./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/duplets.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/duplets.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI --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 417a96bf424eb15cdf3ae2ce282b015c547ba383 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/duplets.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI --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 417a96bf424eb15cdf3ae2ce282b015c547ba383 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:28:21,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:28:21,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:28:21,131 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:28:21,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:28:21,136 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:28:21,139 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:28:21,147 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:28:21,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:28:21,158 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:28:21,159 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:28:21,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:28:21,161 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:28:21,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:28:21,166 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:28:21,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:28:21,169 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:28:21,172 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:28:21,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:28:21,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:28:21,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:28:21,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:28:21,189 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:28:21,190 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:28:21,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:28:21,199 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:28:21,199 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:28:21,201 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:28:21,202 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:28:21,204 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:28:21,204 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:28:21,205 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:28:21,207 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:28:21,208 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:28:21,209 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:28:21,210 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:28:21,210 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:28:21,211 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:28:21,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:28:21,212 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:28:21,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:28:21,215 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:28:21,256 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:28:21,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:28:21,257 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:28:21,258 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:28:21,258 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:28:21,258 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:28:21,259 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:28:21,259 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:28:21,259 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:28:21,260 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:28:21,266 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:28:21,267 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:28:21,267 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:28:21,268 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:28:21,268 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:28:21,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:28:21,269 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:28:21,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:28:21,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:28:21,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:28:21,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:28:21,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:28:21,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:28:21,271 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:28:21,271 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:28:21,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:28:21,272 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:28:21,272 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:28:21,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:28:21,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:28:21,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:28:21,275 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:28:21,275 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:28:21,276 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:28:21,276 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:28:21,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:28:21,277 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:28:21,277 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:28:21,277 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:28:21,277 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_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 417a96bf424eb15cdf3ae2ce282b015c547ba383 [2021-10-11 02:28:21,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:28:21,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:28:21,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:28:21,578 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:28:21,579 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:28:21,580 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/verifythis/duplets.c [2021-10-11 02:28:21,645 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/data/dbaab9c52/10a6e6f3fb864986aa5899e6745163ba/FLAG4fd55e1b5 [2021-10-11 02:28:22,204 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:28:22,204 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/sv-benchmarks/c/verifythis/duplets.c [2021-10-11 02:28:22,215 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/data/dbaab9c52/10a6e6f3fb864986aa5899e6745163ba/FLAG4fd55e1b5 [2021-10-11 02:28:22,540 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/data/dbaab9c52/10a6e6f3fb864986aa5899e6745163ba [2021-10-11 02:28:22,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:28:22,544 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:28:22,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:28:22,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:28:22,549 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:28:22,550 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:28:22" (1/1) ... [2021-10-11 02:28:22,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b631113 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:22, skipping insertion in model container [2021-10-11 02:28:22,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:28:22" (1/1) ... [2021-10-11 02:28:22,560 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:28:22,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:28:22,706 WARN L226 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_6946b067-8a6f-474f-bc3b-af56b6f4c657/sv-benchmarks/c/verifythis/duplets.c[485,498] [2021-10-11 02:28:22,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:28:22,764 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:28:22,775 WARN L226 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_6946b067-8a6f-474f-bc3b-af56b6f4c657/sv-benchmarks/c/verifythis/duplets.c[485,498] [2021-10-11 02:28:22,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:28:22,812 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:28:22,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:22 WrapperNode [2021-10-11 02:28:22,813 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:28:22,814 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:28:22,815 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:28:22,815 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:28:22,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:22" (1/1) ... [2021-10-11 02:28:22,834 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:22" (1/1) ... [2021-10-11 02:28:22,862 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:28:22,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:28:22,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:28:22,864 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:28:22,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:22" (1/1) ... [2021-10-11 02:28:22,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:22" (1/1) ... [2021-10-11 02:28:22,876 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:22" (1/1) ... [2021-10-11 02:28:22,877 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:22" (1/1) ... [2021-10-11 02:28:22,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:22" (1/1) ... [2021-10-11 02:28:22,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:22" (1/1) ... [2021-10-11 02:28:22,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:22" (1/1) ... [2021-10-11 02:28:22,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:28:22,899 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:28:22,899 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:28:22,900 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:28:22,901 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:22" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:28:22,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:28:22,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:28:22,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:28:22,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:28:22,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:28:22,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:28:22,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:28:22,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:28:23,854 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:28:23,855 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2021-10-11 02:28:23,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:28:23 BoogieIcfgContainer [2021-10-11 02:28:23,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:28:23,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:28:23,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:28:23,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:28:23,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:28:22" (1/3) ... [2021-10-11 02:28:23,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a2a8e5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:28:23, skipping insertion in model container [2021-10-11 02:28:23,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:22" (2/3) ... [2021-10-11 02:28:23,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a2a8e5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:28:23, skipping insertion in model container [2021-10-11 02:28:23,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:28:23" (3/3) ... [2021-10-11 02:28:23,866 INFO L111 eAbstractionObserver]: Analyzing ICFG duplets.c [2021-10-11 02:28:23,880 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:28:23,883 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2021-10-11 02:28:23,900 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-11 02:28:23,927 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:28:23,927 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:28:23,927 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:28:23,927 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:28:23,928 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:28:23,928 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:28:23,928 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:28:23,928 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:28:23,943 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2021-10-11 02:28:23,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:28:23,948 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:23,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:28:23,949 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:23,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:23,955 INFO L82 PathProgramCache]: Analyzing trace with hash 177948689, now seen corresponding path program 1 times [2021-10-11 02:28:23,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:23,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561719223] [2021-10-11 02:28:23,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:24,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:24,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561719223] [2021-10-11 02:28:24,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:24,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:28:24,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174105541] [2021-10-11 02:28:24,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:28:24,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:24,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:28:24,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:28:24,183 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2021-10-11 02:28:24,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:24,220 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2021-10-11 02:28:24,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:28:24,222 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2021-10-11 02:28:24,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:24,230 INFO L225 Difference]: With dead ends: 73 [2021-10-11 02:28:24,230 INFO L226 Difference]: Without dead ends: 47 [2021-10-11 02:28:24,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:28:24,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-11 02:28:24,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 25. [2021-10-11 02:28:24,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-10-11 02:28:24,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-10-11 02:28:24,270 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 5 [2021-10-11 02:28:24,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:24,270 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-10-11 02:28:24,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:28:24,270 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-10-11 02:28:24,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:28:24,271 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:24,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:24,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:28:24,272 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:24,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:24,273 INFO L82 PathProgramCache]: Analyzing trace with hash 597213427, now seen corresponding path program 1 times [2021-10-11 02:28:24,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:24,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122836162] [2021-10-11 02:28:24,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:24,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:24,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:24,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122836162] [2021-10-11 02:28:24,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:24,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:28:24,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544530357] [2021-10-11 02:28:24,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:28:24,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:24,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:28:24,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:28:24,367 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 4 states. [2021-10-11 02:28:24,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:24,435 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2021-10-11 02:28:24,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:28:24,436 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-10-11 02:28:24,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:24,437 INFO L225 Difference]: With dead ends: 45 [2021-10-11 02:28:24,437 INFO L226 Difference]: Without dead ends: 43 [2021-10-11 02:28:24,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:28:24,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-11 02:28:24,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2021-10-11 02:28:24,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-11 02:28:24,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-10-11 02:28:24,444 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 7 [2021-10-11 02:28:24,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:24,445 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-10-11 02:28:24,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:28:24,445 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-10-11 02:28:24,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:28:24,446 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:24,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:24,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:28:24,446 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:24,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:24,447 INFO L82 PathProgramCache]: Analyzing trace with hash 693170238, now seen corresponding path program 1 times [2021-10-11 02:28:24,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:24,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742414118] [2021-10-11 02:28:24,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:24,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:24,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742414118] [2021-10-11 02:28:24,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:24,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:28:24,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405751600] [2021-10-11 02:28:24,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:28:24,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:24,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:28:24,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:28:24,617 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 4 states. [2021-10-11 02:28:24,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:24,684 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2021-10-11 02:28:24,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:28:24,685 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-10-11 02:28:24,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:24,687 INFO L225 Difference]: With dead ends: 73 [2021-10-11 02:28:24,687 INFO L226 Difference]: Without dead ends: 48 [2021-10-11 02:28:24,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:28:24,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-11 02:28:24,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 28. [2021-10-11 02:28:24,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-11 02:28:24,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-10-11 02:28:24,706 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 7 [2021-10-11 02:28:24,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:24,706 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-10-11 02:28:24,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:28:24,707 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-10-11 02:28:24,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:28:24,707 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:24,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:24,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:28:24,708 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:24,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:24,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1603320325, now seen corresponding path program 1 times [2021-10-11 02:28:24,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:24,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521510978] [2021-10-11 02:28:24,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:24,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:24,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521510978] [2021-10-11 02:28:24,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:24,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-11 02:28:24,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307184444] [2021-10-11 02:28:24,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-10-11 02:28:24,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:24,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-11 02:28:24,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-11 02:28:24,952 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2021-10-11 02:28:25,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:25,336 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-10-11 02:28:25,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-11 02:28:25,337 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2021-10-11 02:28:25,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:25,338 INFO L225 Difference]: With dead ends: 62 [2021-10-11 02:28:25,338 INFO L226 Difference]: Without dead ends: 60 [2021-10-11 02:28:25,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:28:25,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-11 02:28:25,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2021-10-11 02:28:25,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-10-11 02:28:25,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-10-11 02:28:25,347 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 9 [2021-10-11 02:28:25,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:25,348 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-10-11 02:28:25,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-10-11 02:28:25,349 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-10-11 02:28:25,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:28:25,349 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:25,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:25,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:28:25,350 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:25,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:25,352 INFO L82 PathProgramCache]: Analyzing trace with hash 795195818, now seen corresponding path program 1 times [2021-10-11 02:28:25,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:25,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296259889] [2021-10-11 02:28:25,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:25,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296259889] [2021-10-11 02:28:25,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465328932] [2021-10-11 02:28:25,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:28:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:25,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 02:28:25,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:25,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:28:25,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:25,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [224625494] [2021-10-11 02:28:25,667 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-11 02:28:25,667 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:28:25,673 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:28:25,696 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:28:25,697 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:28:25,885 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:28:26,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:28:26,502 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: incompatible size at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexBasedCostEstimation.analyzeCosts(ArrayIndexBasedCostEstimation.java:210) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexBasedCostEstimation.computeCostEstimation(ArrayIndexBasedCostEstimation.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexBasedCostEstimation.(ArrayIndexBasedCostEstimation.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:570) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:441) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:239) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:153) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) 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:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2021-10-11 02:28:26,505 INFO L168 Benchmark]: Toolchain (without parser) took 3960.66 ms. Allocated memory was 96.5 MB in the beginning and 146.8 MB in the end (delta: 50.3 MB). Free memory was 72.3 MB in the beginning and 64.5 MB in the end (delta: 7.8 MB). Peak memory consumption was 57.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:26,506 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 96.5 MB. Free memory is still 58.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:28:26,508 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.79 ms. Allocated memory was 96.5 MB in the beginning and 121.6 MB in the end (delta: 25.2 MB). Free memory was 72.1 MB in the beginning and 97.8 MB in the end (delta: -25.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:26,508 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.10 ms. Allocated memory is still 121.6 MB. Free memory was 97.8 MB in the beginning and 95.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:26,509 INFO L168 Benchmark]: Boogie Preprocessor took 35.21 ms. Allocated memory is still 121.6 MB. Free memory was 95.7 MB in the beginning and 94.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:28:26,510 INFO L168 Benchmark]: RCFGBuilder took 958.10 ms. Allocated memory is still 121.6 MB. Free memory was 94.1 MB in the beginning and 79.1 MB in the end (delta: 15.0 MB). Peak memory consumption was 36.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:26,511 INFO L168 Benchmark]: TraceAbstraction took 2645.34 ms. Allocated memory was 121.6 MB in the beginning and 146.8 MB in the end (delta: 25.2 MB). Free memory was 78.7 MB in the beginning and 64.5 MB in the end (delta: 14.2 MB). Peak memory consumption was 42.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:26,514 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 96.5 MB. Free memory is still 58.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 267.79 ms. Allocated memory was 96.5 MB in the beginning and 121.6 MB in the end (delta: 25.2 MB). Free memory was 72.1 MB in the beginning and 97.8 MB in the end (delta: -25.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.10 ms. Allocated memory is still 121.6 MB. Free memory was 97.8 MB in the beginning and 95.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.21 ms. Allocated memory is still 121.6 MB. Free memory was 95.7 MB in the beginning and 94.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 958.10 ms. Allocated memory is still 121.6 MB. Free memory was 94.1 MB in the beginning and 79.1 MB in the end (delta: 15.0 MB). Peak memory consumption was 36.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2645.34 ms. Allocated memory was 121.6 MB in the beginning and 146.8 MB in the end (delta: 25.2 MB). Free memory was 78.7 MB in the beginning and 64.5 MB in the end (delta: 14.2 MB). Peak memory consumption was 42.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: incompatible size de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: incompatible size: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexBasedCostEstimation.analyzeCosts(ArrayIndexBasedCostEstimation.java:210) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:28:29,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:28:29,057 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:28:29,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:28:29,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:28:29,112 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:28:29,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:28:29,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:28:29,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:28:29,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:28:29,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:28:29,133 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:28:29,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:28:29,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:28:29,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:28:29,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:28:29,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:28:29,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:28:29,146 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:28:29,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:28:29,156 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:28:29,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:28:29,160 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:28:29,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:28:29,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:28:29,172 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:28:29,172 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:28:29,174 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:28:29,175 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:28:29,176 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:28:29,176 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:28:29,177 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:28:29,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:28:29,180 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:28:29,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:28:29,184 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:28:29,184 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:28:29,184 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:28:29,184 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:28:29,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:28:29,186 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:28:29,187 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-11 02:28:29,210 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:28:29,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:28:29,212 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:28:29,212 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:28:29,212 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:28:29,212 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:28:29,212 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:28:29,213 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:28:29,213 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:28:29,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:28:29,214 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:28:29,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:28:29,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:28:29,214 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:28:29,214 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:28:29,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:28:29,215 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:28:29,215 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-11 02:28:29,215 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-11 02:28:29,215 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:28:29,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:28:29,216 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:28:29,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:28:29,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:28:29,216 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 02:28:29,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:28:29,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:28:29,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:28:29,217 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:28:29,217 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:28:29,218 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-11 02:28:29,218 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-11 02:28:29,218 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:28:29,218 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:28:29,218 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:28:29,218 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_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 417a96bf424eb15cdf3ae2ce282b015c547ba383 [2021-10-11 02:28:29,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:28:29,629 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:28:29,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:28:29,633 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:28:29,637 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:28:29,640 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/verifythis/duplets.c [2021-10-11 02:28:29,713 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/data/ce5b4a58f/d54250242f3a4ecdb5fb09e5bca10b23/FLAG5b654c412 [2021-10-11 02:28:30,237 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:28:30,238 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/sv-benchmarks/c/verifythis/duplets.c [2021-10-11 02:28:30,246 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/data/ce5b4a58f/d54250242f3a4ecdb5fb09e5bca10b23/FLAG5b654c412 [2021-10-11 02:28:30,581 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/data/ce5b4a58f/d54250242f3a4ecdb5fb09e5bca10b23 [2021-10-11 02:28:30,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:28:30,587 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:28:30,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:28:30,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:28:30,595 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:28:30,596 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:28:30" (1/1) ... [2021-10-11 02:28:30,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66d00f2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:30, skipping insertion in model container [2021-10-11 02:28:30,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:28:30" (1/1) ... [2021-10-11 02:28:30,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:28:30,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:28:30,819 WARN L226 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_6946b067-8a6f-474f-bc3b-af56b6f4c657/sv-benchmarks/c/verifythis/duplets.c[485,498] [2021-10-11 02:28:30,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:28:30,928 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:28:30,953 WARN L226 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_6946b067-8a6f-474f-bc3b-af56b6f4c657/sv-benchmarks/c/verifythis/duplets.c[485,498] [2021-10-11 02:28:30,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:28:31,010 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:28:31,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:31 WrapperNode [2021-10-11 02:28:31,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:28:31,013 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:28:31,013 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:28:31,013 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:28:31,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:31" (1/1) ... [2021-10-11 02:28:31,045 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:31" (1/1) ... [2021-10-11 02:28:31,087 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:28:31,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:28:31,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:28:31,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:28:31,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:31" (1/1) ... [2021-10-11 02:28:31,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:31" (1/1) ... [2021-10-11 02:28:31,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:31" (1/1) ... [2021-10-11 02:28:31,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:31" (1/1) ... [2021-10-11 02:28:31,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:31" (1/1) ... [2021-10-11 02:28:31,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:31" (1/1) ... [2021-10-11 02:28:31,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:31" (1/1) ... [2021-10-11 02:28:31,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:28:31,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:28:31,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:28:31,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:28:31,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:31" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:28:31,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-11 02:28:31,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:28:31,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:28:31,219 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-11 02:28:31,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:28:31,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:28:31,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:28:31,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-11 02:28:31,762 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:28:31,762 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2021-10-11 02:28:31,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:28:31 BoogieIcfgContainer [2021-10-11 02:28:31,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:28:31,769 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:28:31,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:28:31,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:28:31,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:28:30" (1/3) ... [2021-10-11 02:28:31,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@469babb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:28:31, skipping insertion in model container [2021-10-11 02:28:31,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:31" (2/3) ... [2021-10-11 02:28:31,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@469babb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:28:31, skipping insertion in model container [2021-10-11 02:28:31,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:28:31" (3/3) ... [2021-10-11 02:28:31,779 INFO L111 eAbstractionObserver]: Analyzing ICFG duplets.c [2021-10-11 02:28:31,794 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:28:31,798 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2021-10-11 02:28:31,810 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-11 02:28:31,835 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:28:31,835 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:28:31,835 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:28:31,836 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:28:31,836 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:28:31,836 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:28:31,836 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:28:31,836 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:28:31,848 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2021-10-11 02:28:31,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-11 02:28:31,852 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:31,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:31,853 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:31,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:31,859 INFO L82 PathProgramCache]: Analyzing trace with hash 655320983, now seen corresponding path program 1 times [2021-10-11 02:28:31,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:28:31,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1685160759] [2021-10-11 02:28:31,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2021-10-11 02:28:32,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:32,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-11 02:28:32,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:32,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:28:32,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1685160759] [2021-10-11 02:28:32,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:32,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:28:32,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991460007] [2021-10-11 02:28:32,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 02:28:32,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:28:32,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 02:28:32,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:28:32,122 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 2 states. [2021-10-11 02:28:32,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:32,149 INFO L93 Difference]: Finished difference Result 89 states and 118 transitions. [2021-10-11 02:28:32,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:28:32,151 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2021-10-11 02:28:32,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:32,158 INFO L225 Difference]: With dead ends: 89 [2021-10-11 02:28:32,158 INFO L226 Difference]: Without dead ends: 42 [2021-10-11 02:28:32,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:28:32,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-11 02:28:32,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-11 02:28:32,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-10-11 02:28:32,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-10-11 02:28:32,195 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 17 [2021-10-11 02:28:32,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:32,196 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-10-11 02:28:32,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 02:28:32,196 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-10-11 02:28:32,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-11 02:28:32,197 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:32,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:32,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2021-10-11 02:28:32,416 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:32,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:32,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1826916331, now seen corresponding path program 1 times [2021-10-11 02:28:32,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:28:32,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [815204932] [2021-10-11 02:28:32,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2021-10-11 02:28:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:32,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-11 02:28:32,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:32,904 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:28:32,918 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:28:32,929 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-10-11 02:28:33,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:33,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:28:33,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [815204932] [2021-10-11 02:28:33,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:33,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-11 02:28:33,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738723893] [2021-10-11 02:28:33,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-10-11 02:28:33,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:28:33,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-11 02:28:33,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-11 02:28:33,251 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 11 states. [2021-10-11 02:28:33,609 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-10-11 02:28:33,755 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 17 [2021-10-11 02:28:33,928 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-10-11 02:28:34,178 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 23 [2021-10-11 02:28:34,490 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 31 [2021-10-11 02:28:34,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:34,638 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2021-10-11 02:28:34,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-11 02:28:34,639 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2021-10-11 02:28:34,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:34,641 INFO L225 Difference]: With dead ends: 96 [2021-10-11 02:28:34,641 INFO L226 Difference]: Without dead ends: 71 [2021-10-11 02:28:34,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-10-11 02:28:34,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-11 02:28:34,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 43. [2021-10-11 02:28:34,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-10-11 02:28:34,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-10-11 02:28:34,652 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 17 [2021-10-11 02:28:34,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:34,652 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-10-11 02:28:34,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-10-11 02:28:34,653 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-10-11 02:28:34,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:28:34,653 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:34,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:34,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2021-10-11 02:28:34,870 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:34,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:34,870 INFO L82 PathProgramCache]: Analyzing trace with hash -756845843, now seen corresponding path program 1 times [2021-10-11 02:28:34,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:28:34,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [849388740] [2021-10-11 02:28:34,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2021-10-11 02:28:34,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:34,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-11 02:28:34,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:35,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:35,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:28:35,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [849388740] [2021-10-11 02:28:35,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:35,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:28:35,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117573317] [2021-10-11 02:28:35,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:28:35,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:28:35,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:28:35,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:28:35,041 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 4 states. [2021-10-11 02:28:35,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:35,117 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2021-10-11 02:28:35,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:28:35,119 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-10-11 02:28:35,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:35,122 INFO L225 Difference]: With dead ends: 67 [2021-10-11 02:28:35,122 INFO L226 Difference]: Without dead ends: 65 [2021-10-11 02:28:35,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:28:35,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-11 02:28:35,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2021-10-11 02:28:35,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-10-11 02:28:35,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-10-11 02:28:35,149 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 18 [2021-10-11 02:28:35,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:35,150 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-10-11 02:28:35,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:28:35,150 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-10-11 02:28:35,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-11 02:28:35,151 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:35,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:35,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2021-10-11 02:28:35,375 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:35,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:35,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1244525418, now seen corresponding path program 1 times [2021-10-11 02:28:35,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:28:35,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903014674] [2021-10-11 02:28:35,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2021-10-11 02:28:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:35,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-11 02:28:35,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:35,751 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:28:35,754 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:28:35,756 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-10-11 02:28:36,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:36,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:28:36,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903014674] [2021-10-11 02:28:36,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:36,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-11 02:28:36,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167048674] [2021-10-11 02:28:36,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-10-11 02:28:36,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:28:36,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-11 02:28:36,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-11 02:28:36,107 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 12 states. [2021-10-11 02:28:36,647 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 17 [2021-10-11 02:28:36,779 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-10-11 02:28:37,005 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 23 [2021-10-11 02:28:37,321 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 31 [2021-10-11 02:28:37,578 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 35 [2021-10-11 02:28:37,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:37,777 INFO L93 Difference]: Finished difference Result 128 states and 142 transitions. [2021-10-11 02:28:37,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-11 02:28:37,778 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2021-10-11 02:28:37,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:37,779 INFO L225 Difference]: With dead ends: 128 [2021-10-11 02:28:37,779 INFO L226 Difference]: Without dead ends: 96 [2021-10-11 02:28:37,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-10-11 02:28:37,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-11 02:28:37,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 46. [2021-10-11 02:28:37,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-10-11 02:28:37,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-10-11 02:28:37,788 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 20 [2021-10-11 02:28:37,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:37,789 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-10-11 02:28:37,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-10-11 02:28:37,789 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-10-11 02:28:37,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-11 02:28:37,790 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:37,790 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:38,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2021-10-11 02:28:38,005 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:38,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:38,006 INFO L82 PathProgramCache]: Analyzing trace with hash 69607633, now seen corresponding path program 1 times [2021-10-11 02:28:38,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:28:38,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [57171239] [2021-10-11 02:28:38,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2021-10-11 02:28:38,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:38,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-11 02:28:38,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:38,168 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-11 02:28:38,170 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:28:38,186 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:28:38,188 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:28:38,189 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2021-10-11 02:28:38,228 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-10-11 02:28:38,230 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:28:38,246 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:28:38,248 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:28:38,249 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:7 [2021-10-11 02:28:38,266 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:28:38,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:38,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:28:38,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [57171239] [2021-10-11 02:28:38,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:38,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 02:28:38,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655316040] [2021-10-11 02:28:38,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:28:38,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:28:38,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:28:38,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:28:38,293 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 5 states. [2021-10-11 02:28:38,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:38,475 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2021-10-11 02:28:38,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:28:38,476 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2021-10-11 02:28:38,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:38,477 INFO L225 Difference]: With dead ends: 90 [2021-10-11 02:28:38,477 INFO L226 Difference]: Without dead ends: 72 [2021-10-11 02:28:38,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:28:38,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-11 02:28:38,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2021-10-11 02:28:38,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-10-11 02:28:38,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-10-11 02:28:38,487 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 22 [2021-10-11 02:28:38,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:38,487 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-10-11 02:28:38,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:28:38,487 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-10-11 02:28:38,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-11 02:28:38,488 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:38,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:38,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2021-10-11 02:28:38,704 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:38,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:38,704 INFO L82 PathProgramCache]: Analyzing trace with hash 69548051, now seen corresponding path program 1 times [2021-10-11 02:28:38,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:28:38,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [134276026] [2021-10-11 02:28:38,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2021-10-11 02:28:38,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:38,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-11 02:28:38,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:38,928 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-11 02:28:38,933 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:28:38,957 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:28:38,958 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:28:38,958 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-10-11 02:28:39,175 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-10-11 02:28:39,176 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:28:39,195 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:28:39,197 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-10-11 02:28:39,198 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2021-10-11 02:28:39,352 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:28:39,354 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:28:39,357 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:28:39,358 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:28:39,362 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:28:39,363 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:28:39,367 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-10-11 02:28:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:39,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:28:39,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [134276026] [2021-10-11 02:28:39,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:39,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-11 02:28:39,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145751258] [2021-10-11 02:28:39,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-10-11 02:28:39,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:28:39,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-11 02:28:39,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:28:39,413 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 10 states. [2021-10-11 02:28:39,807 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-10-11 02:28:40,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:40,348 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2021-10-11 02:28:40,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-11 02:28:40,349 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2021-10-11 02:28:40,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:40,350 INFO L225 Difference]: With dead ends: 96 [2021-10-11 02:28:40,350 INFO L226 Difference]: Without dead ends: 94 [2021-10-11 02:28:40,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-10-11 02:28:40,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-11 02:28:40,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 60. [2021-10-11 02:28:40,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-10-11 02:28:40,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2021-10-11 02:28:40,360 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 22 [2021-10-11 02:28:40,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:40,361 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2021-10-11 02:28:40,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-10-11 02:28:40,361 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2021-10-11 02:28:40,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-11 02:28:40,362 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:40,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:40,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2021-10-11 02:28:40,574 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:40,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:40,574 INFO L82 PathProgramCache]: Analyzing trace with hash 521545022, now seen corresponding path program 1 times [2021-10-11 02:28:40,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:28:40,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851826619] [2021-10-11 02:28:40,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2021-10-11 02:28:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:40,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-11 02:28:40,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:40,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:28:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:41,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851826619] [2021-10-11 02:28:41,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1216947319] [2021-10-11 02:28:41,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt [2021-10-11 02:28:41,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:41,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 02:28:41,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:41,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:28:41,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:41,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289264837] [2021-10-11 02:28:41,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:28:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:41,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:28:41,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:41,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:41,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:28:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:41,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-11 02:28:41,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 7, 8, 7, 6] total 22 [2021-10-11 02:28:41,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940407262] [2021-10-11 02:28:41,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:28:41,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:28:41,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:28:41,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-10-11 02:28:41,737 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 5 states. [2021-10-11 02:28:41,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:41,913 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2021-10-11 02:28:41,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:28:41,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2021-10-11 02:28:41,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:41,914 INFO L225 Difference]: With dead ends: 108 [2021-10-11 02:28:41,915 INFO L226 Difference]: Without dead ends: 83 [2021-10-11 02:28:41,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-10-11 02:28:41,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-11 02:28:41,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 63. [2021-10-11 02:28:41,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-10-11 02:28:41,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2021-10-11 02:28:41,925 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 23 [2021-10-11 02:28:41,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:41,925 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2021-10-11 02:28:41,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:28:41,925 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2021-10-11 02:28:41,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-11 02:28:41,927 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:41,927 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:42,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt,8 mathsat -unsat_core_generation=3,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:28:42,531 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:42,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:42,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1070089447, now seen corresponding path program 1 times [2021-10-11 02:28:42,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:28:42,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060308321] [2021-10-11 02:28:42,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2021-10-11 02:28:42,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:42,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-11 02:28:42,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:42,721 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-11 02:28:42,723 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:28:42,742 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:28:42,743 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:28:42,743 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-10-11 02:28:42,982 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-10-11 02:28:42,983 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:28:43,002 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:28:43,004 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-10-11 02:28:43,004 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2021-10-11 02:28:43,075 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:28:43,076 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:28:43,078 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:28:43,080 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:28:43,083 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:28:43,084 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:28:43,087 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-10-11 02:28:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:43,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:28:43,203 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 150 [2021-10-11 02:28:43,205 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2021-10-11 02:28:43,208 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:28:43,323 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-10-11 02:28:43,323 INFO L625 ElimStorePlain]: treesize reduction 39, result has 43.5 percent of original size [2021-10-11 02:28:43,329 INFO L639 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2021-10-11 02:28:43,331 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 4 xjuncts. [2021-10-11 02:28:43,332 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:22 [2021-10-11 02:28:43,704 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:28:43,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:43,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060308321] [2021-10-11 02:28:43,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1555778409] [2021-10-11 02:28:43,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt [2021-10-11 02:28:43,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:43,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-11 02:28:43,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:43,940 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-11 02:28:43,942 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:28:43,974 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:28:43,975 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:28:43,975 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-10-11 02:28:44,244 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-10-11 02:28:44,245 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:28:44,267 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:28:44,273 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:28:44,274 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:17 [2021-10-11 02:28:44,425 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:28:44,426 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:28:44,427 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-10-11 02:28:44,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:28:44,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:28:44,570 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 324 treesize of output 308 [2021-10-11 02:28:44,574 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:28:44,576 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-10-11 02:28:44,577 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2021-10-11 02:28:44,577 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:28:44,580 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2021-10-11 02:28:44,580 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:28:44,584 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-10-11 02:28:44,585 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:28:44,588 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2021-10-11 02:28:44,589 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:28:44,594 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2021-10-11 02:28:44,595 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:28:44,596 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:28:44,599 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2021-10-11 02:28:44,600 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:28:44,621 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:28:44,849 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2021-10-11 02:28:44,849 INFO L625 ElimStorePlain]: treesize reduction 206, result has 24.5 percent of original size [2021-10-11 02:28:44,851 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2021-10-11 02:28:44,853 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:28:44,854 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:28:44,859 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:28:44,865 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2021-10-11 02:28:44,865 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:88 [2021-10-11 02:28:45,257 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:28:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:28:45,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:28:45,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 9, 11] total 27 [2021-10-11 02:28:45,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116277796] [2021-10-11 02:28:45,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-10-11 02:28:45,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:28:45,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-11 02:28:45,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-10-11 02:28:45,273 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand 9 states. [2021-10-11 02:28:46,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:46,602 INFO L93 Difference]: Finished difference Result 102 states and 111 transitions. [2021-10-11 02:28:46,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-11 02:28:46,603 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2021-10-11 02:28:46,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:46,604 INFO L225 Difference]: With dead ends: 102 [2021-10-11 02:28:46,604 INFO L226 Difference]: Without dead ends: 100 [2021-10-11 02:28:46,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2021-10-11 02:28:46,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-11 02:28:46,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 58. [2021-10-11 02:28:46,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-10-11 02:28:46,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2021-10-11 02:28:46,613 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 25 [2021-10-11 02:28:46,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:46,614 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2021-10-11 02:28:46,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-10-11 02:28:46,614 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2021-10-11 02:28:46,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-11 02:28:46,615 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:46,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:47,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3,12 cvc4 --incremental --print-success --lang smt [2021-10-11 02:28:47,031 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:47,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:47,031 INFO L82 PathProgramCache]: Analyzing trace with hash -2028181769, now seen corresponding path program 1 times [2021-10-11 02:28:47,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:28:47,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242896687] [2021-10-11 02:28:47,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2021-10-11 02:28:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:47,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-11 02:28:47,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:47,235 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:28:47,235 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 39 [2021-10-11 02:28:47,237 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:28:47,275 INFO L625 ElimStorePlain]: treesize reduction 16, result has 59.0 percent of original size [2021-10-11 02:28:47,277 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:28:47,278 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:7 [2021-10-11 02:28:47,297 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:28:47,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:47,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:28:47,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242896687] [2021-10-11 02:28:47,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:47,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-11 02:28:47,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534716498] [2021-10-11 02:28:47,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:28:47,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:28:47,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:28:47,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:28:47,316 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 6 states. [2021-10-11 02:28:47,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:47,504 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2021-10-11 02:28:47,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:28:47,504 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2021-10-11 02:28:47,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:47,505 INFO L225 Difference]: With dead ends: 107 [2021-10-11 02:28:47,505 INFO L226 Difference]: Without dead ends: 95 [2021-10-11 02:28:47,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:28:47,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-11 02:28:47,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 67. [2021-10-11 02:28:47,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-10-11 02:28:47,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2021-10-11 02:28:47,514 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 26 [2021-10-11 02:28:47,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:47,515 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2021-10-11 02:28:47,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:28:47,515 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2021-10-11 02:28:47,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-11 02:28:47,516 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:47,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:47,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3 [2021-10-11 02:28:47,728 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:47,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:47,728 INFO L82 PathProgramCache]: Analyzing trace with hash -2028241351, now seen corresponding path program 1 times [2021-10-11 02:28:47,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:28:47,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111053831] [2021-10-11 02:28:47,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2021-10-11 02:28:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:47,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-11 02:28:47,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:48,043 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:28:48,043 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 39 [2021-10-11 02:28:48,044 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:28:48,082 INFO L625 ElimStorePlain]: treesize reduction 16, result has 64.4 percent of original size [2021-10-11 02:28:48,086 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:28:48,086 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:14 [2021-10-11 02:28:48,115 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:28:48,116 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:28:48,118 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-10-11 02:28:48,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:48,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:28:48,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1111053831] [2021-10-11 02:28:48,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:48,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-11 02:28:48,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155494548] [2021-10-11 02:28:48,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-10-11 02:28:48,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:28:48,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-11 02:28:48,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:28:48,161 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand 10 states. [2021-10-11 02:28:48,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:48,736 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2021-10-11 02:28:48,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-11 02:28:48,737 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2021-10-11 02:28:48,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:48,738 INFO L225 Difference]: With dead ends: 95 [2021-10-11 02:28:48,738 INFO L226 Difference]: Without dead ends: 93 [2021-10-11 02:28:48,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:28:48,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-10-11 02:28:48,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 69. [2021-10-11 02:28:48,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-10-11 02:28:48,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2021-10-11 02:28:48,749 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 26 [2021-10-11 02:28:48,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:48,750 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2021-10-11 02:28:48,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-10-11 02:28:48,750 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2021-10-11 02:28:48,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-11 02:28:48,751 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:48,751 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:48,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 mathsat -unsat_core_generation=3 [2021-10-11 02:28:48,962 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:48,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:48,963 INFO L82 PathProgramCache]: Analyzing trace with hash -760559199, now seen corresponding path program 2 times [2021-10-11 02:28:48,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:28:48,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2081761374] [2021-10-11 02:28:48,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2021-10-11 02:28:49,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:49,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-11 02:28:49,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:49,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:28:49,526 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 23 [2021-10-11 02:28:49,533 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:28:49,565 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:28:49,568 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-10-11 02:28:49,569 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:42 [2021-10-11 02:28:49,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:28:49,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:28:49,845 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:28:49,845 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 54 [2021-10-11 02:28:49,855 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2021-10-11 02:28:49,855 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-10-11 02:28:49,856 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2021-10-11 02:28:49,856 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:28:49,856 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-10-11 02:28:49,856 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:28:49,860 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-10-11 02:28:49,968 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-10-11 02:28:49,968 INFO L625 ElimStorePlain]: treesize reduction 29, result has 68.8 percent of original size [2021-10-11 02:28:49,972 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-10-11 02:28:49,972 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-10-11 02:28:49,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2081761374] [2021-10-11 02:28:49,975 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-10-11 02:28:49,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [207625919] [2021-10-11 02:28:49,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/cvc4 Starting monitored process 16 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4 --incremental --print-success --lang smt [2021-10-11 02:28:50,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 02:28:50,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:28:50,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-11 02:28:50,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:50,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:28:50,223 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 23 [2021-10-11 02:28:50,224 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:28:50,271 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:28:50,277 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-10-11 02:28:50,277 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:42 [2021-10-11 02:28:50,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:28:50,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:28:50,376 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:28:50,376 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 62 [2021-10-11 02:28:50,378 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2021-10-11 02:28:50,379 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-10-11 02:28:50,379 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2021-10-11 02:28:50,379 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:28:50,380 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-10-11 02:28:50,380 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:28:50,383 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-10-11 02:28:50,487 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-10-11 02:28:50,488 INFO L625 ElimStorePlain]: treesize reduction 12, result has 85.4 percent of original size [2021-10-11 02:28:50,491 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-10-11 02:28:50,492 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-10-11 02:28:50,493 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-10-11 02:28:50,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402342943] [2021-10-11 02:28:50,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6946b067-8a6f-474f-bc3b-af56b6f4c657/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:28:50,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 02:28:50,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:28:50,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-11 02:28:50,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:50,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:28:50,660 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 23 [2021-10-11 02:28:50,661 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:28:50,704 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:28:50,707 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-10-11 02:28:50,708 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:42 [2021-10-11 02:28:50,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:28:50,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:28:50,862 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:28:50,862 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2021-10-11 02:28:50,863 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2021-10-11 02:28:50,864 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-10-11 02:28:50,864 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2021-10-11 02:28:50,865 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:28:50,865 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-10-11 02:28:50,866 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:28:50,873 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-10-11 02:28:51,009 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-10-11 02:28:51,009 INFO L625 ElimStorePlain]: treesize reduction 3, result has 95.9 percent of original size [2021-10-11 02:28:51,011 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-10-11 02:28:51,012 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-10-11 02:28:51,012 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-10-11 02:28:51,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:51,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-11 02:28:51,013 ERROR L205 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-11 02:28:51,013 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:28:51,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 cvc4 --incremental --print-success --lang smt,15 mathsat -unsat_core_generation=3,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:28:51,633 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-10-11 02:28:51,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:28:51 BoogieIcfgContainer [2021-10-11 02:28:51,633 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:28:51,634 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:28:51,634 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:28:51,634 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:28:51,635 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:28:31" (3/4) ... [2021-10-11 02:28:51,638 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 02:28:51,638 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:28:51,639 INFO L168 Benchmark]: Toolchain (without parser) took 21052.23 ms. Allocated memory was 60.8 MB in the beginning and 94.4 MB in the end (delta: 33.6 MB). Free memory was 40.5 MB in the beginning and 29.3 MB in the end (delta: 11.2 MB). Peak memory consumption was 45.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:51,639 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 60.8 MB. Free memory is still 42.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:28:51,640 INFO L168 Benchmark]: CACSL2BoogieTranslator took 421.82 ms. Allocated memory is still 60.8 MB. Free memory was 40.2 MB in the beginning and 42.2 MB in the end (delta: -2.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:51,640 INFO L168 Benchmark]: Boogie Procedure Inliner took 73.82 ms. Allocated memory is still 60.8 MB. Free memory was 42.2 MB in the beginning and 40.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:51,641 INFO L168 Benchmark]: Boogie Preprocessor took 59.68 ms. Allocated memory is still 60.8 MB. Free memory was 40.3 MB in the beginning and 38.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:51,641 INFO L168 Benchmark]: RCFGBuilder took 617.53 ms. Allocated memory was 60.8 MB in the beginning and 77.6 MB in the end (delta: 16.8 MB). Free memory was 38.7 MB in the beginning and 47.1 MB in the end (delta: -8.4 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:51,642 INFO L168 Benchmark]: TraceAbstraction took 19864.82 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 46.8 MB in the beginning and 30.3 MB in the end (delta: 16.5 MB). Peak memory consumption was 32.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:51,642 INFO L168 Benchmark]: Witness Printer took 4.35 ms. Allocated memory is still 94.4 MB. Free memory was 30.3 MB in the beginning and 29.3 MB in the end (delta: 983.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:51,650 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 60.8 MB. Free memory is still 42.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 421.82 ms. Allocated memory is still 60.8 MB. Free memory was 40.2 MB in the beginning and 42.2 MB in the end (delta: -2.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 73.82 ms. Allocated memory is still 60.8 MB. Free memory was 42.2 MB in the beginning and 40.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 59.68 ms. Allocated memory is still 60.8 MB. Free memory was 40.3 MB in the beginning and 38.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 617.53 ms. Allocated memory was 60.8 MB in the beginning and 77.6 MB in the end (delta: 16.8 MB). Free memory was 38.7 MB in the beginning and 47.1 MB in the end (delta: -8.4 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 19864.82 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 46.8 MB in the beginning and 30.3 MB in the end (delta: 16.5 MB). Peak memory consumption was 32.2 MB. Max. memory is 16.1 GB. * Witness Printer took 4.35 ms. Allocated memory is still 94.4 MB. Free memory was 30.3 MB in the beginning and 29.3 MB in the end (delta: 983.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 10]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L49] int n = __VERIFIER_nondet_int(); [L16] COND FALSE !(!cond) [L52] int *a = calloc(n, sizeof(int)); [L20] int i = __VERIFIER_nondet_int(); [L21] int j = __VERIFIER_nondet_int(); [L16] COND FALSE !(!cond) [L16] COND FALSE !(!cond) [L16] COND FALSE !(!cond) [L27] int x = __VERIFIER_nondet_int(); [L29] a[i] = x [L30] a[j] = x [L56] int i,j; [L34] int i,j; [L36] i=0 [L36] COND TRUE i