./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product27.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_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/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_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/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_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/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 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:17:19,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:17:19,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:17:19,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:17:19,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:17:19,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:17:19,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:17:19,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:17:19,189 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:17:19,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:17:19,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:17:19,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:17:19,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:17:19,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:17:19,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:17:19,209 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:17:19,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:17:19,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:17:19,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:17:19,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:17:19,226 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:17:19,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:17:19,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:17:19,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:17:19,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:17:19,243 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:17:19,244 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:17:19,246 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:17:19,247 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:17:19,249 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:17:19,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:17:19,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:17:19,253 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:17:19,255 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:17:19,256 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:17:19,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:17:19,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:17:19,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:17:19,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:17:19,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:17:19,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:17:19,261 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:17:19,316 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:17:19,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:17:19,319 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:17:19,319 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:17:19,319 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:17:19,319 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:17:19,320 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:17:19,320 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:17:19,328 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:17:19,328 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:17:19,330 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:17:19,330 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:17:19,330 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:17:19,331 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:17:19,331 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:17:19,332 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:17:19,332 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:17:19,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:17:19,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:17:19,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:17:19,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:17:19,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:17:19,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:17:19,334 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:17:19,334 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:17:19,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:17:19,335 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:17:19,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:17:19,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:17:19,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:17:19,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:17:19,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:17:19,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:17:19,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:17:19,339 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:17:19,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:17:19,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:17:19,340 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:17:19,340 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:17:19,341 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_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e [2021-11-03 05:17:19,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:17:19,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:17:19,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:17:19,723 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:17:19,724 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:17:19,725 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2021-11-03 05:17:19,802 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/data/fb48eb4ca/24506b476cf840dfbce78d93226ceb72/FLAG472d46bbb [2021-11-03 05:17:20,480 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:17:20,480 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2021-11-03 05:17:20,528 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/data/fb48eb4ca/24506b476cf840dfbce78d93226ceb72/FLAG472d46bbb [2021-11-03 05:17:20,622 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/data/fb48eb4ca/24506b476cf840dfbce78d93226ceb72 [2021-11-03 05:17:20,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:17:20,626 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:17:20,628 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:17:20,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:17:20,632 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:17:20,633 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:17:20" (1/1) ... [2021-11-03 05:17:20,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e8058ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:20, skipping insertion in model container [2021-11-03 05:17:20,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:17:20" (1/1) ... [2021-11-03 05:17:20,642 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:17:20,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:17:20,907 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_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2021-11-03 05:17:21,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:17:21,359 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 05:17:21,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@491e66e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:21, skipping insertion in model container [2021-11-03 05:17:21,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:17:21,360 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 05:17:21,363 INFO L168 Benchmark]: Toolchain (without parser) took 734.71 ms. Allocated memory is still 123.7 MB. Free memory was 84.7 MB in the beginning and 82.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-03 05:17:21,365 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 123.7 MB. Free memory was 93.3 MB in the beginning and 93.3 MB in the end (delta: 21.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:17:21,367 INFO L168 Benchmark]: CACSL2BoogieTranslator took 731.90 ms. Allocated memory is still 123.7 MB. Free memory was 84.5 MB in the beginning and 82.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-03 05:17:21,369 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 123.7 MB. Free memory was 93.3 MB in the beginning and 93.3 MB in the end (delta: 21.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 731.90 ms. Allocated memory is still 123.7 MB. Free memory was 84.5 MB in the beginning and 82.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2095]: 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_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/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_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/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_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/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 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:17:23,578 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:17:23,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:17:23,618 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:17:23,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:17:23,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:17:23,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:17:23,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:17:23,627 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:17:23,628 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:17:23,629 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:17:23,631 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:17:23,631 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:17:23,633 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:17:23,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:17:23,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:17:23,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:17:23,638 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:17:23,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:17:23,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:17:23,646 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:17:23,647 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:17:23,649 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:17:23,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:17:23,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:17:23,655 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:17:23,655 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:17:23,656 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:17:23,657 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:17:23,658 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:17:23,661 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:17:23,663 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:17:23,664 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:17:23,665 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:17:23,667 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:17:23,668 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:17:23,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:17:23,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:17:23,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:17:23,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:17:23,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:17:23,676 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 05:17:23,727 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:17:23,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:17:23,729 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:17:23,729 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:17:23,729 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:17:23,730 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:17:23,730 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:17:23,730 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:17:23,730 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:17:23,732 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:17:23,733 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:17:23,734 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:17:23,734 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:17:23,734 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:17:23,734 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:17:23,735 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:17:23,735 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:17:23,735 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:17:23,735 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:17:23,736 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:17:23,736 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:17:23,736 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:17:23,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:17:23,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:17:23,737 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:17:23,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:17:23,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:17:23,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:17:23,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:17:23,738 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:17:23,739 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:17:23,739 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:17:23,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:17:23,739 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:17:23,740 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:17:23,740 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_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e [2021-11-03 05:17:24,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:17:24,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:17:24,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:17:24,160 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:17:24,161 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:17:24,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2021-11-03 05:17:24,242 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/data/8a846c25b/67c3abb8f93840469ddcca84886f846c/FLAGeb75fbcb1 [2021-11-03 05:17:24,936 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:17:24,937 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2021-11-03 05:17:24,956 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/data/8a846c25b/67c3abb8f93840469ddcca84886f846c/FLAGeb75fbcb1 [2021-11-03 05:17:25,112 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/data/8a846c25b/67c3abb8f93840469ddcca84886f846c [2021-11-03 05:17:25,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:17:25,117 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:17:25,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:17:25,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:17:25,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:17:25,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:17:25" (1/1) ... [2021-11-03 05:17:25,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d7d805f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:25, skipping insertion in model container [2021-11-03 05:17:25,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:17:25" (1/1) ... [2021-11-03 05:17:25,139 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:17:25,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:17:25,434 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_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2021-11-03 05:17:25,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:17:25,915 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 05:17:25,943 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:17:25,950 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_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2021-11-03 05:17:26,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:17:26,136 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:17:26,151 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_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2021-11-03 05:17:26,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:17:26,335 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:17:26,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:26 WrapperNode [2021-11-03 05:17:26,336 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:17:26,338 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:17:26,339 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:17:26,339 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:17:26,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:26" (1/1) ... [2021-11-03 05:17:26,410 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:26" (1/1) ... [2021-11-03 05:17:26,834 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:17:26,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:17:26,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:17:26,835 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:17:26,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:26" (1/1) ... [2021-11-03 05:17:26,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:26" (1/1) ... [2021-11-03 05:17:26,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:26" (1/1) ... [2021-11-03 05:17:26,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:26" (1/1) ... [2021-11-03 05:17:27,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:26" (1/1) ... [2021-11-03 05:17:27,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:26" (1/1) ... [2021-11-03 05:17:27,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:26" (1/1) ... [2021-11-03 05:17:27,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:17:27,468 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:17:27,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:17:27,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:17:27,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:26" (1/1) ... [2021-11-03 05:17:27,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:17:27,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:17:27,551 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:17:27,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:17:27,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:17:27,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:17:27,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:17:27,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:17:43,327 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:17:43,327 INFO L299 CfgBuilder]: Removed 1503 assume(true) statements. [2021-11-03 05:17:43,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:17:43 BoogieIcfgContainer [2021-11-03 05:17:43,338 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:17:43,340 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:17:43,340 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:17:43,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:17:43,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:17:25" (1/3) ... [2021-11-03 05:17:43,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23cff4db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:17:43, skipping insertion in model container [2021-11-03 05:17:43,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:26" (2/3) ... [2021-11-03 05:17:43,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23cff4db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:17:43, skipping insertion in model container [2021-11-03 05:17:43,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:17:43" (3/3) ... [2021-11-03 05:17:43,347 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product27.cil.c [2021-11-03 05:17:43,353 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:17:43,354 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-03 05:17:43,442 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:17:43,449 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 05:17:43,449 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-03 05:17:43,581 INFO L276 IsEmpty]: Start isEmpty. Operand has 6177 states, 6171 states have (on average 1.8820288445956894) internal successors, (11614), 6176 states have internal predecessors, (11614), 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 05:17:43,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-03 05:17:43,601 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:43,602 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] [2021-11-03 05:17:43,603 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 05:17:43,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:43,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1918734212, now seen corresponding path program 1 times [2021-11-03 05:17:43,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:17:43,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [841450930] [2021-11-03 05:17:43,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:43,625 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:17:43,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:17:43,628 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:17:43,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:17:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:44,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:17:44,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:17:44,340 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 05:17:44,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:17:44,479 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 05:17:44,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:17:44,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [841450930] [2021-11-03 05:17:44,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [841450930] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:44,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:44,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:17:44,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38088543] [2021-11-03 05:17:44,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:17:44,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:17:44,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:17:44,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:17:44,522 INFO L87 Difference]: Start difference. First operand has 6177 states, 6171 states have (on average 1.8820288445956894) internal successors, (11614), 6176 states have internal predecessors, (11614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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 05:17:45,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:45,497 INFO L93 Difference]: Finished difference Result 17350 states and 32619 transitions. [2021-11-03 05:17:45,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:17:45,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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 44 [2021-11-03 05:17:45,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:45,608 INFO L225 Difference]: With dead ends: 17350 [2021-11-03 05:17:45,608 INFO L226 Difference]: Without dead ends: 11173 [2021-11-03 05:17:45,630 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 84 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 05:17:45,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11173 states. [2021-11-03 05:17:45,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11173 to 6173. [2021-11-03 05:17:45,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6173 states, 6168 states have (on average 1.8797016861219196) internal successors, (11594), 6172 states have internal predecessors, (11594), 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 05:17:45,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6173 states to 6173 states and 11594 transitions. [2021-11-03 05:17:45,989 INFO L78 Accepts]: Start accepts. Automaton has 6173 states and 11594 transitions. Word has length 44 [2021-11-03 05:17:45,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:45,990 INFO L470 AbstractCegarLoop]: Abstraction has 6173 states and 11594 transitions. [2021-11-03 05:17:45,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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 05:17:45,990 INFO L276 IsEmpty]: Start isEmpty. Operand 6173 states and 11594 transitions. [2021-11-03 05:17:45,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-03 05:17:45,995 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:45,996 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] [2021-11-03 05:17:46,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-03 05:17:46,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:17:46,210 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 05:17:46,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:46,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1796359280, now seen corresponding path program 1 times [2021-11-03 05:17:46,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:17:46,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527628025] [2021-11-03 05:17:46,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:46,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:17:46,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:17:46,219 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:17:46,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:17:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:46,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:17:46,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:17:46,749 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 05:17:46,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:17:46,906 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 05:17:46,906 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:17:46,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527628025] [2021-11-03 05:17:46,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527628025] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:46,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:46,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:17:46,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296214273] [2021-11-03 05:17:46,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:17:46,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:17:46,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:17:46,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:17:46,916 INFO L87 Difference]: Start difference. First operand 6173 states and 11594 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:48,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:48,182 INFO L93 Difference]: Finished difference Result 24657 states and 46301 transitions. [2021-11-03 05:17:48,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:17:48,183 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-03 05:17:48,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:48,288 INFO L225 Difference]: With dead ends: 24657 [2021-11-03 05:17:48,289 INFO L226 Difference]: Without dead ends: 18505 [2021-11-03 05:17:48,303 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:17:48,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18505 states. [2021-11-03 05:17:48,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18505 to 6151. [2021-11-03 05:17:48,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6151 states, 6146 states have (on average 1.8781321184510251) internal successors, (11543), 6150 states have internal predecessors, (11543), 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 05:17:48,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6151 states to 6151 states and 11543 transitions. [2021-11-03 05:17:48,750 INFO L78 Accepts]: Start accepts. Automaton has 6151 states and 11543 transitions. Word has length 49 [2021-11-03 05:17:48,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:48,750 INFO L470 AbstractCegarLoop]: Abstraction has 6151 states and 11543 transitions. [2021-11-03 05:17:48,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:48,751 INFO L276 IsEmpty]: Start isEmpty. Operand 6151 states and 11543 transitions. [2021-11-03 05:17:48,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-03 05:17:48,754 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:48,755 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] [2021-11-03 05:17:48,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:17:48,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:17:48,969 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 05:17:48,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:48,970 INFO L85 PathProgramCache]: Analyzing trace with hash 165615760, now seen corresponding path program 1 times [2021-11-03 05:17:48,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:17:48,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292952635] [2021-11-03 05:17:48,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:48,972 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:17:48,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:17:48,973 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:17:48,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:17:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:49,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:17:49,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:17:49,570 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 05:17:49,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:17:49,767 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 05:17:49,768 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:17:49,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [292952635] [2021-11-03 05:17:49,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [292952635] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:49,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:49,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:17:49,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434567373] [2021-11-03 05:17:49,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:17:49,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:17:49,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:17:49,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:17:49,777 INFO L87 Difference]: Start difference. First operand 6151 states and 11543 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 05:17:50,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:50,384 INFO L93 Difference]: Finished difference Result 17209 states and 32307 transitions. [2021-11-03 05:17:50,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:17:50,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 50 [2021-11-03 05:17:50,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:50,421 INFO L225 Difference]: With dead ends: 17209 [2021-11-03 05:17:50,421 INFO L226 Difference]: Without dead ends: 11079 [2021-11-03 05:17:50,434 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 96 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 05:17:50,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11079 states. [2021-11-03 05:17:50,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11079 to 6151. [2021-11-03 05:17:50,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6151 states, 6146 states have (on average 1.8771558737390173) internal successors, (11537), 6150 states have internal predecessors, (11537), 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 05:17:50,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6151 states to 6151 states and 11537 transitions. [2021-11-03 05:17:50,783 INFO L78 Accepts]: Start accepts. Automaton has 6151 states and 11537 transitions. Word has length 50 [2021-11-03 05:17:50,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:50,784 INFO L470 AbstractCegarLoop]: Abstraction has 6151 states and 11537 transitions. [2021-11-03 05:17:50,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 05:17:50,787 INFO L276 IsEmpty]: Start isEmpty. Operand 6151 states and 11537 transitions. [2021-11-03 05:17:50,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-03 05:17:50,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:50,791 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] [2021-11-03 05:17:50,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:17:51,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:17:51,006 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 05:17:51,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:51,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1761270301, now seen corresponding path program 1 times [2021-11-03 05:17:51,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:17:51,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245087244] [2021-11-03 05:17:51,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:51,008 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:17:51,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:17:51,011 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:17:51,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:17:51,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:51,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 05:17:51,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:17:51,586 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 05:17:51,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:17:51,751 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 05:17:51,752 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:17:51,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245087244] [2021-11-03 05:17:51,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245087244] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:51,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:51,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 05:17:51,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475412015] [2021-11-03 05:17:51,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:17:51,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:17:51,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:17:51,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:17:51,756 INFO L87 Difference]: Start difference. First operand 6151 states and 11537 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 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 05:17:53,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:53,676 INFO L93 Difference]: Finished difference Result 34452 states and 64664 transitions. [2021-11-03 05:17:53,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:17:53,677 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 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 55 [2021-11-03 05:17:53,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:53,769 INFO L225 Difference]: With dead ends: 34452 [2021-11-03 05:17:53,769 INFO L226 Difference]: Without dead ends: 28325 [2021-11-03 05:17:53,782 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:17:53,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28325 states. [2021-11-03 05:17:54,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28325 to 6153. [2021-11-03 05:17:54,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6153 states, 6148 states have (on average 1.876057254391672) internal successors, (11534), 6152 states have internal predecessors, (11534), 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 05:17:54,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 11534 transitions. [2021-11-03 05:17:54,129 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 11534 transitions. Word has length 55 [2021-11-03 05:17:54,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:54,131 INFO L470 AbstractCegarLoop]: Abstraction has 6153 states and 11534 transitions. [2021-11-03 05:17:54,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 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 05:17:54,132 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 11534 transitions. [2021-11-03 05:17:54,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-03 05:17:54,135 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:54,135 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] [2021-11-03 05:17:54,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:17:54,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:17:54,350 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 05:17:54,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:54,351 INFO L85 PathProgramCache]: Analyzing trace with hash 698289871, now seen corresponding path program 1 times [2021-11-03 05:17:54,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:17:54,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [841774722] [2021-11-03 05:17:54,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:54,354 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:17:54,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:17:54,355 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:17:54,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:17:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:54,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:17:54,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:17:54,969 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 05:17:54,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:17:55,160 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 05:17:55,160 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:17:55,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [841774722] [2021-11-03 05:17:55,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [841774722] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:55,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:55,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 05:17:55,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332844949] [2021-11-03 05:17:55,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:17:55,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:17:55,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:17:55,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:17:55,163 INFO L87 Difference]: Start difference. First operand 6153 states and 11534 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 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 05:17:58,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:58,593 INFO L93 Difference]: Finished difference Result 22437 states and 42204 transitions. [2021-11-03 05:17:58,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:17:58,594 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 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 56 [2021-11-03 05:17:58,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:58,635 INFO L225 Difference]: With dead ends: 22437 [2021-11-03 05:17:58,635 INFO L226 Difference]: Without dead ends: 16314 [2021-11-03 05:17:58,647 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 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 05:17:58,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16314 states. [2021-11-03 05:17:58,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16314 to 6153. [2021-11-03 05:17:58,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6153 states, 6148 states have (on average 1.832465842550423) internal successors, (11266), 6152 states have internal predecessors, (11266), 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 05:17:58,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 11266 transitions. [2021-11-03 05:17:58,944 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 11266 transitions. Word has length 56 [2021-11-03 05:17:58,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:58,945 INFO L470 AbstractCegarLoop]: Abstraction has 6153 states and 11266 transitions. [2021-11-03 05:17:58,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 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 05:17:58,946 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 11266 transitions. [2021-11-03 05:17:58,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 05:17:58,951 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:58,951 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 05:17:58,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:17:59,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:17:59,170 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 05:17:59,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:59,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1500991975, now seen corresponding path program 1 times [2021-11-03 05:17:59,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:17:59,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754905027] [2021-11-03 05:17:59,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:59,172 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:17:59,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:17:59,173 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:17:59,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:17:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:59,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:17:59,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:17:59,793 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 05:17:59,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:17:59,999 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 05:17:59,999 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:17:59,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754905027] [2021-11-03 05:17:59,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1754905027] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:59,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:00,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 05:18:00,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758580012] [2021-11-03 05:18:00,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:18:00,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:00,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:18:00,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:18:00,001 INFO L87 Difference]: Start difference. First operand 6153 states and 11266 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 05:18:03,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:03,006 INFO L93 Difference]: Finished difference Result 30941 states and 57501 transitions. [2021-11-03 05:18:03,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-03 05:18:03,007 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 05:18:03,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:03,055 INFO L225 Difference]: With dead ends: 30941 [2021-11-03 05:18:03,055 INFO L226 Difference]: Without dead ends: 24836 [2021-11-03 05:18:03,072 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-11-03 05:18:03,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24836 states. [2021-11-03 05:18:03,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24836 to 8522. [2021-11-03 05:18:03,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8522 states, 8517 states have (on average 1.8328049782787366) internal successors, (15610), 8521 states have internal predecessors, (15610), 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 05:18:03,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8522 states to 8522 states and 15610 transitions. [2021-11-03 05:18:03,612 INFO L78 Accepts]: Start accepts. Automaton has 8522 states and 15610 transitions. Word has length 68 [2021-11-03 05:18:03,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:03,612 INFO L470 AbstractCegarLoop]: Abstraction has 8522 states and 15610 transitions. [2021-11-03 05:18:03,613 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 05:18:03,613 INFO L276 IsEmpty]: Start isEmpty. Operand 8522 states and 15610 transitions. [2021-11-03 05:18:03,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-03 05:18:03,616 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:03,616 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] [2021-11-03 05:18:03,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:03,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:03,831 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 05:18:03,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:03,831 INFO L85 PathProgramCache]: Analyzing trace with hash -771270727, now seen corresponding path program 1 times [2021-11-03 05:18:03,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:03,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1044554117] [2021-11-03 05:18:03,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:03,833 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:03,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:03,834 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:03,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:18:04,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:04,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:18:04,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:04,436 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 05:18:04,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:04,637 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 05:18:04,637 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:04,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1044554117] [2021-11-03 05:18:04,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1044554117] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:04,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:04,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:18:04,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825675348] [2021-11-03 05:18:04,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:18:04,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:04,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:18:04,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:18:04,639 INFO L87 Difference]: Start difference. First operand 8522 states and 15610 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 05:18:08,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:08,231 INFO L93 Difference]: Finished difference Result 40784 states and 75203 transitions. [2021-11-03 05:18:08,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 05:18:08,232 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 70 [2021-11-03 05:18:08,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:08,277 INFO L225 Difference]: With dead ends: 40784 [2021-11-03 05:18:08,277 INFO L226 Difference]: Without dead ends: 32309 [2021-11-03 05:18:08,293 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 135 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 05:18:08,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32309 states. [2021-11-03 05:18:08,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32309 to 10964. [2021-11-03 05:18:08,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10964 states, 10959 states have (on average 1.83128022629802) internal successors, (20069), 10963 states have internal predecessors, (20069), 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 05:18:08,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10964 states to 10964 states and 20069 transitions. [2021-11-03 05:18:08,933 INFO L78 Accepts]: Start accepts. Automaton has 10964 states and 20069 transitions. Word has length 70 [2021-11-03 05:18:08,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:08,934 INFO L470 AbstractCegarLoop]: Abstraction has 10964 states and 20069 transitions. [2021-11-03 05:18:08,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 05:18:08,934 INFO L276 IsEmpty]: Start isEmpty. Operand 10964 states and 20069 transitions. [2021-11-03 05:18:08,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 05:18:08,938 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:08,938 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 05:18:08,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:09,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:09,156 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 05:18:09,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:09,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1111135380, now seen corresponding path program 1 times [2021-11-03 05:18:09,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:09,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7282986] [2021-11-03 05:18:09,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:09,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:09,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:09,158 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:09,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:18:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:09,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:18:09,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:09,866 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 05:18:09,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:10,057 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 05:18:10,058 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:10,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [7282986] [2021-11-03 05:18:10,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [7282986] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:10,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:10,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:18:10,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994389351] [2021-11-03 05:18:10,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:18:10,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:10,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:18:10,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:18:10,060 INFO L87 Difference]: Start difference. First operand 10964 states and 20069 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 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 05:18:14,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:14,097 INFO L93 Difference]: Finished difference Result 40993 states and 75788 transitions. [2021-11-03 05:18:14,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:18:14,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 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 05:18:14,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:14,138 INFO L225 Difference]: With dead ends: 40993 [2021-11-03 05:18:14,139 INFO L226 Difference]: Without dead ends: 30063 [2021-11-03 05:18:14,156 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 138 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 05:18:14,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30063 states. [2021-11-03 05:18:14,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30063 to 19171. [2021-11-03 05:18:14,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19171 states, 19166 states have (on average 1.8187936971720755) internal successors, (34859), 19170 states have internal predecessors, (34859), 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 05:18:14,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19171 states to 19171 states and 34859 transitions. [2021-11-03 05:18:14,984 INFO L78 Accepts]: Start accepts. Automaton has 19171 states and 34859 transitions. Word has length 71 [2021-11-03 05:18:14,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:14,984 INFO L470 AbstractCegarLoop]: Abstraction has 19171 states and 34859 transitions. [2021-11-03 05:18:14,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 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 05:18:14,985 INFO L276 IsEmpty]: Start isEmpty. Operand 19171 states and 34859 transitions. [2021-11-03 05:18:14,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 05:18:14,987 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:14,987 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 05:18:15,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:15,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:15,202 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 05:18:15,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:15,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1141763356, now seen corresponding path program 1 times [2021-11-03 05:18:15,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:15,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43987180] [2021-11-03 05:18:15,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:15,203 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:15,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:15,204 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:15,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 05:18:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:15,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:18:15,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:15,943 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 05:18:15,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:16,171 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 05:18:16,172 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:16,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43987180] [2021-11-03 05:18:16,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43987180] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:16,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:16,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:18:16,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614966750] [2021-11-03 05:18:16,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:18:16,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:16,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:18:16,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:18:16,174 INFO L87 Difference]: Start difference. First operand 19171 states and 34859 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 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 05:18:20,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:20,163 INFO L93 Difference]: Finished difference Result 155234 states and 282853 transitions. [2021-11-03 05:18:20,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 05:18:20,164 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 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 05:18:20,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:20,371 INFO L225 Difference]: With dead ends: 155234 [2021-11-03 05:18:20,371 INFO L226 Difference]: Without dead ends: 136106 [2021-11-03 05:18:20,406 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 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 05:18:20,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136106 states. [2021-11-03 05:18:22,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136106 to 37141. [2021-11-03 05:18:22,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37141 states, 37136 states have (on average 1.819797501077122) internal successors, (67580), 37140 states have internal predecessors, (67580), 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 05:18:22,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37141 states to 37141 states and 67580 transitions. [2021-11-03 05:18:22,778 INFO L78 Accepts]: Start accepts. Automaton has 37141 states and 67580 transitions. Word has length 73 [2021-11-03 05:18:22,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:22,779 INFO L470 AbstractCegarLoop]: Abstraction has 37141 states and 67580 transitions. [2021-11-03 05:18:22,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 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 05:18:22,779 INFO L276 IsEmpty]: Start isEmpty. Operand 37141 states and 67580 transitions. [2021-11-03 05:18:22,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 05:18:22,783 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:22,783 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 05:18:22,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:23,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:23,000 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 05:18:23,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:23,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1985768858, now seen corresponding path program 1 times [2021-11-03 05:18:23,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:23,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1010987666] [2021-11-03 05:18:23,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:23,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:23,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:23,002 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:23,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 05:18:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:23,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:18:23,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:23,764 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 05:18:23,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:24,002 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 05:18:24,003 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:24,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1010987666] [2021-11-03 05:18:24,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1010987666] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:24,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:24,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 05:18:24,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788422125] [2021-11-03 05:18:24,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:18:24,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:24,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:18:24,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:18:24,005 INFO L87 Difference]: Start difference. First operand 37141 states and 67580 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 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 05:18:28,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:28,243 INFO L93 Difference]: Finished difference Result 90696 states and 166487 transitions. [2021-11-03 05:18:28,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-03 05:18:28,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 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 05:18:28,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:28,337 INFO L225 Difference]: With dead ends: 90696 [2021-11-03 05:18:28,337 INFO L226 Difference]: Without dead ends: 70742 [2021-11-03 05:18:28,354 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:18:28,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70742 states. [2021-11-03 05:18:29,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70742 to 37093. [2021-11-03 05:18:29,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37093 states, 37088 states have (on average 1.8195642795513374) internal successors, (67484), 37092 states have internal predecessors, (67484), 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 05:18:29,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37093 states to 37093 states and 67484 transitions. [2021-11-03 05:18:29,929 INFO L78 Accepts]: Start accepts. Automaton has 37093 states and 67484 transitions. Word has length 73 [2021-11-03 05:18:29,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:29,930 INFO L470 AbstractCegarLoop]: Abstraction has 37093 states and 67484 transitions. [2021-11-03 05:18:29,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 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 05:18:29,930 INFO L276 IsEmpty]: Start isEmpty. Operand 37093 states and 67484 transitions. [2021-11-03 05:18:29,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-03 05:18:29,935 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:29,935 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 05:18:29,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-03 05:18:30,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:30,138 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 05:18:30,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:30,139 INFO L85 PathProgramCache]: Analyzing trace with hash -405444256, now seen corresponding path program 1 times [2021-11-03 05:18:30,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:30,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1948098172] [2021-11-03 05:18:30,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:30,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:30,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:30,141 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:30,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:18:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:30,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:18:30,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:30,934 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 05:18:30,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:31,125 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 05:18:31,125 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:31,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1948098172] [2021-11-03 05:18:31,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1948098172] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:31,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:31,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:18:31,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834861787] [2021-11-03 05:18:31,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:18:31,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:31,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:18:31,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:18:31,128 INFO L87 Difference]: Start difference. First operand 37093 states and 67484 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 05:18:35,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:35,830 INFO L93 Difference]: Finished difference Result 142395 states and 260747 transitions. [2021-11-03 05:18:35,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 05:18:35,831 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 05:18:35,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:36,052 INFO L225 Difference]: With dead ends: 142395 [2021-11-03 05:18:36,053 INFO L226 Difference]: Without dead ends: 122470 [2021-11-03 05:18:36,089 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 05:18:36,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122470 states. [2021-11-03 05:18:38,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122470 to 55647. [2021-11-03 05:18:38,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55647 states, 55642 states have (on average 1.8148161460767047) internal successors, (100980), 55646 states have internal predecessors, (100980), 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 05:18:38,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55647 states to 55647 states and 100980 transitions. [2021-11-03 05:18:38,871 INFO L78 Accepts]: Start accepts. Automaton has 55647 states and 100980 transitions. Word has length 75 [2021-11-03 05:18:38,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:38,871 INFO L470 AbstractCegarLoop]: Abstraction has 55647 states and 100980 transitions. [2021-11-03 05:18:38,871 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 05:18:38,871 INFO L276 IsEmpty]: Start isEmpty. Operand 55647 states and 100980 transitions. [2021-11-03 05:18:38,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-03 05:18:38,873 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:38,873 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] [2021-11-03 05:18:38,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:39,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:39,074 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 05:18:39,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:39,075 INFO L85 PathProgramCache]: Analyzing trace with hash 588003212, now seen corresponding path program 1 times [2021-11-03 05:18:39,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:39,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956851221] [2021-11-03 05:18:39,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:39,075 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:39,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:39,076 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:39,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 05:18:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:39,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:18:39,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:39,892 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 05:18:39,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:40,134 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 05:18:40,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:40,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956851221] [2021-11-03 05:18:40,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956851221] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:40,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:40,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:18:40,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179209305] [2021-11-03 05:18:40,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:18:40,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:40,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:18:40,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:18:40,136 INFO L87 Difference]: Start difference. First operand 55647 states and 100980 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 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 05:18:50,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:50,196 INFO L93 Difference]: Finished difference Result 249002 states and 455041 transitions. [2021-11-03 05:18:50,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:18:50,197 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 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 77 [2021-11-03 05:18:50,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:50,540 INFO L225 Difference]: With dead ends: 249002 [2021-11-03 05:18:50,541 INFO L226 Difference]: Without dead ends: 210523 [2021-11-03 05:18:50,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:18:50,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210523 states. [2021-11-03 05:18:54,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210523 to 82740. [2021-11-03 05:18:54,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82740 states, 82735 states have (on average 1.8228198464978547) internal successors, (150811), 82739 states have internal predecessors, (150811), 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 05:18:54,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82740 states to 82740 states and 150811 transitions. [2021-11-03 05:18:54,978 INFO L78 Accepts]: Start accepts. Automaton has 82740 states and 150811 transitions. Word has length 77 [2021-11-03 05:18:54,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:54,979 INFO L470 AbstractCegarLoop]: Abstraction has 82740 states and 150811 transitions. [2021-11-03 05:18:54,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 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 05:18:54,979 INFO L276 IsEmpty]: Start isEmpty. Operand 82740 states and 150811 transitions. [2021-11-03 05:18:54,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-03 05:18:54,981 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:54,982 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, 1] [2021-11-03 05:18:54,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:55,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:55,186 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 05:18:55,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:55,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1803834441, now seen corresponding path program 1 times [2021-11-03 05:18:55,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:55,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515158521] [2021-11-03 05:18:55,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:55,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:55,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:55,189 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:55,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0abaaf7a-1b69-45a1-b0d4-e3453c0c4bd9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:18:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:55,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:18:55,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:55,976 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 05:18:55,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:56,137 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 05:18:56,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:56,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515158521] [2021-11-03 05:18:56,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [515158521] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:56,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:56,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:18:56,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756365911] [2021-11-03 05:18:56,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:18:56,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:56,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:18:56,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:18:56,139 INFO L87 Difference]: Start difference. First operand 82740 states and 150811 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 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)