./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem02_label47.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem02_label47.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P --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 43942ed658f972c411b91910fdf7d6dc5f5d52e9f642b849efd1f112fd822a54 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:38:38,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:38:38,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:38:38,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:38:38,846 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:38:38,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:38:38,853 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:38:38,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:38:38,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:38:38,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:38:38,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:38:38,871 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:38:38,872 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:38:38,875 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:38:38,878 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:38:38,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:38:38,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:38:38,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:38:38,890 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:38:38,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:38:38,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:38:38,903 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:38:38,907 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:38:38,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:38:38,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:38:38,920 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:38:38,921 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:38:38,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:38:38,924 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:38:38,926 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:38:38,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:38:38,927 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:38:38,929 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:38:38,931 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:38:38,933 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:38:38,933 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:38:38,934 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:38:38,934 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:38:38,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:38:38,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:38:38,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:38:38,937 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:38:38,989 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:38:38,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:38:38,990 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:38:38,990 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:38:38,992 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:38:38,992 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:38:38,992 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:38:38,993 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:38:38,993 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:38:38,993 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:38:38,994 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:38:38,995 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:38:38,995 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:38:38,995 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:38:38,996 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:38:38,996 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:38:38,996 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:38:38,996 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:38:38,998 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:38:38,998 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:38:38,998 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:38:38,999 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:38:38,999 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:38:38,999 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:38:39,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:38:39,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:38:39,002 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:38:39,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:38:39,002 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:38:39,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:38:39,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:38:39,004 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:38:39,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:38:39,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:38:39,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:38:39,005 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:38:39,005 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:38:39,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:38:39,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:38:39,006 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:38:39,006 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:38:39,006 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_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43942ed658f972c411b91910fdf7d6dc5f5d52e9f642b849efd1f112fd822a54 [2021-11-21 00:38:39,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:38:39,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:38:39,377 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:38:39,379 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:38:39,379 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:38:39,381 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/eca-rers2012/Problem02_label47.c [2021-11-21 00:38:39,456 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/data/b59122592/84d44fc706f1437eab503ecf6123952f/FLAG3479ea72d [2021-11-21 00:38:40,102 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:38:40,105 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/sv-benchmarks/c/eca-rers2012/Problem02_label47.c [2021-11-21 00:38:40,125 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/data/b59122592/84d44fc706f1437eab503ecf6123952f/FLAG3479ea72d [2021-11-21 00:38:40,326 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/data/b59122592/84d44fc706f1437eab503ecf6123952f [2021-11-21 00:38:40,330 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:38:40,333 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:38:40,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:38:40,340 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:38:40,344 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:38:40,345 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:38:40" (1/1) ... [2021-11-21 00:38:40,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5184033f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:38:40, skipping insertion in model container [2021-11-21 00:38:40,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:38:40" (1/1) ... [2021-11-21 00:38:40,357 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:38:40,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:38:40,875 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_2fc5e906-109c-4ef0-b633-adc7d180105e/sv-benchmarks/c/eca-rers2012/Problem02_label47.c[17583,17596] [2021-11-21 00:38:40,906 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:38:40,914 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:38:41,016 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_2fc5e906-109c-4ef0-b633-adc7d180105e/sv-benchmarks/c/eca-rers2012/Problem02_label47.c[17583,17596] [2021-11-21 00:38:41,030 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:38:41,047 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:38:41,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:38:41 WrapperNode [2021-11-21 00:38:41,048 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:38:41,050 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:38:41,050 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:38:41,050 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:38:41,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:38:41" (1/1) ... [2021-11-21 00:38:41,083 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:38:41" (1/1) ... [2021-11-21 00:38:41,147 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 668 [2021-11-21 00:38:41,147 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:38:41,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:38:41,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:38:41,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:38:41,157 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:38:41" (1/1) ... [2021-11-21 00:38:41,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:38:41" (1/1) ... [2021-11-21 00:38:41,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:38:41" (1/1) ... [2021-11-21 00:38:41,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:38:41" (1/1) ... [2021-11-21 00:38:41,191 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:38:41" (1/1) ... [2021-11-21 00:38:41,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:38:41" (1/1) ... [2021-11-21 00:38:41,211 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:38:41" (1/1) ... [2021-11-21 00:38:41,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:38:41,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:38:41,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:38:41,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:38:41,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:38:41" (1/1) ... [2021-11-21 00:38:41,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:38:41,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:38:41,298 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:38:41,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:38:41,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:38:41,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:38:41,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:38:41,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:38:41,446 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:38:41,448 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:38:42,713 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:38:43,005 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:38:43,005 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 00:38:43,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:38:43 BoogieIcfgContainer [2021-11-21 00:38:43,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:38:43,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:38:43,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:38:43,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:38:43,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:38:40" (1/3) ... [2021-11-21 00:38:43,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fa82ba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:38:43, skipping insertion in model container [2021-11-21 00:38:43,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:38:41" (2/3) ... [2021-11-21 00:38:43,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fa82ba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:38:43, skipping insertion in model container [2021-11-21 00:38:43,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:38:43" (3/3) ... [2021-11-21 00:38:43,021 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem02_label47.c [2021-11-21 00:38:43,031 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:38:43,031 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:38:43,093 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:38:43,100 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 [2021-11-21 00:38:43,101 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:38:43,121 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 83 states have (on average 1.9518072289156627) internal successors, (162), 84 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:43,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-21 00:38:43,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:38:43,133 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] [2021-11-21 00:38:43,134 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:38:43,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:38:43,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1243324083, now seen corresponding path program 1 times [2021-11-21 00:38:43,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:38:43,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794179815] [2021-11-21 00:38:43,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:43,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:38:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:38:43,607 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:38:43,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794179815] [2021-11-21 00:38:43,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794179815] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:38:43,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:38:43,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:38:43,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244147531] [2021-11-21 00:38:43,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:38:43,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:38:43,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:38:43,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:38:43,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:38:43,667 INFO L87 Difference]: Start difference. First operand has 85 states, 83 states have (on average 1.9518072289156627) internal successors, (162), 84 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 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) [2021-11-21 00:38:44,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:38:44,222 INFO L93 Difference]: Finished difference Result 251 states and 482 transitions. [2021-11-21 00:38:44,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:38:44,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 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 [2021-11-21 00:38:44,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:38:44,243 INFO L225 Difference]: With dead ends: 251 [2021-11-21 00:38:44,243 INFO L226 Difference]: Without dead ends: 163 [2021-11-21 00:38:44,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:38:44,251 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:38:44,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 55 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 00:38:44,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-21 00:38:44,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-11-21 00:38:44,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.8395061728395061) internal successors, (298), 162 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:44,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 298 transitions. [2021-11-21 00:38:44,321 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 298 transitions. Word has length 80 [2021-11-21 00:38:44,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:38:44,322 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 298 transitions. [2021-11-21 00:38:44,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 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) [2021-11-21 00:38:44,323 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 298 transitions. [2021-11-21 00:38:44,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-21 00:38:44,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:38:44,328 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:38:44,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:38:44,328 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:38:44,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:38:44,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1833066152, now seen corresponding path program 1 times [2021-11-21 00:38:44,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:38:44,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202260102] [2021-11-21 00:38:44,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:44,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:38:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:44,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:38:44,447 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:38:44,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202260102] [2021-11-21 00:38:44,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202260102] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:38:44,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:38:44,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:38:44,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131701835] [2021-11-21 00:38:44,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:38:44,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:38:44,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:38:44,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:38:44,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:38:44,452 INFO L87 Difference]: Start difference. First operand 163 states and 298 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:44,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:38:44,891 INFO L93 Difference]: Finished difference Result 485 states and 891 transitions. [2021-11-21 00:38:44,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:38:44,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-11-21 00:38:44,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:38:44,896 INFO L225 Difference]: With dead ends: 485 [2021-11-21 00:38:44,896 INFO L226 Difference]: Without dead ends: 323 [2021-11-21 00:38:44,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:38:44,900 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 78 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:38:44,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 63 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:38:44,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-11-21 00:38:44,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2021-11-21 00:38:44,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.515527950310559) internal successors, (488), 322 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:44,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 488 transitions. [2021-11-21 00:38:44,924 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 488 transitions. Word has length 84 [2021-11-21 00:38:44,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:38:44,925 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 488 transitions. [2021-11-21 00:38:44,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:44,926 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 488 transitions. [2021-11-21 00:38:44,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-21 00:38:44,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:38:44,931 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:38:44,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:38:44,932 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:38:44,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:38:44,933 INFO L85 PathProgramCache]: Analyzing trace with hash -2045181971, now seen corresponding path program 1 times [2021-11-21 00:38:44,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:38:44,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137286891] [2021-11-21 00:38:44,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:44,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:38:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:38:44,999 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:38:44,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137286891] [2021-11-21 00:38:44,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137286891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:38:44,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:38:45,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:38:45,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241018610] [2021-11-21 00:38:45,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:38:45,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:38:45,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:38:45,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:38:45,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:38:45,002 INFO L87 Difference]: Start difference. First operand 323 states and 488 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:45,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:38:45,437 INFO L93 Difference]: Finished difference Result 805 states and 1271 transitions. [2021-11-21 00:38:45,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:38:45,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 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 89 [2021-11-21 00:38:45,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:38:45,441 INFO L225 Difference]: With dead ends: 805 [2021-11-21 00:38:45,441 INFO L226 Difference]: Without dead ends: 483 [2021-11-21 00:38:45,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:38:45,445 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 77 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:38:45,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 139 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:38:45,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-11-21 00:38:45,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 483. [2021-11-21 00:38:45,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 1.4066390041493777) internal successors, (678), 482 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:45,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 678 transitions. [2021-11-21 00:38:45,498 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 678 transitions. Word has length 89 [2021-11-21 00:38:45,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:38:45,499 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 678 transitions. [2021-11-21 00:38:45,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:45,500 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 678 transitions. [2021-11-21 00:38:45,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-21 00:38:45,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:38:45,512 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:38:45,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:38:45,513 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:38:45,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:38:45,514 INFO L85 PathProgramCache]: Analyzing trace with hash 2122121154, now seen corresponding path program 1 times [2021-11-21 00:38:45,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:38:45,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826069541] [2021-11-21 00:38:45,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:45,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:38:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:45,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:38:45,724 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:38:45,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826069541] [2021-11-21 00:38:45,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826069541] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:38:45,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636180486] [2021-11-21 00:38:45,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:45,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:38:45,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:38:45,734 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:38:45,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:38:45,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:45,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:38:45,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:38:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 00:38:46,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:38:46,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636180486] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:38:46,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:38:46,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-21 00:38:46,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112459700] [2021-11-21 00:38:46,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:38:46,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:38:46,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:38:46,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:38:46,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:38:46,295 INFO L87 Difference]: Start difference. First operand 483 states and 678 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 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) [2021-11-21 00:38:46,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:38:46,767 INFO L93 Difference]: Finished difference Result 1285 states and 1841 transitions. [2021-11-21 00:38:46,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:38:46,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 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 89 [2021-11-21 00:38:46,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:38:46,774 INFO L225 Difference]: With dead ends: 1285 [2021-11-21 00:38:46,774 INFO L226 Difference]: Without dead ends: 803 [2021-11-21 00:38:46,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:38:46,781 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 43 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:38:46,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 20 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:38:46,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-11-21 00:38:46,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 803. [2021-11-21 00:38:46,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 1.4064837905236909) internal successors, (1128), 802 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:46,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1128 transitions. [2021-11-21 00:38:46,838 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1128 transitions. Word has length 89 [2021-11-21 00:38:46,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:38:46,838 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 1128 transitions. [2021-11-21 00:38:46,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 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) [2021-11-21 00:38:46,839 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1128 transitions. [2021-11-21 00:38:46,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-21 00:38:46,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:38:46,842 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:38:46,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-21 00:38:47,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:38:47,065 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:38:47,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:38:47,066 INFO L85 PathProgramCache]: Analyzing trace with hash -522280905, now seen corresponding path program 1 times [2021-11-21 00:38:47,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:38:47,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623054292] [2021-11-21 00:38:47,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:47,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:38:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:38:47,139 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:38:47,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623054292] [2021-11-21 00:38:47,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623054292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:38:47,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:38:47,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:38:47,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206301416] [2021-11-21 00:38:47,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:38:47,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:38:47,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:38:47,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:38:47,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:38:47,153 INFO L87 Difference]: Start difference. First operand 803 states and 1128 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:47,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:38:47,619 INFO L93 Difference]: Finished difference Result 2085 states and 2931 transitions. [2021-11-21 00:38:47,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:38:47,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-11-21 00:38:47,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:38:47,631 INFO L225 Difference]: With dead ends: 2085 [2021-11-21 00:38:47,632 INFO L226 Difference]: Without dead ends: 1283 [2021-11-21 00:38:47,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:38:47,644 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 79 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:38:47,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 146 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:38:47,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2021-11-21 00:38:47,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 1283. [2021-11-21 00:38:47,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 1.3096723868954758) internal successors, (1679), 1282 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:47,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 1679 transitions. [2021-11-21 00:38:47,694 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 1679 transitions. Word has length 93 [2021-11-21 00:38:47,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:38:47,695 INFO L470 AbstractCegarLoop]: Abstraction has 1283 states and 1679 transitions. [2021-11-21 00:38:47,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:47,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 1679 transitions. [2021-11-21 00:38:47,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-21 00:38:47,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:38:47,699 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:38:47,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:38:47,700 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:38:47,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:38:47,701 INFO L85 PathProgramCache]: Analyzing trace with hash 131051692, now seen corresponding path program 1 times [2021-11-21 00:38:47,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:38:47,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662503800] [2021-11-21 00:38:47,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:47,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:38:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:38:47,738 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:38:47,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662503800] [2021-11-21 00:38:47,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662503800] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:38:47,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:38:47,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:38:47,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437384987] [2021-11-21 00:38:47,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:38:47,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:38:47,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:38:47,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:38:47,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:38:47,741 INFO L87 Difference]: Start difference. First operand 1283 states and 1679 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:48,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:38:48,152 INFO L93 Difference]: Finished difference Result 3045 states and 4103 transitions. [2021-11-21 00:38:48,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:38:48,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 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 94 [2021-11-21 00:38:48,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:38:48,167 INFO L225 Difference]: With dead ends: 3045 [2021-11-21 00:38:48,168 INFO L226 Difference]: Without dead ends: 1763 [2021-11-21 00:38:48,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:38:48,172 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 95 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:38:48,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 48 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:38:48,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2021-11-21 00:38:48,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1763. [2021-11-21 00:38:48,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 1.2911464245175936) internal successors, (2275), 1762 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:48,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 2275 transitions. [2021-11-21 00:38:48,221 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 2275 transitions. Word has length 94 [2021-11-21 00:38:48,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:38:48,221 INFO L470 AbstractCegarLoop]: Abstraction has 1763 states and 2275 transitions. [2021-11-21 00:38:48,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:48,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 2275 transitions. [2021-11-21 00:38:48,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-21 00:38:48,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:38:48,226 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:38:48,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:38:48,226 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:38:48,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:38:48,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1065432091, now seen corresponding path program 1 times [2021-11-21 00:38:48,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:38:48,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765252873] [2021-11-21 00:38:48,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:48,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:38:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:38:48,323 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:38:48,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765252873] [2021-11-21 00:38:48,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765252873] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:38:48,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:38:48,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:38:48,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296238177] [2021-11-21 00:38:48,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:38:48,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:38:48,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:38:48,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:38:48,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:38:48,326 INFO L87 Difference]: Start difference. First operand 1763 states and 2275 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:48,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:38:48,698 INFO L93 Difference]: Finished difference Result 3525 states and 4549 transitions. [2021-11-21 00:38:48,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:38:48,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-21 00:38:48,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:38:48,710 INFO L225 Difference]: With dead ends: 3525 [2021-11-21 00:38:48,710 INFO L226 Difference]: Without dead ends: 1763 [2021-11-21 00:38:48,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:38:48,714 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 77 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:38:48,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 18 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:38:48,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2021-11-21 00:38:48,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1603. [2021-11-21 00:38:48,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 1.2596754057428214) internal successors, (2018), 1602 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:48,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 2018 transitions. [2021-11-21 00:38:48,761 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 2018 transitions. Word has length 113 [2021-11-21 00:38:48,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:38:48,761 INFO L470 AbstractCegarLoop]: Abstraction has 1603 states and 2018 transitions. [2021-11-21 00:38:48,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:48,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 2018 transitions. [2021-11-21 00:38:48,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-21 00:38:48,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:38:48,770 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:38:48,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 00:38:48,770 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:38:48,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:38:48,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1275029979, now seen corresponding path program 1 times [2021-11-21 00:38:48,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:38:48,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864903239] [2021-11-21 00:38:48,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:48,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:38:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:48,861 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:38:48,861 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:38:48,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864903239] [2021-11-21 00:38:48,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864903239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:38:48,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:38:48,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:38:48,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231883818] [2021-11-21 00:38:48,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:38:48,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:38:48,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:38:48,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:38:48,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:38:48,866 INFO L87 Difference]: Start difference. First operand 1603 states and 2018 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:49,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:38:49,173 INFO L93 Difference]: Finished difference Result 3045 states and 3865 transitions. [2021-11-21 00:38:49,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:38:49,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 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 122 [2021-11-21 00:38:49,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:38:49,183 INFO L225 Difference]: With dead ends: 3045 [2021-11-21 00:38:49,183 INFO L226 Difference]: Without dead ends: 1443 [2021-11-21 00:38:49,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:38:49,186 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 70 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:38:49,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 145 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:38:49,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-11-21 00:38:49,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1443. [2021-11-21 00:38:49,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1443 states, 1442 states have (on average 1.2295423023578362) internal successors, (1773), 1442 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:49,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 1773 transitions. [2021-11-21 00:38:49,223 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 1773 transitions. Word has length 122 [2021-11-21 00:38:49,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:38:49,223 INFO L470 AbstractCegarLoop]: Abstraction has 1443 states and 1773 transitions. [2021-11-21 00:38:49,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:49,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 1773 transitions. [2021-11-21 00:38:49,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-21 00:38:49,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:38:49,229 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:38:49,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 00:38:49,229 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:38:49,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:38:49,230 INFO L85 PathProgramCache]: Analyzing trace with hash -158022762, now seen corresponding path program 1 times [2021-11-21 00:38:49,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:38:49,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961478181] [2021-11-21 00:38:49,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:49,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:38:49,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-21 00:38:49,307 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:38:49,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961478181] [2021-11-21 00:38:49,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961478181] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:38:49,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:38:49,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:38:49,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216934303] [2021-11-21 00:38:49,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:38:49,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:38:49,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:38:49,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:38:49,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:38:49,314 INFO L87 Difference]: Start difference. First operand 1443 states and 1773 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:49,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:38:49,534 INFO L93 Difference]: Finished difference Result 2645 states and 3285 transitions. [2021-11-21 00:38:49,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:38:49,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 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 148 [2021-11-21 00:38:49,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:38:49,543 INFO L225 Difference]: With dead ends: 2645 [2021-11-21 00:38:49,543 INFO L226 Difference]: Without dead ends: 1123 [2021-11-21 00:38:49,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:38:49,548 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 99 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:38:49,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 4 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:38:49,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-11-21 00:38:49,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 1123. [2021-11-21 00:38:49,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 1122 states have (on average 1.2165775401069518) internal successors, (1365), 1122 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:49,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1365 transitions. [2021-11-21 00:38:49,583 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1365 transitions. Word has length 148 [2021-11-21 00:38:49,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:38:49,583 INFO L470 AbstractCegarLoop]: Abstraction has 1123 states and 1365 transitions. [2021-11-21 00:38:49,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:49,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1365 transitions. [2021-11-21 00:38:49,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-21 00:38:49,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:38:49,589 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:38:49,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 00:38:49,589 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:38:49,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:38:49,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1747197601, now seen corresponding path program 1 times [2021-11-21 00:38:49,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:38:49,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930702721] [2021-11-21 00:38:49,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:49,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:38:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:49,685 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 00:38:49,692 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:38:49,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930702721] [2021-11-21 00:38:49,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930702721] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:38:49,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:38:49,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:38:49,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975169400] [2021-11-21 00:38:49,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:38:49,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:38:49,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:38:49,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:38:49,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:38:49,696 INFO L87 Difference]: Start difference. First operand 1123 states and 1365 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:50,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:38:50,058 INFO L93 Difference]: Finished difference Result 2565 states and 3180 transitions. [2021-11-21 00:38:50,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:38:50,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 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 161 [2021-11-21 00:38:50,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:38:50,070 INFO L225 Difference]: With dead ends: 2565 [2021-11-21 00:38:50,070 INFO L226 Difference]: Without dead ends: 1523 [2021-11-21 00:38:50,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:38:50,073 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 61 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:38:50,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 110 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:38:50,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2021-11-21 00:38:50,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 1363. [2021-11-21 00:38:50,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 1.2261380323054332) internal successors, (1670), 1362 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:50,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 1670 transitions. [2021-11-21 00:38:50,118 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 1670 transitions. Word has length 161 [2021-11-21 00:38:50,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:38:50,119 INFO L470 AbstractCegarLoop]: Abstraction has 1363 states and 1670 transitions. [2021-11-21 00:38:50,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:50,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 1670 transitions. [2021-11-21 00:38:50,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-21 00:38:50,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:38:50,125 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:38:50,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 00:38:50,126 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:38:50,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:38:50,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1882649316, now seen corresponding path program 1 times [2021-11-21 00:38:50,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:38:50,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185111005] [2021-11-21 00:38:50,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:50,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:38:50,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:50,217 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-21 00:38:50,218 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:38:50,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185111005] [2021-11-21 00:38:50,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185111005] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:38:50,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:38:50,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:38:50,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736317424] [2021-11-21 00:38:50,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:38:50,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:38:50,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:38:50,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:38:50,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:38:50,221 INFO L87 Difference]: Start difference. First operand 1363 states and 1670 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:50,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:38:50,529 INFO L93 Difference]: Finished difference Result 2325 states and 2839 transitions. [2021-11-21 00:38:50,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:38:50,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 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 174 [2021-11-21 00:38:50,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:38:50,539 INFO L225 Difference]: With dead ends: 2325 [2021-11-21 00:38:50,540 INFO L226 Difference]: Without dead ends: 1123 [2021-11-21 00:38:50,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:38:50,543 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 33 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:38:50,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 134 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:38:50,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-11-21 00:38:50,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 1123. [2021-11-21 00:38:50,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 1122 states have (on average 1.1096256684491979) internal successors, (1245), 1122 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:50,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1245 transitions. [2021-11-21 00:38:50,580 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1245 transitions. Word has length 174 [2021-11-21 00:38:50,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:38:50,580 INFO L470 AbstractCegarLoop]: Abstraction has 1123 states and 1245 transitions. [2021-11-21 00:38:50,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:50,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1245 transitions. [2021-11-21 00:38:50,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-21 00:38:50,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:38:50,585 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:38:50,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 00:38:50,586 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:38:50,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:38:50,587 INFO L85 PathProgramCache]: Analyzing trace with hash 664507151, now seen corresponding path program 1 times [2021-11-21 00:38:50,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:38:50,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794815794] [2021-11-21 00:38:50,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:50,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:38:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:38:50,708 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:38:50,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794815794] [2021-11-21 00:38:50,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794815794] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:38:50,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:38:50,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:38:50,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373034568] [2021-11-21 00:38:50,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:38:50,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:38:50,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:38:50,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:38:50,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:38:50,712 INFO L87 Difference]: Start difference. First operand 1123 states and 1245 transitions. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:51,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:38:51,135 INFO L93 Difference]: Finished difference Result 2165 states and 2406 transitions. [2021-11-21 00:38:51,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:38:51,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 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 187 [2021-11-21 00:38:51,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:38:51,143 INFO L225 Difference]: With dead ends: 2165 [2021-11-21 00:38:51,143 INFO L226 Difference]: Without dead ends: 1123 [2021-11-21 00:38:51,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:38:51,146 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 126 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:38:51,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 114 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:38:51,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-11-21 00:38:51,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 1123. [2021-11-21 00:38:51,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 1122 states have (on average 1.1042780748663101) internal successors, (1239), 1122 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:51,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1239 transitions. [2021-11-21 00:38:51,191 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1239 transitions. Word has length 187 [2021-11-21 00:38:51,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:38:51,192 INFO L470 AbstractCegarLoop]: Abstraction has 1123 states and 1239 transitions. [2021-11-21 00:38:51,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:51,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1239 transitions. [2021-11-21 00:38:51,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-21 00:38:51,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:38:51,199 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:38:51,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 00:38:51,200 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:38:51,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:38:51,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1321376543, now seen corresponding path program 1 times [2021-11-21 00:38:51,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:38:51,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847093527] [2021-11-21 00:38:51,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:51,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:38:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:51,355 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 157 proven. 63 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:38:51,355 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:38:51,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847093527] [2021-11-21 00:38:51,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847093527] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:38:51,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210952879] [2021-11-21 00:38:51,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:51,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:38:51,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:38:51,361 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:38:51,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:38:51,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:51,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:38:51,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:38:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-21 00:38:51,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:38:51,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210952879] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:38:51,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:38:51,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-21 00:38:51,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97186463] [2021-11-21 00:38:51,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:38:51,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:38:51,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:38:51,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:38:51,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:38:51,978 INFO L87 Difference]: Start difference. First operand 1123 states and 1239 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:52,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:38:52,231 INFO L93 Difference]: Finished difference Result 2405 states and 2671 transitions. [2021-11-21 00:38:52,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:38:52,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 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 219 [2021-11-21 00:38:52,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:38:52,240 INFO L225 Difference]: With dead ends: 2405 [2021-11-21 00:38:52,240 INFO L226 Difference]: Without dead ends: 1363 [2021-11-21 00:38:52,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:38:52,243 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 77 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:38:52,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 101 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:38:52,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2021-11-21 00:38:52,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 1283. [2021-11-21 00:38:52,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 1.094383775351014) internal successors, (1403), 1282 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:52,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 1403 transitions. [2021-11-21 00:38:52,278 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 1403 transitions. Word has length 219 [2021-11-21 00:38:52,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:38:52,279 INFO L470 AbstractCegarLoop]: Abstraction has 1283 states and 1403 transitions. [2021-11-21 00:38:52,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:52,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 1403 transitions. [2021-11-21 00:38:52,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-21 00:38:52,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:38:52,286 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:38:52,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:38:52,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-21 00:38:52,499 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:38:52,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:38:52,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1724317308, now seen corresponding path program 1 times [2021-11-21 00:38:52,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:38:52,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737038481] [2021-11-21 00:38:52,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:52,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:38:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 297 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 00:38:52,655 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:38:52,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737038481] [2021-11-21 00:38:52,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737038481] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:38:52,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:38:52,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:38:52,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708559647] [2021-11-21 00:38:52,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:38:52,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:38:52,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:38:52,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:38:52,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:38:52,662 INFO L87 Difference]: Start difference. First operand 1283 states and 1403 transitions. Second operand has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:53,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:38:53,105 INFO L93 Difference]: Finished difference Result 2485 states and 2722 transitions. [2021-11-21 00:38:53,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:38:53,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 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 232 [2021-11-21 00:38:53,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:38:53,114 INFO L225 Difference]: With dead ends: 2485 [2021-11-21 00:38:53,114 INFO L226 Difference]: Without dead ends: 1283 [2021-11-21 00:38:53,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:38:53,117 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 89 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:38:53,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 129 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:38:53,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2021-11-21 00:38:53,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 1283. [2021-11-21 00:38:53,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 1.0873634945397816) internal successors, (1394), 1282 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:53,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 1394 transitions. [2021-11-21 00:38:53,156 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 1394 transitions. Word has length 232 [2021-11-21 00:38:53,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:38:53,157 INFO L470 AbstractCegarLoop]: Abstraction has 1283 states and 1394 transitions. [2021-11-21 00:38:53,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:53,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 1394 transitions. [2021-11-21 00:38:53,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-21 00:38:53,167 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:38:53,167 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:38:53,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 00:38:53,168 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:38:53,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:38:53,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1473431533, now seen corresponding path program 1 times [2021-11-21 00:38:53,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:38:53,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9123680] [2021-11-21 00:38:53,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:53,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:38:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 222 proven. 94 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-21 00:38:53,448 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:38:53,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9123680] [2021-11-21 00:38:53,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9123680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:38:53,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071785244] [2021-11-21 00:38:53,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:53,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:38:53,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:38:53,453 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:38:53,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:38:53,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:53,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:38:53,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:38:54,182 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-21 00:38:54,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:38:54,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071785244] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:38:54,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:38:54,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-21 00:38:54,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122891578] [2021-11-21 00:38:54,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:38:54,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:38:54,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:38:54,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:38:54,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:38:54,186 INFO L87 Difference]: Start difference. First operand 1283 states and 1394 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:54,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:38:54,452 INFO L93 Difference]: Finished difference Result 2245 states and 2465 transitions. [2021-11-21 00:38:54,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:38:54,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 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 267 [2021-11-21 00:38:54,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:38:54,459 INFO L225 Difference]: With dead ends: 2245 [2021-11-21 00:38:54,459 INFO L226 Difference]: Without dead ends: 1043 [2021-11-21 00:38:54,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:38:54,464 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 73 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:38:54,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 111 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:38:54,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2021-11-21 00:38:54,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 1043. [2021-11-21 00:38:54,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 1042 states have (on average 1.079654510556622) internal successors, (1125), 1042 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) [2021-11-21 00:38:54,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1125 transitions. [2021-11-21 00:38:54,497 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1125 transitions. Word has length 267 [2021-11-21 00:38:54,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:38:54,498 INFO L470 AbstractCegarLoop]: Abstraction has 1043 states and 1125 transitions. [2021-11-21 00:38:54,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:54,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1125 transitions. [2021-11-21 00:38:54,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-21 00:38:54,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:38:54,504 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:38:54,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:38:54,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:38:54,721 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:38:54,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:38:54,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1581974389, now seen corresponding path program 1 times [2021-11-21 00:38:54,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:38:54,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588977453] [2021-11-21 00:38:54,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:54,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:38:54,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:54,914 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 237 proven. 94 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-21 00:38:54,915 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:38:54,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588977453] [2021-11-21 00:38:54,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588977453] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:38:54,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733850229] [2021-11-21 00:38:54,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:54,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:38:54,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:38:54,917 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:38:54,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:38:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:55,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:38:55,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:38:55,787 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 226 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-11-21 00:38:55,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:38:55,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733850229] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:38:55,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:38:55,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-21 00:38:55,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466863542] [2021-11-21 00:38:55,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:38:55,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:38:55,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:38:55,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:38:55,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:38:55,791 INFO L87 Difference]: Start difference. First operand 1043 states and 1125 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:56,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:38:56,116 INFO L93 Difference]: Finished difference Result 1603 states and 1736 transitions. [2021-11-21 00:38:56,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:38:56,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 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 272 [2021-11-21 00:38:56,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:38:56,118 INFO L225 Difference]: With dead ends: 1603 [2021-11-21 00:38:56,118 INFO L226 Difference]: Without dead ends: 0 [2021-11-21 00:38:56,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:38:56,122 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 72 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:38:56,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 93 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:38:56,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-21 00:38:56,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-21 00:38:56,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:56,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-21 00:38:56,125 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 272 [2021-11-21 00:38:56,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:38:56,126 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-21 00:38:56,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:56,127 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-21 00:38:56,127 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-21 00:38:56,131 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-21 00:38:56,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:38:56,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-21 00:38:56,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-21 00:38:57,055 INFO L858 garLoopResultBuilder]: For program point L499-1(lines 39 608) no Hoare annotation was computed. [2021-11-21 00:38:57,055 INFO L858 garLoopResultBuilder]: For program point L301(lines 301 423) no Hoare annotation was computed. [2021-11-21 00:38:57,056 INFO L858 garLoopResultBuilder]: For program point L235(lines 235 423) no Hoare annotation was computed. [2021-11-21 00:38:57,056 INFO L858 garLoopResultBuilder]: For program point L169(lines 169 423) no Hoare annotation was computed. [2021-11-21 00:38:57,056 INFO L858 garLoopResultBuilder]: For program point L303(lines 303 423) no Hoare annotation was computed. [2021-11-21 00:38:57,056 INFO L858 garLoopResultBuilder]: For program point L105(lines 105 423) no Hoare annotation was computed. [2021-11-21 00:38:57,056 INFO L858 garLoopResultBuilder]: For program point L502-1(lines 39 608) no Hoare annotation was computed. [2021-11-21 00:38:57,056 INFO L858 garLoopResultBuilder]: For program point L40(lines 40 423) no Hoare annotation was computed. [2021-11-21 00:38:57,057 INFO L858 garLoopResultBuilder]: For program point L503(line 503) no Hoare annotation was computed. [2021-11-21 00:38:57,057 INFO L858 garLoopResultBuilder]: For program point L371(lines 371 423) no Hoare annotation was computed. [2021-11-21 00:38:57,057 INFO L858 garLoopResultBuilder]: For program point L307(lines 307 423) no Hoare annotation was computed. [2021-11-21 00:38:57,057 INFO L858 garLoopResultBuilder]: For program point L175(lines 175 423) no Hoare annotation was computed. [2021-11-21 00:38:57,057 INFO L858 garLoopResultBuilder]: For program point L109(lines 109 423) no Hoare annotation was computed. [2021-11-21 00:38:57,057 INFO L858 garLoopResultBuilder]: For program point L242(lines 242 423) no Hoare annotation was computed. [2021-11-21 00:38:57,058 INFO L858 garLoopResultBuilder]: For program point L45(lines 45 423) no Hoare annotation was computed. [2021-11-21 00:38:57,058 INFO L858 garLoopResultBuilder]: For program point L244(lines 244 423) no Hoare annotation was computed. [2021-11-21 00:38:57,058 INFO L858 garLoopResultBuilder]: For program point L179(lines 179 423) no Hoare annotation was computed. [2021-11-21 00:38:57,058 INFO L858 garLoopResultBuilder]: For program point L378(lines 378 423) no Hoare annotation was computed. [2021-11-21 00:38:57,058 INFO L858 garLoopResultBuilder]: For program point L48(lines 48 423) no Hoare annotation was computed. [2021-11-21 00:38:57,058 INFO L858 garLoopResultBuilder]: For program point L247(lines 247 423) no Hoare annotation was computed. [2021-11-21 00:38:57,059 INFO L858 garLoopResultBuilder]: For program point L116(lines 116 423) no Hoare annotation was computed. [2021-11-21 00:38:57,059 INFO L858 garLoopResultBuilder]: For program point L52(lines 52 423) no Hoare annotation was computed. [2021-11-21 00:38:57,059 INFO L858 garLoopResultBuilder]: For program point L185(lines 185 423) no Hoare annotation was computed. [2021-11-21 00:38:57,059 INFO L858 garLoopResultBuilder]: For program point L385(lines 385 423) no Hoare annotation was computed. [2021-11-21 00:38:57,059 INFO L858 garLoopResultBuilder]: For program point L319(lines 319 423) no Hoare annotation was computed. [2021-11-21 00:38:57,060 INFO L858 garLoopResultBuilder]: For program point L189(lines 189 423) no Hoare annotation was computed. [2021-11-21 00:38:57,060 INFO L858 garLoopResultBuilder]: For program point L123(lines 123 423) no Hoare annotation was computed. [2021-11-21 00:38:57,060 INFO L858 garLoopResultBuilder]: For program point L57(lines 57 423) no Hoare annotation was computed. [2021-11-21 00:38:57,060 INFO L858 garLoopResultBuilder]: For program point L388(lines 388 423) no Hoare annotation was computed. [2021-11-21 00:38:57,060 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-21 00:38:57,060 INFO L858 garLoopResultBuilder]: For program point L390(lines 390 423) no Hoare annotation was computed. [2021-11-21 00:38:57,061 INFO L858 garLoopResultBuilder]: For program point L324(lines 324 423) no Hoare annotation was computed. [2021-11-21 00:38:57,061 INFO L858 garLoopResultBuilder]: For program point L258(lines 258 423) no Hoare annotation was computed. [2021-11-21 00:38:57,061 INFO L858 garLoopResultBuilder]: For program point L60(lines 60 423) no Hoare annotation was computed. [2021-11-21 00:38:57,061 INFO L858 garLoopResultBuilder]: For program point L195(lines 195 423) no Hoare annotation was computed. [2021-11-21 00:38:57,061 INFO L858 garLoopResultBuilder]: For program point L129(lines 129 423) no Hoare annotation was computed. [2021-11-21 00:38:57,062 INFO L858 garLoopResultBuilder]: For program point L64(lines 64 423) no Hoare annotation was computed. [2021-11-21 00:38:57,062 INFO L858 garLoopResultBuilder]: For program point L263(lines 263 423) no Hoare annotation was computed. [2021-11-21 00:38:57,062 INFO L858 garLoopResultBuilder]: For program point L197(lines 197 423) no Hoare annotation was computed. [2021-11-21 00:38:57,062 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 503) no Hoare annotation was computed. [2021-11-21 00:38:57,062 INFO L858 garLoopResultBuilder]: For program point L199(lines 199 423) no Hoare annotation was computed. [2021-11-21 00:38:57,063 INFO L858 garLoopResultBuilder]: For program point L133(lines 133 423) no Hoare annotation was computed. [2021-11-21 00:38:57,063 INFO L858 garLoopResultBuilder]: For program point L399(lines 399 423) no Hoare annotation was computed. [2021-11-21 00:38:57,063 INFO L858 garLoopResultBuilder]: For program point L201(lines 201 423) no Hoare annotation was computed. [2021-11-21 00:38:57,063 INFO L858 garLoopResultBuilder]: For program point L69(lines 69 423) no Hoare annotation was computed. [2021-11-21 00:38:57,063 INFO L858 garLoopResultBuilder]: For program point L269(lines 269 423) no Hoare annotation was computed. [2021-11-21 00:38:57,064 INFO L858 garLoopResultBuilder]: For program point L204(lines 204 423) no Hoare annotation was computed. [2021-11-21 00:38:57,064 INFO L858 garLoopResultBuilder]: For program point L271(lines 271 423) no Hoare annotation was computed. [2021-11-21 00:38:57,064 INFO L858 garLoopResultBuilder]: For program point L404(lines 404 423) no Hoare annotation was computed. [2021-11-21 00:38:57,064 INFO L858 garLoopResultBuilder]: For program point L338(lines 338 423) no Hoare annotation was computed. [2021-11-21 00:38:57,064 INFO L858 garLoopResultBuilder]: For program point L140(lines 140 423) no Hoare annotation was computed. [2021-11-21 00:38:57,065 INFO L858 garLoopResultBuilder]: For program point L75(lines 75 423) no Hoare annotation was computed. [2021-11-21 00:38:57,065 INFO L858 garLoopResultBuilder]: For program point L208(lines 208 423) no Hoare annotation was computed. [2021-11-21 00:38:57,065 INFO L858 garLoopResultBuilder]: For program point L341(lines 341 423) no Hoare annotation was computed. [2021-11-21 00:38:57,065 INFO L858 garLoopResultBuilder]: For program point L408(lines 408 423) no Hoare annotation was computed. [2021-11-21 00:38:57,065 INFO L858 garLoopResultBuilder]: For program point L144(lines 144 423) no Hoare annotation was computed. [2021-11-21 00:38:57,066 INFO L854 garLoopResultBuilder]: At program point L607(lines 39 608) the Hoare annotation is: (let ((.cse0 (<= 10 ~a28~0)) (.cse6 (<= ~a17~0 7)) (.cse10 (= ~a25~0 ~a11~0)) (.cse11 (<= ~a28~0 7)) (.cse9 (<= 9 ~a28~0)) (.cse1 (= ~a25~0 1)) (.cse8 (= ~a19~0 1)) (.cse2 (<= ~a17~0 8)) (.cse3 (<= ~a11~0 0)) (.cse4 (<= ~a28~0 10)) (.cse7 (= ~a25~0 0)) (.cse5 (<= ~a19~0 0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5) (and .cse0 .cse6 .cse4 .cse7) (and .cse0 .cse2 .cse4 .cse8) (and .cse9 .cse1 .cse6 .cse4) (and .cse1 .cse2 .cse3 .cse8) (and .cse10 .cse2 .cse8 .cse7 .cse11) (and .cse9 .cse2 .cse3 .cse4 .cse8 .cse7) (and .cse2 (or (and (= 7 ~a28~0) .cse1) (and (= ~a28~0 8) .cse7))) (and .cse10 .cse1 .cse2 .cse8 .cse11) (and .cse9 .cse1 .cse2 .cse4 .cse8) (and (= ~a11~0 1) .cse2 .cse4 .cse7) (and .cse2 .cse3 .cse4 .cse7 .cse5))) [2021-11-21 00:38:57,066 INFO L858 garLoopResultBuilder]: For program point L79(lines 79 423) no Hoare annotation was computed. [2021-11-21 00:38:57,066 INFO L858 garLoopResultBuilder]: For program point L212(lines 212 423) no Hoare annotation was computed. [2021-11-21 00:38:57,066 INFO L861 garLoopResultBuilder]: At program point L610(lines 610 627) the Hoare annotation is: true [2021-11-21 00:38:57,066 INFO L858 garLoopResultBuilder]: For program point L412(lines 412 423) no Hoare annotation was computed. [2021-11-21 00:38:57,067 INFO L858 garLoopResultBuilder]: For program point L347(lines 347 423) no Hoare annotation was computed. [2021-11-21 00:38:57,067 INFO L858 garLoopResultBuilder]: For program point L149(lines 149 423) no Hoare annotation was computed. [2021-11-21 00:38:57,067 INFO L858 garLoopResultBuilder]: For program point L414(lines 414 423) no Hoare annotation was computed. [2021-11-21 00:38:57,067 INFO L858 garLoopResultBuilder]: For program point L84(lines 84 423) no Hoare annotation was computed. [2021-11-21 00:38:57,067 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-21 00:38:57,067 INFO L858 garLoopResultBuilder]: For program point L417(lines 417 423) no Hoare annotation was computed. [2021-11-21 00:38:57,068 INFO L858 garLoopResultBuilder]: For program point L153(lines 153 423) no Hoare annotation was computed. [2021-11-21 00:38:57,068 INFO L854 garLoopResultBuilder]: At program point L616-2(lines 616 626) the Hoare annotation is: (let ((.cse0 (<= 10 ~a28~0)) (.cse6 (<= ~a17~0 7)) (.cse10 (= ~a25~0 ~a11~0)) (.cse11 (<= ~a28~0 7)) (.cse9 (<= 9 ~a28~0)) (.cse1 (= ~a25~0 1)) (.cse8 (= ~a19~0 1)) (.cse2 (<= ~a17~0 8)) (.cse3 (<= ~a11~0 0)) (.cse4 (<= ~a28~0 10)) (.cse7 (= ~a25~0 0)) (.cse5 (<= ~a19~0 0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5) (and .cse0 .cse6 .cse4 .cse7) (and .cse0 .cse2 .cse4 .cse8) (and .cse9 .cse1 .cse6 .cse4) (and .cse1 .cse2 .cse3 .cse8) (and .cse10 .cse2 .cse8 .cse7 .cse11) (and .cse9 .cse2 .cse3 .cse4 .cse8 .cse7) (and .cse2 (or (and (= 7 ~a28~0) .cse1) (and (= ~a28~0 8) .cse7))) (and .cse10 .cse1 .cse2 .cse8 .cse11) (and .cse9 .cse1 .cse2 .cse4 .cse8) (and (= ~a11~0 1) .cse2 .cse4 .cse7) (and .cse2 .cse3 .cse4 .cse7 .cse5))) [2021-11-21 00:38:57,068 INFO L858 garLoopResultBuilder]: For program point L286(lines 286 423) no Hoare annotation was computed. [2021-11-21 00:38:57,068 INFO L858 garLoopResultBuilder]: For program point L419(lines 419 423) no Hoare annotation was computed. [2021-11-21 00:38:57,069 INFO L858 garLoopResultBuilder]: For program point L222(lines 222 423) no Hoare annotation was computed. [2021-11-21 00:38:57,069 INFO L858 garLoopResultBuilder]: For program point L290(lines 290 423) no Hoare annotation was computed. [2021-11-21 00:38:57,069 INFO L858 garLoopResultBuilder]: For program point L158(lines 158 423) no Hoare annotation was computed. [2021-11-21 00:38:57,069 INFO L858 garLoopResultBuilder]: For program point L92(lines 92 423) no Hoare annotation was computed. [2021-11-21 00:38:57,069 INFO L858 garLoopResultBuilder]: For program point L621(line 621) no Hoare annotation was computed. [2021-11-21 00:38:57,069 INFO L858 garLoopResultBuilder]: For program point L225(lines 225 423) no Hoare annotation was computed. [2021-11-21 00:38:57,070 INFO L858 garLoopResultBuilder]: For program point L359(lines 359 423) no Hoare annotation was computed. [2021-11-21 00:38:57,070 INFO L858 garLoopResultBuilder]: For program point L293(lines 293 423) no Hoare annotation was computed. [2021-11-21 00:38:57,070 INFO L858 garLoopResultBuilder]: For program point L228(lines 228 423) no Hoare annotation was computed. [2021-11-21 00:38:57,070 INFO L858 garLoopResultBuilder]: For program point L296(lines 296 423) no Hoare annotation was computed. [2021-11-21 00:38:57,070 INFO L858 garLoopResultBuilder]: For program point L164(lines 164 423) no Hoare annotation was computed. [2021-11-21 00:38:57,071 INFO L858 garLoopResultBuilder]: For program point L364(lines 364 423) no Hoare annotation was computed. [2021-11-21 00:38:57,071 INFO L858 garLoopResultBuilder]: For program point L233(lines 233 423) no Hoare annotation was computed. [2021-11-21 00:38:57,071 INFO L858 garLoopResultBuilder]: For program point L101(lines 101 423) no Hoare annotation was computed. [2021-11-21 00:38:57,074 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:38:57,076 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 00:38:57,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 12:38:57 BoogieIcfgContainer [2021-11-21 00:38:57,100 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 00:38:57,101 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 00:38:57,101 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 00:38:57,101 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 00:38:57,102 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:38:43" (3/4) ... [2021-11-21 00:38:57,105 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-21 00:38:57,132 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 116 nodes and edges [2021-11-21 00:38:57,134 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 22 nodes and edges [2021-11-21 00:38:57,136 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-11-21 00:38:57,139 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-21 00:38:57,263 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/witness.graphml [2021-11-21 00:38:57,264 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 00:38:57,264 INFO L158 Benchmark]: Toolchain (without parser) took 16931.08ms. Allocated memory was 146.8MB in the beginning and 281.0MB in the end (delta: 134.2MB). Free memory was 117.1MB in the beginning and 155.5MB in the end (delta: -38.4MB). Peak memory consumption was 96.6MB. Max. memory is 16.1GB. [2021-11-21 00:38:57,265 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 92.3MB. Free memory was 54.3MB in the beginning and 54.2MB in the end (delta: 50.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:38:57,265 INFO L158 Benchmark]: CACSL2BoogieTranslator took 709.90ms. Allocated memory is still 146.8MB. Free memory was 116.9MB in the beginning and 107.4MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-21 00:38:57,265 INFO L158 Benchmark]: Boogie Procedure Inliner took 97.54ms. Allocated memory is still 146.8MB. Free memory was 107.4MB in the beginning and 101.7MB in the end (delta: 5.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-21 00:38:57,266 INFO L158 Benchmark]: Boogie Preprocessor took 71.59ms. Allocated memory is still 146.8MB. Free memory was 101.7MB in the beginning and 97.5MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-21 00:38:57,266 INFO L158 Benchmark]: RCFGBuilder took 1788.62ms. Allocated memory is still 146.8MB. Free memory was 97.5MB in the beginning and 108.1MB in the end (delta: -10.6MB). Peak memory consumption was 41.3MB. Max. memory is 16.1GB. [2021-11-21 00:38:57,267 INFO L158 Benchmark]: TraceAbstraction took 14088.72ms. Allocated memory was 146.8MB in the beginning and 281.0MB in the end (delta: 134.2MB). Free memory was 107.2MB in the beginning and 171.2MB in the end (delta: -64.0MB). Peak memory consumption was 69.0MB. Max. memory is 16.1GB. [2021-11-21 00:38:57,267 INFO L158 Benchmark]: Witness Printer took 163.10ms. Allocated memory is still 281.0MB. Free memory was 171.2MB in the beginning and 155.5MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-21 00:38:57,269 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 92.3MB. Free memory was 54.3MB in the beginning and 54.2MB in the end (delta: 50.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 709.90ms. Allocated memory is still 146.8MB. Free memory was 116.9MB in the beginning and 107.4MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 97.54ms. Allocated memory is still 146.8MB. Free memory was 107.4MB in the beginning and 101.7MB in the end (delta: 5.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 71.59ms. Allocated memory is still 146.8MB. Free memory was 101.7MB in the beginning and 97.5MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1788.62ms. Allocated memory is still 146.8MB. Free memory was 97.5MB in the beginning and 108.1MB in the end (delta: -10.6MB). Peak memory consumption was 41.3MB. Max. memory is 16.1GB. * TraceAbstraction took 14088.72ms. Allocated memory was 146.8MB in the beginning and 281.0MB in the end (delta: 134.2MB). Free memory was 107.2MB in the beginning and 171.2MB in the end (delta: -64.0MB). Peak memory consumption was 69.0MB. Max. memory is 16.1GB. * Witness Printer took 163.10ms. Allocated memory is still 281.0MB. Free memory was 171.2MB in the beginning and 155.5MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 503]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 85 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 14.0s, OverallIterations: 16, TraceHistogramMax: 6, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 6.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1169 SdHoareTripleChecker+Valid, 5.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1169 mSDsluCounter, 1430 SdHoareTripleChecker+Invalid, 4.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 106 mSDsCounter, 681 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3888 IncrementalHoareTripleChecker+Invalid, 4569 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 681 mSolverCounterUnsat, 1325 mSDtfsCounter, 3888 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 894 GetRequests, 866 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1763occurred in iteration=6, InterpolantAutomatonStates: 50, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 16 MinimizatonAttempts, 400 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 45 NumberOfFragments, 375 HoareAnnotationTreeSize, 3 FomulaSimplifications, 88 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 658 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 3271 NumberOfCodeBlocks, 3271 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 3251 ConstructedInterpolants, 0 QuantifiedInterpolants, 9111 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1642 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 20 InterpolantComputations, 16 PerfectInterpolantSequences, 2945/3204 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 616]: Loop Invariant Derived loop invariant: (((((((((((((((10 <= a28 && a25 == 1) && a17 <= 8) && a11 <= 0) && a28 <= 10) && a19 <= 0) || (((10 <= a28 && a17 <= 7) && a28 <= 10) && a25 == 0)) || (((10 <= a28 && a17 <= 8) && a28 <= 10) && a19 == 1)) || (((9 <= a28 && a25 == 1) && a17 <= 7) && a28 <= 10)) || (((a25 == 1 && a17 <= 8) && a11 <= 0) && a19 == 1)) || ((((a25 == a11 && a17 <= 8) && a19 == 1) && a25 == 0) && a28 <= 7)) || (((((9 <= a28 && a17 <= 8) && a11 <= 0) && a28 <= 10) && a19 == 1) && a25 == 0)) || (a17 <= 8 && ((7 == a28 && a25 == 1) || (a28 == 8 && a25 == 0)))) || ((((a25 == a11 && a25 == 1) && a17 <= 8) && a19 == 1) && a28 <= 7)) || ((((9 <= a28 && a25 == 1) && a17 <= 8) && a28 <= 10) && a19 == 1)) || (((a11 == 1 && a17 <= 8) && a28 <= 10) && a25 == 0)) || ((((a17 <= 8 && a11 <= 0) && a28 <= 10) && a25 == 0) && a19 <= 0) - InvariantResult [Line: 610]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: (((((((((((((((10 <= a28 && a25 == 1) && a17 <= 8) && a11 <= 0) && a28 <= 10) && a19 <= 0) || (((10 <= a28 && a17 <= 7) && a28 <= 10) && a25 == 0)) || (((10 <= a28 && a17 <= 8) && a28 <= 10) && a19 == 1)) || (((9 <= a28 && a25 == 1) && a17 <= 7) && a28 <= 10)) || (((a25 == 1 && a17 <= 8) && a11 <= 0) && a19 == 1)) || ((((a25 == a11 && a17 <= 8) && a19 == 1) && a25 == 0) && a28 <= 7)) || (((((9 <= a28 && a17 <= 8) && a11 <= 0) && a28 <= 10) && a19 == 1) && a25 == 0)) || (a17 <= 8 && ((7 == a28 && a25 == 1) || (a28 == 8 && a25 == 0)))) || ((((a25 == a11 && a25 == 1) && a17 <= 8) && a19 == 1) && a28 <= 7)) || ((((9 <= a28 && a25 == 1) && a17 <= 8) && a28 <= 10) && a19 == 1)) || (((a11 == 1 && a17 <= 8) && a28 <= 10) && a25 == 0)) || ((((a17 <= 8 && a11 <= 0) && a28 <= 10) && a25 == 0) && a19 <= 0) RESULT: Ultimate proved your program to be correct! [2021-11-21 00:38:57,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc5e906-109c-4ef0-b633-adc7d180105e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE