./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/pipeline.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/pipeline.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c42f0f019aa30bac52b753d657fd0a7a27ad0fcef5ea61d179259276789b8861 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:45:24,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:45:24,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:45:24,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:45:24,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:45:24,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:45:24,137 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:45:24,142 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:45:24,145 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:45:24,154 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:45:24,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:45:24,157 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:45:24,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:45:24,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:45:24,163 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:45:24,166 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:45:24,168 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:45:24,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:45:24,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:45:24,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:45:24,191 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:45:24,192 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:45:24,194 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:45:24,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:45:24,202 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:45:24,202 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:45:24,203 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:45:24,205 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:45:24,205 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:45:24,207 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:45:24,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:45:24,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:45:24,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:45:24,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:45:24,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:45:24,214 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:45:24,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:45:24,215 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:45:24,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:45:24,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:45:24,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:45:24,218 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:45:24,259 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:45:24,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:45:24,264 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:45:24,264 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:45:24,265 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:45:24,266 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:45:24,266 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:45:24,266 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:45:24,266 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:45:24,267 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:45:24,268 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:45:24,268 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:45:24,268 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:45:24,269 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:45:24,269 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:45:24,269 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:45:24,269 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:45:24,270 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:45:24,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:45:24,271 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:45:24,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:45:24,272 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:45:24,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:45:24,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:45:24,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:45:24,273 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:45:24,275 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:45:24,275 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:45:24,275 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:45:24,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:45:24,276 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:45:24,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:45:24,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:45:24,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:45:24,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:45:24,277 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:45:24,277 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:45:24,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:45:24,278 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:45:24,278 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:45:24,278 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:45:24,278 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_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c42f0f019aa30bac52b753d657fd0a7a27ad0fcef5ea61d179259276789b8861 [2021-11-21 00:45:24,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:45:24,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:45:24,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:45:24,584 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:45:24,585 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:45:24,586 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/systemc/pipeline.cil-2.c [2021-11-21 00:45:24,660 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/data/ea7675ffe/a9b6518d62c04e959337066b6e05dfda/FLAG2fd296868 [2021-11-21 00:45:25,128 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:45:25,128 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/sv-benchmarks/c/systemc/pipeline.cil-2.c [2021-11-21 00:45:25,138 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/data/ea7675ffe/a9b6518d62c04e959337066b6e05dfda/FLAG2fd296868 [2021-11-21 00:45:25,503 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/data/ea7675ffe/a9b6518d62c04e959337066b6e05dfda [2021-11-21 00:45:25,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:45:25,507 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:45:25,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:45:25,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:45:25,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:45:25,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:45:25" (1/1) ... [2021-11-21 00:45:25,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21c77ce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:25, skipping insertion in model container [2021-11-21 00:45:25,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:45:25" (1/1) ... [2021-11-21 00:45:25,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:45:25,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:45:25,730 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_29d37ef8-20fb-47de-921d-1f1b04d8ff93/sv-benchmarks/c/systemc/pipeline.cil-2.c[640,653] [2021-11-21 00:45:25,853 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:45:25,863 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:45:25,874 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_29d37ef8-20fb-47de-921d-1f1b04d8ff93/sv-benchmarks/c/systemc/pipeline.cil-2.c[640,653] [2021-11-21 00:45:25,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:45:25,931 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:45:25,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:25 WrapperNode [2021-11-21 00:45:25,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:45:25,933 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:45:25,933 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:45:25,933 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:45:25,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:25" (1/1) ... [2021-11-21 00:45:25,951 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:25" (1/1) ... [2021-11-21 00:45:26,004 INFO L137 Inliner]: procedures = 20, calls = 17, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 422 [2021-11-21 00:45:26,005 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:45:26,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:45:26,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:45:26,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:45:26,013 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:25" (1/1) ... [2021-11-21 00:45:26,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:25" (1/1) ... [2021-11-21 00:45:26,017 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:25" (1/1) ... [2021-11-21 00:45:26,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:25" (1/1) ... [2021-11-21 00:45:26,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:25" (1/1) ... [2021-11-21 00:45:26,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:25" (1/1) ... [2021-11-21 00:45:26,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:25" (1/1) ... [2021-11-21 00:45:26,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:45:26,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:45:26,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:45:26,071 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:45:26,072 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:25" (1/1) ... [2021-11-21 00:45:26,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:45:26,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:45:26,105 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:45:26,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:45:26,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:45:26,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:45:26,146 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2021-11-21 00:45:26,146 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2021-11-21 00:45:26,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:45:26,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:45:26,232 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:45:26,234 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:45:26,813 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:45:27,258 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:45:27,259 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 00:45:27,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:45:27 BoogieIcfgContainer [2021-11-21 00:45:27,262 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:45:27,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:45:27,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:45:27,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:45:27,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:45:25" (1/3) ... [2021-11-21 00:45:27,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bee2c06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:45:27, skipping insertion in model container [2021-11-21 00:45:27,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:25" (2/3) ... [2021-11-21 00:45:27,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bee2c06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:45:27, skipping insertion in model container [2021-11-21 00:45:27,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:45:27" (3/3) ... [2021-11-21 00:45:27,270 INFO L111 eAbstractionObserver]: Analyzing ICFG pipeline.cil-2.c [2021-11-21 00:45:27,275 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:45:27,275 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:45:27,317 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:45:27,324 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:45:27,325 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:45:27,342 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 26 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 00:45:27,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 00:45:27,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:45:27,348 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:45:27,349 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:45:27,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:45:27,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1030469667, now seen corresponding path program 1 times [2021-11-21 00:45:27,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:45:27,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122875667] [2021-11-21 00:45:27,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:45:27,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:45:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:27,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:45:27,604 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:45:27,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122875667] [2021-11-21 00:45:27,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122875667] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:45:27,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142760462] [2021-11-21 00:45:27,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:45:27,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:45:27,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:45:27,608 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:45:27,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:45:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:27,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-21 00:45:27,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:45:27,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:45:27,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:45:27,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142760462] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:45:27,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:45:27,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-21 00:45:27,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311546764] [2021-11-21 00:45:27,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:45:27,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 00:45:27,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:45:27,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 00:45:27,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:45:27,942 INFO L87 Difference]: Start difference. First operand has 30 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 26 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:45:28,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:45:28,024 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2021-11-21 00:45:28,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 00:45:28,027 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-11-21 00:45:28,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:45:28,035 INFO L225 Difference]: With dead ends: 57 [2021-11-21 00:45:28,036 INFO L226 Difference]: Without dead ends: 29 [2021-11-21 00:45:28,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:45:28,045 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:45:28,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:45:28,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-21 00:45:28,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-21 00:45:28,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 00:45:28,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 42 transitions. [2021-11-21 00:45:28,103 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 42 transitions. Word has length 16 [2021-11-21 00:45:28,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:45:28,103 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 42 transitions. [2021-11-21 00:45:28,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:45:28,104 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 42 transitions. [2021-11-21 00:45:28,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-21 00:45:28,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:45:28,107 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:45:28,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:45:28,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-21 00:45:28,334 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:45:28,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:45:28,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1095063889, now seen corresponding path program 1 times [2021-11-21 00:45:28,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:45:28,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542067005] [2021-11-21 00:45:28,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:45:28,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:45:28,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:28,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:45:28,806 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:45:28,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542067005] [2021-11-21 00:45:28,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542067005] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:45:28,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049942032] [2021-11-21 00:45:28,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:45:28,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:45:28,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:45:28,816 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:45:28,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:45:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:29,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:45:29,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:45:29,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 00:45:29,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:45:29,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049942032] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:45:29,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:45:29,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2021-11-21 00:45:29,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963491349] [2021-11-21 00:45:29,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:45:29,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:45:29,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:45:29,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:45:29,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:45:29,203 INFO L87 Difference]: Start difference. First operand 29 states and 42 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 00:45:29,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:45:29,289 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2021-11-21 00:45:29,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:45:29,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2021-11-21 00:45:29,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:45:29,293 INFO L225 Difference]: With dead ends: 67 [2021-11-21 00:45:29,294 INFO L226 Difference]: Without dead ends: 40 [2021-11-21 00:45:29,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:45:29,298 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 5 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:45:29,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 73 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:45:29,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-21 00:45:29,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2021-11-21 00:45:29,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 29 states have internal predecessors, (40), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 00:45:29,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 50 transitions. [2021-11-21 00:45:29,320 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 50 transitions. Word has length 40 [2021-11-21 00:45:29,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:45:29,321 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 50 transitions. [2021-11-21 00:45:29,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 00:45:29,321 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 50 transitions. [2021-11-21 00:45:29,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-21 00:45:29,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:45:29,329 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:45:29,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:45:29,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:45:29,552 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:45:29,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:45:29,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1023532891, now seen corresponding path program 1 times [2021-11-21 00:45:29,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:45:29,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046833319] [2021-11-21 00:45:29,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:45:29,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:45:29,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:29,934 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 2 proven. 79 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 00:45:29,934 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:45:29,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046833319] [2021-11-21 00:45:29,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046833319] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:45:29,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449896381] [2021-11-21 00:45:29,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:45:29,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:45:29,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:45:29,936 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:45:29,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:45:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:30,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 1126 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:45:30,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:45:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-21 00:45:30,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:45:30,717 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-21 00:45:30,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449896381] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:45:30,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1599043217] [2021-11-21 00:45:30,742 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2021-11-21 00:45:30,743 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:45:30,748 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:45:30,753 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:45:30,753 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:46:05,919 INFO L197 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 66 for LOIs [2021-11-21 00:46:13,707 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:46:16,426 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:46:16,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:46:16,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 16 [2021-11-21 00:46:16,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867795437] [2021-11-21 00:46:16,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:46:16,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 00:46:16,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:46:16,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 00:46:16,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-11-21 00:46:16,429 INFO L87 Difference]: Start difference. First operand 35 states and 50 transitions. Second operand has 16 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-21 00:46:17,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:46:17,093 INFO L93 Difference]: Finished difference Result 131 states and 204 transitions. [2021-11-21 00:46:17,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-21 00:46:17,094 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) Word has length 78 [2021-11-21 00:46:17,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:46:17,097 INFO L225 Difference]: With dead ends: 131 [2021-11-21 00:46:17,097 INFO L226 Difference]: Without dead ends: 98 [2021-11-21 00:46:17,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=226, Invalid=1496, Unknown=0, NotChecked=0, Total=1722 [2021-11-21 00:46:17,101 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 219 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:46:17,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 337 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:46:17,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-21 00:46:17,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2021-11-21 00:46:17,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 75 states have (on average 1.44) internal successors, (108), 77 states have internal predecessors, (108), 12 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (22), 11 states have call predecessors, (22), 12 states have call successors, (22) [2021-11-21 00:46:17,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 142 transitions. [2021-11-21 00:46:17,125 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 142 transitions. Word has length 78 [2021-11-21 00:46:17,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:46:17,126 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 142 transitions. [2021-11-21 00:46:17,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-21 00:46:17,126 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 142 transitions. [2021-11-21 00:46:17,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-21 00:46:17,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:46:17,132 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:46:17,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:46:17,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:46:17,348 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:46:17,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:46:17,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1830493759, now seen corresponding path program 1 times [2021-11-21 00:46:17,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:46:17,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412998822] [2021-11-21 00:46:17,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:17,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:46:17,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:46:18,082 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 27 proven. 475 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2021-11-21 00:46:18,082 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:46:18,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412998822] [2021-11-21 00:46:18,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412998822] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:46:18,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127721687] [2021-11-21 00:46:18,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:18,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:46:18,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:46:18,087 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:46:18,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:46:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:46:18,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 2649 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-21 00:46:18,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:46:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2021-11-21 00:46:20,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:46:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 1 proven. 299 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2021-11-21 00:46:23,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127721687] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:46:23,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1977312632] [2021-11-21 00:46:23,897 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2021-11-21 00:46:23,897 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:46:23,898 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:46:23,898 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:46:23,898 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:48:04,851 INFO L197 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 66 for LOIs [2021-11-21 00:48:23,774 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:48:28,495 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:48:28,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:48:28,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2021-11-21 00:48:28,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345473038] [2021-11-21 00:48:28,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:48:28,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-21 00:48:28,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:48:28,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-21 00:48:28,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=3389, Unknown=0, NotChecked=0, Total=3660 [2021-11-21 00:48:28,500 INFO L87 Difference]: Start difference. First operand 91 states and 142 transitions. Second operand has 41 states, 35 states have (on average 5.171428571428572) internal successors, (181), 35 states have internal predecessors, (181), 10 states have call successors, (14), 8 states have call predecessors, (14), 10 states have return successors, (14), 6 states have call predecessors, (14), 10 states have call successors, (14) [2021-11-21 00:49:17,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:17,980 INFO L93 Difference]: Finished difference Result 3039 states and 5706 transitions. [2021-11-21 00:49:17,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 441 states. [2021-11-21 00:49:17,981 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 35 states have (on average 5.171428571428572) internal successors, (181), 35 states have internal predecessors, (181), 10 states have call successors, (14), 8 states have call predecessors, (14), 10 states have return successors, (14), 6 states have call predecessors, (14), 10 states have call successors, (14) Word has length 195 [2021-11-21 00:49:17,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:18,074 INFO L225 Difference]: With dead ends: 3039 [2021-11-21 00:49:18,074 INFO L226 Difference]: Without dead ends: 2856 [2021-11-21 00:49:18,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1307 GetRequests, 811 SyntacticMatches, 0 SemanticMatches, 496 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109476 ImplicationChecksByTransitivity, 49.2s TimeCoverageRelationStatistics Valid=28929, Invalid=218577, Unknown=0, NotChecked=0, Total=247506 [2021-11-21 00:49:18,157 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 4741 mSDsluCounter, 3210 mSDsCounter, 0 mSdLazyCounter, 3326 mSolverCounterSat, 1108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4741 SdHoareTripleChecker+Valid, 3088 SdHoareTripleChecker+Invalid, 4434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1108 IncrementalHoareTripleChecker+Valid, 3326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:18,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4741 Valid, 3088 Invalid, 4434 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1108 Valid, 3326 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-21 00:49:18,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2021-11-21 00:49:18,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 1528. [2021-11-21 00:49:18,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1447 states have (on average 1.6157567380787836) internal successors, (2338), 1472 states have internal predecessors, (2338), 44 states have call successors, (44), 10 states have call predecessors, (44), 36 states have return successors, (327), 45 states have call predecessors, (327), 44 states have call successors, (327) [2021-11-21 00:49:18,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 2709 transitions. [2021-11-21 00:49:18,576 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 2709 transitions. Word has length 195 [2021-11-21 00:49:18,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:18,577 INFO L470 AbstractCegarLoop]: Abstraction has 1528 states and 2709 transitions. [2021-11-21 00:49:18,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 35 states have (on average 5.171428571428572) internal successors, (181), 35 states have internal predecessors, (181), 10 states have call successors, (14), 8 states have call predecessors, (14), 10 states have return successors, (14), 6 states have call predecessors, (14), 10 states have call successors, (14) [2021-11-21 00:49:18,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 2709 transitions. [2021-11-21 00:49:18,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-21 00:49:18,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:18,618 INFO L514 BasicCegarLoop]: trace histogram [15, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:18,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:49:18,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:49:18,840 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:49:18,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:18,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1741877527, now seen corresponding path program 2 times [2021-11-21 00:49:18,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:49:18,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040307895] [2021-11-21 00:49:18,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:18,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:49:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:20,931 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 400 proven. 366 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-21 00:49:20,931 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:49:20,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040307895] [2021-11-21 00:49:20,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040307895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:49:20,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13434616] [2021-11-21 00:49:20,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:49:20,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:49:20,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:49:20,938 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:49:20,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d37ef8-20fb-47de-921d-1f1b04d8ff93/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:49:21,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-21 00:49:21,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:49:21,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 1909 conjuncts, 116 conjunts are in the unsatisfiable core [2021-11-21 00:49:21,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:49:29,133 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 464 proven. 263 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-11-21 00:49:29,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:49:59,325 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 414 proven. 353 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-21 00:49:59,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13434616] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:49:59,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2127166421] [2021-11-21 00:49:59,329 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2021-11-21 00:49:59,329 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:49:59,329 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:49:59,330 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:49:59,330 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:52:29,512 INFO L197 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 66 for LOIs [2021-11-21 00:52:53,652 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:52:59,145 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:52:59,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:52:59,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 30, 31] total 80 [2021-11-21 00:52:59,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113969379] [2021-11-21 00:52:59,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:52:59,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-21 00:52:59,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:52:59,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-21 00:52:59,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=832, Invalid=9068, Unknown=0, NotChecked=0, Total=9900 [2021-11-21 00:52:59,150 INFO L87 Difference]: Start difference. First operand 1528 states and 2709 transitions. Second operand has 80 states, 78 states have (on average 4.67948717948718) internal successors, (365), 74 states have internal predecessors, (365), 12 states have call successors, (21), 10 states have call predecessors, (21), 19 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24)