./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8 --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 4246354e79d66df81a26382f92e3cfb9fdaf25fcf22b56dfc59f3e4dbd0d435a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:12:56,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:12:56,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:12:56,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:12:56,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:12:56,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:12:56,227 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:12:56,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:12:56,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:12:56,234 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:12:56,236 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:12:56,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:12:56,239 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:12:56,241 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:12:56,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:12:56,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:12:56,247 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:12:56,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:12:56,252 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:12:56,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:12:56,258 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:12:56,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:12:56,262 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:12:56,264 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:12:56,269 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:12:56,269 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:12:56,270 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:12:56,272 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:12:56,272 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:12:56,274 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:12:56,275 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:12:56,276 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:12:56,278 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:12:56,279 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:12:56,281 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:12:56,281 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:12:56,282 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:12:56,282 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:12:56,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:12:56,283 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:12:56,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:12:56,285 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:12:56,329 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:12:56,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:12:56,331 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:12:56,331 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:12:56,332 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:12:56,332 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:12:56,332 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:12:56,333 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:12:56,333 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:12:56,333 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:12:56,333 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:12:56,334 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:12:56,334 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:12:56,334 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:12:56,335 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:12:56,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:12:56,336 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:12:56,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:12:56,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:12:56,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:12:56,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:12:56,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:12:56,338 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:12:56,338 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:12:56,339 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:12:56,339 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:12:56,339 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:12:56,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:12:56,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:12:56,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:12:56,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:12:56,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:12:56,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:12:56,342 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:12:56,342 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:12:56,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:12:56,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:12:56,343 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:12:56,343 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:12:56,343 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_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4246354e79d66df81a26382f92e3cfb9fdaf25fcf22b56dfc59f3e4dbd0d435a [2021-11-07 02:12:56,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:12:56,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:12:56,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:12:56,750 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:12:56,752 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:12:56,753 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c [2021-11-07 02:12:56,837 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/data/916bbca26/8d9bfdd64c324bd8b09d9ce24dbf019b/FLAG3111fe15c [2021-11-07 02:12:57,633 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:12:57,640 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c [2021-11-07 02:12:57,685 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/data/916bbca26/8d9bfdd64c324bd8b09d9ce24dbf019b/FLAG3111fe15c [2021-11-07 02:12:57,719 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/data/916bbca26/8d9bfdd64c324bd8b09d9ce24dbf019b [2021-11-07 02:12:57,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:12:57,726 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:12:57,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:12:57,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:12:57,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:12:57,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:12:57" (1/1) ... [2021-11-07 02:12:57,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d520dc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:57, skipping insertion in model container [2021-11-07 02:12:57,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:12:57" (1/1) ... [2021-11-07 02:12:57,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:12:57,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:12:58,446 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_d495e314-0317-46d0-833e-09a01904dd7a/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c[35981,35994] [2021-11-07 02:12:58,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:12:58,640 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) [2021-11-07 02:12:58,641 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@373bb846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:58, skipping insertion in model container [2021-11-07 02:12:58,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:12:58,642 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:12:58,646 INFO L168 Benchmark]: Toolchain (without parser) took 917.68 ms. Allocated memory was 88.1 MB in the beginning and 121.6 MB in the end (delta: 33.6 MB). Free memory was 49.3 MB in the beginning and 82.7 MB in the end (delta: -33.4 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:12:58,647 INFO L168 Benchmark]: CDTParser took 1.23 ms. Allocated memory is still 88.1 MB. Free memory was 68.4 MB in the beginning and 68.3 MB in the end (delta: 41.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:12:58,650 INFO L168 Benchmark]: CACSL2BoogieTranslator took 913.01 ms. Allocated memory was 88.1 MB in the beginning and 121.6 MB in the end (delta: 33.6 MB). Free memory was 49.1 MB in the beginning and 82.7 MB in the end (delta: -33.6 MB). Peak memory consumption was 4.5 MB. Max. memory is 16.1 GB. [2021-11-07 02:12:58,653 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.23 ms. Allocated memory is still 88.1 MB. Free memory was 68.4 MB in the beginning and 68.3 MB in the end (delta: 41.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 913.01 ms. Allocated memory was 88.1 MB in the beginning and 121.6 MB in the end (delta: 33.6 MB). Free memory was 49.1 MB in the beginning and 82.7 MB in the end (delta: -33.6 MB). Peak memory consumption was 4.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2888]: 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_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8 --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 4246354e79d66df81a26382f92e3cfb9fdaf25fcf22b56dfc59f3e4dbd0d435a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:13:01,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:13:01,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:13:01,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:13:01,647 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:13:01,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:13:01,652 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:13:01,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:13:01,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:13:01,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:13:01,673 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:13:01,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:13:01,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:13:01,688 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:13:01,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:13:01,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:13:01,698 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:13:01,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:13:01,710 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:13:01,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:13:01,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:13:01,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:13:01,727 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:13:01,729 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:13:01,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:13:01,737 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:13:01,738 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:13:01,740 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:13:01,741 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:13:01,743 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:13:01,744 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:13:01,745 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:13:01,748 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:13:01,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:13:01,751 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:13:01,752 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:13:01,753 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:13:01,753 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:13:01,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:13:01,756 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:13:01,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:13:01,764 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:13:01,827 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:13:01,827 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:13:01,829 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:13:01,829 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:13:01,830 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:13:01,830 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:13:01,830 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:13:01,831 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:13:01,831 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:13:01,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:13:01,835 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:13:01,835 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:13:01,835 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:13:01,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:13:01,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:13:01,836 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:13:01,836 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:13:01,837 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:13:01,837 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:13:01,838 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:13:01,838 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:13:01,839 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:13:01,839 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:13:01,839 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:13:01,840 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:13:01,840 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:13:01,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:13:01,841 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:13:01,841 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:13:01,841 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:13:01,841 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:13:01,842 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:13:01,842 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:13:01,842 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:13:01,843 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:13:01,843 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_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4246354e79d66df81a26382f92e3cfb9fdaf25fcf22b56dfc59f3e4dbd0d435a [2021-11-07 02:13:02,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:13:02,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:13:02,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:13:02,409 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:13:02,409 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:13:02,411 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c [2021-11-07 02:13:02,491 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/data/f780bd5fb/fee0ffe20c21498485f148be0a994295/FLAGe857edce3 [2021-11-07 02:13:03,288 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:13:03,289 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c [2021-11-07 02:13:03,313 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/data/f780bd5fb/fee0ffe20c21498485f148be0a994295/FLAGe857edce3 [2021-11-07 02:13:03,418 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/data/f780bd5fb/fee0ffe20c21498485f148be0a994295 [2021-11-07 02:13:03,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:13:03,428 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:13:03,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:13:03,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:13:03,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:13:03,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:13:03" (1/1) ... [2021-11-07 02:13:03,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@649ba1e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:03, skipping insertion in model container [2021-11-07 02:13:03,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:13:03" (1/1) ... [2021-11-07 02:13:03,450 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:13:03,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:13:04,191 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_d495e314-0317-46d0-833e-09a01904dd7a/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c[35981,35994] [2021-11-07 02:13:04,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:13:04,395 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:13:04,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:13:04,571 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_d495e314-0317-46d0-833e-09a01904dd7a/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c[35981,35994] [2021-11-07 02:13:04,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:13:04,677 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:13:04,773 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_d495e314-0317-46d0-833e-09a01904dd7a/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c[35981,35994] [2021-11-07 02:13:04,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:13:04,887 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:13:04,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:04 WrapperNode [2021-11-07 02:13:04,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:13:04,889 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:13:04,889 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:13:04,890 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:13:04,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:04" (1/1) ... [2021-11-07 02:13:04,942 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:04" (1/1) ... [2021-11-07 02:13:05,335 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:13:05,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:13:05,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:13:05,337 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:13:05,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:04" (1/1) ... [2021-11-07 02:13:05,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:04" (1/1) ... [2021-11-07 02:13:05,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:04" (1/1) ... [2021-11-07 02:13:05,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:04" (1/1) ... [2021-11-07 02:13:05,665 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:04" (1/1) ... [2021-11-07 02:13:05,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:04" (1/1) ... [2021-11-07 02:13:05,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:04" (1/1) ... [2021-11-07 02:13:06,010 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:13:06,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:13:06,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:13:06,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:13:06,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:04" (1/1) ... [2021-11-07 02:13:06,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:13:06,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:13:06,060 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:13:06,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:13:06,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:13:06,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:13:06,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:13:06,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:13:23,020 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:13:23,020 INFO L299 CfgBuilder]: Removed 1245 assume(true) statements. [2021-11-07 02:13:23,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:13:23 BoogieIcfgContainer [2021-11-07 02:13:23,029 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:13:23,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:13:23,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:13:23,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:13:23,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:13:03" (1/3) ... [2021-11-07 02:13:23,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c217b48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:13:23, skipping insertion in model container [2021-11-07 02:13:23,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:04" (2/3) ... [2021-11-07 02:13:23,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c217b48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:13:23, skipping insertion in model container [2021-11-07 02:13:23,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:13:23" (3/3) ... [2021-11-07 02:13:23,041 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product28.cil.c [2021-11-07 02:13:23,048 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:13:23,048 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 02:13:23,149 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:13:23,160 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 [2021-11-07 02:13:23,161 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 02:13:23,291 INFO L276 IsEmpty]: Start isEmpty. Operand has 5044 states, 5038 states have (on average 1.8858674077014688) internal successors, (9501), 5043 states have internal predecessors, (9501), 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) [2021-11-07 02:13:23,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 02:13:23,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:23,319 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] [2021-11-07 02:13:23,320 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)] === [2021-11-07 02:13:23,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:23,333 INFO L85 PathProgramCache]: Analyzing trace with hash -424075637, now seen corresponding path program 1 times [2021-11-07 02:13:23,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:23,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915856236] [2021-11-07 02:13:23,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:23,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:23,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:23,365 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:23,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:13:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:23,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:13:23,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:23,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:24,074 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:24,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915856236] [2021-11-07 02:13:24,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1915856236] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:24,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:24,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:13:24,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970295553] [2021-11-07 02:13:24,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:13:24,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:24,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:13:24,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:13:24,128 INFO L87 Difference]: Start difference. First operand has 5044 states, 5038 states have (on average 1.8858674077014688) internal successors, (9501), 5043 states have internal predecessors, (9501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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) [2021-11-07 02:13:24,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:24,348 INFO L93 Difference]: Finished difference Result 5063 states and 9524 transitions. [2021-11-07 02:13:24,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:13:24,350 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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 27 [2021-11-07 02:13:24,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:24,427 INFO L225 Difference]: With dead ends: 5063 [2021-11-07 02:13:24,427 INFO L226 Difference]: Without dead ends: 5040 [2021-11-07 02:13:24,437 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:13:24,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5040 states. [2021-11-07 02:13:24,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5040 to 5040. [2021-11-07 02:13:24,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5040 states, 5035 states have (on average 1.8846077457795432) internal successors, (9489), 5039 states have internal predecessors, (9489), 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) [2021-11-07 02:13:24,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5040 states to 5040 states and 9489 transitions. [2021-11-07 02:13:24,883 INFO L78 Accepts]: Start accepts. Automaton has 5040 states and 9489 transitions. Word has length 27 [2021-11-07 02:13:24,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:24,883 INFO L470 AbstractCegarLoop]: Abstraction has 5040 states and 9489 transitions. [2021-11-07 02:13:24,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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) [2021-11-07 02:13:24,884 INFO L276 IsEmpty]: Start isEmpty. Operand 5040 states and 9489 transitions. [2021-11-07 02:13:24,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 02:13:24,888 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:24,888 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] [2021-11-07 02:13:24,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:25,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:25,105 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)] === [2021-11-07 02:13:25,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:25,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1910901455, now seen corresponding path program 1 times [2021-11-07 02:13:25,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:25,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580630739] [2021-11-07 02:13:25,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:25,109 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:25,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:25,111 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:25,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:13:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:25,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:13:25,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:25,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:25,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:25,805 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:25,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580630739] [2021-11-07 02:13:25,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580630739] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:25,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:25,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:13:25,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953437090] [2021-11-07 02:13:25,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:13:25,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:25,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:13:25,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:13:25,816 INFO L87 Difference]: Start difference. First operand 5040 states and 9489 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2021-11-07 02:13:26,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:26,157 INFO L93 Difference]: Finished difference Result 10067 states and 18959 transitions. [2021-11-07 02:13:26,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:13:26,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 29 [2021-11-07 02:13:26,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:26,201 INFO L225 Difference]: With dead ends: 10067 [2021-11-07 02:13:26,202 INFO L226 Difference]: Without dead ends: 5040 [2021-11-07 02:13:26,220 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:13:26,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5040 states. [2021-11-07 02:13:26,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5040 to 5040. [2021-11-07 02:13:26,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5040 states, 5035 states have (on average 1.883416087388282) internal successors, (9483), 5039 states have internal predecessors, (9483), 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) [2021-11-07 02:13:26,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5040 states to 5040 states and 9483 transitions. [2021-11-07 02:13:26,455 INFO L78 Accepts]: Start accepts. Automaton has 5040 states and 9483 transitions. Word has length 29 [2021-11-07 02:13:26,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:26,456 INFO L470 AbstractCegarLoop]: Abstraction has 5040 states and 9483 transitions. [2021-11-07 02:13:26,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2021-11-07 02:13:26,458 INFO L276 IsEmpty]: Start isEmpty. Operand 5040 states and 9483 transitions. [2021-11-07 02:13:26,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 02:13:26,465 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:26,473 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:13:26,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:26,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:26,700 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)] === [2021-11-07 02:13:26,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:26,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1792455045, now seen corresponding path program 1 times [2021-11-07 02:13:26,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:26,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654403549] [2021-11-07 02:13:26,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:26,702 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:26,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:26,706 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:26,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:13:27,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:27,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:13:27,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:27,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:27,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:27,412 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:27,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654403549] [2021-11-07 02:13:27,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654403549] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:27,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:27,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:13:27,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262877729] [2021-11-07 02:13:27,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:13:27,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:27,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:13:27,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:13:27,416 INFO L87 Difference]: Start difference. First operand 5040 states and 9483 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 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) [2021-11-07 02:13:28,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:28,062 INFO L93 Difference]: Finished difference Result 10031 states and 18882 transitions. [2021-11-07 02:13:28,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:13:28,064 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-07 02:13:28,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:28,106 INFO L225 Difference]: With dead ends: 10031 [2021-11-07 02:13:28,107 INFO L226 Difference]: Without dead ends: 5013 [2021-11-07 02:13:28,117 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:13:28,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5013 states. [2021-11-07 02:13:28,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5013 to 5013. [2021-11-07 02:13:28,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5013 states, 5008 states have (on average 1.882388178913738) internal successors, (9427), 5012 states have internal predecessors, (9427), 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) [2021-11-07 02:13:28,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5013 states to 5013 states and 9427 transitions. [2021-11-07 02:13:28,429 INFO L78 Accepts]: Start accepts. Automaton has 5013 states and 9427 transitions. Word has length 34 [2021-11-07 02:13:28,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:28,430 INFO L470 AbstractCegarLoop]: Abstraction has 5013 states and 9427 transitions. [2021-11-07 02:13:28,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 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) [2021-11-07 02:13:28,434 INFO L276 IsEmpty]: Start isEmpty. Operand 5013 states and 9427 transitions. [2021-11-07 02:13:28,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 02:13:28,436 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:28,437 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] [2021-11-07 02:13:28,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:28,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:28,653 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)] === [2021-11-07 02:13:28,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:28,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1461689437, now seen corresponding path program 1 times [2021-11-07 02:13:28,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:28,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356386630] [2021-11-07 02:13:28,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:28,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:28,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:28,658 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:28,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:13:29,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:29,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:13:29,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:29,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:29,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:29,407 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:29,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356386630] [2021-11-07 02:13:29,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356386630] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:29,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:29,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:13:29,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209631310] [2021-11-07 02:13:29,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:13:29,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:29,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:13:29,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:13:29,411 INFO L87 Difference]: Start difference. First operand 5013 states and 9427 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2021-11-07 02:13:29,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:29,745 INFO L93 Difference]: Finished difference Result 10004 states and 18826 transitions. [2021-11-07 02:13:29,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:13:29,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 35 [2021-11-07 02:13:29,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:29,786 INFO L225 Difference]: With dead ends: 10004 [2021-11-07 02:13:29,786 INFO L226 Difference]: Without dead ends: 5013 [2021-11-07 02:13:29,878 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:13:29,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5013 states. [2021-11-07 02:13:30,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5013 to 5013. [2021-11-07 02:13:30,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5013 states, 5008 states have (on average 1.8811900958466454) internal successors, (9421), 5012 states have internal predecessors, (9421), 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) [2021-11-07 02:13:30,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5013 states to 5013 states and 9421 transitions. [2021-11-07 02:13:30,121 INFO L78 Accepts]: Start accepts. Automaton has 5013 states and 9421 transitions. Word has length 35 [2021-11-07 02:13:30,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:30,122 INFO L470 AbstractCegarLoop]: Abstraction has 5013 states and 9421 transitions. [2021-11-07 02:13:30,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2021-11-07 02:13:30,123 INFO L276 IsEmpty]: Start isEmpty. Operand 5013 states and 9421 transitions. [2021-11-07 02:13:30,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 02:13:30,126 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:30,126 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:13:30,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:30,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:30,344 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)] === [2021-11-07 02:13:30,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:30,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1646874510, now seen corresponding path program 1 times [2021-11-07 02:13:30,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:30,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334328097] [2021-11-07 02:13:30,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:30,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:30,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:30,348 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:30,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:13:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:30,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:13:30,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:31,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:31,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:31,179 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:31,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334328097] [2021-11-07 02:13:31,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334328097] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:31,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:31,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:13:31,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052346117] [2021-11-07 02:13:31,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:13:31,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:31,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:13:31,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:13:31,182 INFO L87 Difference]: Start difference. First operand 5013 states and 9421 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 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) [2021-11-07 02:13:31,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:31,700 INFO L93 Difference]: Finished difference Result 9998 states and 18809 transitions. [2021-11-07 02:13:31,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:13:31,701 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 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 40 [2021-11-07 02:13:31,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:31,737 INFO L225 Difference]: With dead ends: 9998 [2021-11-07 02:13:31,738 INFO L226 Difference]: Without dead ends: 5010 [2021-11-07 02:13:31,747 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:13:31,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5010 states. [2021-11-07 02:13:31,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5010 to 5010. [2021-11-07 02:13:31,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5010 states, 5005 states have (on average 1.8807192807192807) internal successors, (9413), 5009 states have internal predecessors, (9413), 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) [2021-11-07 02:13:31,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5010 states to 5010 states and 9413 transitions. [2021-11-07 02:13:31,985 INFO L78 Accepts]: Start accepts. Automaton has 5010 states and 9413 transitions. Word has length 40 [2021-11-07 02:13:31,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:31,985 INFO L470 AbstractCegarLoop]: Abstraction has 5010 states and 9413 transitions. [2021-11-07 02:13:31,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 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) [2021-11-07 02:13:31,986 INFO L276 IsEmpty]: Start isEmpty. Operand 5010 states and 9413 transitions. [2021-11-07 02:13:31,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 02:13:31,987 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:31,987 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] [2021-11-07 02:13:32,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:32,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:32,205 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)] === [2021-11-07 02:13:32,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:32,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1034170530, now seen corresponding path program 1 times [2021-11-07 02:13:32,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:32,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [708889365] [2021-11-07 02:13:32,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:32,207 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:32,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:32,208 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:32,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:13:32,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:32,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:13:32,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:33,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:33,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:33,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:33,235 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:33,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [708889365] [2021-11-07 02:13:33,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [708889365] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:33,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:33,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:13:33,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731867723] [2021-11-07 02:13:33,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:13:33,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:33,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:13:33,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:13:33,238 INFO L87 Difference]: Start difference. First operand 5010 states and 9413 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 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) [2021-11-07 02:13:34,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:34,057 INFO L93 Difference]: Finished difference Result 13664 states and 25750 transitions. [2021-11-07 02:13:34,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:13:34,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 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 41 [2021-11-07 02:13:34,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:34,124 INFO L225 Difference]: With dead ends: 13664 [2021-11-07 02:13:34,124 INFO L226 Difference]: Without dead ends: 11117 [2021-11-07 02:13:34,133 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:13:34,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11117 states. [2021-11-07 02:13:34,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11117 to 6616. [2021-11-07 02:13:34,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6616 states, 6611 states have (on average 1.882619875964302) internal successors, (12446), 6615 states have internal predecessors, (12446), 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) [2021-11-07 02:13:34,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6616 states to 6616 states and 12446 transitions. [2021-11-07 02:13:34,530 INFO L78 Accepts]: Start accepts. Automaton has 6616 states and 12446 transitions. Word has length 41 [2021-11-07 02:13:34,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:34,531 INFO L470 AbstractCegarLoop]: Abstraction has 6616 states and 12446 transitions. [2021-11-07 02:13:34,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 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) [2021-11-07 02:13:34,531 INFO L276 IsEmpty]: Start isEmpty. Operand 6616 states and 12446 transitions. [2021-11-07 02:13:34,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:13:34,537 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:34,537 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:13:34,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:34,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:34,764 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)] === [2021-11-07 02:13:34,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:34,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1794145083, now seen corresponding path program 1 times [2021-11-07 02:13:34,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:34,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967792004] [2021-11-07 02:13:34,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:34,766 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:34,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:34,768 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:34,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:13:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:35,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:13:35,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:35,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:35,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:35,962 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:35,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967792004] [2021-11-07 02:13:35,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967792004] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:35,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:35,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 02:13:35,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552293752] [2021-11-07 02:13:35,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:13:35,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:35,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:13:35,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:13:35,964 INFO L87 Difference]: Start difference. First operand 6616 states and 12446 transitions. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 states have internal predecessors, (88), 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) [2021-11-07 02:13:36,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:36,977 INFO L93 Difference]: Finished difference Result 12592 states and 23478 transitions. [2021-11-07 02:13:36,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:13:36,978 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 02:13:36,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:37,004 INFO L225 Difference]: With dead ends: 12592 [2021-11-07 02:13:37,004 INFO L226 Difference]: Without dead ends: 7221 [2021-11-07 02:13:37,016 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:13:37,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7221 states. [2021-11-07 02:13:37,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7221 to 4905. [2021-11-07 02:13:37,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4905 states, 4900 states have (on average 1.8751020408163266) internal successors, (9188), 4904 states have internal predecessors, (9188), 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) [2021-11-07 02:13:37,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4905 states to 4905 states and 9188 transitions. [2021-11-07 02:13:37,309 INFO L78 Accepts]: Start accepts. Automaton has 4905 states and 9188 transitions. Word has length 60 [2021-11-07 02:13:37,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:37,310 INFO L470 AbstractCegarLoop]: Abstraction has 4905 states and 9188 transitions. [2021-11-07 02:13:37,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 states have internal predecessors, (88), 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) [2021-11-07 02:13:37,311 INFO L276 IsEmpty]: Start isEmpty. Operand 4905 states and 9188 transitions. [2021-11-07 02:13:37,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 02:13:37,314 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:37,314 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] [2021-11-07 02:13:37,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 02:13:37,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:37,532 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)] === [2021-11-07 02:13:37,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:37,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1044394081, now seen corresponding path program 1 times [2021-11-07 02:13:37,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:37,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51236269] [2021-11-07 02:13:37,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:37,534 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:37,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:37,540 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:37,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:13:38,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:38,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:13:38,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:38,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:38,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:38,753 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:38,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51236269] [2021-11-07 02:13:38,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51236269] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:38,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:38,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 02:13:38,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330704145] [2021-11-07 02:13:38,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:13:38,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:38,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:13:38,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:13:38,756 INFO L87 Difference]: Start difference. First operand 4905 states and 9188 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-11-07 02:13:41,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:41,780 INFO L93 Difference]: Finished difference Result 18249 states and 34244 transitions. [2021-11-07 02:13:41,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:13:41,781 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 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 61 [2021-11-07 02:13:41,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:41,833 INFO L225 Difference]: With dead ends: 18249 [2021-11-07 02:13:41,833 INFO L226 Difference]: Without dead ends: 13378 [2021-11-07 02:13:41,849 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:13:41,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13378 states. [2021-11-07 02:13:42,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13378 to 4905. [2021-11-07 02:13:42,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4905 states, 4900 states have (on average 1.8404081632653062) internal successors, (9018), 4904 states have internal predecessors, (9018), 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) [2021-11-07 02:13:42,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4905 states to 4905 states and 9018 transitions. [2021-11-07 02:13:42,327 INFO L78 Accepts]: Start accepts. Automaton has 4905 states and 9018 transitions. Word has length 61 [2021-11-07 02:13:42,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:42,328 INFO L470 AbstractCegarLoop]: Abstraction has 4905 states and 9018 transitions. [2021-11-07 02:13:42,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-11-07 02:13:42,329 INFO L276 IsEmpty]: Start isEmpty. Operand 4905 states and 9018 transitions. [2021-11-07 02:13:42,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 02:13:42,333 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:42,333 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] [2021-11-07 02:13:42,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:42,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:42,553 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)] === [2021-11-07 02:13:42,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:42,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1730476365, now seen corresponding path program 1 times [2021-11-07 02:13:42,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:42,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163864453] [2021-11-07 02:13:42,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:42,555 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:42,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:42,557 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:42,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:13:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:43,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:13:43,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:43,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:43,769 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:43,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163864453] [2021-11-07 02:13:43,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163864453] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:43,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:43,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:13:43,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109761158] [2021-11-07 02:13:43,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:13:43,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:43,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:13:43,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:13:43,772 INFO L87 Difference]: Start difference. First operand 4905 states and 9018 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:45,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:45,558 INFO L93 Difference]: Finished difference Result 13936 states and 25813 transitions. [2021-11-07 02:13:45,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:13:45,559 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 02:13:45,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:45,590 INFO L225 Difference]: With dead ends: 13936 [2021-11-07 02:13:45,590 INFO L226 Difference]: Without dead ends: 9083 [2021-11-07 02:13:45,598 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:13:45,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9083 states. [2021-11-07 02:13:45,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9083 to 4837. [2021-11-07 02:13:45,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4837 states, 4832 states have (on average 1.8406456953642385) internal successors, (8894), 4836 states have internal predecessors, (8894), 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) [2021-11-07 02:13:45,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4837 states to 4837 states and 8894 transitions. [2021-11-07 02:13:45,929 INFO L78 Accepts]: Start accepts. Automaton has 4837 states and 8894 transitions. Word has length 69 [2021-11-07 02:13:45,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:45,929 INFO L470 AbstractCegarLoop]: Abstraction has 4837 states and 8894 transitions. [2021-11-07 02:13:45,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:45,930 INFO L276 IsEmpty]: Start isEmpty. Operand 4837 states and 8894 transitions. [2021-11-07 02:13:45,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:13:45,933 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:45,933 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] [2021-11-07 02:13:45,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-07 02:13:46,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:46,153 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)] === [2021-11-07 02:13:46,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:46,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1890046189, now seen corresponding path program 1 times [2021-11-07 02:13:46,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:46,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213180380] [2021-11-07 02:13:46,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:46,156 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:46,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:46,157 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:46,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:13:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:46,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:13:46,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:47,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:47,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:47,309 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:47,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213180380] [2021-11-07 02:13:47,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213180380] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:47,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:47,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:13:47,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534661417] [2021-11-07 02:13:47,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:13:47,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:47,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:13:47,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:13:47,312 INFO L87 Difference]: Start difference. First operand 4837 states and 8894 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 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) [2021-11-07 02:13:49,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:49,973 INFO L93 Difference]: Finished difference Result 19210 states and 35486 transitions. [2021-11-07 02:13:49,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:13:49,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 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 [2021-11-07 02:13:49,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:50,027 INFO L225 Difference]: With dead ends: 19210 [2021-11-07 02:13:50,027 INFO L226 Difference]: Without dead ends: 14424 [2021-11-07 02:13:50,039 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:13:50,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14424 states. [2021-11-07 02:13:50,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14424 to 4845. [2021-11-07 02:13:50,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4845 states, 4840 states have (on average 1.8392561983471074) internal successors, (8902), 4844 states have internal predecessors, (8902), 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) [2021-11-07 02:13:50,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4845 states to 4845 states and 8902 transitions. [2021-11-07 02:13:50,641 INFO L78 Accepts]: Start accepts. Automaton has 4845 states and 8902 transitions. Word has length 71 [2021-11-07 02:13:50,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:50,642 INFO L470 AbstractCegarLoop]: Abstraction has 4845 states and 8902 transitions. [2021-11-07 02:13:50,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 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) [2021-11-07 02:13:50,642 INFO L276 IsEmpty]: Start isEmpty. Operand 4845 states and 8902 transitions. [2021-11-07 02:13:50,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:13:50,646 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:50,646 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:13:50,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:50,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:50,869 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)] === [2021-11-07 02:13:50,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:50,870 INFO L85 PathProgramCache]: Analyzing trace with hash 792871044, now seen corresponding path program 1 times [2021-11-07 02:13:50,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:50,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668643663] [2021-11-07 02:13:50,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:50,871 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:50,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:50,872 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:50,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:13:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:51,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:13:51,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:51,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:51,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:52,029 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:52,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668643663] [2021-11-07 02:13:52,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668643663] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:52,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:52,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:13:52,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74322466] [2021-11-07 02:13:52,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:13:52,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:52,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:13:52,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:13:52,032 INFO L87 Difference]: Start difference. First operand 4845 states and 8902 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:54,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:54,542 INFO L93 Difference]: Finished difference Result 13857 states and 25562 transitions. [2021-11-07 02:13:54,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:13:54,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 02:13:54,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:54,568 INFO L225 Difference]: With dead ends: 13857 [2021-11-07 02:13:54,568 INFO L226 Difference]: Without dead ends: 9050 [2021-11-07 02:13:54,575 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:13:54,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9050 states. [2021-11-07 02:13:55,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9050 to 6214. [2021-11-07 02:13:55,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6214 states, 6209 states have (on average 1.8247704944435497) internal successors, (11330), 6213 states have internal predecessors, (11330), 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) [2021-11-07 02:13:55,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6214 states to 6214 states and 11330 transitions. [2021-11-07 02:13:55,043 INFO L78 Accepts]: Start accepts. Automaton has 6214 states and 11330 transitions. Word has length 72 [2021-11-07 02:13:55,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:55,046 INFO L470 AbstractCegarLoop]: Abstraction has 6214 states and 11330 transitions. [2021-11-07 02:13:55,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:55,046 INFO L276 IsEmpty]: Start isEmpty. Operand 6214 states and 11330 transitions. [2021-11-07 02:13:55,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:13:55,053 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:55,054 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:13:55,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:55,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:55,276 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)] === [2021-11-07 02:13:55,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:55,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1620010700, now seen corresponding path program 1 times [2021-11-07 02:13:55,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:55,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025972104] [2021-11-07 02:13:55,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:55,278 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:55,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:55,279 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:55,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:13:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:55,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:13:55,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:56,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:56,437 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:56,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025972104] [2021-11-07 02:13:56,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025972104] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:56,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:56,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:13:56,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459763822] [2021-11-07 02:13:56,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:13:56,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:56,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:13:56,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:13:56,440 INFO L87 Difference]: Start difference. First operand 6214 states and 11330 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 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) [2021-11-07 02:13:58,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:58,908 INFO L93 Difference]: Finished difference Result 46777 states and 85612 transitions. [2021-11-07 02:13:58,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:13:58,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 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 74 [2021-11-07 02:13:58,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:59,017 INFO L225 Difference]: With dead ends: 46777 [2021-11-07 02:13:59,018 INFO L226 Difference]: Without dead ends: 40610 [2021-11-07 02:13:59,034 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:13:59,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40610 states. [2021-11-07 02:14:00,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40610 to 11441. [2021-11-07 02:14:00,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11441 states, 11436 states have (on average 1.830097936341378) internal successors, (20929), 11440 states have internal predecessors, (20929), 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) [2021-11-07 02:14:00,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11441 states to 11441 states and 20929 transitions. [2021-11-07 02:14:00,071 INFO L78 Accepts]: Start accepts. Automaton has 11441 states and 20929 transitions. Word has length 74 [2021-11-07 02:14:00,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:00,072 INFO L470 AbstractCegarLoop]: Abstraction has 11441 states and 20929 transitions. [2021-11-07 02:14:00,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 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) [2021-11-07 02:14:00,073 INFO L276 IsEmpty]: Start isEmpty. Operand 11441 states and 20929 transitions. [2021-11-07 02:14:00,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:14:00,076 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:00,076 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] [2021-11-07 02:14:00,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:00,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:00,296 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)] === [2021-11-07 02:14:00,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:00,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1894770314, now seen corresponding path program 1 times [2021-11-07 02:14:00,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:00,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395950572] [2021-11-07 02:14:00,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:00,298 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:00,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:00,299 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:00,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:14:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:01,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:14:01,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:01,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:01,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:01,706 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:01,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395950572] [2021-11-07 02:14:01,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395950572] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:01,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:01,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:14:01,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037506974] [2021-11-07 02:14:01,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:14:01,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:01,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:14:01,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:14:01,709 INFO L87 Difference]: Start difference. First operand 11441 states and 20929 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 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) [2021-11-07 02:14:03,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:03,507 INFO L93 Difference]: Finished difference Result 24150 states and 44207 transitions. [2021-11-07 02:14:03,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:14:03,508 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 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 74 [2021-11-07 02:14:03,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:03,542 INFO L225 Difference]: With dead ends: 24150 [2021-11-07 02:14:03,543 INFO L226 Difference]: Without dead ends: 17400 [2021-11-07 02:14:03,556 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:14:03,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17400 states. [2021-11-07 02:14:04,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17400 to 11425. [2021-11-07 02:14:04,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11425 states, 11420 states have (on average 1.8298598949211908) internal successors, (20897), 11424 states have internal predecessors, (20897), 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) [2021-11-07 02:14:04,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11425 states to 11425 states and 20897 transitions. [2021-11-07 02:14:04,404 INFO L78 Accepts]: Start accepts. Automaton has 11425 states and 20897 transitions. Word has length 74 [2021-11-07 02:14:04,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:04,405 INFO L470 AbstractCegarLoop]: Abstraction has 11425 states and 20897 transitions. [2021-11-07 02:14:04,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 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) [2021-11-07 02:14:04,405 INFO L276 IsEmpty]: Start isEmpty. Operand 11425 states and 20897 transitions. [2021-11-07 02:14:04,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:14:04,409 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:04,409 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] [2021-11-07 02:14:04,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:04,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:04,614 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:14:04,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:04,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1064271952, now seen corresponding path program 1 times [2021-11-07 02:14:04,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:04,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526635188] [2021-11-07 02:14:04,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:04,616 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:04,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:04,618 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:04,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:14:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:05,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:14:05,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:05,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:05,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:05,941 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:05,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526635188] [2021-11-07 02:14:05,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [526635188] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:05,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:05,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:14:05,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230888408] [2021-11-07 02:14:05,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:14:05,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:05,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:14:05,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:14:05,945 INFO L87 Difference]: Start difference. First operand 11425 states and 20897 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 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) [2021-11-07 02:14:08,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:08,365 INFO L93 Difference]: Finished difference Result 45677 states and 84009 transitions. [2021-11-07 02:14:08,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:14:08,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 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 76 [2021-11-07 02:14:08,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:08,430 INFO L225 Difference]: With dead ends: 45677 [2021-11-07 02:14:08,430 INFO L226 Difference]: Without dead ends: 38939 [2021-11-07 02:14:08,450 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:14:08,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38939 states. [2021-11-07 02:14:09,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38939 to 17614. [2021-11-07 02:14:09,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17614 states, 17609 states have (on average 1.82866715883923) internal successors, (32201), 17613 states have internal predecessors, (32201), 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) [2021-11-07 02:14:09,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17614 states to 17614 states and 32201 transitions. [2021-11-07 02:14:09,821 INFO L78 Accepts]: Start accepts. Automaton has 17614 states and 32201 transitions. Word has length 76 [2021-11-07 02:14:09,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:09,822 INFO L470 AbstractCegarLoop]: Abstraction has 17614 states and 32201 transitions. [2021-11-07 02:14:09,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 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) [2021-11-07 02:14:09,822 INFO L276 IsEmpty]: Start isEmpty. Operand 17614 states and 32201 transitions. [2021-11-07 02:14:09,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 02:14:09,826 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:09,827 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] [2021-11-07 02:14:09,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 02:14:10,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:10,028 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:14:10,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:10,029 INFO L85 PathProgramCache]: Analyzing trace with hash 203497508, now seen corresponding path program 1 times [2021-11-07 02:14:10,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:10,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13105667] [2021-11-07 02:14:10,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:10,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:10,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:10,032 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:10,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:14:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:10,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:14:10,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:11,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:11,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:11,500 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:11,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13105667] [2021-11-07 02:14:11,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13105667] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:11,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:11,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:14:11,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658928727] [2021-11-07 02:14:11,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:14:11,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:11,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:14:11,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:14:11,502 INFO L87 Difference]: Start difference. First operand 17614 states and 32201 transitions. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-11-07 02:14:19,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:19,522 INFO L93 Difference]: Finished difference Result 97579 states and 179519 transitions. [2021-11-07 02:14:19,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:14:19,522 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 5 states have internal predecessors, (135), 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 78 [2021-11-07 02:14:19,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:19,671 INFO L225 Difference]: With dead ends: 97579 [2021-11-07 02:14:19,671 INFO L226 Difference]: Without dead ends: 84652 [2021-11-07 02:14:19,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:14:19,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84652 states. [2021-11-07 02:14:22,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84652 to 28564. [2021-11-07 02:14:22,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28564 states, 28559 states have (on average 1.8365138835393395) internal successors, (52449), 28563 states have internal predecessors, (52449), 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) [2021-11-07 02:14:22,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28564 states to 28564 states and 52449 transitions. [2021-11-07 02:14:22,313 INFO L78 Accepts]: Start accepts. Automaton has 28564 states and 52449 transitions. Word has length 78 [2021-11-07 02:14:22,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:22,314 INFO L470 AbstractCegarLoop]: Abstraction has 28564 states and 52449 transitions. [2021-11-07 02:14:22,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-11-07 02:14:22,314 INFO L276 IsEmpty]: Start isEmpty. Operand 28564 states and 52449 transitions. [2021-11-07 02:14:22,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 02:14:22,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:22,318 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, 1] [2021-11-07 02:14:22,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:22,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:22,519 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:14:22,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:22,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1034283597, now seen corresponding path program 1 times [2021-11-07 02:14:22,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:22,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359082678] [2021-11-07 02:14:22,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:22,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:22,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:22,521 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:22,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:14:23,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:23,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:14:23,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:23,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:23,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:23,820 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:23,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359082678] [2021-11-07 02:14:23,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1359082678] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:23,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:23,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:14:23,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582412878] [2021-11-07 02:14:23,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:14:23,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:23,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:14:23,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:14:23,822 INFO L87 Difference]: Start difference. First operand 28564 states and 52449 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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) [2021-11-07 02:14:25,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:25,796 INFO L93 Difference]: Finished difference Result 52573 states and 96410 transitions. [2021-11-07 02:14:25,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:14:25,797 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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 85 [2021-11-07 02:14:25,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:25,841 INFO L225 Difference]: With dead ends: 52573 [2021-11-07 02:14:25,842 INFO L226 Difference]: Without dead ends: 28579 [2021-11-07 02:14:25,858 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:14:25,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28579 states. [2021-11-07 02:14:27,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28579 to 28564. [2021-11-07 02:14:27,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28564 states, 28559 states have (on average 1.8296508981406912) internal successors, (52253), 28563 states have internal predecessors, (52253), 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) [2021-11-07 02:14:28,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28564 states to 28564 states and 52253 transitions. [2021-11-07 02:14:28,042 INFO L78 Accepts]: Start accepts. Automaton has 28564 states and 52253 transitions. Word has length 85 [2021-11-07 02:14:28,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:28,043 INFO L470 AbstractCegarLoop]: Abstraction has 28564 states and 52253 transitions. [2021-11-07 02:14:28,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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) [2021-11-07 02:14:28,043 INFO L276 IsEmpty]: Start isEmpty. Operand 28564 states and 52253 transitions. [2021-11-07 02:14:28,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 02:14:28,046 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:28,046 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, 1, 1] [2021-11-07 02:14:28,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:28,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:28,247 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:14:28,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:28,248 INFO L85 PathProgramCache]: Analyzing trace with hash -937572823, now seen corresponding path program 1 times [2021-11-07 02:14:28,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:28,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [633940956] [2021-11-07 02:14:28,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:28,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:28,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:28,250 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:28,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:14:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:29,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:14:29,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:29,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:29,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:29,771 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:29,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [633940956] [2021-11-07 02:14:29,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [633940956] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:29,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:29,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:14:29,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223367072] [2021-11-07 02:14:29,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:14:29,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:29,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:14:29,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:14:29,774 INFO L87 Difference]: Start difference. First operand 28564 states and 52253 transitions. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-11-07 02:14:36,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:36,350 INFO L93 Difference]: Finished difference Result 83105 states and 151825 transitions. [2021-11-07 02:14:36,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:14:36,351 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 5 states have internal predecessors, (157), 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 86 [2021-11-07 02:14:36,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:36,450 INFO L225 Difference]: With dead ends: 83105 [2021-11-07 02:14:36,450 INFO L226 Difference]: Without dead ends: 59449 [2021-11-07 02:14:36,471 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:14:36,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59449 states. [2021-11-07 02:14:38,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59449 to 23780. [2021-11-07 02:14:38,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23780 states, 23775 states have (on average 1.8201051524710832) internal successors, (43273), 23779 states have internal predecessors, (43273), 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) [2021-11-07 02:14:38,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23780 states to 23780 states and 43273 transitions. [2021-11-07 02:14:38,599 INFO L78 Accepts]: Start accepts. Automaton has 23780 states and 43273 transitions. Word has length 86 [2021-11-07 02:14:38,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:38,599 INFO L470 AbstractCegarLoop]: Abstraction has 23780 states and 43273 transitions. [2021-11-07 02:14:38,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-11-07 02:14:38,600 INFO L276 IsEmpty]: Start isEmpty. Operand 23780 states and 43273 transitions. [2021-11-07 02:14:38,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 02:14:38,604 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:38,604 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, 1, 1] [2021-11-07 02:14:38,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:38,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:38,805 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:14:38,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:38,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1948690073, now seen corresponding path program 1 times [2021-11-07 02:14:38,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:38,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [49559031] [2021-11-07 02:14:38,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:38,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:38,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:38,810 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:38,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d495e314-0317-46d0-833e-09a01904dd7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:14:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:39,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:14:39,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:40,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:40,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:40,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:40,493 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:40,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [49559031] [2021-11-07 02:14:40,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [49559031] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:40,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:40,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 02:14:40,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735958586] [2021-11-07 02:14:40,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:14:40,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:40,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:14:40,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:14:40,496 INFO L87 Difference]: Start difference. First operand 23780 states and 43273 transitions. Second operand has 10 states, 10 states have (on average 16.3) internal successors, (163), 9 states have internal predecessors, (163), 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) [2021-11-07 02:15:01,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:01,708 INFO L93 Difference]: Finished difference Result 164655 states and 297669 transitions. [2021-11-07 02:15:01,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 02:15:01,709 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 16.3) internal successors, (163), 9 states have internal predecessors, (163), 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 86 [2021-11-07 02:15:01,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:02,167 INFO L225 Difference]: With dead ends: 164655 [2021-11-07 02:15:02,168 INFO L226 Difference]: Without dead ends: 142876 [2021-11-07 02:15:02,209 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 02:15:02,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142876 states.