./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/lu.cmp.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/lu.cmp.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs --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 640282f6b7135e6e195eda6d48d5761dd6ed3cc4 ................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/lu.cmp.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs --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 640282f6b7135e6e195eda6d48d5761dd6ed3cc4 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:43:56,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:43:56,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:43:56,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:43:56,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:43:56,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:43:56,258 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:43:56,261 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:43:56,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:43:56,265 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:43:56,266 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:43:56,268 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:43:56,269 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:43:56,270 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:43:56,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:43:56,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:43:56,275 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:43:56,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:43:56,280 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:43:56,283 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:43:56,286 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:43:56,288 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:43:56,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:43:56,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:43:56,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:43:56,296 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:43:56,297 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:43:56,299 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:43:56,299 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:43:56,301 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:43:56,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:43:56,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:43:56,304 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:43:56,305 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:43:56,307 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:43:56,308 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:43:56,309 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:43:56,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:43:56,310 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:43:56,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:43:56,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:43:56,314 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:43:56,354 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:43:56,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:43:56,357 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:43:56,357 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:43:56,358 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:43:56,358 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:43:56,358 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:43:56,358 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:43:56,359 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:43:56,359 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:43:56,364 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:43:56,364 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:43:56,364 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:43:56,365 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:43:56,365 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:43:56,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:43:56,366 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:43:56,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:43:56,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:43:56,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:43:56,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:43:56,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:43:56,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:43:56,367 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:43:56,368 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:43:56,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:43:56,368 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:43:56,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:43:56,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:43:56,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:43:56,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:43:56,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:43:56,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:43:56,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:43:56,370 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:43:56,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:43:56,370 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:43:56,370 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:43:56,371 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:43:56,371 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_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 640282f6b7135e6e195eda6d48d5761dd6ed3cc4 [2021-10-16 02:43:56,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:43:56,769 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:43:56,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:43:56,773 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:43:56,774 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:43:56,775 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/loops/lu.cmp.c [2021-10-16 02:43:56,842 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/data/5fdbf7055/9023f9107c28419297c4d246fce98398/FLAG0131278fd [2021-10-16 02:43:57,333 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:43:57,334 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/sv-benchmarks/c/loops/lu.cmp.c [2021-10-16 02:43:57,342 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/data/5fdbf7055/9023f9107c28419297c4d246fce98398/FLAG0131278fd [2021-10-16 02:43:57,704 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/data/5fdbf7055/9023f9107c28419297c4d246fce98398 [2021-10-16 02:43:57,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:43:57,709 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:43:57,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:43:57,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:43:57,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:43:57,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:43:57" (1/1) ... [2021-10-16 02:43:57,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bc49882 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:57, skipping insertion in model container [2021-10-16 02:43:57,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:43:57" (1/1) ... [2021-10-16 02:43:57,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:43:57,753 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:43:57,877 WARN L228 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_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/sv-benchmarks/c/loops/lu.cmp.c[318,331] [2021-10-16 02:43:57,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:43:57,953 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:43:57,964 WARN L228 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_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/sv-benchmarks/c/loops/lu.cmp.c[318,331] [2021-10-16 02:43:57,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:43:58,009 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:43:58,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:58 WrapperNode [2021-10-16 02:43:58,010 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:43:58,011 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:43:58,011 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:43:58,012 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:43:58,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:58" (1/1) ... [2021-10-16 02:43:58,032 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:58" (1/1) ... [2021-10-16 02:43:58,069 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:43:58,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:43:58,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:43:58,070 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:43:58,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:58" (1/1) ... [2021-10-16 02:43:58,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:58" (1/1) ... [2021-10-16 02:43:58,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:58" (1/1) ... [2021-10-16 02:43:58,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:58" (1/1) ... [2021-10-16 02:43:58,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:58" (1/1) ... [2021-10-16 02:43:58,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:58" (1/1) ... [2021-10-16 02:43:58,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:58" (1/1) ... [2021-10-16 02:43:58,143 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:43:58,144 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:43:58,144 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:43:58,144 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:43:58,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:58" (1/1) ... [2021-10-16 02:43:58,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:43:58,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:43:58,183 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:43:58,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:43:58,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:43:58,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:43:58,239 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-10-16 02:43:58,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-10-16 02:43:58,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:43:58,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:43:58,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:43:58,995 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:43:58,995 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-16 02:43:58,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:43:58 BoogieIcfgContainer [2021-10-16 02:43:58,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:43:59,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:43:59,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:43:59,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:43:59,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:43:57" (1/3) ... [2021-10-16 02:43:59,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aa71c08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:43:59, skipping insertion in model container [2021-10-16 02:43:59,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:58" (2/3) ... [2021-10-16 02:43:59,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aa71c08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:43:59, skipping insertion in model container [2021-10-16 02:43:59,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:43:58" (3/3) ... [2021-10-16 02:43:59,011 INFO L111 eAbstractionObserver]: Analyzing ICFG lu.cmp.c [2021-10-16 02:43:59,017 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:43:59,018 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:43:59,078 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:43:59,085 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, mConcurrency=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 [2021-10-16 02:43:59,085 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:43:59,101 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.8) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:43:59,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 02:43:59,108 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:43:59,108 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 02:43:59,109 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:43:59,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:43:59,115 INFO L82 PathProgramCache]: Analyzing trace with hash 219396429, now seen corresponding path program 1 times [2021-10-16 02:43:59,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:43:59,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009232278] [2021-10-16 02:43:59,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:43:59,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:43:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:43:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:43:59,432 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:43:59,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009232278] [2021-10-16 02:43:59,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009232278] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:43:59,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:43:59,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:43:59,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869390518] [2021-10-16 02:43:59,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:43:59,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:43:59,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:43:59,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:43:59,458 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.8) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 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 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:43:59,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:43:59,498 INFO L93 Difference]: Finished difference Result 44 states and 73 transitions. [2021-10-16 02:43:59,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:43:59,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-10-16 02:43:59,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:43:59,508 INFO L225 Difference]: With dead ends: 44 [2021-10-16 02:43:59,508 INFO L226 Difference]: Without dead ends: 8 [2021-10-16 02:43:59,511 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:43:59,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-16 02:43:59,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-16 02:43:59,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 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) [2021-10-16 02:43:59,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-10-16 02:43:59,545 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2021-10-16 02:43:59,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:43:59,546 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-10-16 02:43:59,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:43:59,547 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-10-16 02:43:59,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:43:59,547 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:43:59,547 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:43:59,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:43:59,548 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:43:59,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:43:59,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1788574205, now seen corresponding path program 1 times [2021-10-16 02:43:59,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:43:59,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010010264] [2021-10-16 02:43:59,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:43:59,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:43:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:43:59,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:43:59,671 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:43:59,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010010264] [2021-10-16 02:43:59,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010010264] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:43:59,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:43:59,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:43:59,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118779944] [2021-10-16 02:43:59,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:43:59,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:43:59,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:43:59,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:43:59,676 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:43:59,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:43:59,726 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-10-16 02:43:59,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:43:59,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-10-16 02:43:59,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:43:59,727 INFO L225 Difference]: With dead ends: 15 [2021-10-16 02:43:59,727 INFO L226 Difference]: Without dead ends: 13 [2021-10-16 02:43:59,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:43:59,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-16 02:43:59,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-10-16 02:43:59,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 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) [2021-10-16 02:43:59,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-10-16 02:43:59,733 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2021-10-16 02:43:59,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:43:59,733 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-10-16 02:43:59,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:43:59,734 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-10-16 02:43:59,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:43:59,735 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:43:59,735 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2021-10-16 02:43:59,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:43:59,736 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:43:59,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:43:59,737 INFO L82 PathProgramCache]: Analyzing trace with hash 253668577, now seen corresponding path program 1 times [2021-10-16 02:43:59,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:43:59,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210538130] [2021-10-16 02:43:59,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:43:59,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:43:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:43:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:43:59,829 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:43:59,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210538130] [2021-10-16 02:43:59,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210538130] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:43:59,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231142364] [2021-10-16 02:43:59,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:43:59,837 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:43:59,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:43:59,847 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:43:59,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:43:59,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:43:59,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:43:59,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:44:00,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:44:00,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:44:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:44:00,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231142364] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:44:00,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [11425776] [2021-10-16 02:44:00,194 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-16 02:44:00,194 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:44:00,198 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:44:00,214 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:44:00,215 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:44:00,269 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:44:00,277 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:44:00,278 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:44:00,279 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-10-16 02:44:00,286 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:44:00,289 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:44:00,291 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-10-16 02:44:00,293 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:44:00,294 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:44:00,295 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-16 02:44:00,306 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 255 [2021-10-16 02:44:00,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:44:00,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:44:00,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:44:00,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:44:00,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:44:00,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:44:00,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:44:00,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:44:00,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:44:00,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:44:00,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:44:00,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:44:00,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:44:00,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:44:00,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:44:00,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 31 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 31 [2021-10-16 02:44:00,434 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:44:00,435 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-10-16 02:44:00,438 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:44:00,439 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-10-16 02:44:00,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:44:00,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:44:00,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:44:00,565 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:44:00,579 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 260 [2021-10-16 02:44:00,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:44:00,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:251, output treesize:260 [2021-10-16 02:44:00,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:44:00,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:44:00,797 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_29| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-16 02:44:00,801 INFO L168 Benchmark]: Toolchain (without parser) took 3091.63 ms. Allocated memory was 83.9 MB in the beginning and 115.3 MB in the end (delta: 31.5 MB). Free memory was 46.1 MB in the beginning and 88.5 MB in the end (delta: -42.4 MB). Peak memory consumption was 44.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:44:00,801 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 83.9 MB. Free memory is still 62.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:44:00,802 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.44 ms. Allocated memory was 83.9 MB in the beginning and 115.3 MB in the end (delta: 31.5 MB). Free memory was 46.0 MB in the beginning and 91.8 MB in the end (delta: -45.8 MB). Peak memory consumption was 13.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:44:00,803 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.09 ms. Allocated memory is still 115.3 MB. Free memory was 91.8 MB in the beginning and 89.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:44:00,804 INFO L168 Benchmark]: Boogie Preprocessor took 72.84 ms. Allocated memory is still 115.3 MB. Free memory was 89.7 MB in the beginning and 87.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:44:00,805 INFO L168 Benchmark]: RCFGBuilder took 855.30 ms. Allocated memory is still 115.3 MB. Free memory was 87.6 MB in the beginning and 62.4 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:44:00,805 INFO L168 Benchmark]: TraceAbstraction took 1798.41 ms. Allocated memory is still 115.3 MB. Free memory was 62.4 MB in the beginning and 88.5 MB in the end (delta: -26.2 MB). Peak memory consumption was 27.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:44:00,811 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 83.9 MB. Free memory is still 62.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 299.44 ms. Allocated memory was 83.9 MB in the beginning and 115.3 MB in the end (delta: 31.5 MB). Free memory was 46.0 MB in the beginning and 91.8 MB in the end (delta: -45.8 MB). Peak memory consumption was 13.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.09 ms. Allocated memory is still 115.3 MB. Free memory was 91.8 MB in the beginning and 89.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 72.84 ms. Allocated memory is still 115.3 MB. Free memory was 89.7 MB in the beginning and 87.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 855.30 ms. Allocated memory is still 115.3 MB. Free memory was 87.6 MB in the beginning and 62.4 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1798.41 ms. Allocated memory is still 115.3 MB. Free memory was 62.4 MB in the beginning and 88.5 MB in the end (delta: -26.2 MB). Peak memory consumption was 27.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_29| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_29|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 02:44:00,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:44:03,721 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:44:03,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:44:03,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:44:03,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:44:03,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:44:03,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:44:03,802 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:44:03,806 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:44:03,816 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:44:03,818 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:44:03,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:44:03,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:44:03,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:44:03,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:44:03,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:44:03,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:44:03,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:44:03,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:44:03,854 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:44:03,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:44:03,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:44:03,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:44:03,864 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:44:03,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:44:03,874 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:44:03,875 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:44:03,877 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:44:03,877 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:44:03,879 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:44:03,879 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:44:03,880 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:44:03,882 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:44:03,883 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:44:03,885 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:44:03,885 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:44:03,886 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:44:03,886 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:44:03,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:44:03,888 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:44:03,889 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:44:03,894 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:44:03,944 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:44:03,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:44:03,946 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:44:03,947 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:44:03,947 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:44:03,947 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:44:03,948 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:44:03,948 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:44:03,948 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:44:03,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:44:03,951 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:44:03,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:44:03,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:44:03,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:44:03,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:44:03,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:44:03,953 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:44:03,953 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:44:03,953 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:44:03,954 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:44:03,954 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:44:03,954 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:44:03,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:44:03,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:44:03,955 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:44:03,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:44:03,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:44:03,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:44:03,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:44:03,956 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:44:03,957 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:44:03,957 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:44:03,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:44:03,958 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:44:03,958 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:44:03,959 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 640282f6b7135e6e195eda6d48d5761dd6ed3cc4 [2021-10-16 02:44:04,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:44:04,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:44:04,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:44:04,446 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:44:04,447 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:44:04,451 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/loops/lu.cmp.c [2021-10-16 02:44:04,538 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/data/335dd97aa/ae8844559a4a4a8c9ce54f0a4b8c7f6a/FLAG07afb2aa9 [2021-10-16 02:44:05,179 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:44:05,183 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/sv-benchmarks/c/loops/lu.cmp.c [2021-10-16 02:44:05,196 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/data/335dd97aa/ae8844559a4a4a8c9ce54f0a4b8c7f6a/FLAG07afb2aa9 [2021-10-16 02:44:05,534 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/data/335dd97aa/ae8844559a4a4a8c9ce54f0a4b8c7f6a [2021-10-16 02:44:05,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:44:05,547 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:44:05,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:44:05,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:44:05,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:44:05,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:44:05" (1/1) ... [2021-10-16 02:44:05,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1893320 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:44:05, skipping insertion in model container [2021-10-16 02:44:05,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:44:05" (1/1) ... [2021-10-16 02:44:05,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:44:05,596 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:44:05,764 WARN L228 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_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/sv-benchmarks/c/loops/lu.cmp.c[318,331] [2021-10-16 02:44:05,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:44:05,827 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:44:05,841 WARN L228 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_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/sv-benchmarks/c/loops/lu.cmp.c[318,331] [2021-10-16 02:44:05,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:44:05,914 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:44:05,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:44:05 WrapperNode [2021-10-16 02:44:05,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:44:05,916 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:44:05,916 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:44:05,917 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:44:05,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:44:05" (1/1) ... [2021-10-16 02:44:05,978 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:44:05" (1/1) ... [2021-10-16 02:44:06,028 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:44:06,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:44:06,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:44:06,033 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:44:06,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:44:05" (1/1) ... [2021-10-16 02:44:06,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:44:05" (1/1) ... [2021-10-16 02:44:06,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:44:05" (1/1) ... [2021-10-16 02:44:06,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:44:05" (1/1) ... [2021-10-16 02:44:06,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:44:05" (1/1) ... [2021-10-16 02:44:06,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:44:05" (1/1) ... [2021-10-16 02:44:06,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:44:05" (1/1) ... [2021-10-16 02:44:06,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:44:06,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:44:06,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:44:06,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:44:06,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:44:05" (1/1) ... [2021-10-16 02:44:06,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:44:06,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:44:06,159 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:44:06,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:44:06,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2021-10-16 02:44:06,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2021-10-16 02:44:06,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:44:06,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:44:06,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:44:06,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:44:06,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:44:22,893 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:44:22,893 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-16 02:44:22,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:44:22 BoogieIcfgContainer [2021-10-16 02:44:22,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:44:22,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:44:22,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:44:22,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:44:22,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:44:05" (1/3) ... [2021-10-16 02:44:22,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c06364 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:44:22, skipping insertion in model container [2021-10-16 02:44:22,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:44:05" (2/3) ... [2021-10-16 02:44:22,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c06364 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:44:22, skipping insertion in model container [2021-10-16 02:44:22,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:44:22" (3/3) ... [2021-10-16 02:44:22,905 INFO L111 eAbstractionObserver]: Analyzing ICFG lu.cmp.c [2021-10-16 02:44:22,911 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:44:22,912 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:44:22,965 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:44:22,983 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, mConcurrency=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 [2021-10-16 02:44:22,985 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:44:23,016 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 49 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:44:23,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 02:44:23,027 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:44:23,028 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:44:23,028 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:44:23,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:44:23,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1809811384, now seen corresponding path program 1 times [2021-10-16 02:44:23,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:44:23,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483475953] [2021-10-16 02:44:23,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:44:23,053 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:44:23,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:44:23,057 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:44:23,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:44:23,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:44:23,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:44:23,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:44:23,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:44:23,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:44:23,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:44:23,592 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:44:23,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [483475953] [2021-10-16 02:44:23,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [483475953] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:44:23,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:44:23,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:44:23,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873735831] [2021-10-16 02:44:23,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:44:23,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:44:23,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:44:23,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:44:23,622 INFO L87 Difference]: Start difference. First operand has 50 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 49 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:44:24,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:44:24,997 INFO L93 Difference]: Finished difference Result 103 states and 162 transitions. [2021-10-16 02:44:25,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:44:25,009 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 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 7 [2021-10-16 02:44:25,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:44:25,016 INFO L225 Difference]: With dead ends: 103 [2021-10-16 02:44:25,016 INFO L226 Difference]: Without dead ends: 18 [2021-10-16 02:44:25,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 227.6ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:44:25,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-16 02:44:25,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-16 02:44:25,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:44:25,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-10-16 02:44:25,056 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 7 [2021-10-16 02:44:25,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:44:25,057 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-10-16 02:44:25,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:44:25,057 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-10-16 02:44:25,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 02:44:25,058 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:44:25,059 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:44:25,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-16 02:44:25,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:44:25,274 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:44:25,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:44:25,275 INFO L82 PathProgramCache]: Analyzing trace with hash 116728450, now seen corresponding path program 1 times [2021-10-16 02:44:25,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:44:25,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410626396] [2021-10-16 02:44:25,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:44:25,277 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:44:25,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:44:25,279 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:44:25,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:44:25,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:44:25,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:44:25,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:44:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:44:26,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:44:26,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:44:26,607 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:44:26,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410626396] [2021-10-16 02:44:26,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1410626396] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:44:26,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [307629593] [2021-10-16 02:44:26,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:44:26,609 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:44:26,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:44:26,616 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:44:26,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-10-16 02:44:26,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:44:26,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:44:26,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:44:27,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:44:27,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:44:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:44:27,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [307629593] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:44:27,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135682140] [2021-10-16 02:44:27,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:44:27,346 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:44:27,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:44:27,351 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:44:27,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-16 02:44:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:44:27,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:44:27,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:44:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:44:27,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:44:28,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:44:28,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135682140] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:44:28,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:44:28,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-10-16 02:44:28,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771525410] [2021-10-16 02:44:28,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:44:28,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:44:28,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:44:28,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:44:28,007 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:44:31,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:44:31,275 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2021-10-16 02:44:31,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:44:31,276 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 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 [2021-10-16 02:44:31,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:44:31,279 INFO L225 Difference]: With dead ends: 94 [2021-10-16 02:44:31,279 INFO L226 Difference]: Without dead ends: 78 [2021-10-16 02:44:31,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 435.9ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:44:31,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-16 02:44:31,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2021-10-16 02:44:31,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:44:31,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-10-16 02:44:31,296 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 15 [2021-10-16 02:44:31,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:44:31,296 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-10-16 02:44:31,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:44:31,297 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-10-16 02:44:31,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 02:44:31,298 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:44:31,298 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:44:31,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:44:31,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:44:31,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:44:31,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:44:31,907 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:44:31,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:44:31,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1891735812, now seen corresponding path program 1 times [2021-10-16 02:44:31,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:44:31,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924770076] [2021-10-16 02:44:31,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:44:31,909 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:44:31,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:44:31,911 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:44:31,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:44:32,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:44:32,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:44:32,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:44:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:44:32,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:44:33,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:44:33,266 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:44:33,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924770076] [2021-10-16 02:44:33,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924770076] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:44:33,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1728896431] [2021-10-16 02:44:33,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:44:33,267 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:44:33,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:44:33,268 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:44:33,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-16 02:44:34,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:44:34,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:44:34,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:44:34,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:44:34,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:44:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:44:34,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1728896431] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:44:34,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451907131] [2021-10-16 02:44:34,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:44:34,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:44:34,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:44:34,549 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:44:34,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-16 02:44:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:44:34,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:44:34,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:44:35,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-16 02:44:35,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:44:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-16 02:44:35,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451907131] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:44:35,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-16 02:44:35,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 6, 6] total 14 [2021-10-16 02:44:35,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338793791] [2021-10-16 02:44:35,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:44:35,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:44:35,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:44:35,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:44:35,524 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:44:38,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:44:38,275 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2021-10-16 02:44:38,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:44:38,284 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 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 [2021-10-16 02:44:38,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:44:38,286 INFO L225 Difference]: With dead ends: 92 [2021-10-16 02:44:38,287 INFO L226 Difference]: Without dead ends: 90 [2021-10-16 02:44:38,287 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 828.1ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:44:38,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-16 02:44:38,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2021-10-16 02:44:38,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 69 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:44:38,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2021-10-16 02:44:38,305 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 15 [2021-10-16 02:44:38,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:44:38,305 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2021-10-16 02:44:38,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:44:38,306 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2021-10-16 02:44:38,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-16 02:44:38,308 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:44:38,308 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2021-10-16 02:44:38,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:44:38,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:44:38,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:44:38,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:44:38,928 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:44:38,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:44:38,928 INFO L82 PathProgramCache]: Analyzing trace with hash -865137092, now seen corresponding path program 1 times [2021-10-16 02:44:38,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:44:38,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [392152454] [2021-10-16 02:44:38,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:44:38,929 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:44:38,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:44:38,931 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:44:38,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:44:40,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:44:40,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:44:40,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:44:40,822 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-10-16 02:44:40,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:44:41,461 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-10-16 02:44:41,461 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:44:41,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [392152454] [2021-10-16 02:44:41,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [392152454] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:44:41,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1470819465] [2021-10-16 02:44:41,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:44:41,463 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:44:41,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:44:41,466 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:44:41,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-16 02:44:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:44:41,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:44:41,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:44:42,544 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-10-16 02:44:42,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:44:43,329 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-10-16 02:44:43,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1470819465] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:44:43,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940384442] [2021-10-16 02:44:43,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:44:43,330 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:44:43,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:44:43,334 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:44:43,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-16 02:44:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:44:43,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:44:43,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:44:44,253 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-10-16 02:44:44,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:44:44,749 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-10-16 02:44:44,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940384442] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:44:44,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:44:44,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5, 5, 5, 5] total 16 [2021-10-16 02:44:44,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895810754] [2021-10-16 02:44:44,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-16 02:44:44,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:44:44,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-16 02:44:44,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:44:44,752 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:44:57,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:44:57,603 INFO L93 Difference]: Finished difference Result 266 states and 342 transitions. [2021-10-16 02:44:57,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-16 02:44:57,604 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-10-16 02:44:57,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:44:57,606 INFO L225 Difference]: With dead ends: 266 [2021-10-16 02:44:57,607 INFO L226 Difference]: Without dead ends: 220 [2021-10-16 02:44:57,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 5656.1ms TimeCoverageRelationStatistics Valid=762, Invalid=2778, Unknown=0, NotChecked=0, Total=3540 [2021-10-16 02:44:57,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-10-16 02:44:57,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 208. [2021-10-16 02:44:57,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.1497584541062802) internal successors, (238), 207 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:44:57,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 238 transitions. [2021-10-16 02:44:57,670 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 238 transitions. Word has length 43 [2021-10-16 02:44:57,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:44:57,670 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 238 transitions. [2021-10-16 02:44:57,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:44:57,671 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 238 transitions. [2021-10-16 02:44:57,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-10-16 02:44:57,681 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:44:57,681 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 18, 15, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2021-10-16 02:44:57,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:44:57,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-10-16 02:44:58,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-10-16 02:44:58,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:44:58,303 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:44:58,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:44:58,303 INFO L82 PathProgramCache]: Analyzing trace with hash 556208144, now seen corresponding path program 2 times [2021-10-16 02:44:58,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:44:58,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1657263087] [2021-10-16 02:44:58,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:44:58,304 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:44:58,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:44:58,306 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:44:58,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-16 02:44:58,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-16 02:44:58,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:44:58,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:44:58,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:44:59,942 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 318 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-10-16 02:44:59,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 318 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-10-16 02:45:01,202 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:45:01,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1657263087] [2021-10-16 02:45:01,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1657263087] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:45:01,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2101541663] [2021-10-16 02:45:01,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:45:01,203 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:45:01,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:45:01,208 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:45:01,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-16 02:45:01,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-16 02:45:01,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:45:01,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:45:01,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:02,883 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 318 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-10-16 02:45:02,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:03,945 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 318 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-10-16 02:45:03,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2101541663] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:45:03,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069695451] [2021-10-16 02:45:03,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:45:03,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:45:03,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:45:03,954 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:45:03,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-16 02:45:04,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-16 02:45:04,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:45:04,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:45:04,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:05,383 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 318 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-10-16 02:45:05,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:06,411 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 318 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-10-16 02:45:06,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069695451] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:45:06,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:45:06,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-10-16 02:45:06,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841090930] [2021-10-16 02:45:06,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:45:06,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:45:06,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:45:06,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:45:06,415 INFO L87 Difference]: Start difference. First operand 208 states and 238 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:08,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:08,826 INFO L93 Difference]: Finished difference Result 208 states and 238 transitions. [2021-10-16 02:45:08,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:45:08,828 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 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 91 [2021-10-16 02:45:08,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:08,829 INFO L225 Difference]: With dead ends: 208 [2021-10-16 02:45:08,829 INFO L226 Difference]: Without dead ends: 0 [2021-10-16 02:45:08,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 403.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:45:08,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-16 02:45:08,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-16 02:45:08,831 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) [2021-10-16 02:45:08,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-16 02:45:08,831 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 91 [2021-10-16 02:45:08,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:08,832 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-16 02:45:08,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:08,832 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-16 02:45:08,832 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-16 02:45:08,835 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:45:08,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-10-16 02:45:09,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-16 02:45:09,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-10-16 02:45:09,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:45:09,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-16 02:45:09,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:45:09,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:45:09,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:45:09,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:45:09,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:45:09,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:45:09,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:45:09,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:45:09,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:45:09,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:45:09,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:45:09,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:45:09,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:45:09,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:45:09,635 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:45:10,568 INFO L857 garLoopResultBuilder]: For program point L93-2(lines 93 104) no Hoare annotation was computed. [2021-10-16 02:45:10,569 INFO L853 garLoopResultBuilder]: At program point L93-3(lines 93 104) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~n~0 (_ bv5 32)))) (or (and .cse0 (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32)) (bvslt ULTIMATE.start_main_~i~0 (_ bv50 32))) (and .cse0 (= ULTIMATE.start_main_~i~0 (_ bv0 32))))) [2021-10-16 02:45:10,569 INFO L857 garLoopResultBuilder]: For program point L93-4(lines 93 104) no Hoare annotation was computed. [2021-10-16 02:45:10,569 INFO L857 garLoopResultBuilder]: For program point L118-2(lines 118 136) no Hoare annotation was computed. [2021-10-16 02:45:10,570 INFO L853 garLoopResultBuilder]: At program point L118-3(lines 118 136) the Hoare annotation is: (= ULTIMATE.start_main_~n~0 (_ bv5 32)) [2021-10-16 02:45:10,570 INFO L857 garLoopResultBuilder]: For program point L118-4(lines 118 136) no Hoare annotation was computed. [2021-10-16 02:45:10,570 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-16 02:45:10,570 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-16 02:45:10,571 INFO L853 garLoopResultBuilder]: At program point L153(lines 111 155) the Hoare annotation is: (= ULTIMATE.start_main_~n~0 (_ bv5 32)) [2021-10-16 02:45:10,571 INFO L857 garLoopResultBuilder]: For program point L120(line 120) no Hoare annotation was computed. [2021-10-16 02:45:10,571 INFO L857 garLoopResultBuilder]: For program point L129-2(lines 129 135) no Hoare annotation was computed. [2021-10-16 02:45:10,571 INFO L857 garLoopResultBuilder]: For program point L96-2(lines 96 101) no Hoare annotation was computed. [2021-10-16 02:45:10,572 INFO L853 garLoopResultBuilder]: At program point L129-3(lines 129 135) the Hoare annotation is: (= ULTIMATE.start_main_~n~0 (_ bv5 32)) [2021-10-16 02:45:10,572 INFO L853 garLoopResultBuilder]: At program point L96-3(lines 96 101) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~n~0 (_ bv5 32)))) (or (and .cse0 (bvsle ULTIMATE.start_main_~i~0 (_ bv5 32)) (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32))) (and .cse0 (= ULTIMATE.start_main_~i~0 (_ bv0 32))))) [2021-10-16 02:45:10,572 INFO L857 garLoopResultBuilder]: For program point L96-4(lines 96 101) no Hoare annotation was computed. [2021-10-16 02:45:10,572 INFO L857 garLoopResultBuilder]: For program point L121-2(lines 121 128) no Hoare annotation was computed. [2021-10-16 02:45:10,573 INFO L853 garLoopResultBuilder]: At program point L121-3(lines 121 128) the Hoare annotation is: (= ULTIMATE.start_main_~n~0 (_ bv5 32)) [2021-10-16 02:45:10,573 INFO L857 garLoopResultBuilder]: For program point L121-4(lines 121 128) no Hoare annotation was computed. [2021-10-16 02:45:10,573 INFO L857 garLoopResultBuilder]: For program point L80(lines 80 81) no Hoare annotation was computed. [2021-10-16 02:45:10,573 INFO L857 garLoopResultBuilder]: For program point L146-2(lines 146 152) no Hoare annotation was computed. [2021-10-16 02:45:10,573 INFO L853 garLoopResultBuilder]: At program point L146-3(lines 146 152) the Hoare annotation is: (= ULTIMATE.start_main_~n~0 (_ bv5 32)) [2021-10-16 02:45:10,574 INFO L857 garLoopResultBuilder]: For program point L80-2(lines 80 81) no Hoare annotation was computed. [2021-10-16 02:45:10,574 INFO L857 garLoopResultBuilder]: For program point L146-4(lines 146 152) no Hoare annotation was computed. [2021-10-16 02:45:10,574 INFO L857 garLoopResultBuilder]: For program point L138-2(lines 138 144) no Hoare annotation was computed. [2021-10-16 02:45:10,574 INFO L853 garLoopResultBuilder]: At program point L138-3(lines 138 144) the Hoare annotation is: (= ULTIMATE.start_main_~n~0 (_ bv5 32)) [2021-10-16 02:45:10,575 INFO L857 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-10-16 02:45:10,575 INFO L857 garLoopResultBuilder]: For program point L138-4(lines 138 144) no Hoare annotation was computed. [2021-10-16 02:45:10,575 INFO L853 garLoopResultBuilder]: At program point L6-2(lines 5 10) the Hoare annotation is: (let ((.cse1 (= ULTIMATE.start_main_~i~0 (_ bv0 32))) (.cse0 (= ULTIMATE.start_main_~n~0 (_ bv5 32))) (.cse2 (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32)))) (or (and .cse0 .cse1 .cse2 (not (= ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~j~0))) (and (not .cse1) .cse0 (bvsle ULTIMATE.start_main_~i~0 (_ bv5 32)) .cse2))) [2021-10-16 02:45:10,575 INFO L857 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-10-16 02:45:10,576 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-16 02:45:10,576 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-10-16 02:45:10,576 INFO L853 garLoopResultBuilder]: At program point L82(lines 76 83) the Hoare annotation is: (= ULTIMATE.start_main_~n~0 (_ bv5 32)) [2021-10-16 02:45:10,576 INFO L857 garLoopResultBuilder]: For program point L99(line 99) no Hoare annotation was computed. [2021-10-16 02:45:10,577 INFO L857 garLoopResultBuilder]: For program point L132-2(lines 132 133) no Hoare annotation was computed. [2021-10-16 02:45:10,577 INFO L857 garLoopResultBuilder]: For program point L99-2(line 99) no Hoare annotation was computed. [2021-10-16 02:45:10,577 INFO L853 garLoopResultBuilder]: At program point L132-3(lines 132 133) the Hoare annotation is: (= ULTIMATE.start_main_~n~0 (_ bv5 32)) [2021-10-16 02:45:10,577 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-16 02:45:10,577 INFO L857 garLoopResultBuilder]: For program point L132-4(lines 132 133) no Hoare annotation was computed. [2021-10-16 02:45:10,578 INFO L857 garLoopResultBuilder]: For program point L124(lines 124 126) no Hoare annotation was computed. [2021-10-16 02:45:10,578 INFO L857 garLoopResultBuilder]: For program point L124-1(lines 124 126) no Hoare annotation was computed. [2021-10-16 02:45:10,578 INFO L857 garLoopResultBuilder]: For program point L149-2(lines 149 150) no Hoare annotation was computed. [2021-10-16 02:45:10,578 INFO L853 garLoopResultBuilder]: At program point L149-3(lines 149 150) the Hoare annotation is: (= ULTIMATE.start_main_~n~0 (_ bv5 32)) [2021-10-16 02:45:10,579 INFO L857 garLoopResultBuilder]: For program point L149-4(lines 149 150) no Hoare annotation was computed. [2021-10-16 02:45:10,579 INFO L853 garLoopResultBuilder]: At program point L108(lines 85 109) the Hoare annotation is: (= ULTIMATE.start_main_~n~0 (_ bv5 32)) [2021-10-16 02:45:10,589 INFO L857 garLoopResultBuilder]: For program point L141-2(lines 141 142) no Hoare annotation was computed. [2021-10-16 02:45:10,590 INFO L853 garLoopResultBuilder]: At program point L141-3(lines 141 142) the Hoare annotation is: (= ULTIMATE.start_main_~n~0 (_ bv5 32)) [2021-10-16 02:45:10,590 INFO L857 garLoopResultBuilder]: For program point L141-4(lines 141 142) no Hoare annotation was computed. [2021-10-16 02:45:10,590 INFO L857 garLoopResultBuilder]: For program point L125-2(lines 125 126) no Hoare annotation was computed. [2021-10-16 02:45:10,590 INFO L853 garLoopResultBuilder]: At program point L125-3(lines 125 126) the Hoare annotation is: (= ULTIMATE.start_main_~n~0 (_ bv5 32)) [2021-10-16 02:45:10,590 INFO L857 garLoopResultBuilder]: For program point L117(line 117) no Hoare annotation was computed. [2021-10-16 02:45:10,596 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:45:10,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:45:10 BoogieIcfgContainer [2021-10-16 02:45:10,649 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:45:10,650 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:45:10,650 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:45:10,651 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:45:10,651 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:44:22" (3/4) ... [2021-10-16 02:45:10,655 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-16 02:45:10,697 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-10-16 02:45:10,697 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-16 02:45:10,698 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:45:10,699 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:45:10,790 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:45:10,791 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:45:10,793 INFO L168 Benchmark]: Toolchain (without parser) took 65245.22 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 26.8 MB in the beginning and 28.0 MB in the end (delta: -1.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:45:10,793 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 50.3 MB. Free memory was 31.4 MB in the beginning and 31.4 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:45:10,794 INFO L168 Benchmark]: CACSL2BoogieTranslator took 366.10 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 26.5 MB in the beginning and 43.9 MB in the end (delta: -17.3 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. [2021-10-16 02:45:10,796 INFO L168 Benchmark]: Boogie Procedure Inliner took 115.12 ms. Allocated memory is still 60.8 MB. Free memory was 43.7 MB in the beginning and 41.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:45:10,796 INFO L168 Benchmark]: Boogie Preprocessor took 90.20 ms. Allocated memory is still 60.8 MB. Free memory was 41.4 MB in the beginning and 39.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:45:10,797 INFO L168 Benchmark]: RCFGBuilder took 16772.97 ms. Allocated memory is still 60.8 MB. Free memory was 39.2 MB in the beginning and 31.6 MB in the end (delta: 7.7 MB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:45:10,797 INFO L168 Benchmark]: TraceAbstraction took 47751.30 ms. Allocated memory is still 60.8 MB. Free memory was 31.1 MB in the beginning and 32.5 MB in the end (delta: -1.4 MB). Peak memory consumption was 17.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:45:10,797 INFO L168 Benchmark]: Witness Printer took 141.14 ms. Allocated memory is still 60.8 MB. Free memory was 32.5 MB in the beginning and 28.0 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:45:10,800 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 50.3 MB. Free memory was 31.4 MB in the beginning and 31.4 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 366.10 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 26.5 MB in the beginning and 43.9 MB in the end (delta: -17.3 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 115.12 ms. Allocated memory is still 60.8 MB. Free memory was 43.7 MB in the beginning and 41.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 90.20 ms. Allocated memory is still 60.8 MB. Free memory was 41.4 MB in the beginning and 39.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 16772.97 ms. Allocated memory is still 60.8 MB. Free memory was 39.2 MB in the beginning and 31.6 MB in the end (delta: 7.7 MB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 47751.30 ms. Allocated memory is still 60.8 MB. Free memory was 31.1 MB in the beginning and 32.5 MB in the end (delta: -1.4 MB). Peak memory consumption was 17.3 MB. Max. memory is 16.1 GB. * Witness Printer took 141.14 ms. Allocated memory is still 60.8 MB. Free memory was 32.5 MB in the beginning and 28.0 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 7]: 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, 50 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 47632.6ms, OverallIterations: 5, TraceHistogramMax: 18, EmptinessCheckTime: 44.6ms, AutomataDifference: 22729.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1125.2ms, InitialAbstractionConstructionTime: 11.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 84 SDtfs, 538 SDslu, 244 SDs, 0 SdLazy, 487 SolverSat, 141 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16136.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1024 GetRequests, 930 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 7551.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=208occurred in iteration=4, InterpolantAutomatonStates: 74, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 113.3ms AutomataMinimizationTime, 5 MinimizatonAttempts, 63 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 15 LocationsWithAnnotation, 15 PreInvPairs, 87 NumberOfFragments, 101 HoareAnnotationTreeSize, 15 FomulaSimplifications, 2485 FormulaSimplificationTreeSizeReduction, 189.5ms HoareSimplificationTime, 15 FomulaSimplificationsInter, 38 FormulaSimplificationTreeSizeReductionInter, 928.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 203.5ms SsaConstructionTime, 3540.4ms SatisfiabilityAnalysisTime, 15242.0ms InterpolantComputationTime, 499 NumberOfCodeBlocks, 247 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 972 ConstructedInterpolants, 0 QuantifiedInterpolants, 2811 SizeOfPredicates, 33 NumberOfNonLiveVariables, 887 ConjunctsInSsa, 58 ConjunctsInUnsatCore, 26 InterpolantComputations, 4 PerfectInterpolantSequences, 2724/4704 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: 5]: Loop Invariant Derived loop invariant: (((n == 5bv32 && i == 0bv32) && cond == 1bv32) && !(i == j)) || (((!(i == 0bv32) && n == 5bv32) && ~bvsle32(i, 5bv32)) && cond == 1bv32) - InvariantResult [Line: 93]: Loop Invariant Derived loop invariant: ((n == 5bv32 && cond == 1bv32) && ~bvslt32(i, 50bv32)) || (n == 5bv32 && i == 0bv32) - InvariantResult [Line: 129]: Loop Invariant Derived loop invariant: n == 5bv32 - InvariantResult [Line: 118]: Loop Invariant Derived loop invariant: n == 5bv32 - InvariantResult [Line: 85]: Loop Invariant Derived loop invariant: n == 5bv32 - InvariantResult [Line: 125]: Loop Invariant Derived loop invariant: n == 5bv32 - InvariantResult [Line: 76]: Loop Invariant Derived loop invariant: n == 5bv32 - InvariantResult [Line: 149]: Loop Invariant Derived loop invariant: n == 5bv32 - InvariantResult [Line: 111]: Loop Invariant Derived loop invariant: n == 5bv32 - InvariantResult [Line: 146]: Loop Invariant Derived loop invariant: n == 5bv32 - InvariantResult [Line: 96]: Loop Invariant Derived loop invariant: ((n == 5bv32 && ~bvsle32(i, 5bv32)) && cond == 1bv32) || (n == 5bv32 && i == 0bv32) - InvariantResult [Line: 138]: Loop Invariant Derived loop invariant: n == 5bv32 - InvariantResult [Line: 132]: Loop Invariant Derived loop invariant: n == 5bv32 - InvariantResult [Line: 141]: Loop Invariant Derived loop invariant: n == 5bv32 - InvariantResult [Line: 121]: Loop Invariant Derived loop invariant: n == 5bv32 RESULT: Ultimate proved your program to be correct! [2021-10-16 02:45:10,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bd82f1-9bfd-4e3c-84bd-933aae9dac28/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...