00,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:15:00,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:15:00,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:14:59" (1/3) ... [2021-11-23 17:15:00,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68693940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:15:00, skipping insertion in model container [2021-11-23 17:15:00,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:59" (2/3) ... [2021-11-23 17:15:00,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68693940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:15:00, skipping insertion in model container [2021-11-23 17:15:00,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:15:00" (3/3) ... [2021-11-23 17:15:00,935 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.UNBOUNDED.pals.c [2021-11-23 17:15:00,943 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:15:00,943 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:15:01,028 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:15:01,040 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 17:15:01,040 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:15:01,084 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 135 states have (on average 1.7481481481481482) internal successors, (236), 136 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 17:15:01,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 17:15:01,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:01,101 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:15:01,101 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:01,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:01,108 INFO L85 PathProgramCache]: Analyzing trace with hash 298975739, now seen corresponding path program 1 times [2021-11-23 17:15:01,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:01,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522590216] [2021-11-23 17:15:01,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:01,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:01,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:01,132 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:01,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:15:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:01,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 17:15:01,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:01,448 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 17:15:01,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:01,449 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:01,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522590216] [2021-11-23 17:15:01,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522590216] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:01,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:01,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:15:01,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665604064] [2021-11-23 17:15:01,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:01,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 17:15:01,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:01,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 17:15:01,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:15:01,493 INFO L87 Difference]: Start difference. First operand has 137 states, 135 states have (on average 1.7481481481481482) internal successors, (236), 136 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) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:01,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:01,530 INFO L93 Difference]: Finished difference Result 214 states and 367 transitions. [2021-11-23 17:15:01,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 17:15:01,532 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-23 17:15:01,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:01,546 INFO L225 Difference]: With dead ends: 214 [2021-11-23 17:15:01,547 INFO L226 Difference]: Without dead ends: 133 [2021-11-23 17:15:01,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:15:01,555 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:01,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:15:01,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-23 17:15:01,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-11-23 17:15:01,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.7348484848484849) internal successors, (229), 132 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:01,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 229 transitions. [2021-11-23 17:15:01,613 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 229 transitions. Word has length 37 [2021-11-23 17:15:01,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:01,614 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 229 transitions. [2021-11-23 17:15:01,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:01,614 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 229 transitions. [2021-11-23 17:15:01,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 17:15:01,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:01,618 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:15:01,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:01,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:01,847 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:01,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:01,848 INFO L85 PathProgramCache]: Analyzing trace with hash -518672711, now seen corresponding path program 1 times [2021-11-23 17:15:01,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:01,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190301556] [2021-11-23 17:15:01,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:01,849 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:01,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:01,851 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:01,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:15:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:01,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:15:01,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:02,152 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 17:15:02,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:02,153 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:02,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190301556] [2021-11-23 17:15:02,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190301556] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:02,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:02,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:15:02,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850027567] [2021-11-23 17:15:02,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:02,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:15:02,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:02,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:15:02,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:15:02,159 INFO L87 Difference]: Start difference. First operand 133 states and 229 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:02,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:02,315 INFO L93 Difference]: Finished difference Result 213 states and 360 transitions. [2021-11-23 17:15:02,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:15:02,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-23 17:15:02,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:02,323 INFO L225 Difference]: With dead ends: 213 [2021-11-23 17:15:02,323 INFO L226 Difference]: Without dead ends: 133 [2021-11-23 17:15:02,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:15:02,326 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 3 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:02,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 878 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:15:02,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-23 17:15:02,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-11-23 17:15:02,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.5303030303030303) internal successors, (202), 132 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:02,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 202 transitions. [2021-11-23 17:15:02,355 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 202 transitions. Word has length 37 [2021-11-23 17:15:02,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:02,356 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 202 transitions. [2021-11-23 17:15:02,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:02,356 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 202 transitions. [2021-11-23 17:15:02,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 17:15:02,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:02,366 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:15:02,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:02,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:02,579 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:02,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:02,580 INFO L85 PathProgramCache]: Analyzing trace with hash -707453694, now seen corresponding path program 1 times [2021-11-23 17:15:02,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:02,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1515046348] [2021-11-23 17:15:02,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:02,581 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:02,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:02,583 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:02,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:15:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:02,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:15:02,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:02,905 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 17:15:02,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:02,906 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:02,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1515046348] [2021-11-23 17:15:02,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1515046348] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:02,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:02,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:15:02,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529986994] [2021-11-23 17:15:02,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:02,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:15:02,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:02,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:15:02,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:15:02,912 INFO L87 Difference]: Start difference. First operand 133 states and 202 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:02,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:02,975 INFO L93 Difference]: Finished difference Result 276 states and 439 transitions. [2021-11-23 17:15:02,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:15:02,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-23 17:15:02,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:02,983 INFO L225 Difference]: With dead ends: 276 [2021-11-23 17:15:02,984 INFO L226 Difference]: Without dead ends: 200 [2021-11-23 17:15:02,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 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 17:15:02,989 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 101 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:02,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 355 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:15:02,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-23 17:15:03,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 197. [2021-11-23 17:15:03,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.5510204081632653) internal successors, (304), 196 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:03,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 304 transitions. [2021-11-23 17:15:03,027 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 304 transitions. Word has length 63 [2021-11-23 17:15:03,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:03,028 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 304 transitions. [2021-11-23 17:15:03,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:03,028 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 304 transitions. [2021-11-23 17:15:03,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 17:15:03,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:03,040 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, 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 17:15:03,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:03,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:03,256 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:03,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:03,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1995563601, now seen corresponding path program 1 times [2021-11-23 17:15:03,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:03,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428234077] [2021-11-23 17:15:03,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:03,258 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:03,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:03,262 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:03,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:15:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:03,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:15:03,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:03,605 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 17:15:03,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:03,605 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:03,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428234077] [2021-11-23 17:15:03,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428234077] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:03,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:03,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:15:03,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464975032] [2021-11-23 17:15:03,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:03,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:15:03,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:03,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:15:03,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:15:03,610 INFO L87 Difference]: Start difference. First operand 197 states and 304 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:03,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:03,667 INFO L93 Difference]: Finished difference Result 570 states and 877 transitions. [2021-11-23 17:15:03,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:15:03,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-23 17:15:03,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:03,671 INFO L225 Difference]: With dead ends: 570 [2021-11-23 17:15:03,671 INFO L226 Difference]: Without dead ends: 382 [2021-11-23 17:15:03,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 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 17:15:03,674 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 442 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:03,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 459 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:15:03,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-23 17:15:03,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 380. [2021-11-23 17:15:03,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 1.5329815303430079) internal successors, (581), 379 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:03,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 581 transitions. [2021-11-23 17:15:03,697 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 581 transitions. Word has length 65 [2021-11-23 17:15:03,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:03,698 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 581 transitions. [2021-11-23 17:15:03,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:03,698 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 581 transitions. [2021-11-23 17:15:03,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 17:15:03,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:03,700 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, 1, 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 17:15:03,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:03,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:03,912 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:03,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:03,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1513197725, now seen corresponding path program 1 times [2021-11-23 17:15:03,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:03,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974367923] [2021-11-23 17:15:03,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:03,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:03,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:03,915 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:03,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:15:04,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:04,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:15:04,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:04,158 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 17:15:04,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:04,159 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:04,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974367923] [2021-11-23 17:15:04,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974367923] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:04,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:04,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:15:04,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281312650] [2021-11-23 17:15:04,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:04,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:15:04,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:04,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:15:04,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:15:04,161 INFO L87 Difference]: Start difference. First operand 380 states and 581 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:04,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:04,193 INFO L93 Difference]: Finished difference Result 1102 states and 1681 transitions. [2021-11-23 17:15:04,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:15:04,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-23 17:15:04,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:04,199 INFO L225 Difference]: With dead ends: 1102 [2021-11-23 17:15:04,199 INFO L226 Difference]: Without dead ends: 750 [2021-11-23 17:15:04,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 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 17:15:04,203 INFO L933 BasicCegarLoop]: 378 mSDtfsCounter, 191 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:04,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 571 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:15:04,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-11-23 17:15:04,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 382. [2021-11-23 17:15:04,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 1.5301837270341208) internal successors, (583), 381 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:04,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 583 transitions. [2021-11-23 17:15:04,230 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 583 transitions. Word has length 66 [2021-11-23 17:15:04,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:04,230 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 583 transitions. [2021-11-23 17:15:04,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:04,231 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 583 transitions. [2021-11-23 17:15:04,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 17:15:04,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:04,232 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, 1, 1, 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 17:15:04,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:04,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:04,445 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:04,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:04,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1354913580, now seen corresponding path program 1 times [2021-11-23 17:15:04,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:04,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [849527661] [2021-11-23 17:15:04,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:04,447 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:04,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:04,448 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:04,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:15:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:04,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:15:04,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:04,757 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 17:15:04,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:04,758 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:04,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [849527661] [2021-11-23 17:15:04,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [849527661] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:04,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:04,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:15:04,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494171179] [2021-11-23 17:15:04,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:04,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:15:04,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:04,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:15:04,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:15:04,760 INFO L87 Difference]: Start difference. First operand 382 states and 583 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:04,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:04,832 INFO L93 Difference]: Finished difference Result 1108 states and 1691 transitions. [2021-11-23 17:15:04,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:15:04,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-23 17:15:04,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:04,838 INFO L225 Difference]: With dead ends: 1108 [2021-11-23 17:15:04,839 INFO L226 Difference]: Without dead ends: 738 [2021-11-23 17:15:04,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 64 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 17:15:04,841 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 496 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:04,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 398 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:15:04,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2021-11-23 17:15:04,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 736. [2021-11-23 17:15:04,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 1.5142857142857142) internal successors, (1113), 735 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:04,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1113 transitions. [2021-11-23 17:15:04,885 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1113 transitions. Word has length 67 [2021-11-23 17:15:04,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:04,885 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 1113 transitions. [2021-11-23 17:15:04,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:04,886 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1113 transitions. [2021-11-23 17:15:04,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 17:15:04,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:04,891 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, 1, 1, 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 17:15:04,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:05,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:05,097 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:05,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:05,097 INFO L85 PathProgramCache]: Analyzing trace with hash 250813282, now seen corresponding path program 1 times [2021-11-23 17:15:05,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:05,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345500499] [2021-11-23 17:15:05,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:05,098 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:05,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:05,099 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:05,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:15:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:05,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:15:05,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:05,403 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 17:15:05,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:05,403 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:05,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345500499] [2021-11-23 17:15:05,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345500499] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:05,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:05,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:15:05,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912856957] [2021-11-23 17:15:05,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:05,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:15:05,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:05,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:15:05,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:15:05,409 INFO L87 Difference]: Start difference. First operand 736 states and 1113 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:05,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:05,457 INFO L93 Difference]: Finished difference Result 1260 states and 1983 transitions. [2021-11-23 17:15:05,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:15:05,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-23 17:15:05,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:05,468 INFO L225 Difference]: With dead ends: 1260 [2021-11-23 17:15:05,468 INFO L226 Difference]: Without dead ends: 970 [2021-11-23 17:15:05,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 65 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 17:15:05,470 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 108 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:05,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 465 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:15:05,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2021-11-23 17:15:05,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2021-11-23 17:15:05,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 967 states have (on average 1.5439503619441572) internal successors, (1493), 967 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:05,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1493 transitions. [2021-11-23 17:15:05,536 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1493 transitions. Word has length 67 [2021-11-23 17:15:05,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:05,536 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 1493 transitions. [2021-11-23 17:15:05,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:05,537 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1493 transitions. [2021-11-23 17:15:05,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 17:15:05,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:05,539 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, 1, 1, 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 17:15:05,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:05,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:05,752 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:05,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:05,753 INFO L85 PathProgramCache]: Analyzing trace with hash 645267773, now seen corresponding path program 1 times [2021-11-23 17:15:05,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:05,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1481446037] [2021-11-23 17:15:05,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:05,754 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:05,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:05,755 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:05,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:15:05,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:05,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:15:05,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:06,006 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 17:15:06,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:06,007 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:06,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1481446037] [2021-11-23 17:15:06,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1481446037] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:06,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:06,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:15:06,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007919897] [2021-11-23 17:15:06,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:06,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:15:06,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:06,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:15:06,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:15:06,010 INFO L87 Difference]: Start difference. First operand 968 states and 1493 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:06,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:06,066 INFO L93 Difference]: Finished difference Result 1686 states and 2595 transitions. [2021-11-23 17:15:06,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:15:06,066 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-23 17:15:06,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:06,072 INFO L225 Difference]: With dead ends: 1686 [2021-11-23 17:15:06,072 INFO L226 Difference]: Without dead ends: 734 [2021-11-23 17:15:06,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 64 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 17:15:06,075 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 69 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:06,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 637 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:15:06,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-11-23 17:15:06,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 734. [2021-11-23 17:15:06,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 1.534788540245566) internal successors, (1125), 733 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:06,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1125 transitions. [2021-11-23 17:15:06,121 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1125 transitions. Word has length 67 [2021-11-23 17:15:06,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:06,122 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 1125 transitions. [2021-11-23 17:15:06,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:06,122 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1125 transitions. [2021-11-23 17:15:06,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 17:15:06,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:06,124 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, 1, 1, 1, 1, 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 17:15:06,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:06,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:06,336 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:06,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:06,336 INFO L85 PathProgramCache]: Analyzing trace with hash -204580719, now seen corresponding path program 1 times [2021-11-23 17:15:06,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:06,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [909646028] [2021-11-23 17:15:06,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:06,338 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:06,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:06,339 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:06,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:15:06,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:06,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:15:06,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:06,617 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 17:15:06,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:06,617 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:06,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [909646028] [2021-11-23 17:15:06,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [909646028] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:06,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:06,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:15:06,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898275144] [2021-11-23 17:15:06,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:06,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:15:06,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:06,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:15:06,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:15:06,620 INFO L87 Difference]: Start difference. First operand 734 states and 1125 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:06,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:06,707 INFO L93 Difference]: Finished difference Result 1820 states and 2878 transitions. [2021-11-23 17:15:06,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:15:06,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-23 17:15:06,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:06,716 INFO L225 Difference]: With dead ends: 1820 [2021-11-23 17:15:06,716 INFO L226 Difference]: Without dead ends: 1247 [2021-11-23 17:15:06,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 67 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 17:15:06,720 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 99 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:06,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 363 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:15:06,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-11-23 17:15:06,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1236. [2021-11-23 17:15:06,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 1.5554655870445344) internal successors, (1921), 1235 states have internal predecessors, (1921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:06,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1921 transitions. [2021-11-23 17:15:06,790 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1921 transitions. Word has length 69 [2021-11-23 17:15:06,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:06,792 INFO L470 AbstractCegarLoop]: Abstraction has 1236 states and 1921 transitions. [2021-11-23 17:15:06,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:06,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1921 transitions. [2021-11-23 17:15:06,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 17:15:06,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:06,794 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, 1, 1, 1, 1, 1, 1, 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 17:15:06,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:07,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:07,005 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:07,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:07,006 INFO L85 PathProgramCache]: Analyzing trace with hash 943110016, now seen corresponding path program 1 times [2021-11-23 17:15:07,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:07,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [427531207] [2021-11-23 17:15:07,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:07,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:07,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:07,008 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:07,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:15:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:07,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:15:07,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:07,282 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 17:15:07,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:07,282 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:07,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [427531207] [2021-11-23 17:15:07,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [427531207] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:07,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:07,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:15:07,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300558749] [2021-11-23 17:15:07,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:07,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:15:07,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:07,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:15:07,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:15:07,285 INFO L87 Difference]: Start difference. First operand 1236 states and 1921 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:07,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:07,411 INFO L93 Difference]: Finished difference Result 3605 states and 5604 transitions. [2021-11-23 17:15:07,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:15:07,412 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-11-23 17:15:07,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:07,428 INFO L225 Difference]: With dead ends: 3605 [2021-11-23 17:15:07,429 INFO L226 Difference]: Without dead ends: 2404 [2021-11-23 17:15:07,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 68 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 17:15:07,432 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 403 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:07,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 451 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:15:07,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-11-23 17:15:07,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 2402. [2021-11-23 17:15:07,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2402 states, 2401 states have (on average 1.5435235318617242) internal successors, (3706), 2401 states have internal predecessors, (3706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:07,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 3706 transitions. [2021-11-23 17:15:07,595 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 3706 transitions. Word has length 71 [2021-11-23 17:15:07,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:07,595 INFO L470 AbstractCegarLoop]: Abstraction has 2402 states and 3706 transitions. [2021-11-23 17:15:07,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:07,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 3706 transitions. [2021-11-23 17:15:07,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 17:15:07,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:07,598 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, 1, 1, 1, 1, 1, 1, 1, 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 17:15:07,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:07,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:07,809 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:07,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:07,810 INFO L85 PathProgramCache]: Analyzing trace with hash -855715676, now seen corresponding path program 1 times [2021-11-23 17:15:07,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:07,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099807385] [2021-11-23 17:15:07,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:07,811 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:07,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:07,812 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:07,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:15:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:07,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:15:07,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:08,012 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 17:15:08,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:08,013 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:08,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099807385] [2021-11-23 17:15:08,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099807385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:08,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:08,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:15:08,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125436618] [2021-11-23 17:15:08,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:08,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:15:08,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:08,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:15:08,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:15:08,015 INFO L87 Difference]: Start difference. First operand 2402 states and 3706 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:08,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:08,212 INFO L93 Difference]: Finished difference Result 7112 states and 10977 transitions. [2021-11-23 17:15:08,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:15:08,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-11-23 17:15:08,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:08,238 INFO L225 Difference]: With dead ends: 7112 [2021-11-23 17:15:08,238 INFO L226 Difference]: Without dead ends: 4766 [2021-11-23 17:15:08,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 70 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 17:15:08,243 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 177 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:08,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 551 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:15:08,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4766 states. [2021-11-23 17:15:08,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4766 to 2408. [2021-11-23 17:15:08,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2407 states have (on average 1.5421686746987953) internal successors, (3712), 2407 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:08,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 3712 transitions. [2021-11-23 17:15:08,402 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 3712 transitions. Word has length 72 [2021-11-23 17:15:08,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:08,402 INFO L470 AbstractCegarLoop]: Abstraction has 2408 states and 3712 transitions. [2021-11-23 17:15:08,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:08,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 3712 transitions. [2021-11-23 17:15:08,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 17:15:08,405 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:08,405 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:15:08,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:08,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:08,617 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:08,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:08,617 INFO L85 PathProgramCache]: Analyzing trace with hash -284007429, now seen corresponding path program 1 times [2021-11-23 17:15:08,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:08,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677499115] [2021-11-23 17:15:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:08,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:08,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:08,619 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:08,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:15:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:08,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:15:08,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:08,897 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 17:15:08,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:08,898 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:08,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [677499115] [2021-11-23 17:15:08,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [677499115] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:08,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:08,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:15:08,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801932441] [2021-11-23 17:15:08,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:08,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:15:08,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:08,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:15:08,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:15:08,902 INFO L87 Difference]: Start difference. First operand 2408 states and 3712 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:09,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:09,170 INFO L93 Difference]: Finished difference Result 7030 states and 10833 transitions. [2021-11-23 17:15:09,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:15:09,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-23 17:15:09,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:09,203 INFO L225 Difference]: With dead ends: 7030 [2021-11-23 17:15:09,203 INFO L226 Difference]: Without dead ends: 4663 [2021-11-23 17:15:09,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 70 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 17:15:09,209 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 410 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:09,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 443 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:15:09,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4663 states. [2021-11-23 17:15:09,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4663 to 4661. [2021-11-23 17:15:09,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4661 states, 4660 states have (on average 1.5240343347639485) internal successors, (7102), 4660 states have internal predecessors, (7102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:09,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4661 states to 4661 states and 7102 transitions. [2021-11-23 17:15:09,564 INFO L78 Accepts]: Start accepts. Automaton has 4661 states and 7102 transitions. Word has length 73 [2021-11-23 17:15:09,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:09,565 INFO L470 AbstractCegarLoop]: Abstraction has 4661 states and 7102 transitions. [2021-11-23 17:15:09,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:09,565 INFO L276 IsEmpty]: Start isEmpty. Operand 4661 states and 7102 transitions. [2021-11-23 17:15:09,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 17:15:09,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:09,570 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:15:09,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:09,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:09,789 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:09,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:09,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1854441068, now seen corresponding path program 1 times [2021-11-23 17:15:09,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:09,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1634879478] [2021-11-23 17:15:09,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:09,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:09,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:09,792 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:09,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:15:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:09,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:15:09,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:10,050 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 17:15:10,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:10,050 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:10,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1634879478] [2021-11-23 17:15:10,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1634879478] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:10,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:10,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:15:10,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879564147] [2021-11-23 17:15:10,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:10,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:15:10,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:10,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:15:10,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:15:10,053 INFO L87 Difference]: Start difference. First operand 4661 states and 7102 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:10,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:10,280 INFO L93 Difference]: Finished difference Result 8161 states and 12411 transitions. [2021-11-23 17:15:10,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:15:10,281 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-23 17:15:10,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:10,306 INFO L225 Difference]: With dead ends: 8161 [2021-11-23 17:15:10,306 INFO L226 Difference]: Without dead ends: 3549 [2021-11-23 17:15:10,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 70 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 17:15:10,314 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 47 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:10,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 616 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:15:10,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3549 states. [2021-11-23 17:15:10,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3549 to 3548. [2021-11-23 17:15:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3548 states, 3547 states have (on average 1.514801240484917) internal successors, (5373), 3547 states have internal predecessors, (5373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:10,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3548 states to 3548 states and 5373 transitions. [2021-11-23 17:15:10,540 INFO L78 Accepts]: Start accepts. Automaton has 3548 states and 5373 transitions. Word has length 73 [2021-11-23 17:15:10,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:10,540 INFO L470 AbstractCegarLoop]: Abstraction has 3548 states and 5373 transitions. [2021-11-23 17:15:10,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:10,541 INFO L276 IsEmpty]: Start isEmpty. Operand 3548 states and 5373 transitions. [2021-11-23 17:15:10,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 17:15:10,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:10,569 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:15:10,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:10,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:10,770 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:10,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:10,771 INFO L85 PathProgramCache]: Analyzing trace with hash 929604699, now seen corresponding path program 1 times [2021-11-23 17:15:10,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:10,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378993470] [2021-11-23 17:15:10,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:10,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:10,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:10,773 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:10,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:15:10,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:10,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:15:10,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:11,028 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 17:15:11,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:11,029 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:11,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378993470] [2021-11-23 17:15:11,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [378993470] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:11,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:11,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:15:11,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386865890] [2021-11-23 17:15:11,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:11,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:15:11,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:11,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:15:11,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:15:11,032 INFO L87 Difference]: Start difference. First operand 3548 states and 5373 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:11,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:11,287 INFO L93 Difference]: Finished difference Result 6555 states and 10124 transitions. [2021-11-23 17:15:11,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:15:11,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-23 17:15:11,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:11,341 INFO L225 Difference]: With dead ends: 6555 [2021-11-23 17:15:11,341 INFO L226 Difference]: Without dead ends: 4879 [2021-11-23 17:15:11,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 71 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 17:15:11,366 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 100 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:11,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 448 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:15:11,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2021-11-23 17:15:11,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 4877. [2021-11-23 17:15:11,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4877 states, 4876 states have (on average 1.5239950779327318) internal successors, (7431), 4876 states have internal predecessors, (7431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:11,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4877 states to 4877 states and 7431 transitions. [2021-11-23 17:15:11,657 INFO L78 Accepts]: Start accepts. Automaton has 4877 states and 7431 transitions. Word has length 73 [2021-11-23 17:15:11,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:11,657 INFO L470 AbstractCegarLoop]: Abstraction has 4877 states and 7431 transitions. [2021-11-23 17:15:11,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:11,658 INFO L276 IsEmpty]: Start isEmpty. Operand 4877 states and 7431 transitions. [2021-11-23 17:15:11,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 17:15:11,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:11,662 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:15:11,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:11,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:11,876 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:11,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:11,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1991018750, now seen corresponding path program 1 times [2021-11-23 17:15:11,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:11,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355828328] [2021-11-23 17:15:11,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:11,877 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:11,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:11,878 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:11,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:15:11,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:11,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:15:12,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:12,855 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 17:15:12,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:12,855 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:12,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355828328] [2021-11-23 17:15:12,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355828328] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:12,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:12,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:15:12,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994540489] [2021-11-23 17:15:12,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:12,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:15:12,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:12,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:15:12,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:15:12,858 INFO L87 Difference]: Start difference. First operand 4877 states and 7431 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:13,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:13,160 INFO L93 Difference]: Finished difference Result 7958 states and 12216 transitions. [2021-11-23 17:15:13,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:15:13,160 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-23 17:15:13,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:13,173 INFO L225 Difference]: With dead ends: 7958 [2021-11-23 17:15:13,174 INFO L226 Difference]: Without dead ends: 5013 [2021-11-23 17:15:13,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:15:13,180 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 113 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:13,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 561 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 36 Unchecked, 0.0s Time] [2021-11-23 17:15:13,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5013 states. [2021-11-23 17:15:13,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5013 to 4970. [2021-11-23 17:15:13,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4970 states, 4969 states have (on average 1.5178104246327229) internal successors, (7542), 4969 states have internal predecessors, (7542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:13,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4970 states to 4970 states and 7542 transitions. [2021-11-23 17:15:13,461 INFO L78 Accepts]: Start accepts. Automaton has 4970 states and 7542 transitions. Word has length 75 [2021-11-23 17:15:13,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:13,461 INFO L470 AbstractCegarLoop]: Abstraction has 4970 states and 7542 transitions. [2021-11-23 17:15:13,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:13,462 INFO L276 IsEmpty]: Start isEmpty. Operand 4970 states and 7542 transitions. [2021-11-23 17:15:13,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 17:15:13,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:13,466 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:15:13,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:13,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:13,680 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:13,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:13,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1404212736, now seen corresponding path program 1 times [2021-11-23 17:15:13,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:13,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735643761] [2021-11-23 17:15:13,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:13,681 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:13,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:13,683 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:13,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 17:15:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:13,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:15:13,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:13,990 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 17:15:13,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:13,990 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:13,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735643761] [2021-11-23 17:15:13,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735643761] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:13,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:13,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:15:13,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895957121] [2021-11-23 17:15:13,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:13,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:15:13,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:13,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:15:13,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:15:13,993 INFO L87 Difference]: Start difference. First operand 4970 states and 7542 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:14,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:14,424 INFO L93 Difference]: Finished difference Result 13209 states and 20423 transitions. [2021-11-23 17:15:14,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:15:14,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-23 17:15:14,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:14,485 INFO L225 Difference]: With dead ends: 13209 [2021-11-23 17:15:14,486 INFO L226 Difference]: Without dead ends: 8833 [2021-11-23 17:15:14,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 73 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 17:15:14,493 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 89 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:14,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 359 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:15:14,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8833 states. [2021-11-23 17:15:14,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8833 to 8750. [2021-11-23 17:15:14,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8750 states, 8749 states have (on average 1.5224597096811063) internal successors, (13320), 8749 states have internal predecessors, (13320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:14,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8750 states to 8750 states and 13320 transitions. [2021-11-23 17:15:14,923 INFO L78 Accepts]: Start accepts. Automaton has 8750 states and 13320 transitions. Word has length 75 [2021-11-23 17:15:14,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:14,924 INFO L470 AbstractCegarLoop]: Abstraction has 8750 states and 13320 transitions. [2021-11-23 17:15:14,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:14,924 INFO L276 IsEmpty]: Start isEmpty. Operand 8750 states and 13320 transitions. [2021-11-23 17:15:14,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 17:15:14,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:14,927 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:15:14,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-23 17:15:15,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:15,139 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:15,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:15,140 INFO L85 PathProgramCache]: Analyzing trace with hash -637855089, now seen corresponding path program 1 times [2021-11-23 17:15:15,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:15,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [452904698] [2021-11-23 17:15:15,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:15,141 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:15,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:15,142 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:15,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 17:15:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:15,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:15:15,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:15,470 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 17:15:15,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:15,471 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:15,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [452904698] [2021-11-23 17:15:15,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [452904698] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:15,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:15,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:15:15,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375489265] [2021-11-23 17:15:15,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:15,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:15:15,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:15,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:15:15,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:15:15,474 INFO L87 Difference]: Start difference. First operand 8750 states and 13320 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:16,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:16,108 INFO L93 Difference]: Finished difference Result 22959 states and 34940 transitions. [2021-11-23 17:15:16,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:15:16,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-23 17:15:16,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:16,148 INFO L225 Difference]: With dead ends: 22959 [2021-11-23 17:15:16,148 INFO L226 Difference]: Without dead ends: 14296 [2021-11-23 17:15:16,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 17:15:16,162 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 380 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:16,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 430 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:15:16,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14296 states. [2021-11-23 17:15:16,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14296 to 14294. [2021-11-23 17:15:16,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14294 states, 14293 states have (on average 1.5050024487511369) internal successors, (21511), 14293 states have internal predecessors, (21511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:16,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14294 states to 14294 states and 21511 transitions. [2021-11-23 17:15:16,980 INFO L78 Accepts]: Start accepts. Automaton has 14294 states and 21511 transitions. Word has length 77 [2021-11-23 17:15:16,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:16,981 INFO L470 AbstractCegarLoop]: Abstraction has 14294 states and 21511 transitions. [2021-11-23 17:15:16,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:16,981 INFO L276 IsEmpty]: Start isEmpty. Operand 14294 states and 21511 transitions. [2021-11-23 17:15:16,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-23 17:15:16,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:16,987 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:15:17,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:17,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:17,204 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:17,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:17,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1813022347, now seen corresponding path program 1 times [2021-11-23 17:15:17,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:17,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503218784] [2021-11-23 17:15:17,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:17,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:17,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:17,206 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:17,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 17:15:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:17,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:15:17,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:17,457 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 17:15:17,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:17,458 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:17,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503218784] [2021-11-23 17:15:17,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503218784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:17,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:17,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:15:17,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870856116] [2021-11-23 17:15:17,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:17,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:15:17,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:17,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:15:17,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:15:17,461 INFO L87 Difference]: Start difference. First operand 14294 states and 21511 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:18,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:18,332 INFO L93 Difference]: Finished difference Result 39468 states and 59573 transitions. [2021-11-23 17:15:18,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:15:18,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-11-23 17:15:18,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:18,423 INFO L225 Difference]: With dead ends: 39468 [2021-11-23 17:15:18,423 INFO L226 Difference]: Without dead ends: 28471 [2021-11-23 17:15:18,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 76 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 17:15:18,443 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 163 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:18,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 541 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:15:18,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28471 states. [2021-11-23 17:15:19,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28471 to 14306. [2021-11-23 17:15:19,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14306 states, 14305 states have (on average 1.504578818594897) internal successors, (21523), 14305 states have internal predecessors, (21523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:19,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14306 states to 14306 states and 21523 transitions. [2021-11-23 17:15:19,416 INFO L78 Accepts]: Start accepts. Automaton has 14306 states and 21523 transitions. Word has length 78 [2021-11-23 17:15:19,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:19,416 INFO L470 AbstractCegarLoop]: Abstraction has 14306 states and 21523 transitions. [2021-11-23 17:15:19,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:19,417 INFO L276 IsEmpty]: Start isEmpty. Operand 14306 states and 21523 transitions. [2021-11-23 17:15:19,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 17:15:19,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:19,425 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:15:19,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:19,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:19,646 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:19,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:19,646 INFO L85 PathProgramCache]: Analyzing trace with hash -2063550806, now seen corresponding path program 1 times [2021-11-23 17:15:19,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:19,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733496724] [2021-11-23 17:15:19,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:19,647 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:19,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:19,648 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:19,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 17:15:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:19,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:15:19,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:20,009 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 17:15:20,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:20,010 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:20,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733496724] [2021-11-23 17:15:20,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733496724] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:20,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:20,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:15:20,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14918716] [2021-11-23 17:15:20,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:20,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:15:20,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:20,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:15:20,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:15:20,012 INFO L87 Difference]: Start difference. First operand 14306 states and 21523 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:21,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:21,054 INFO L93 Difference]: Finished difference Result 37507 states and 56437 transitions. [2021-11-23 17:15:21,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:15:21,054 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-23 17:15:21,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:21,113 INFO L225 Difference]: With dead ends: 37507 [2021-11-23 17:15:21,113 INFO L226 Difference]: Without dead ends: 23373 [2021-11-23 17:15:21,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 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 17:15:21,135 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 395 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:21,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 427 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:15:21,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23373 states. [2021-11-23 17:15:22,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23373 to 23371. [2021-11-23 17:15:22,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23371 states, 23370 states have (on average 1.4872058194266153) internal successors, (34756), 23370 states have internal predecessors, (34756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:22,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23371 states to 23371 states and 34756 transitions. [2021-11-23 17:15:22,567 INFO L78 Accepts]: Start accepts. Automaton has 23371 states and 34756 transitions. Word has length 79 [2021-11-23 17:15:22,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:22,570 INFO L470 AbstractCegarLoop]: Abstraction has 23371 states and 34756 transitions. [2021-11-23 17:15:22,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:22,570 INFO L276 IsEmpty]: Start isEmpty. Operand 23371 states and 34756 transitions. [2021-11-23 17:15:22,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 17:15:22,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:22,582 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:15:22,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:22,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:22,802 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:22,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:22,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1594467973, now seen corresponding path program 1 times [2021-11-23 17:15:22,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:22,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131844625] [2021-11-23 17:15:22,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:22,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:22,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:22,806 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:22,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 17:15:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:22,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:15:22,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:23,043 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 17:15:23,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:23,044 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:23,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1131844625] [2021-11-23 17:15:23,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1131844625] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:23,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:23,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:15:23,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206290724] [2021-11-23 17:15:23,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:23,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:15:23,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:23,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:15:23,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:15:23,046 INFO L87 Difference]: Start difference. First operand 23371 states and 34756 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:23,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:23,862 INFO L93 Difference]: Finished difference Result 34239 states and 51041 transitions. [2021-11-23 17:15:23,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:15:23,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-23 17:15:23,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:23,905 INFO L225 Difference]: With dead ends: 34239 [2021-11-23 17:15:23,905 INFO L226 Difference]: Without dead ends: 19817 [2021-11-23 17:15:23,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 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 17:15:23,926 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 21 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:23,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 589 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:15:23,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19817 states. [2021-11-23 17:15:24,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19817 to 19817. [2021-11-23 17:15:24,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19817 states, 19816 states have (on average 1.482438433589019) internal successors, (29376), 19816 states have internal predecessors, (29376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:24,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19817 states to 19817 states and 29376 transitions. [2021-11-23 17:15:24,952 INFO L78 Accepts]: Start accepts. Automaton has 19817 states and 29376 transitions. Word has length 79 [2021-11-23 17:15:24,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:24,953 INFO L470 AbstractCegarLoop]: Abstraction has 19817 states and 29376 transitions. [2021-11-23 17:15:24,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:24,953 INFO L276 IsEmpty]: Start isEmpty. Operand 19817 states and 29376 transitions. [2021-11-23 17:15:24,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 17:15:24,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:24,960 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:15:24,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:25,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:25,174 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:25,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:25,175 INFO L85 PathProgramCache]: Analyzing trace with hash 866808516, now seen corresponding path program 1 times [2021-11-23 17:15:25,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:25,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46285170] [2021-11-23 17:15:25,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:25,176 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:25,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:25,177 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:25,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 17:15:25,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:25,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:15:25,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:25,439 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 17:15:25,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:25,439 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:25,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46285170] [2021-11-23 17:15:25,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46285170] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:25,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:25,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:15:25,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664806590] [2021-11-23 17:15:25,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:25,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:15:25,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:25,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:15:25,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:15:25,443 INFO L87 Difference]: Start difference. First operand 19817 states and 29376 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:26,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:26,115 INFO L93 Difference]: Finished difference Result 31958 states and 47421 transitions. [2021-11-23 17:15:26,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:15:26,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-23 17:15:26,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:26,147 INFO L225 Difference]: With dead ends: 31958 [2021-11-23 17:15:26,147 INFO L226 Difference]: Without dead ends: 17083 [2021-11-23 17:15:26,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 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 17:15:26,165 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 43 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:26,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 596 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:15:26,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17083 states. [2021-11-23 17:15:27,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17083 to 17083. [2021-11-23 17:15:27,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17083 states, 17082 states have (on average 1.479393513640089) internal successors, (25271), 17082 states have internal predecessors, (25271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:27,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17083 states to 17083 states and 25271 transitions. [2021-11-23 17:15:27,216 INFO L78 Accepts]: Start accepts. Automaton has 17083 states and 25271 transitions. Word has length 79 [2021-11-23 17:15:27,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:27,217 INFO L470 AbstractCegarLoop]: Abstraction has 17083 states and 25271 transitions. [2021-11-23 17:15:27,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:27,217 INFO L276 IsEmpty]: Start isEmpty. Operand 17083 states and 25271 transitions. [2021-11-23 17:15:27,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 17:15:27,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:27,223 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:15:27,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-23 17:15:27,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:27,435 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:27,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:27,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1490465167, now seen corresponding path program 1 times [2021-11-23 17:15:27,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:27,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1968369135] [2021-11-23 17:15:27,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:27,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:27,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:27,437 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:27,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 17:15:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:27,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:15:27,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:27,697 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 17:15:27,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:27,698 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:27,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1968369135] [2021-11-23 17:15:27,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1968369135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:27,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:27,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:15:27,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351676031] [2021-11-23 17:15:27,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:27,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:15:27,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:27,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:15:27,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:15:27,700 INFO L87 Difference]: Start difference. First operand 17083 states and 25271 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:28,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:28,677 INFO L93 Difference]: Finished difference Result 32001 states and 48017 transitions. [2021-11-23 17:15:28,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:15:28,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-11-23 17:15:28,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:28,723 INFO L225 Difference]: With dead ends: 32001 [2021-11-23 17:15:28,723 INFO L226 Difference]: Without dead ends: 23371 [2021-11-23 17:15:28,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 78 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 17:15:28,733 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 90 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:28,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 423 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:15:28,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23371 states. [2021-11-23 17:15:29,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23371 to 23369. [2021-11-23 17:15:29,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23369 states, 23368 states have (on average 1.483695652173913) internal successors, (34671), 23368 states have internal predecessors, (34671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:29,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23369 states to 23369 states and 34671 transitions. [2021-11-23 17:15:29,887 INFO L78 Accepts]: Start accepts. Automaton has 23369 states and 34671 transitions. Word has length 80 [2021-11-23 17:15:29,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:29,888 INFO L470 AbstractCegarLoop]: Abstraction has 23369 states and 34671 transitions. [2021-11-23 17:15:29,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:29,888 INFO L276 IsEmpty]: Start isEmpty. Operand 23369 states and 34671 transitions. [2021-11-23 17:15:29,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-23 17:15:29,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:29,893 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:15:29,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:30,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:30,107 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:30,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:30,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1722522927, now seen corresponding path program 1 times [2021-11-23 17:15:30,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:30,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [190037459] [2021-11-23 17:15:30,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:30,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:30,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:30,109 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:30,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 17:15:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:30,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:15:30,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:30,752 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 17:15:30,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:30,752 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:30,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [190037459] [2021-11-23 17:15:30,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [190037459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:30,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:30,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:15:30,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202193738] [2021-11-23 17:15:30,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:30,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:15:30,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:30,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:15:30,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:15:30,754 INFO L87 Difference]: Start difference. First operand 23369 states and 34671 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:33,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:33,475 INFO L93 Difference]: Finished difference Result 89509 states and 135367 transitions. [2021-11-23 17:15:33,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:15:33,476 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-23 17:15:33,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:33,598 INFO L225 Difference]: With dead ends: 89509 [2021-11-23 17:15:33,598 INFO L226 Difference]: Without dead ends: 67367 [2021-11-23 17:15:33,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:15:33,620 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 477 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:33,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 771 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:15:33,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67367 states. [2021-11-23 17:15:36,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67367 to 57409. [2021-11-23 17:15:36,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57409 states, 57408 states have (on average 1.4837827480490524) internal successors, (85181), 57408 states have internal predecessors, (85181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:36,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57409 states to 57409 states and 85181 transitions. [2021-11-23 17:15:36,731 INFO L78 Accepts]: Start accepts. Automaton has 57409 states and 85181 transitions. Word has length 81 [2021-11-23 17:15:36,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:36,732 INFO L470 AbstractCegarLoop]: Abstraction has 57409 states and 85181 transitions. [2021-11-23 17:15:36,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:36,732 INFO L276 IsEmpty]: Start isEmpty. Operand 57409 states and 85181 transitions. [2021-11-23 17:15:36,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 17:15:36,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:36,737 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:15:36,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:36,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:36,949 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:36,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:36,950 INFO L85 PathProgramCache]: Analyzing trace with hash -64229439, now seen corresponding path program 1 times [2021-11-23 17:15:36,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:36,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1097990180] [2021-11-23 17:15:36,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:36,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:36,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:36,952 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:36,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 17:15:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:37,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:15:37,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:37,414 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 17:15:37,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:37,415 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:37,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1097990180] [2021-11-23 17:15:37,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1097990180] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:37,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:37,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:15:37,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095019620] [2021-11-23 17:15:37,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:37,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:15:37,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:37,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:15:37,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:15:37,417 INFO L87 Difference]: Start difference. First operand 57409 states and 85181 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:41,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:41,788 INFO L93 Difference]: Finished difference Result 158403 states and 237958 transitions. [2021-11-23 17:15:41,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:15:41,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-11-23 17:15:41,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:41,980 INFO L225 Difference]: With dead ends: 158403 [2021-11-23 17:15:41,980 INFO L226 Difference]: Without dead ends: 102221 [2021-11-23 17:15:42,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:15:42,025 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 355 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:42,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 464 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:15:42,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102221 states. [2021-11-23 17:15:46,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102221 to 91887. [2021-11-23 17:15:46,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91887 states, 91886 states have (on average 1.4873756611453322) internal successors, (136669), 91886 states have internal predecessors, (136669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:47,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91887 states to 91887 states and 136669 transitions. [2021-11-23 17:15:47,126 INFO L78 Accepts]: Start accepts. Automaton has 91887 states and 136669 transitions. Word has length 82 [2021-11-23 17:15:47,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:47,127 INFO L470 AbstractCegarLoop]: Abstraction has 91887 states and 136669 transitions. [2021-11-23 17:15:47,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:47,127 INFO L276 IsEmpty]: Start isEmpty. Operand 91887 states and 136669 transitions. [2021-11-23 17:15:47,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 17:15:47,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:47,132 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:15:47,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:47,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:47,345 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:47,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:47,346 INFO L85 PathProgramCache]: Analyzing trace with hash 550026406, now seen corresponding path program 1 times [2021-11-23 17:15:47,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:47,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1138364960] [2021-11-23 17:15:47,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:47,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:47,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:47,347 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:47,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b5512d-7a2f-46a1-bf0c-89f68a71d423/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 17:15:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:47,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:15:47,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:47,806 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 17:15:47,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:47,806 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:47,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1138364960] [2021-11-23 17:15:47,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1138364960] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:47,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:47,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:15:47,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646835196] [2021-11-23 17:15:47,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:47,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:15:47,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:47,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:15:47,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:15:47,809 INFO L87 Difference]: Start difference. First operand 91887 states and 136669 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:54,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:54,843 INFO L93 Difference]: Finished difference Result 243107 states and 363702 transitions. [2021-11-23 17:15:54,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:15:54,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-23 17:15:54,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:55,156 INFO L225 Difference]: With dead ends: 243107 [2021-11-23 17:15:55,156 INFO L226 Difference]: Without dead ends: 152447 [2021-11-23 17:15:55,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:15:55,223 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 353 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:55,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 462 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:15:55,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152447 states.