./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/psyco/psyco_abp_1-3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96dc758d-5497-48e5-891c-b2716932cbd8/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96dc758d-5497-48e5-891c-b2716932cbd8/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96dc758d-5497-48e5-891c-b2716932cbd8/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96dc758d-5497-48e5-891c-b2716932cbd8/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/psyco/psyco_abp_1-3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96dc758d-5497-48e5-891c-b2716932cbd8/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96dc758d-5497-48e5-891c-b2716932cbd8/bin/utaipan-eEHZpOm5b7 --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 041b6fdf6940cdc60d0f8513696cf56c45d5af72c3bd8ce1d60d3ac14fc6f3dc --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:08:57,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:08:57,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:08:57,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:08:57,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:08:57,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:08:57,908 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:08:57,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:08:57,912 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:08:57,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:08:57,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:08:57,916 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:08:57,917 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:08:57,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:08:57,920 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:08:57,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:08:57,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:08:57,923 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:08:57,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:08:57,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:08:57,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:08:57,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:08:57,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:08:57,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:08:57,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:08:57,939 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:08:57,939 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:08:57,940 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:08:57,941 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:08:57,942 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:08:57,943 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:08:57,944 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:08:57,945 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:08:57,946 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:08:57,947 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:08:57,947 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:08:57,948 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:08:57,949 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:08:57,949 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:08:57,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:08:57,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:08:57,952 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96dc758d-5497-48e5-891c-b2716932cbd8/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:08:57,978 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:08:57,978 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:08:57,979 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:08:57,979 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:08:57,980 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:08:57,980 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:08:57,981 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:08:57,981 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:08:57,982 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:08:57,982 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:08:57,982 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:08:57,983 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:08:57,983 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:08:57,984 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:08:57,984 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:08:57,984 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:08:57,985 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:08:57,985 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:08:57,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:08:57,986 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:08:57,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:08:57,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:08:57,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:08:57,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:08:57,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:08:57,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:08:57,988 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:08:57,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:08:57,988 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:08:57,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:08:57,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:08:57,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:08:57,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:08:57,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:08:57,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:08:57,990 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:08:57,990 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:08:57,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:08:57,991 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:08:57,991 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:08:57,991 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:08:57,991 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_96dc758d-5497-48e5-891c-b2716932cbd8/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96dc758d-5497-48e5-891c-b2716932cbd8/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 041b6fdf6940cdc60d0f8513696cf56c45d5af72c3bd8ce1d60d3ac14fc6f3dc [2021-11-25 20:08:58,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:08:58,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:08:58,279 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:08:58,281 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:08:58,281 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:08:58,283 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96dc758d-5497-48e5-891c-b2716932cbd8/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/psyco/psyco_abp_1-3.c [2021-11-25 20:08:58,371 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96dc758d-5497-48e5-891c-b2716932cbd8/bin/utaipan-eEHZpOm5b7/data/d873dec9e/5fb1fa228e124eea92e5ef9f23f7bc19/FLAG8e6d33ed8 [2021-11-25 20:08:58,880 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:08:58,885 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96dc758d-5497-48e5-891c-b2716932cbd8/sv-benchmarks/c/psyco/psyco_abp_1-3.c [2021-11-25 20:08:58,904 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96dc758d-5497-48e5-891c-b2716932cbd8/bin/utaipan-eEHZpOm5b7/data/d873dec9e/5fb1fa228e124eea92e5ef9f23f7bc19/FLAG8e6d33ed8 [2021-11-25 20:08:59,184 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96dc758d-5497-48e5-891c-b2716932cbd8/bin/utaipan-eEHZpOm5b7/data/d873dec9e/5fb1fa228e124eea92e5ef9f23f7bc19 [2021-11-25 20:08:59,187 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:08:59,188 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:08:59,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:08:59,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:08:59,193 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:08:59,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:08:59" (1/1) ... [2021-11-25 20:08:59,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bb42b13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:08:59, skipping insertion in model container [2021-11-25 20:08:59,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:08:59" (1/1) ... [2021-11-25 20:08:59,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:08:59,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:08:59,514 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_96dc758d-5497-48e5-891c-b2716932cbd8/sv-benchmarks/c/psyco/psyco_abp_1-3.c[24720,24733] [2021-11-25 20:08:59,522 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:08:59,530 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:08:59,634 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_96dc758d-5497-48e5-891c-b2716932cbd8/sv-benchmarks/c/psyco/psyco_abp_1-3.c[24720,24733] [2021-11-25 20:08:59,651 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:08:59,664 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:08:59,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:08:59 WrapperNode [2021-11-25 20:08:59,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:08:59,670 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:08:59,670 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:08:59,670 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:08:59,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:08:59" (1/1) ... [2021-11-25 20:08:59,700 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:08:59" (1/1) ... [2021-11-25 20:08:59,750 INFO L137 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 415 [2021-11-25 20:08:59,751 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:08:59,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:08:59,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:08:59,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:08:59,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:08:59" (1/1) ... [2021-11-25 20:08:59,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:08:59" (1/1) ... [2021-11-25 20:08:59,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:08:59" (1/1) ... [2021-11-25 20:08:59,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:08:59" (1/1) ... [2021-11-25 20:08:59,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:08:59" (1/1) ... [2021-11-25 20:08:59,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:08:59" (1/1) ... [2021-11-25 20:08:59,813 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:08:59" (1/1) ... [2021-11-25 20:08:59,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:08:59,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:08:59,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:08:59,832 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:08:59,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:08:59" (1/1) ... [2021-11-25 20:08:59,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:08:59,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96dc758d-5497-48e5-891c-b2716932cbd8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:08:59,872 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96dc758d-5497-48e5-891c-b2716932cbd8/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:08:59,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96dc758d-5497-48e5-891c-b2716932cbd8/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:08:59,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:08:59,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:08:59,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:08:59,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:09:00,040 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:09:00,042 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:09:00,849 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:09:00,862 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:09:00,868 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 20:09:00,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:09:00 BoogieIcfgContainer [2021-11-25 20:09:00,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:09:00,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:09:00,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:09:00,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:09:00,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:08:59" (1/3) ... [2021-11-25 20:09:00,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14744f61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:09:00, skipping insertion in model container [2021-11-25 20:09:00,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:08:59" (2/3) ... [2021-11-25 20:09:00,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14744f61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:09:00, skipping insertion in model container [2021-11-25 20:09:00,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:09:00" (3/3) ... [2021-11-25 20:09:00,883 INFO L111 eAbstractionObserver]: Analyzing ICFG psyco_abp_1-3.c [2021-11-25 20:09:00,894 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:09:00,894 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:09:00,962 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:09:00,973 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 [2021-11-25 20:09:00,973 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:09:00,989 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 105 states have (on average 1.9714285714285715) internal successors, (207), 106 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:00,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 20:09:00,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:00,996 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:09:00,996 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:01,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:01,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1235094703, now seen corresponding path program 1 times [2021-11-25 20:09:01,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:01,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169696202] [2021-11-25 20:09:01,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:01,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:09:01,164 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:01,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169696202] [2021-11-25 20:09:01,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169696202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:09:01,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:09:01,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:09:01,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521862136] [2021-11-25 20:09:01,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:09:01,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 20:09:01,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:01,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 20:09:01,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 20:09:01,200 INFO L87 Difference]: Start difference. First operand has 107 states, 105 states have (on average 1.9714285714285715) internal successors, (207), 106 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:01,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:01,235 INFO L93 Difference]: Finished difference Result 213 states and 413 transitions. [2021-11-25 20:09:01,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 20:09:01,237 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-25 20:09:01,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:01,247 INFO L225 Difference]: With dead ends: 213 [2021-11-25 20:09:01,247 INFO L226 Difference]: Without dead ends: 99 [2021-11-25 20:09:01,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 20:09:01,254 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:01,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 195 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:09:01,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-25 20:09:01,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-11-25 20:09:01,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.6734693877551021) internal successors, (164), 98 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:01,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 164 transitions. [2021-11-25 20:09:01,297 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 164 transitions. Word has length 8 [2021-11-25 20:09:01,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:01,298 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 164 transitions. [2021-11-25 20:09:01,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:01,298 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 164 transitions. [2021-11-25 20:09:01,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 20:09:01,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:01,300 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:09:01,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:09:01,301 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:01,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:01,304 INFO L85 PathProgramCache]: Analyzing trace with hash 899257357, now seen corresponding path program 1 times [2021-11-25 20:09:01,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:01,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149254132] [2021-11-25 20:09:01,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:01,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:01,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:09:01,397 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:01,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149254132] [2021-11-25 20:09:01,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149254132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:09:01,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:09:01,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:09:01,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570663663] [2021-11-25 20:09:01,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:09:01,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:09:01,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:01,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:09:01,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:09:01,403 INFO L87 Difference]: Start difference. First operand 99 states and 164 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:01,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:01,484 INFO L93 Difference]: Finished difference Result 200 states and 331 transitions. [2021-11-25 20:09:01,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:09:01,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-25 20:09:01,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:01,486 INFO L225 Difference]: With dead ends: 200 [2021-11-25 20:09:01,487 INFO L226 Difference]: Without dead ends: 102 [2021-11-25 20:09:01,487 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 [2021-11-25 20:09:01,489 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 4 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:01,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 305 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:09:01,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-25 20:09:01,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-11-25 20:09:01,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.6534653465346534) internal successors, (167), 101 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:01,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 167 transitions. [2021-11-25 20:09:01,501 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 167 transitions. Word has length 9 [2021-11-25 20:09:01,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:01,501 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 167 transitions. [2021-11-25 20:09:01,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:01,502 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 167 transitions. [2021-11-25 20:09:01,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 20:09:01,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:01,503 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:09:01,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:09:01,504 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:01,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:01,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1778638772, now seen corresponding path program 1 times [2021-11-25 20:09:01,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:01,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592350868] [2021-11-25 20:09:01,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:01,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:01,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:09:01,884 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:01,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592350868] [2021-11-25 20:09:01,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592350868] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:09:01,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:09:01,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:09:01,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571297708] [2021-11-25 20:09:01,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:09:01,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:09:01,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:01,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:09:01,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:09:01,889 INFO L87 Difference]: Start difference. First operand 102 states and 167 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:02,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:02,247 INFO L93 Difference]: Finished difference Result 206 states and 334 transitions. [2021-11-25 20:09:02,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:09:02,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-11-25 20:09:02,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:02,250 INFO L225 Difference]: With dead ends: 206 [2021-11-25 20:09:02,251 INFO L226 Difference]: Without dead ends: 187 [2021-11-25 20:09:02,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:09:02,253 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 254 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:02,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 318 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:09:02,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-25 20:09:02,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 171. [2021-11-25 20:09:02,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.6470588235294117) internal successors, (280), 170 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:02,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 280 transitions. [2021-11-25 20:09:02,268 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 280 transitions. Word has length 14 [2021-11-25 20:09:02,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:02,268 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 280 transitions. [2021-11-25 20:09:02,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:02,269 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 280 transitions. [2021-11-25 20:09:02,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 20:09:02,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:02,270 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:09:02,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:09:02,270 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:02,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:02,271 INFO L85 PathProgramCache]: Analyzing trace with hash 2054474346, now seen corresponding path program 1 times [2021-11-25 20:09:02,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:02,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837813410] [2021-11-25 20:09:02,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:02,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:02,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:09:02,308 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:02,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837813410] [2021-11-25 20:09:02,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837813410] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:09:02,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:09:02,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:09:02,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562596318] [2021-11-25 20:09:02,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:09:02,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:09:02,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:02,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:09:02,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:09:02,311 INFO L87 Difference]: Start difference. First operand 171 states and 280 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:02,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:02,336 INFO L93 Difference]: Finished difference Result 292 states and 476 transitions. [2021-11-25 20:09:02,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:09:02,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-11-25 20:09:02,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:02,338 INFO L225 Difference]: With dead ends: 292 [2021-11-25 20:09:02,338 INFO L226 Difference]: Without dead ends: 123 [2021-11-25 20:09:02,339 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 [2021-11-25 20:09:02,341 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 30 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:02,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 280 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:09:02,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-25 20:09:02,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2021-11-25 20:09:02,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.6083333333333334) internal successors, (193), 120 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:02,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 193 transitions. [2021-11-25 20:09:02,355 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 193 transitions. Word has length 15 [2021-11-25 20:09:02,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:02,355 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 193 transitions. [2021-11-25 20:09:02,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:02,356 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 193 transitions. [2021-11-25 20:09:02,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 20:09:02,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:02,357 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:09:02,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:09:02,357 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:02,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:02,358 INFO L85 PathProgramCache]: Analyzing trace with hash -728910377, now seen corresponding path program 1 times [2021-11-25 20:09:02,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:02,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487585486] [2021-11-25 20:09:02,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:02,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:02,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:09:02,428 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:02,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487585486] [2021-11-25 20:09:02,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487585486] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:09:02,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:09:02,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:09:02,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690717380] [2021-11-25 20:09:02,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:09:02,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:09:02,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:02,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:09:02,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:09:02,431 INFO L87 Difference]: Start difference. First operand 121 states and 193 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:02,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:02,468 INFO L93 Difference]: Finished difference Result 247 states and 394 transitions. [2021-11-25 20:09:02,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:09:02,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 20 [2021-11-25 20:09:02,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:02,470 INFO L225 Difference]: With dead ends: 247 [2021-11-25 20:09:02,470 INFO L226 Difference]: Without dead ends: 128 [2021-11-25 20:09:02,471 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 [2021-11-25 20:09:02,473 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 32 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:02,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 279 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:09:02,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-25 20:09:02,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-11-25 20:09:02,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.584) internal successors, (198), 125 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:02,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 198 transitions. [2021-11-25 20:09:02,481 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 198 transitions. Word has length 20 [2021-11-25 20:09:02,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:02,482 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 198 transitions. [2021-11-25 20:09:02,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:02,482 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 198 transitions. [2021-11-25 20:09:02,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 20:09:02,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:02,483 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:09:02,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:09:02,484 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:02,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:02,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1707782936, now seen corresponding path program 1 times [2021-11-25 20:09:02,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:02,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214332580] [2021-11-25 20:09:02,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:02,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:02,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:02,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:09:02,655 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:02,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214332580] [2021-11-25 20:09:02,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214332580] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:09:02,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502624218] [2021-11-25 20:09:02,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:02,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:02,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96dc758d-5497-48e5-891c-b2716932cbd8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:02,658 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96dc758d-5497-48e5-891c-b2716932cbd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:09:02,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96dc758d-5497-48e5-891c-b2716932cbd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:09:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:02,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:09:02,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:09:02,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:09:02,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:09:02,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:09:02,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502624218] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:09:02,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1987788191] [2021-11-25 20:09:02,997 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 20:09:02,997 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:09:03,001 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:09:03,006 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:09:03,007 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:09:04,915 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:09:08,230 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2124#(and (<= 0 (+ |ULTIMATE.start_main_~P6~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P5~0#1| 2147483648)) (= 6 ~m_recv_ack_1_1~0) (= 2 ~m_msg_2~0) (= ~m_msg_1_1~0 4) (= 7 ~m_recv_ack_1_2~0) (= (ite (and (< |ULTIMATE.start_main_~P1~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P1~0#1| 2) 0))) (+ (mod |ULTIMATE.start_main_~P1~0#1| 2) (- 2)) (mod |ULTIMATE.start_main_~P1~0#1| 2)) 0) (<= |ULTIMATE.start_main_~P3~0#1| 2147483647) (= ~m_msg_1_2~0 5) (<= |ULTIMATE.start_main_~P2~0#1| 2147483647) (= (mod (ite (and (< |ULTIMATE.start_main_~P1~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P1~0#1| 2) 0))) (+ (mod |ULTIMATE.start_main_~P1~0#1| 2) (- 2)) (mod |ULTIMATE.start_main_~P1~0#1| 2)) 4294967296) (mod |ULTIMATE.start_main_~this_expect~0#1| 2)) (<= 0 (+ |ULTIMATE.start_main_~P9~0#1| 2147483648)) (= (mod |ULTIMATE.start_main_~this_buffer_empty~0#1| 4294967296) 1) (= ~m_Protocol~0 1) (<= |ULTIMATE.start_main_~this_expect~0#1| 1) (= 3 |ULTIMATE.start_main_~q~0#1|) (<= 0 (+ |ULTIMATE.start_main_~P1~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P9~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P4~0#1| 2147483647) (<= |ULTIMATE.start_main_~P5~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P7~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P3~0#1| 2147483648)) (= 3 ~m_recv_ack_2~0) (= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~P4~0#1| 2147483648)) (= 2 |ULTIMATE.start_main_~method_id~0#1|) (<= 0 |ULTIMATE.start_main_~this_buffer_empty~0#1|) (<= |ULTIMATE.start_main_~this_buffer_empty~0#1| 1) (<= |ULTIMATE.start_main_~P7~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~this_expect~0#1|) (<= 0 (+ |ULTIMATE.start_main_~P8~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P1~0#1| 2147483647) (<= |ULTIMATE.start_main_~P6~0#1| 2147483647) (<= |ULTIMATE.start_main_~P8~0#1| 2147483647) (= |#NULL.base| 0))' at error location [2021-11-25 20:09:08,230 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:09:08,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:09:08,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-11-25 20:09:08,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527010273] [2021-11-25 20:09:08,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:09:08,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:09:08,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:08,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:09:08,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-11-25 20:09:08,232 INFO L87 Difference]: Start difference. First operand 126 states and 198 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:08,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:08,879 INFO L93 Difference]: Finished difference Result 468 states and 733 transitions. [2021-11-25 20:09:08,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:09:08,880 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 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 22 [2021-11-25 20:09:08,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:08,882 INFO L225 Difference]: With dead ends: 468 [2021-11-25 20:09:08,883 INFO L226 Difference]: Without dead ends: 416 [2021-11-25 20:09:08,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2021-11-25 20:09:08,884 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 1456 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1456 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:08,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1456 Valid, 1184 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:09:08,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-11-25 20:09:08,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 347. [2021-11-25 20:09:08,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.5895953757225434) internal successors, (550), 346 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:08,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 550 transitions. [2021-11-25 20:09:08,904 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 550 transitions. Word has length 22 [2021-11-25 20:09:08,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:08,904 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 550 transitions. [2021-11-25 20:09:08,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:08,905 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 550 transitions. [2021-11-25 20:09:08,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 20:09:08,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:08,906 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:09:08,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96dc758d-5497-48e5-891c-b2716932cbd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:09:09,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96dc758d-5497-48e5-891c-b2716932cbd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 20:09:09,120 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:09,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:09,120 INFO L85 PathProgramCache]: Analyzing trace with hash -2003320486, now seen corresponding path program 1 times [2021-11-25 20:09:09,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:09,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550222731] [2021-11-25 20:09:09,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:09,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:09,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:09:09,222 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:09,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550222731] [2021-11-25 20:09:09,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550222731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:09:09,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:09:09,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:09:09,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524128381] [2021-11-25 20:09:09,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:09:09,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:09:09,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:09,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:09:09,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:09:09,225 INFO L87 Difference]: Start difference. First operand 347 states and 550 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:09,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:09,239 INFO L93 Difference]: Finished difference Result 350 states and 552 transitions. [2021-11-25 20:09:09,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:09:09,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-25 20:09:09,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:09,243 INFO L225 Difference]: With dead ends: 350 [2021-11-25 20:09:09,243 INFO L226 Difference]: Without dead ends: 343 [2021-11-25 20:09:09,243 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 [2021-11-25 20:09:09,247 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 147 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:09,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 161 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:09:09,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-11-25 20:09:09,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 342. [2021-11-25 20:09:09,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.5689149560117301) internal successors, (535), 341 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:09,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 535 transitions. [2021-11-25 20:09:09,267 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 535 transitions. Word has length 26 [2021-11-25 20:09:09,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:09,267 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 535 transitions. [2021-11-25 20:09:09,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:09,268 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 535 transitions. [2021-11-25 20:09:09,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-25 20:09:09,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:09,273 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:09:09,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 20:09:09,273 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:09,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:09,274 INFO L85 PathProgramCache]: Analyzing trace with hash -365408441, now seen corresponding path program 1 times [2021-11-25 20:09:09,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:09,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046573749] [2021-11-25 20:09:09,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:09,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:09,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 20:09:09,338 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:09,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046573749] [2021-11-25 20:09:09,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046573749] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:09:09,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:09:09,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:09:09,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966505310] [2021-11-25 20:09:09,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:09:09,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:09:09,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:09,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:09:09,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:09:09,346 INFO L87 Difference]: Start difference. First operand 342 states and 535 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:09,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:09,377 INFO L93 Difference]: Finished difference Result 582 states and 906 transitions. [2021-11-25 20:09:09,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:09:09,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-25 20:09:09,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:09,380 INFO L225 Difference]: With dead ends: 582 [2021-11-25 20:09:09,380 INFO L226 Difference]: Without dead ends: 242 [2021-11-25 20:09:09,382 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 [2021-11-25 20:09:09,385 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 61 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:09,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 181 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:09:09,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-25 20:09:09,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 240. [2021-11-25 20:09:09,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.506276150627615) internal successors, (360), 239 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:09,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 360 transitions. [2021-11-25 20:09:09,396 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 360 transitions. Word has length 29 [2021-11-25 20:09:09,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:09,398 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 360 transitions. [2021-11-25 20:09:09,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:09,398 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 360 transitions. [2021-11-25 20:09:09,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 20:09:09,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:09,401 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-11-25 20:09:09,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:09:09,402 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:09,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:09,403 INFO L85 PathProgramCache]: Analyzing trace with hash -487022107, now seen corresponding path program 1 times [2021-11-25 20:09:09,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:09,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768426141] [2021-11-25 20:09:09,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:09,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:09,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:09,447 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 20:09:09,448 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:09,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768426141] [2021-11-25 20:09:09,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768426141] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:09:09,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:09:09,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:09:09,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750466093] [2021-11-25 20:09:09,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:09:09,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:09:09,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:09,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:09:09,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:09:09,454 INFO L87 Difference]: Start difference. First operand 240 states and 360 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:09,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:09,480 INFO L93 Difference]: Finished difference Result 423 states and 631 transitions. [2021-11-25 20:09:09,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:09:09,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 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 36 [2021-11-25 20:09:09,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:09,482 INFO L225 Difference]: With dead ends: 423 [2021-11-25 20:09:09,483 INFO L226 Difference]: Without dead ends: 224 [2021-11-25 20:09:09,483 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 [2021-11-25 20:09:09,487 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 28 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:09,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 209 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:09:09,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-11-25 20:09:09,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 222. [2021-11-25 20:09:09,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.4615384615384615) internal successors, (323), 221 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:09,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 323 transitions. [2021-11-25 20:09:09,501 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 323 transitions. Word has length 36 [2021-11-25 20:09:09,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:09,501 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 323 transitions. [2021-11-25 20:09:09,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:09,502 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 323 transitions. [2021-11-25 20:09:09,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 20:09:09,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:09,505 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 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] [2021-11-25 20:09:09,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 20:09:09,505 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:09,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:09,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1378383767, now seen corresponding path program 1 times [2021-11-25 20:09:09,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:09,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897224499] [2021-11-25 20:09:09,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:09,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:09,576 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-25 20:09:09,576 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:09,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897224499] [2021-11-25 20:09:09,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897224499] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:09:09,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:09:09,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:09:09,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398678286] [2021-11-25 20:09:09,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:09:09,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:09:09,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:09,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:09:09,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:09:09,580 INFO L87 Difference]: Start difference. First operand 222 states and 323 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:09,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:09,603 INFO L93 Difference]: Finished difference Result 304 states and 441 transitions. [2021-11-25 20:09:09,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:09:09,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 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 45 [2021-11-25 20:09:09,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:09,605 INFO L225 Difference]: With dead ends: 304 [2021-11-25 20:09:09,605 INFO L226 Difference]: Without dead ends: 142 [2021-11-25 20:09:09,606 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 [2021-11-25 20:09:09,607 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 27 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:09,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 181 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:09:09,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-25 20:09:09,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2021-11-25 20:09:09,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.4244604316546763) internal successors, (198), 139 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:09,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 198 transitions. [2021-11-25 20:09:09,614 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 198 transitions. Word has length 45 [2021-11-25 20:09:09,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:09,633 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 198 transitions. [2021-11-25 20:09:09,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:09,634 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 198 transitions. [2021-11-25 20:09:09,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-25 20:09:09,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:09,636 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:09:09,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 20:09:09,640 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:09,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:09,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1173572958, now seen corresponding path program 1 times [2021-11-25 20:09:09,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:09,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120475421] [2021-11-25 20:09:09,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:09,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:09,825 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 20:09:09,825 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:09,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120475421] [2021-11-25 20:09:09,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120475421] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:09:09,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421237290] [2021-11-25 20:09:09,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:09,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:09,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96dc758d-5497-48e5-891c-b2716932cbd8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:09,827 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96dc758d-5497-48e5-891c-b2716932cbd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:09:09,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96dc758d-5497-48e5-891c-b2716932cbd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:09:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:09,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 20:09:09,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:09:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:09:10,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:09:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:09:10,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421237290] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:09:10,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1257552822] [2021-11-25 20:09:10,427 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2021-11-25 20:09:10,427 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:09:10,427 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:09:10,427 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:09:10,428 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:09:13,207 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:09:17,107 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6098#(and (<= 0 (+ |ULTIMATE.start_main_~P6~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P5~0#1| 2147483648)) (= 6 ~m_recv_ack_1_1~0) (= 2 ~m_msg_2~0) (= ~m_msg_1_1~0 4) (= 7 ~m_recv_ack_1_2~0) (= (mod |ULTIMATE.start_main_~P3~0#1| 4294967296) (mod (+ |ULTIMATE.start_main_~this_expect~0#1| 1) 2)) (= ~m_msg_1_2~0 5) (<= |ULTIMATE.start_main_~P2~0#1| 2147483647) (not (= (mod |ULTIMATE.start_main_~this_buffer_empty~0#1| 4294967296) 1)) (= 3 |ULTIMATE.start_main_~method_id~0#1|) (<= 0 (+ |ULTIMATE.start_main_~P9~0#1| 2147483648)) (<= 1 |ULTIMATE.start_main_~this_expect~0#1|) (= |ULTIMATE.start_main_~P1~0#1| 0) (= ~m_Protocol~0 1) (<= |ULTIMATE.start_main_~P9~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P4~0#1| 2147483647) (<= |ULTIMATE.start_main_~P5~0#1| 2147483647) (= 5 |ULTIMATE.start_main_~q~0#1|) (<= 0 (+ |ULTIMATE.start_main_~P7~0#1| 2147483648)) (= |ULTIMATE.start_main_~P3~0#1| 0) (= 3 ~m_recv_ack_2~0) (= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~P4~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P7~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_main_~P8~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P6~0#1| 2147483647) (<= |ULTIMATE.start_main_~P8~0#1| 2147483647) (= |#NULL.base| 0))' at error location [2021-11-25 20:09:17,107 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:09:17,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:09:17,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2021-11-25 20:09:17,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418234117] [2021-11-25 20:09:17,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:09:17,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 20:09:17,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:17,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 20:09:17,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1533, Unknown=0, NotChecked=0, Total=1806 [2021-11-25 20:09:17,111 INFO L87 Difference]: Start difference. First operand 140 states and 198 transitions. Second operand has 14 states, 14 states have (on average 8.571428571428571) internal successors, (120), 14 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:17,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:17,314 INFO L93 Difference]: Finished difference Result 162 states and 230 transitions. [2021-11-25 20:09:17,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:09:17,314 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.571428571428571) internal successors, (120), 14 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-25 20:09:17,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:17,315 INFO L225 Difference]: With dead ends: 162 [2021-11-25 20:09:17,315 INFO L226 Difference]: Without dead ends: 0 [2021-11-25 20:09:17,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=317, Invalid=1939, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 20:09:17,317 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 569 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:17,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [569 Valid, 617 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:09:17,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-25 20:09:17,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-25 20:09:17,318 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) [2021-11-25 20:09:17,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-25 20:09:17,318 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2021-11-25 20:09:17,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:17,319 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-25 20:09:17,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.571428571428571) internal successors, (120), 14 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:17,319 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-25 20:09:17,319 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-25 20:09:17,322 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 20:09:17,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96dc758d-5497-48e5-891c-b2716932cbd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:09:17,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96dc758d-5497-48e5-891c-b2716932cbd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:17,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-25 20:09:17,843 INFO L858 garLoopResultBuilder]: For program point L432(lines 432 434) no Hoare annotation was computed. [2021-11-25 20:09:17,843 INFO L858 garLoopResultBuilder]: For program point L300(lines 300 302) no Hoare annotation was computed. [2021-11-25 20:09:17,843 INFO L858 garLoopResultBuilder]: For program point L168(lines 168 170) no Hoare annotation was computed. [2021-11-25 20:09:17,843 INFO L858 garLoopResultBuilder]: For program point L532(lines 532 534) no Hoare annotation was computed. [2021-11-25 20:09:17,843 INFO L858 garLoopResultBuilder]: For program point L400(lines 400 402) no Hoare annotation was computed. [2021-11-25 20:09:17,843 INFO L858 garLoopResultBuilder]: For program point L268(lines 268 270) no Hoare annotation was computed. [2021-11-25 20:09:17,843 INFO L858 garLoopResultBuilder]: For program point L500(lines 500 502) no Hoare annotation was computed. [2021-11-25 20:09:17,843 INFO L858 garLoopResultBuilder]: For program point L368(lines 368 370) no Hoare annotation was computed. [2021-11-25 20:09:17,843 INFO L858 garLoopResultBuilder]: For program point L468(lines 468 470) no Hoare annotation was computed. [2021-11-25 20:09:17,843 INFO L858 garLoopResultBuilder]: For program point L41(lines 41 60) no Hoare annotation was computed. [2021-11-25 20:09:17,843 INFO L858 garLoopResultBuilder]: For program point L42(lines 42 57) no Hoare annotation was computed. [2021-11-25 20:09:17,844 INFO L858 garLoopResultBuilder]: For program point L142(lines 142 157) no Hoare annotation was computed. [2021-11-25 20:09:17,844 INFO L858 garLoopResultBuilder]: For program point L242(lines 242 257) no Hoare annotation was computed. [2021-11-25 20:09:17,844 INFO L858 garLoopResultBuilder]: For program point L110(lines 110 125) no Hoare annotation was computed. [2021-11-25 20:09:17,844 INFO L858 garLoopResultBuilder]: For program point L44(lines 44 55) no Hoare annotation was computed. [2021-11-25 20:09:17,844 INFO L858 garLoopResultBuilder]: For program point L342(lines 342 357) no Hoare annotation was computed. [2021-11-25 20:09:17,844 INFO L858 garLoopResultBuilder]: For program point L210(lines 210 225) no Hoare annotation was computed. [2021-11-25 20:09:17,844 INFO L858 garLoopResultBuilder]: For program point L144(lines 144 155) no Hoare annotation was computed. [2021-11-25 20:09:17,844 INFO L858 garLoopResultBuilder]: For program point L78(lines 78 93) no Hoare annotation was computed. [2021-11-25 20:09:17,844 INFO L858 garLoopResultBuilder]: For program point L442(lines 442 457) no Hoare annotation was computed. [2021-11-25 20:09:17,845 INFO L858 garLoopResultBuilder]: For program point L310(lines 310 325) no Hoare annotation was computed. [2021-11-25 20:09:17,845 INFO L858 garLoopResultBuilder]: For program point L244(lines 244 255) no Hoare annotation was computed. [2021-11-25 20:09:17,845 INFO L858 garLoopResultBuilder]: For program point L178(lines 178 193) no Hoare annotation was computed. [2021-11-25 20:09:17,845 INFO L858 garLoopResultBuilder]: For program point L112(lines 112 123) no Hoare annotation was computed. [2021-11-25 20:09:17,845 INFO L858 garLoopResultBuilder]: For program point L542(lines 542 557) no Hoare annotation was computed. [2021-11-25 20:09:17,845 INFO L858 garLoopResultBuilder]: For program point L410(lines 410 425) no Hoare annotation was computed. [2021-11-25 20:09:17,845 INFO L858 garLoopResultBuilder]: For program point L344(lines 344 355) no Hoare annotation was computed. [2021-11-25 20:09:17,846 INFO L858 garLoopResultBuilder]: For program point L278(lines 278 293) no Hoare annotation was computed. [2021-11-25 20:09:17,846 INFO L858 garLoopResultBuilder]: For program point L212(lines 212 223) no Hoare annotation was computed. [2021-11-25 20:09:17,847 INFO L858 garLoopResultBuilder]: For program point L80(lines 80 91) no Hoare annotation was computed. [2021-11-25 20:09:17,847 INFO L858 garLoopResultBuilder]: For program point L510(lines 510 525) no Hoare annotation was computed. [2021-11-25 20:09:17,847 INFO L858 garLoopResultBuilder]: For program point L444(lines 444 455) no Hoare annotation was computed. [2021-11-25 20:09:17,847 INFO L858 garLoopResultBuilder]: For program point L378(lines 378 393) no Hoare annotation was computed. [2021-11-25 20:09:17,847 INFO L858 garLoopResultBuilder]: For program point L312(lines 312 323) no Hoare annotation was computed. [2021-11-25 20:09:17,847 INFO L858 garLoopResultBuilder]: For program point L180(lines 180 191) no Hoare annotation was computed. [2021-11-25 20:09:17,847 INFO L858 garLoopResultBuilder]: For program point L48(lines 48 50) no Hoare annotation was computed. [2021-11-25 20:09:17,848 INFO L858 garLoopResultBuilder]: For program point L544(lines 544 555) no Hoare annotation was computed. [2021-11-25 20:09:17,848 INFO L858 garLoopResultBuilder]: For program point L478(lines 478 493) no Hoare annotation was computed. [2021-11-25 20:09:17,848 INFO L858 garLoopResultBuilder]: For program point L412(lines 412 423) no Hoare annotation was computed. [2021-11-25 20:09:17,849 INFO L858 garLoopResultBuilder]: For program point L280(lines 280 291) no Hoare annotation was computed. [2021-11-25 20:09:17,849 INFO L858 garLoopResultBuilder]: For program point L148(lines 148 150) no Hoare annotation was computed. [2021-11-25 20:09:17,849 INFO L861 garLoopResultBuilder]: At program point L16(lines 16 568) the Hoare annotation is: true [2021-11-25 20:09:17,849 INFO L858 garLoopResultBuilder]: For program point L512(lines 512 523) no Hoare annotation was computed. [2021-11-25 20:09:17,849 INFO L858 garLoopResultBuilder]: For program point L380(lines 380 391) no Hoare annotation was computed. [2021-11-25 20:09:17,850 INFO L858 garLoopResultBuilder]: For program point L248(lines 248 250) no Hoare annotation was computed. [2021-11-25 20:09:17,850 INFO L858 garLoopResultBuilder]: For program point L116(lines 116 118) no Hoare annotation was computed. [2021-11-25 20:09:17,850 INFO L858 garLoopResultBuilder]: For program point L480(lines 480 491) no Hoare annotation was computed. [2021-11-25 20:09:17,850 INFO L858 garLoopResultBuilder]: For program point L348(lines 348 350) no Hoare annotation was computed. [2021-11-25 20:09:17,850 INFO L858 garLoopResultBuilder]: For program point L216(lines 216 218) no Hoare annotation was computed. [2021-11-25 20:09:17,850 INFO L858 garLoopResultBuilder]: For program point L84(lines 84 86) no Hoare annotation was computed. [2021-11-25 20:09:17,850 INFO L858 garLoopResultBuilder]: For program point L448(lines 448 450) no Hoare annotation was computed. [2021-11-25 20:09:17,851 INFO L858 garLoopResultBuilder]: For program point L316(lines 316 318) no Hoare annotation was computed. [2021-11-25 20:09:17,851 INFO L858 garLoopResultBuilder]: For program point L184(lines 184 186) no Hoare annotation was computed. [2021-11-25 20:09:17,851 INFO L858 garLoopResultBuilder]: For program point L548(lines 548 550) no Hoare annotation was computed. [2021-11-25 20:09:17,851 INFO L858 garLoopResultBuilder]: For program point L416(lines 416 418) no Hoare annotation was computed. [2021-11-25 20:09:17,851 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-25 20:09:17,851 INFO L858 garLoopResultBuilder]: For program point L284(lines 284 286) no Hoare annotation was computed. [2021-11-25 20:09:17,851 INFO L854 garLoopResultBuilder]: At program point L549(lines 16 568) the Hoare annotation is: false [2021-11-25 20:09:17,852 INFO L858 garLoopResultBuilder]: For program point L516(lines 516 518) no Hoare annotation was computed. [2021-11-25 20:09:17,852 INFO L858 garLoopResultBuilder]: For program point L384(lines 384 386) no Hoare annotation was computed. [2021-11-25 20:09:17,852 INFO L858 garLoopResultBuilder]: For program point L484(lines 484 486) no Hoare annotation was computed. [2021-11-25 20:09:17,852 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-25 20:09:17,852 INFO L854 garLoopResultBuilder]: At program point L26-2(lines 26 563) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~this_buffer_empty~0#1| 0))) (or (and .cse0 (<= (div |ULTIMATE.start_main_~P8~0#1| 4294967296) 0) (<= 5 |ULTIMATE.start_main_~q~0#1|) (<= |ULTIMATE.start_main_~this_expect~0#1| (+ (* 2 (div (+ (- 2) |ULTIMATE.start_main_~this_expect~0#1|) 2)) 2)) (<= 0 (+ |ULTIMATE.start_main_~P8~0#1| 2147483648))) (and (= |ULTIMATE.start_main_~this_expect~0#1| 0) .cse0 (= |ULTIMATE.start_main_~q~0#1| 0)))) [2021-11-25 20:09:17,852 INFO L858 garLoopResultBuilder]: For program point L26-3(lines 26 563) no Hoare annotation was computed. [2021-11-25 20:09:17,852 INFO L858 garLoopResultBuilder]: For program point L126(lines 126 141) no Hoare annotation was computed. [2021-11-25 20:09:17,853 INFO L858 garLoopResultBuilder]: For program point L226(lines 226 241) no Hoare annotation was computed. [2021-11-25 20:09:17,853 INFO L858 garLoopResultBuilder]: For program point L94(lines 94 109) no Hoare annotation was computed. [2021-11-25 20:09:17,853 INFO L858 garLoopResultBuilder]: For program point L61(lines 61 160) no Hoare annotation was computed. [2021-11-25 20:09:17,853 INFO L858 garLoopResultBuilder]: For program point L326(lines 326 341) no Hoare annotation was computed. [2021-11-25 20:09:17,854 INFO L858 garLoopResultBuilder]: For program point L194(lines 194 209) no Hoare annotation was computed. [2021-11-25 20:09:17,854 INFO L858 garLoopResultBuilder]: For program point L161(lines 161 260) no Hoare annotation was computed. [2021-11-25 20:09:17,854 INFO L858 garLoopResultBuilder]: For program point L128(lines 128 139) no Hoare annotation was computed. [2021-11-25 20:09:17,854 INFO L858 garLoopResultBuilder]: For program point L62(lines 62 77) no Hoare annotation was computed. [2021-11-25 20:09:17,855 INFO L858 garLoopResultBuilder]: For program point L426(lines 426 441) no Hoare annotation was computed. [2021-11-25 20:09:17,855 INFO L858 garLoopResultBuilder]: For program point L294(lines 294 309) no Hoare annotation was computed. [2021-11-25 20:09:17,855 INFO L858 garLoopResultBuilder]: For program point L261(lines 261 360) no Hoare annotation was computed. [2021-11-25 20:09:17,855 INFO L858 garLoopResultBuilder]: For program point L228(lines 228 239) no Hoare annotation was computed. [2021-11-25 20:09:17,855 INFO L858 garLoopResultBuilder]: For program point L162(lines 162 177) no Hoare annotation was computed. [2021-11-25 20:09:17,855 INFO L858 garLoopResultBuilder]: For program point L96(lines 96 107) no Hoare annotation was computed. [2021-11-25 20:09:17,856 INFO L854 garLoopResultBuilder]: At program point L559(lines 26 563) the Hoare annotation is: (let ((.cse3 (= |ULTIMATE.start_main_~this_buffer_empty~0#1| 1)) (.cse1 (<= |ULTIMATE.start_main_~this_expect~0#1| (+ (* 2 (div (+ (- 1) |ULTIMATE.start_main_~this_expect~0#1|) 2)) 1))) (.cse0 (<= (div |ULTIMATE.start_main_~P8~0#1| 4294967296) 0)) (.cse4 (<= |ULTIMATE.start_main_~this_expect~0#1| (+ (* 2 (div (+ (- 2) |ULTIMATE.start_main_~this_expect~0#1|) 2)) 2))) (.cse2 (<= 0 (+ |ULTIMATE.start_main_~P8~0#1| 2147483648))) (.cse5 (= |ULTIMATE.start_main_~this_buffer_empty~0#1| 0))) (or (and .cse0 (= |ULTIMATE.start_main_~q~0#1| 4) .cse1 .cse2 .cse3) (and .cse0 (= |ULTIMATE.start_main_~q~0#1| 1) .cse4 .cse2 .cse3) (and .cse5 .cse0 (= 3 |ULTIMATE.start_main_~q~0#1|) .cse1 .cse2) (and .cse5 .cse0 (<= 5 |ULTIMATE.start_main_~q~0#1|) .cse4 .cse2) (and (= |ULTIMATE.start_main_~this_expect~0#1| 0) .cse5 (= |ULTIMATE.start_main_~q~0#1| 0)))) [2021-11-25 20:09:17,856 INFO L858 garLoopResultBuilder]: For program point L526(lines 526 541) no Hoare annotation was computed. [2021-11-25 20:09:17,856 INFO L858 garLoopResultBuilder]: For program point L394(lines 394 409) no Hoare annotation was computed. [2021-11-25 20:09:17,856 INFO L858 garLoopResultBuilder]: For program point L361(lines 361 460) no Hoare annotation was computed. [2021-11-25 20:09:17,856 INFO L858 garLoopResultBuilder]: For program point L328(lines 328 339) no Hoare annotation was computed. [2021-11-25 20:09:17,856 INFO L858 garLoopResultBuilder]: For program point L262(lines 262 277) no Hoare annotation was computed. [2021-11-25 20:09:17,856 INFO L858 garLoopResultBuilder]: For program point L196(lines 196 207) no Hoare annotation was computed. [2021-11-25 20:09:17,857 INFO L858 garLoopResultBuilder]: For program point L64(lines 64 75) no Hoare annotation was computed. [2021-11-25 20:09:17,857 INFO L858 garLoopResultBuilder]: For program point L494(lines 494 509) no Hoare annotation was computed. [2021-11-25 20:09:17,857 INFO L858 garLoopResultBuilder]: For program point L461(lines 461 560) no Hoare annotation was computed. [2021-11-25 20:09:17,857 INFO L858 garLoopResultBuilder]: For program point L428(lines 428 439) no Hoare annotation was computed. [2021-11-25 20:09:17,857 INFO L858 garLoopResultBuilder]: For program point L362(lines 362 377) no Hoare annotation was computed. [2021-11-25 20:09:17,857 INFO L858 garLoopResultBuilder]: For program point L296(lines 296 307) no Hoare annotation was computed. [2021-11-25 20:09:17,857 INFO L858 garLoopResultBuilder]: For program point L164(lines 164 175) no Hoare annotation was computed. [2021-11-25 20:09:17,858 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 567) no Hoare annotation was computed. [2021-11-25 20:09:17,859 INFO L858 garLoopResultBuilder]: For program point L528(lines 528 539) no Hoare annotation was computed. [2021-11-25 20:09:17,859 INFO L858 garLoopResultBuilder]: For program point L462(lines 462 477) no Hoare annotation was computed. [2021-11-25 20:09:17,859 INFO L858 garLoopResultBuilder]: For program point L396(lines 396 407) no Hoare annotation was computed. [2021-11-25 20:09:17,860 INFO L858 garLoopResultBuilder]: For program point L264(lines 264 275) no Hoare annotation was computed. [2021-11-25 20:09:17,860 INFO L858 garLoopResultBuilder]: For program point L132(lines 132 134) no Hoare annotation was computed. [2021-11-25 20:09:17,860 INFO L858 garLoopResultBuilder]: For program point L496(lines 496 507) no Hoare annotation was computed. [2021-11-25 20:09:17,860 INFO L858 garLoopResultBuilder]: For program point L364(lines 364 375) no Hoare annotation was computed. [2021-11-25 20:09:17,860 INFO L858 garLoopResultBuilder]: For program point L232(lines 232 234) no Hoare annotation was computed. [2021-11-25 20:09:17,860 INFO L858 garLoopResultBuilder]: For program point L100(lines 100 102) no Hoare annotation was computed. [2021-11-25 20:09:17,860 INFO L858 garLoopResultBuilder]: For program point L464(lines 464 475) no Hoare annotation was computed. [2021-11-25 20:09:17,861 INFO L858 garLoopResultBuilder]: For program point L332(lines 332 334) no Hoare annotation was computed. [2021-11-25 20:09:17,861 INFO L858 garLoopResultBuilder]: For program point L200(lines 200 202) no Hoare annotation was computed. [2021-11-25 20:09:17,861 INFO L858 garLoopResultBuilder]: For program point L68(lines 68 70) no Hoare annotation was computed. [2021-11-25 20:09:17,863 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:09:17,865 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 20:09:17,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:09:17 BoogieIcfgContainer [2021-11-25 20:09:17,889 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 20:09:17,890 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 20:09:17,890 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 20:09:17,890 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 20:09:17,890 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:09:00" (3/4) ... [2021-11-25 20:09:17,893 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-25 20:09:17,909 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-11-25 20:09:17,909 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-25 20:09:17,910 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-25 20:09:17,910 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-25 20:09:17,937 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96dc758d-5497-48e5-891c-b2716932cbd8/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 20:09:17,937 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 20:09:17,938 INFO L158 Benchmark]: Toolchain (without parser) took 18749.44ms. Allocated memory was 98.6MB in the beginning and 268.4MB in the end (delta: 169.9MB). Free memory was 64.9MB in the beginning and 228.5MB in the end (delta: -163.5MB). Peak memory consumption was 4.5MB. Max. memory is 16.1GB. [2021-11-25 20:09:17,938 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 98.6MB. Free memory was 52.0MB in the beginning and 52.0MB in the end (delta: 47.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:09:17,939 INFO L158 Benchmark]: CACSL2BoogieTranslator took 479.22ms. Allocated memory is still 98.6MB. Free memory was 64.7MB in the beginning and 65.7MB in the end (delta: -1.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 20:09:17,939 INFO L158 Benchmark]: Boogie Procedure Inliner took 80.97ms. Allocated memory is still 98.6MB. Free memory was 65.7MB in the beginning and 60.7MB in the end (delta: 5.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-25 20:09:17,940 INFO L158 Benchmark]: Boogie Preprocessor took 68.14ms. Allocated memory is still 98.6MB. Free memory was 60.7MB in the beginning and 58.1MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:09:17,940 INFO L158 Benchmark]: RCFGBuilder took 1039.74ms. Allocated memory was 98.6MB in the beginning and 121.6MB in the end (delta: 23.1MB). Free memory was 57.7MB in the beginning and 84.8MB in the end (delta: -27.1MB). Peak memory consumption was 27.9MB. Max. memory is 16.1GB. [2021-11-25 20:09:17,941 INFO L158 Benchmark]: TraceAbstraction took 17013.94ms. Allocated memory was 121.6MB in the beginning and 268.4MB in the end (delta: 146.8MB). Free memory was 84.8MB in the beginning and 231.6MB in the end (delta: -146.8MB). Peak memory consumption was 151.1MB. Max. memory is 16.1GB. [2021-11-25 20:09:17,941 INFO L158 Benchmark]: Witness Printer took 47.70ms. Allocated memory is still 268.4MB. Free memory was 231.6MB in the beginning and 228.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:09:17,944 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 98.6MB. Free memory was 52.0MB in the beginning and 52.0MB in the end (delta: 47.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 479.22ms. Allocated memory is still 98.6MB. Free memory was 64.7MB in the beginning and 65.7MB in the end (delta: -1.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 80.97ms. Allocated memory is still 98.6MB. Free memory was 65.7MB in the beginning and 60.7MB in the end (delta: 5.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 68.14ms. Allocated memory is still 98.6MB. Free memory was 60.7MB in the beginning and 58.1MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1039.74ms. Allocated memory was 98.6MB in the beginning and 121.6MB in the end (delta: 23.1MB). Free memory was 57.7MB in the beginning and 84.8MB in the end (delta: -27.1MB). Peak memory consumption was 27.9MB. Max. memory is 16.1GB. * TraceAbstraction took 17013.94ms. Allocated memory was 121.6MB in the beginning and 268.4MB in the end (delta: 146.8MB). Free memory was 84.8MB in the beginning and 231.6MB in the end (delta: -146.8MB). Peak memory consumption was 151.1MB. Max. memory is 16.1GB. * Witness Printer took 47.70ms. Allocated memory is still 268.4MB. Free memory was 231.6MB in the beginning and 228.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. 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: 567]: 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, 107 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 16.9s, OverallIterations: 11, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2608 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2608 mSDsluCounter, 3910 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2146 mSDsCounter, 219 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 600 IncrementalHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 219 mSolverCounterUnsat, 1764 mSDtfsCounter, 600 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 7.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=347occurred in iteration=6, InterpolantAutomatonStates: 49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 96 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 17 NumberOfFragments, 164 HoareAnnotationTreeSize, 4 FomulaSimplifications, 236 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 426 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 338 NumberOfCodeBlocks, 338 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 391 ConstructedInterpolants, 0 QuantifiedInterpolants, 2269 SizeOfPredicates, 7 NumberOfNonLiveVariables, 542 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 15 InterpolantComputations, 9 PerfectInterpolantSequences, 132/211 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: 16]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: (((((((P8 / 4294967296 <= 0 && q == 4) && this_expect <= 2 * ((-1 + this_expect) / 2) + 1) && 0 <= P8 + 2147483648) && this_buffer_empty == 1) || ((((P8 / 4294967296 <= 0 && q == 1) && this_expect <= 2 * ((-2 + this_expect) / 2) + 2) && 0 <= P8 + 2147483648) && this_buffer_empty == 1)) || ((((this_buffer_empty == 0 && P8 / 4294967296 <= 0) && 3 == q) && this_expect <= 2 * ((-1 + this_expect) / 2) + 1) && 0 <= P8 + 2147483648)) || ((((this_buffer_empty == 0 && P8 / 4294967296 <= 0) && 5 <= q) && this_expect <= 2 * ((-2 + this_expect) / 2) + 2) && 0 <= P8 + 2147483648)) || ((this_expect == 0 && this_buffer_empty == 0) && q == 0) - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: ((((this_buffer_empty == 0 && P8 / 4294967296 <= 0) && 5 <= q) && this_expect <= 2 * ((-2 + this_expect) / 2) + 2) && 0 <= P8 + 2147483648) || ((this_expect == 0 && this_buffer_empty == 0) && q == 0) - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: 0 RESULT: Ultimate proved your program to be correct! [2021-11-25 20:09:17,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96dc758d-5497-48e5-891c-b2716932cbd8/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE