./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH --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 6f20249a191004f50add5285446ee5ffba043f1ff9b40e0e115c641082e595e2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:18:58,155 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:18:58,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:18:58,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:18:58,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:18:58,221 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:18:58,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:18:58,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:18:58,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:18:58,234 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:18:58,235 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:18:58,237 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:18:58,237 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:18:58,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:18:58,241 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:18:58,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:18:58,247 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:18:58,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:18:58,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:18:58,259 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:18:58,261 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:18:58,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:18:58,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:18:58,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:18:58,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:18:58,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:18:58,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:18:58,280 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:18:58,280 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:18:58,282 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:18:58,282 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:18:58,283 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:18:58,285 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:18:58,286 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:18:58,287 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:18:58,287 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:18:58,288 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:18:58,288 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:18:58,288 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:18:58,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:18:58,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:18:58,290 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:18:58,332 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:18:58,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:18:58,334 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:18:58,334 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:18:58,334 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:18:58,335 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:18:58,335 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:18:58,335 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:18:58,335 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:18:58,335 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:18:58,336 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:18:58,337 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:18:58,337 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:18:58,337 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:18:58,337 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:18:58,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:18:58,338 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:18:58,338 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:18:58,338 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:18:58,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:18:58,339 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:18:58,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:18:58,339 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:18:58,339 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:18:58,339 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:18:58,340 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:18:58,340 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:18:58,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:18:58,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:18:58,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:18:58,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:18:58,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:18:58,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:18:58,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:18:58,343 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:18:58,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:18:58,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:18:58,343 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:18:58,344 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:18:58,344 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_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6f20249a191004f50add5285446ee5ffba043f1ff9b40e0e115c641082e595e2 [2021-11-03 04:18:58,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:18:58,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:18:58,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:18:58,652 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:18:58,652 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:18:58,653 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c [2021-11-03 04:18:58,720 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/data/6494b3170/352344cb91314969a51b6bc9ab752ba0/FLAG72df5ef0c [2021-11-03 04:18:59,275 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:18:59,275 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c [2021-11-03 04:18:59,302 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/data/6494b3170/352344cb91314969a51b6bc9ab752ba0/FLAG72df5ef0c [2021-11-03 04:18:59,499 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/data/6494b3170/352344cb91314969a51b6bc9ab752ba0 [2021-11-03 04:18:59,501 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:18:59,503 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:18:59,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:18:59,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:18:59,508 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:18:59,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:18:59" (1/1) ... [2021-11-03 04:18:59,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33bc891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:18:59, skipping insertion in model container [2021-11-03 04:18:59,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:18:59" (1/1) ... [2021-11-03 04:18:59,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:18:59,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:18:59,902 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c[17414,17427] [2021-11-03 04:19:00,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:19:00,231 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-03 04:19:00,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2cc4d931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:00, skipping insertion in model container [2021-11-03 04:19:00,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:19:00,233 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:19:00,235 INFO L168 Benchmark]: Toolchain (without parser) took 730.46 ms. Allocated memory is still 107.0 MB. Free memory was 63.2 MB in the beginning and 66.3 MB in the end (delta: -3.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. [2021-11-03 04:19:00,236 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 107.0 MB. Free memory is still 82.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:19:00,237 INFO L168 Benchmark]: CACSL2BoogieTranslator took 727.88 ms. Allocated memory is still 107.0 MB. Free memory was 63.0 MB in the beginning and 66.3 MB in the end (delta: -3.3 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. [2021-11-03 04:19:00,238 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 107.0 MB. Free memory is still 82.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 727.88 ms. Allocated memory is still 107.0 MB. Free memory was 63.0 MB in the beginning and 66.3 MB in the end (delta: -3.3 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2603]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH --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 6f20249a191004f50add5285446ee5ffba043f1ff9b40e0e115c641082e595e2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:19:02,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:19:02,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:19:02,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:19:02,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:19:02,392 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:19:02,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:19:02,396 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:19:02,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:19:02,400 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:19:02,401 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:19:02,402 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:19:02,403 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:19:02,404 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:19:02,405 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:19:02,407 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:19:02,408 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:19:02,409 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:19:02,411 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:19:02,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:19:02,416 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:19:02,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:19:02,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:19:02,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:19:02,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:19:02,432 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:19:02,432 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:19:02,433 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:19:02,434 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:19:02,435 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:19:02,435 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:19:02,436 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:19:02,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:19:02,438 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:19:02,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:19:02,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:19:02,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:19:02,441 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:19:02,441 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:19:02,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:19:02,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:19:02,452 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 04:19:02,499 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:19:02,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:19:02,501 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:19:02,501 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:19:02,502 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:19:02,502 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:19:02,502 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:19:02,502 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:19:02,502 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:19:02,504 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:19:02,505 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:19:02,505 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:19:02,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:19:02,505 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:19:02,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:19:02,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:19:02,506 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:19:02,506 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:19:02,506 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:19:02,506 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:19:02,506 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:19:02,507 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:19:02,507 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:19:02,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:19:02,507 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:19:02,507 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:19:02,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:19:02,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:19:02,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:19:02,508 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:19:02,508 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:19:02,509 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:19:02,509 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:19:02,509 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:19:02,509 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:19:02,509 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_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6f20249a191004f50add5285446ee5ffba043f1ff9b40e0e115c641082e595e2 [2021-11-03 04:19:02,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:19:02,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:19:02,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:19:02,888 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:19:02,889 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:19:02,889 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c [2021-11-03 04:19:02,972 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/data/208f20f55/5a38e2e1221b44f7a6d26a8315357154/FLAG275d29a71 [2021-11-03 04:19:03,745 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:19:03,745 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c [2021-11-03 04:19:03,780 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/data/208f20f55/5a38e2e1221b44f7a6d26a8315357154/FLAG275d29a71 [2021-11-03 04:19:03,910 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/data/208f20f55/5a38e2e1221b44f7a6d26a8315357154 [2021-11-03 04:19:03,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:19:03,914 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:19:03,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:19:03,915 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:19:03,919 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:19:03,919 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:19:03" (1/1) ... [2021-11-03 04:19:03,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3263ff86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:03, skipping insertion in model container [2021-11-03 04:19:03,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:19:03" (1/1) ... [2021-11-03 04:19:03,928 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:19:04,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:19:04,275 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c[17414,17427] [2021-11-03 04:19:04,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:19:04,691 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:19:04,718 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:19:04,749 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c[17414,17427] [2021-11-03 04:19:04,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:19:04,886 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:19:04,924 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c[17414,17427] [2021-11-03 04:19:04,974 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:19:05,007 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:19:05,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:05 WrapperNode [2021-11-03 04:19:05,008 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:19:05,009 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:19:05,009 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:19:05,009 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:19:05,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:05" (1/1) ... [2021-11-03 04:19:05,050 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:05" (1/1) ... [2021-11-03 04:19:05,506 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:19:05,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:19:05,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:19:05,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:19:05,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:05" (1/1) ... [2021-11-03 04:19:05,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:05" (1/1) ... [2021-11-03 04:19:05,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:05" (1/1) ... [2021-11-03 04:19:05,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:05" (1/1) ... [2021-11-03 04:19:05,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:05" (1/1) ... [2021-11-03 04:19:06,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:05" (1/1) ... [2021-11-03 04:19:06,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:05" (1/1) ... [2021-11-03 04:19:06,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:19:06,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:19:06,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:19:06,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:19:06,277 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:05" (1/1) ... [2021-11-03 04:19:06,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:19:06,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:19:06,345 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:19:06,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:19:06,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:19:06,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:19:06,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:19:06,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:19:22,799 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:19:22,800 INFO L299 CfgBuilder]: Removed 1697 assume(true) statements. [2021-11-03 04:19:22,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:19:22 BoogieIcfgContainer [2021-11-03 04:19:22,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:19:22,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:19:22,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:19:22,820 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:19:22,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:19:03" (1/3) ... [2021-11-03 04:19:22,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b205b24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:19:22, skipping insertion in model container [2021-11-03 04:19:22,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:05" (2/3) ... [2021-11-03 04:19:22,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b205b24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:19:22, skipping insertion in model container [2021-11-03 04:19:22,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:19:22" (3/3) ... [2021-11-03 04:19:22,823 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product32.cil.c [2021-11-03 04:19:22,829 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:19:22,829 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-03 04:19:22,911 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:19:22,917 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 04:19:22,917 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-03 04:19:23,045 INFO L276 IsEmpty]: Start isEmpty. Operand has 7188 states, 7182 states have (on average 1.8884711779448622) internal successors, (13563), 7187 states have internal predecessors, (13563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:23,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-03 04:19:23,054 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:19:23,054 INFO L513 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] [2021-11-03 04:19:23,055 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:19:23,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:19:23,061 INFO L85 PathProgramCache]: Analyzing trace with hash -983298927, now seen corresponding path program 1 times [2021-11-03 04:19:23,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:19:23,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652830411] [2021-11-03 04:19:23,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:19:23,076 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:19:23,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:19:23,079 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:19:23,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:19:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:19:23,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 04:19:23,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:19:23,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:23,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:19:23,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:23,641 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:19:23,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [652830411] [2021-11-03 04:19:23,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [652830411] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:19:23,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:19:23,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:19:23,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215080962] [2021-11-03 04:19:23,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 04:19:23,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:19:23,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 04:19:23,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:19:23,686 INFO L87 Difference]: Start difference. First operand has 7188 states, 7182 states have (on average 1.8884711779448622) internal successors, (13563), 7187 states have internal predecessors, (13563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:23,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:19:23,908 INFO L93 Difference]: Finished difference Result 7207 states and 13586 transitions. [2021-11-03 04:19:23,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 04:19:23,909 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-03 04:19:23,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:19:23,974 INFO L225 Difference]: With dead ends: 7207 [2021-11-03 04:19:23,974 INFO L226 Difference]: Without dead ends: 7184 [2021-11-03 04:19:23,983 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:19:24,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7184 states. [2021-11-03 04:19:24,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7184 to 7184. [2021-11-03 04:19:24,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7184 states, 7179 states have (on average 1.8875888006686168) internal successors, (13551), 7183 states have internal predecessors, (13551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:24,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7184 states to 7184 states and 13551 transitions. [2021-11-03 04:19:24,273 INFO L78 Accepts]: Start accepts. Automaton has 7184 states and 13551 transitions. Word has length 26 [2021-11-03 04:19:24,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:19:24,274 INFO L470 AbstractCegarLoop]: Abstraction has 7184 states and 13551 transitions. [2021-11-03 04:19:24,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:24,274 INFO L276 IsEmpty]: Start isEmpty. Operand 7184 states and 13551 transitions. [2021-11-03 04:19:24,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-03 04:19:24,277 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:19:24,277 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:19:24,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:19:24,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:19:24,495 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:19:24,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:19:24,501 INFO L85 PathProgramCache]: Analyzing trace with hash -582640160, now seen corresponding path program 1 times [2021-11-03 04:19:24,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:19:24,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355731537] [2021-11-03 04:19:24,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:19:24,503 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:19:24,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:19:24,504 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:19:24,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:19:24,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:19:24,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:19:24,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:19:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:24,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:19:25,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:25,000 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:19:25,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355731537] [2021-11-03 04:19:25,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355731537] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:19:25,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:19:25,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:19:25,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126897620] [2021-11-03 04:19:25,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:19:25,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:19:25,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:19:25,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:19:25,004 INFO L87 Difference]: Start difference. First operand 7184 states and 13551 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:25,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:19:25,503 INFO L93 Difference]: Finished difference Result 14355 states and 27083 transitions. [2021-11-03 04:19:25,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:19:25,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-03 04:19:25,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:19:25,556 INFO L225 Difference]: With dead ends: 14355 [2021-11-03 04:19:25,556 INFO L226 Difference]: Without dead ends: 7184 [2021-11-03 04:19:25,575 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:19:25,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7184 states. [2021-11-03 04:19:25,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7184 to 7184. [2021-11-03 04:19:25,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7184 states, 7179 states have (on average 1.8867530296698705) internal successors, (13545), 7183 states have internal predecessors, (13545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:25,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7184 states to 7184 states and 13545 transitions. [2021-11-03 04:19:25,868 INFO L78 Accepts]: Start accepts. Automaton has 7184 states and 13545 transitions. Word has length 28 [2021-11-03 04:19:25,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:19:25,869 INFO L470 AbstractCegarLoop]: Abstraction has 7184 states and 13545 transitions. [2021-11-03 04:19:25,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:25,871 INFO L276 IsEmpty]: Start isEmpty. Operand 7184 states and 13545 transitions. [2021-11-03 04:19:25,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-03 04:19:25,875 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:19:25,880 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:19:26,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:19:26,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:19:26,251 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:19:26,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:19:26,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1491748970, now seen corresponding path program 1 times [2021-11-03 04:19:26,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:19:26,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063222628] [2021-11-03 04:19:26,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:19:26,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:19:26,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:19:26,255 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:19:26,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:19:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:19:26,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:19:26,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:19:26,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:26,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:19:26,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:26,817 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:19:26,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063222628] [2021-11-03 04:19:26,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063222628] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:19:26,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:19:26,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:19:26,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308559232] [2021-11-03 04:19:26,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:19:26,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:19:26,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:19:26,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:19:26,820 INFO L87 Difference]: Start difference. First operand 7184 states and 13545 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:27,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:19:27,437 INFO L93 Difference]: Finished difference Result 14319 states and 27006 transitions. [2021-11-03 04:19:27,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:19:27,438 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-03 04:19:27,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:19:27,508 INFO L225 Difference]: With dead ends: 14319 [2021-11-03 04:19:27,508 INFO L226 Difference]: Without dead ends: 7157 [2021-11-03 04:19:27,593 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:19:27,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7157 states. [2021-11-03 04:19:27,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7157 to 7157. [2021-11-03 04:19:27,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7157 states, 7152 states have (on average 1.886045861297539) internal successors, (13489), 7156 states have internal predecessors, (13489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:27,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7157 states to 7157 states and 13489 transitions. [2021-11-03 04:19:27,863 INFO L78 Accepts]: Start accepts. Automaton has 7157 states and 13489 transitions. Word has length 33 [2021-11-03 04:19:27,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:19:27,863 INFO L470 AbstractCegarLoop]: Abstraction has 7157 states and 13489 transitions. [2021-11-03 04:19:27,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:27,865 INFO L276 IsEmpty]: Start isEmpty. Operand 7157 states and 13489 transitions. [2021-11-03 04:19:27,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 04:19:27,866 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:19:27,867 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:19:27,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:19:28,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:19:28,080 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:19:28,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:19:28,080 INFO L85 PathProgramCache]: Analyzing trace with hash 2079513228, now seen corresponding path program 1 times [2021-11-03 04:19:28,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:19:28,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816452456] [2021-11-03 04:19:28,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:19:28,083 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:19:28,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:19:28,085 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:19:28,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:19:28,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:19:28,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:19:28,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:19:28,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:28,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:19:28,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:28,644 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:19:28,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816452456] [2021-11-03 04:19:28,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816452456] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:19:28,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:19:28,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:19:28,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033638112] [2021-11-03 04:19:28,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:19:28,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:19:28,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:19:28,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:19:28,648 INFO L87 Difference]: Start difference. First operand 7157 states and 13489 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:29,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:19:29,041 INFO L93 Difference]: Finished difference Result 14292 states and 26950 transitions. [2021-11-03 04:19:29,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:19:29,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-03 04:19:29,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:19:29,060 INFO L225 Difference]: With dead ends: 14292 [2021-11-03 04:19:29,060 INFO L226 Difference]: Without dead ends: 7157 [2021-11-03 04:19:29,070 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:19:29,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7157 states. [2021-11-03 04:19:29,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7157 to 7157. [2021-11-03 04:19:29,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7157 states, 7152 states have (on average 1.8852069351230425) internal successors, (13483), 7156 states have internal predecessors, (13483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:29,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7157 states to 7157 states and 13483 transitions. [2021-11-03 04:19:29,337 INFO L78 Accepts]: Start accepts. Automaton has 7157 states and 13483 transitions. Word has length 34 [2021-11-03 04:19:29,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:19:29,338 INFO L470 AbstractCegarLoop]: Abstraction has 7157 states and 13483 transitions. [2021-11-03 04:19:29,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:29,338 INFO L276 IsEmpty]: Start isEmpty. Operand 7157 states and 13483 transitions. [2021-11-03 04:19:29,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-03 04:19:29,341 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:19:29,341 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:19:29,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:19:29,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:19:29,562 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:19:29,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:19:29,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1113049123, now seen corresponding path program 1 times [2021-11-03 04:19:29,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:19:29,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864569546] [2021-11-03 04:19:29,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:19:29,564 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:19:29,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:19:29,569 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:19:29,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:19:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:19:29,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:19:29,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:19:30,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:30,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:19:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:30,208 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:19:30,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864569546] [2021-11-03 04:19:30,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864569546] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:19:30,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:19:30,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:19:30,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731012458] [2021-11-03 04:19:30,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:19:30,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:19:30,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:19:30,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:19:30,211 INFO L87 Difference]: Start difference. First operand 7157 states and 13483 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:30,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:19:30,781 INFO L93 Difference]: Finished difference Result 14286 states and 26933 transitions. [2021-11-03 04:19:30,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:19:30,782 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-03 04:19:30,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:19:30,802 INFO L225 Difference]: With dead ends: 14286 [2021-11-03 04:19:30,802 INFO L226 Difference]: Without dead ends: 7154 [2021-11-03 04:19:30,814 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:19:30,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7154 states. [2021-11-03 04:19:31,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7154 to 7154. [2021-11-03 04:19:31,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7154 states, 7149 states have (on average 1.8848790040565113) internal successors, (13475), 7153 states have internal predecessors, (13475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:31,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7154 states to 7154 states and 13475 transitions. [2021-11-03 04:19:31,177 INFO L78 Accepts]: Start accepts. Automaton has 7154 states and 13475 transitions. Word has length 39 [2021-11-03 04:19:31,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:19:31,177 INFO L470 AbstractCegarLoop]: Abstraction has 7154 states and 13475 transitions. [2021-11-03 04:19:31,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:31,178 INFO L276 IsEmpty]: Start isEmpty. Operand 7154 states and 13475 transitions. [2021-11-03 04:19:31,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 04:19:31,179 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:19:31,179 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:19:31,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:19:31,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:19:31,396 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:19:31,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:19:31,397 INFO L85 PathProgramCache]: Analyzing trace with hash -888016467, now seen corresponding path program 1 times [2021-11-03 04:19:31,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:19:31,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2075824307] [2021-11-03 04:19:31,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:19:31,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:19:31,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:19:31,400 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:19:31,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:19:31,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:19:31,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:19:31,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:19:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:32,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:19:32,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:32,214 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:19:32,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2075824307] [2021-11-03 04:19:32,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2075824307] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:19:32,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:19:32,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 04:19:32,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455109914] [2021-11-03 04:19:32,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:19:32,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:19:32,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:19:32,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:19:32,217 INFO L87 Difference]: Start difference. First operand 7154 states and 13475 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:33,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:19:33,623 INFO L93 Difference]: Finished difference Result 18488 states and 34897 transitions. [2021-11-03 04:19:33,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:19:33,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-03 04:19:33,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:19:33,664 INFO L225 Difference]: With dead ends: 18488 [2021-11-03 04:19:33,664 INFO L226 Difference]: Without dead ends: 14869 [2021-11-03 04:19:33,673 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:19:33,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14869 states. [2021-11-03 04:19:34,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14869 to 9296. [2021-11-03 04:19:34,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9296 states, 9291 states have (on average 1.8865568830050587) internal successors, (17528), 9295 states have internal predecessors, (17528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:34,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9296 states to 9296 states and 17528 transitions. [2021-11-03 04:19:34,074 INFO L78 Accepts]: Start accepts. Automaton has 9296 states and 17528 transitions. Word has length 40 [2021-11-03 04:19:34,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:19:34,075 INFO L470 AbstractCegarLoop]: Abstraction has 9296 states and 17528 transitions. [2021-11-03 04:19:34,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:34,075 INFO L276 IsEmpty]: Start isEmpty. Operand 9296 states and 17528 transitions. [2021-11-03 04:19:34,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 04:19:34,081 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:19:34,081 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:19:34,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:19:34,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:19:34,352 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:19:34,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:19:34,353 INFO L85 PathProgramCache]: Analyzing trace with hash -608244677, now seen corresponding path program 1 times [2021-11-03 04:19:34,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:19:34,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1968152418] [2021-11-03 04:19:34,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:19:34,354 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:19:34,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:19:34,355 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:19:34,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:19:34,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:19:34,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:19:34,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:19:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:34,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:19:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:35,121 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:19:35,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1968152418] [2021-11-03 04:19:35,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1968152418] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:19:35,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:19:35,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-03 04:19:35,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589380147] [2021-11-03 04:19:35,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:19:35,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:19:35,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:19:35,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:19:35,123 INFO L87 Difference]: Start difference. First operand 9296 states and 17528 transitions. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:35,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:19:35,759 INFO L93 Difference]: Finished difference Result 17350 states and 32526 transitions. [2021-11-03 04:19:35,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 04:19:35,761 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 04:19:35,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:19:35,786 INFO L225 Difference]: With dead ends: 17350 [2021-11-03 04:19:35,786 INFO L226 Difference]: Without dead ends: 9317 [2021-11-03 04:19:35,800 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:19:35,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9317 states. [2021-11-03 04:19:36,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9317 to 6531. [2021-11-03 04:19:36,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6531 states, 6526 states have (on average 1.8813974869751762) internal successors, (12278), 6530 states have internal predecessors, (12278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:36,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6531 states to 6531 states and 12278 transitions. [2021-11-03 04:19:36,253 INFO L78 Accepts]: Start accepts. Automaton has 6531 states and 12278 transitions. Word has length 59 [2021-11-03 04:19:36,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:19:36,254 INFO L470 AbstractCegarLoop]: Abstraction has 6531 states and 12278 transitions. [2021-11-03 04:19:36,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:36,254 INFO L276 IsEmpty]: Start isEmpty. Operand 6531 states and 12278 transitions. [2021-11-03 04:19:36,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 04:19:36,258 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:19:36,258 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:19:36,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:19:36,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:19:36,472 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:19:36,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:19:36,473 INFO L85 PathProgramCache]: Analyzing trace with hash 2125982373, now seen corresponding path program 1 times [2021-11-03 04:19:36,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:19:36,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [925305692] [2021-11-03 04:19:36,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:19:36,474 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:19:36,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:19:36,475 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:19:36,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:19:36,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:19:36,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:19:36,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:19:37,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:37,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:19:37,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:37,219 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:19:37,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [925305692] [2021-11-03 04:19:37,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [925305692] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:19:37,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:19:37,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:19:37,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809368638] [2021-11-03 04:19:37,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:19:37,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:19:37,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:19:37,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:19:37,222 INFO L87 Difference]: Start difference. First operand 6531 states and 12278 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:41,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:19:41,115 INFO L93 Difference]: Finished difference Result 22897 states and 43080 transitions. [2021-11-03 04:19:41,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:19:41,117 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 04:19:41,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:19:41,152 INFO L225 Difference]: With dead ends: 22897 [2021-11-03 04:19:41,152 INFO L226 Difference]: Without dead ends: 16400 [2021-11-03 04:19:41,163 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:19:41,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16400 states. [2021-11-03 04:19:41,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16400 to 6531. [2021-11-03 04:19:41,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6531 states, 6526 states have (on average 1.825927060986822) internal successors, (11916), 6530 states have internal predecessors, (11916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:41,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6531 states to 6531 states and 11916 transitions. [2021-11-03 04:19:41,527 INFO L78 Accepts]: Start accepts. Automaton has 6531 states and 11916 transitions. Word has length 60 [2021-11-03 04:19:41,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:19:41,529 INFO L470 AbstractCegarLoop]: Abstraction has 6531 states and 11916 transitions. [2021-11-03 04:19:41,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:41,530 INFO L276 IsEmpty]: Start isEmpty. Operand 6531 states and 11916 transitions. [2021-11-03 04:19:41,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 04:19:41,532 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:19:41,533 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:19:41,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:19:41,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:19:41,753 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:19:41,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:19:41,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1379453895, now seen corresponding path program 1 times [2021-11-03 04:19:41,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:19:41,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681685865] [2021-11-03 04:19:41,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:19:41,754 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:19:41,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:19:41,754 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:19:41,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:19:42,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:19:42,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:19:42,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:19:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:42,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:19:42,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:42,520 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:19:42,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681685865] [2021-11-03 04:19:42,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681685865] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:19:42,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:19:42,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:19:42,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084115117] [2021-11-03 04:19:42,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:19:42,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:19:42,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:19:42,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:19:42,522 INFO L87 Difference]: Start difference. First operand 6531 states and 11916 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:44,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:19:44,973 INFO L93 Difference]: Finished difference Result 17909 states and 32966 transitions. [2021-11-03 04:19:44,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:19:44,974 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-03 04:19:44,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:19:44,997 INFO L225 Difference]: With dead ends: 17909 [2021-11-03 04:19:44,997 INFO L226 Difference]: Without dead ends: 11439 [2021-11-03 04:19:45,006 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-03 04:19:45,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11439 states. [2021-11-03 04:19:45,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11439 to 6427. [2021-11-03 04:19:45,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6427 states, 6422 states have (on average 1.8268452195577702) internal successors, (11732), 6426 states have internal predecessors, (11732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:45,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6427 states to 6427 states and 11732 transitions. [2021-11-03 04:19:45,369 INFO L78 Accepts]: Start accepts. Automaton has 6427 states and 11732 transitions. Word has length 68 [2021-11-03 04:19:45,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:19:45,369 INFO L470 AbstractCegarLoop]: Abstraction has 6427 states and 11732 transitions. [2021-11-03 04:19:45,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:45,370 INFO L276 IsEmpty]: Start isEmpty. Operand 6427 states and 11732 transitions. [2021-11-03 04:19:45,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 04:19:45,373 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:19:45,373 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:19:45,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:19:45,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:19:45,587 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:19:45,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:19:45,587 INFO L85 PathProgramCache]: Analyzing trace with hash 862258006, now seen corresponding path program 1 times [2021-11-03 04:19:45,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:19:45,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853783072] [2021-11-03 04:19:45,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:19:45,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:19:45,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:19:45,589 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:19:45,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:19:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:19:46,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:19:46,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:19:46,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:46,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:19:47,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:47,916 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:19:47,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853783072] [2021-11-03 04:19:47,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853783072] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:19:47,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:19:47,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:19:47,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186847715] [2021-11-03 04:19:47,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:19:47,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:19:47,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:19:47,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:19:47,918 INFO L87 Difference]: Start difference. First operand 6427 states and 11732 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:51,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:19:51,420 INFO L93 Difference]: Finished difference Result 20310 states and 37083 transitions. [2021-11-03 04:19:51,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:19:51,424 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-03 04:19:51,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:19:51,445 INFO L225 Difference]: With dead ends: 20310 [2021-11-03 04:19:51,446 INFO L226 Difference]: Without dead ends: 13936 [2021-11-03 04:19:51,452 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:19:51,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13936 states. [2021-11-03 04:19:51,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13936 to 8874. [2021-11-03 04:19:51,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8874 states, 8869 states have (on average 1.8138459803811027) internal successors, (16087), 8873 states have internal predecessors, (16087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:51,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8874 states to 8874 states and 16087 transitions. [2021-11-03 04:19:51,976 INFO L78 Accepts]: Start accepts. Automaton has 8874 states and 16087 transitions. Word has length 71 [2021-11-03 04:19:51,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:19:51,977 INFO L470 AbstractCegarLoop]: Abstraction has 8874 states and 16087 transitions. [2021-11-03 04:19:51,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:51,977 INFO L276 IsEmpty]: Start isEmpty. Operand 8874 states and 16087 transitions. [2021-11-03 04:19:51,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-03 04:19:51,980 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:19:51,980 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:19:51,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:19:52,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:19:52,194 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:19:52,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:19:52,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1113679123, now seen corresponding path program 1 times [2021-11-03 04:19:52,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:19:52,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1866224761] [2021-11-03 04:19:52,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:19:52,196 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:19:52,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:19:52,197 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:19:52,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:19:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:19:52,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:19:52,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:19:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:53,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:19:53,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:53,294 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:19:53,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1866224761] [2021-11-03 04:19:53,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1866224761] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:19:53,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:19:53,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:19:53,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615474665] [2021-11-03 04:19:53,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:19:53,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:19:53,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:19:53,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:19:53,296 INFO L87 Difference]: Start difference. First operand 8874 states and 16087 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:58,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:19:58,791 INFO L93 Difference]: Finished difference Result 35220 states and 64283 transitions. [2021-11-03 04:19:58,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:19:58,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-03 04:19:58,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:19:58,825 INFO L225 Difference]: With dead ends: 35220 [2021-11-03 04:19:58,825 INFO L226 Difference]: Without dead ends: 26398 [2021-11-03 04:19:58,836 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:19:58,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26398 states. [2021-11-03 04:19:59,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26398 to 8888. [2021-11-03 04:19:59,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8888 states, 8883 states have (on average 1.8125633232016212) internal successors, (16101), 8887 states have internal predecessors, (16101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:59,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8888 states to 8888 states and 16101 transitions. [2021-11-03 04:19:59,474 INFO L78 Accepts]: Start accepts. Automaton has 8888 states and 16101 transitions. Word has length 72 [2021-11-03 04:19:59,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:19:59,474 INFO L470 AbstractCegarLoop]: Abstraction has 8888 states and 16101 transitions. [2021-11-03 04:19:59,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:59,475 INFO L276 IsEmpty]: Start isEmpty. Operand 8888 states and 16101 transitions. [2021-11-03 04:19:59,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 04:19:59,478 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:19:59,478 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:19:59,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:19:59,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:19:59,692 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:19:59,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:19:59,692 INFO L85 PathProgramCache]: Analyzing trace with hash -223079496, now seen corresponding path program 1 times [2021-11-03 04:19:59,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:19:59,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537192486] [2021-11-03 04:19:59,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:19:59,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:19:59,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:19:59,694 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:19:59,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:20:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:20:00,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:20:00,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:20:00,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:20:00,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:20:00,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:20:00,660 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:20:00,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537192486] [2021-11-03 04:20:00,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537192486] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:20:00,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:20:00,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:20:00,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754015808] [2021-11-03 04:20:00,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:20:00,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:20:00,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:20:00,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:20:00,663 INFO L87 Difference]: Start difference. First operand 8888 states and 16101 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:08,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:20:08,730 INFO L93 Difference]: Finished difference Result 27652 states and 50448 transitions. [2021-11-03 04:20:08,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:20:08,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-03 04:20:08,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:20:08,754 INFO L225 Difference]: With dead ends: 27652 [2021-11-03 04:20:08,754 INFO L226 Difference]: Without dead ends: 20432 [2021-11-03 04:20:08,767 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:20:08,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20432 states. [2021-11-03 04:20:09,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20432 to 15432. [2021-11-03 04:20:09,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15432 states, 15427 states have (on average 1.8138328903869838) internal successors, (27982), 15431 states have internal predecessors, (27982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:09,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15432 states to 15432 states and 27982 transitions. [2021-11-03 04:20:09,549 INFO L78 Accepts]: Start accepts. Automaton has 15432 states and 27982 transitions. Word has length 73 [2021-11-03 04:20:09,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:20:09,550 INFO L470 AbstractCegarLoop]: Abstraction has 15432 states and 27982 transitions. [2021-11-03 04:20:09,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:09,550 INFO L276 IsEmpty]: Start isEmpty. Operand 15432 states and 27982 transitions. [2021-11-03 04:20:09,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 04:20:09,554 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:20:09,554 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:20:09,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:20:09,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:20:09,754 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:20:09,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:20:09,755 INFO L85 PathProgramCache]: Analyzing trace with hash -809885510, now seen corresponding path program 1 times [2021-11-03 04:20:09,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:20:09,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776867965] [2021-11-03 04:20:09,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:20:09,756 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:20:09,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:20:09,757 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:20:09,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:20:10,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:20:10,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:20:10,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:20:10,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:20:10,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:20:10,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:20:10,714 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:20:10,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776867965] [2021-11-03 04:20:10,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776867965] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:20:10,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:20:10,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:20:10,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4993157] [2021-11-03 04:20:10,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:20:10,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:20:10,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:20:10,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:20:10,716 INFO L87 Difference]: Start difference. First operand 15432 states and 27982 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:15,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:20:15,104 INFO L93 Difference]: Finished difference Result 34844 states and 63427 transitions. [2021-11-03 04:20:15,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:20:15,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-03 04:20:15,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:20:15,127 INFO L225 Difference]: With dead ends: 34844 [2021-11-03 04:20:15,127 INFO L226 Difference]: Without dead ends: 21065 [2021-11-03 04:20:15,134 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:20:15,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21065 states. [2021-11-03 04:20:15,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21065 to 15949. [2021-11-03 04:20:15,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15949 states, 15944 states have (on average 1.7871299548419468) internal successors, (28494), 15948 states have internal predecessors, (28494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:15,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15949 states to 15949 states and 28494 transitions. [2021-11-03 04:20:15,813 INFO L78 Accepts]: Start accepts. Automaton has 15949 states and 28494 transitions. Word has length 73 [2021-11-03 04:20:15,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:20:15,814 INFO L470 AbstractCegarLoop]: Abstraction has 15949 states and 28494 transitions. [2021-11-03 04:20:15,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:15,814 INFO L276 IsEmpty]: Start isEmpty. Operand 15949 states and 28494 transitions. [2021-11-03 04:20:15,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-03 04:20:15,816 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:20:15,816 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:20:15,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:20:16,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:20:16,017 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:20:16,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:20:16,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1086645120, now seen corresponding path program 1 times [2021-11-03 04:20:16,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:20:16,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [220517819] [2021-11-03 04:20:16,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:20:16,018 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:20:16,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:20:16,019 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:20:16,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:20:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:20:16,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:20:16,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:20:16,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:20:16,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:20:16,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:20:16,984 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:20:16,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [220517819] [2021-11-03 04:20:16,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [220517819] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:20:16,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:20:16,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:20:16,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035596785] [2021-11-03 04:20:16,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:20:16,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:20:16,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:20:16,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:20:16,986 INFO L87 Difference]: Start difference. First operand 15949 states and 28494 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:21,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:20:21,800 INFO L93 Difference]: Finished difference Result 113322 states and 203939 transitions. [2021-11-03 04:20:21,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:20:21,800 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-03 04:20:21,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:20:21,914 INFO L225 Difference]: With dead ends: 113322 [2021-11-03 04:20:21,914 INFO L226 Difference]: Without dead ends: 97421 [2021-11-03 04:20:21,933 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:20:21,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97421 states. [2021-11-03 04:20:23,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97421 to 25771. [2021-11-03 04:20:23,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25771 states, 25766 states have (on average 1.7956609485368316) internal successors, (46267), 25770 states have internal predecessors, (46267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:23,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25771 states to 25771 states and 46267 transitions. [2021-11-03 04:20:23,715 INFO L78 Accepts]: Start accepts. Automaton has 25771 states and 46267 transitions. Word has length 75 [2021-11-03 04:20:23,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:20:23,716 INFO L470 AbstractCegarLoop]: Abstraction has 25771 states and 46267 transitions. [2021-11-03 04:20:23,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:23,716 INFO L276 IsEmpty]: Start isEmpty. Operand 25771 states and 46267 transitions. [2021-11-03 04:20:23,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-03 04:20:23,718 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:20:23,718 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:20:23,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:20:23,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:20:23,918 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:20:23,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:20:23,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1361404734, now seen corresponding path program 1 times [2021-11-03 04:20:23,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:20:23,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478178763] [2021-11-03 04:20:23,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:20:23,920 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:20:23,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:20:23,922 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:20:23,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:20:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:20:24,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:20:24,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:20:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:20:24,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:20:25,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:20:25,039 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:20:25,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478178763] [2021-11-03 04:20:25,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478178763] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:20:25,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:20:25,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:20:25,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709914594] [2021-11-03 04:20:25,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:20:25,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:20:25,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:20:25,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:20:25,041 INFO L87 Difference]: Start difference. First operand 25771 states and 46267 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:28,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:20:28,925 INFO L93 Difference]: Finished difference Result 63283 states and 114521 transitions. [2021-11-03 04:20:28,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 04:20:28,925 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-03 04:20:28,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:20:28,977 INFO L225 Difference]: With dead ends: 63283 [2021-11-03 04:20:28,977 INFO L226 Difference]: Without dead ends: 43146 [2021-11-03 04:20:28,992 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:20:29,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43146 states. [2021-11-03 04:20:30,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43146 to 25736. [2021-11-03 04:20:30,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25736 states, 25731 states have (on average 1.795383001049318) internal successors, (46197), 25735 states have internal predecessors, (46197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:30,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25736 states to 25736 states and 46197 transitions. [2021-11-03 04:20:30,545 INFO L78 Accepts]: Start accepts. Automaton has 25736 states and 46197 transitions. Word has length 75 [2021-11-03 04:20:30,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:20:30,546 INFO L470 AbstractCegarLoop]: Abstraction has 25736 states and 46197 transitions. [2021-11-03 04:20:30,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:30,546 INFO L276 IsEmpty]: Start isEmpty. Operand 25736 states and 46197 transitions. [2021-11-03 04:20:30,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-03 04:20:30,549 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:20:30,549 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:20:30,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-03 04:20:30,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:20:30,770 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:20:30,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:20:30,771 INFO L85 PathProgramCache]: Analyzing trace with hash -777663092, now seen corresponding path program 1 times [2021-11-03 04:20:30,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:20:30,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693911884] [2021-11-03 04:20:30,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:20:30,772 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:20:30,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:20:30,772 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:20:30,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 04:20:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:20:31,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:20:31,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:20:31,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:20:31,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:20:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:20:31,863 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:20:31,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693911884] [2021-11-03 04:20:31,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693911884] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:20:31,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:20:31,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:20:31,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870397643] [2021-11-03 04:20:31,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:20:31,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:20:31,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:20:31,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:20:31,864 INFO L87 Difference]: Start difference. First operand 25736 states and 46197 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:34,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:20:34,420 INFO L93 Difference]: Finished difference Result 69100 states and 124305 transitions. [2021-11-03 04:20:34,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:20:34,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-03 04:20:34,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:20:34,475 INFO L225 Difference]: With dead ends: 69100 [2021-11-03 04:20:34,475 INFO L226 Difference]: Without dead ends: 45267 [2021-11-03 04:20:34,490 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:20:34,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45267 states. [2021-11-03 04:20:36,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45267 to 45252. [2021-11-03 04:20:36,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45252 states, 45247 states have (on average 1.8010033814396536) internal successors, (81490), 45251 states have internal predecessors, (81490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:36,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45252 states to 45252 states and 81490 transitions. [2021-11-03 04:20:36,793 INFO L78 Accepts]: Start accepts. Automaton has 45252 states and 81490 transitions. Word has length 82 [2021-11-03 04:20:36,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:20:36,794 INFO L470 AbstractCegarLoop]: Abstraction has 45252 states and 81490 transitions. [2021-11-03 04:20:36,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:36,794 INFO L276 IsEmpty]: Start isEmpty. Operand 45252 states and 81490 transitions. [2021-11-03 04:20:36,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-03 04:20:36,797 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:20:36,797 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:20:36,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:20:37,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:20:37,008 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:20:37,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:20:37,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1588978159, now seen corresponding path program 1 times [2021-11-03 04:20:37,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:20:37,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768191958] [2021-11-03 04:20:37,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:20:37,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:20:37,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:20:37,012 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:20:37,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ce0ab8c-4e95-4191-b11d-b7634ee47954/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:20:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:20:37,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:20:37,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:20:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:20:37,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:20:38,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:20:38,237 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:20:38,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768191958] [2021-11-03 04:20:38,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768191958] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:20:38,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:20:38,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:20:38,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830430497] [2021-11-03 04:20:38,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:20:38,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:20:38,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:20:38,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:20:38,239 INFO L87 Difference]: Start difference. First operand 45252 states and 81490 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:42,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:20:42,994 INFO L93 Difference]: Finished difference Result 126372 states and 227806 transitions. [2021-11-03 04:20:42,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:20:42,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-03 04:20:42,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:20:43,253 INFO L225 Difference]: With dead ends: 126372 [2021-11-03 04:20:43,253 INFO L226 Difference]: Without dead ends: 84140 [2021-11-03 04:20:43,277 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:20:43,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84140 states.