./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec6_product29.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_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/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_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec6_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/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_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/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 3d972cfbd720871733ec5c68c499418657e5e73014fcfa137b0a1c37f3300ef7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:18:21,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:18:21,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:18:21,241 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:18:21,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:18:21,243 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:18:21,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:18:21,247 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:18:21,249 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:18:21,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:18:21,251 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:18:21,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:18:21,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:18:21,254 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:18:21,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:18:21,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:18:21,262 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:18:21,270 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:18:21,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:18:21,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:18:21,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:18:21,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:18:21,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:18:21,287 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:18:21,290 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:18:21,298 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:18:21,299 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:18:21,300 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:18:21,301 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:18:21,302 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:18:21,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:18:21,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:18:21,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:18:21,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:18:21,309 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:18:21,309 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:18:21,310 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:18:21,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:18:21,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:18:21,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:18:21,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:18:21,314 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:18:21,365 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:18:21,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:18:21,367 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:18:21,367 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:18:21,367 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:18:21,367 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:18:21,368 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:18:21,368 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:18:21,368 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:18:21,368 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:18:21,369 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:18:21,370 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:18:21,370 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:18:21,370 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:18:21,370 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:18:21,371 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:18:21,371 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:18:21,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:18:21,372 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:18:21,372 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:18:21,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:18:21,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:18:21,373 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:18:21,373 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:18:21,373 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:18:21,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:18:21,374 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:18:21,374 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:18:21,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:18:21,376 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:18:21,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:18:21,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:18:21,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:18:21,377 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:18:21,377 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:18:21,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:18:21,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:18:21,378 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:18:21,378 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:18:21,378 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_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d972cfbd720871733ec5c68c499418657e5e73014fcfa137b0a1c37f3300ef7 [2021-11-07 02:18:21,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:18:21,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:18:21,683 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:18:21,684 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:18:21,685 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:18:21,686 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec6_product29.cil.c [2021-11-07 02:18:21,749 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/data/f1e07f23a/87425ab9644442e1ab0289b8031eaaf5/FLAG793acbf46 [2021-11-07 02:18:22,303 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:18:22,303 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/sv-benchmarks/c/product-lines/email_spec6_product29.cil.c [2021-11-07 02:18:22,331 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/data/f1e07f23a/87425ab9644442e1ab0289b8031eaaf5/FLAG793acbf46 [2021-11-07 02:18:22,569 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/data/f1e07f23a/87425ab9644442e1ab0289b8031eaaf5 [2021-11-07 02:18:22,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:18:22,572 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:18:22,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:18:22,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:18:22,577 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:18:22,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:18:22" (1/1) ... [2021-11-07 02:18:22,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@400fa186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:22, skipping insertion in model container [2021-11-07 02:18:22,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:18:22" (1/1) ... [2021-11-07 02:18:22,586 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:18:22,654 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:18:23,157 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_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/sv-benchmarks/c/product-lines/email_spec6_product29.cil.c[42927,42940] [2021-11-07 02:18:23,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:18:23,347 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 02:18:23,348 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2478f0e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:23, skipping insertion in model container [2021-11-07 02:18:23,348 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:18:23,348 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:18:23,351 INFO L168 Benchmark]: Toolchain (without parser) took 776.81 ms. Allocated memory is still 121.6 MB. Free memory was 77.5 MB in the beginning and 80.1 MB in the end (delta: -2.6 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. [2021-11-07 02:18:23,352 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 121.6 MB. Free memory is still 96.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:18:23,354 INFO L168 Benchmark]: CACSL2BoogieTranslator took 774.29 ms. Allocated memory is still 121.6 MB. Free memory was 77.3 MB in the beginning and 80.1 MB in the end (delta: -2.8 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. [2021-11-07 02:18:23,356 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 121.6 MB. Free memory is still 96.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 774.29 ms. Allocated memory is still 121.6 MB. Free memory was 77.3 MB in the beginning and 80.1 MB in the end (delta: -2.8 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 397]: 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_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/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_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec6_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/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_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/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 3d972cfbd720871733ec5c68c499418657e5e73014fcfa137b0a1c37f3300ef7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:18:25,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:18:25,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:18:25,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:18:25,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:18:25,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:18:25,494 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:18:25,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:18:25,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:18:25,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:18:25,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:18:25,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:18:25,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:18:25,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:18:25,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:18:25,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:18:25,507 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:18:25,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:18:25,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:18:25,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:18:25,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:18:25,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:18:25,522 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:18:25,524 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:18:25,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:18:25,533 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:18:25,534 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:18:25,535 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:18:25,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:18:25,536 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:18:25,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:18:25,537 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:18:25,538 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:18:25,545 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:18:25,562 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:18:25,562 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:18:25,563 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:18:25,563 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:18:25,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:18:25,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:18:25,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:18:25,566 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:18:25,592 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:18:25,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:18:25,593 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:18:25,593 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:18:25,593 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:18:25,594 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:18:25,594 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:18:25,594 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:18:25,594 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:18:25,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:18:25,595 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:18:25,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:18:25,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:18:25,596 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:18:25,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:18:25,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:18:25,596 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:18:25,596 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:18:25,597 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:18:25,597 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:18:25,597 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:18:25,597 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:18:25,597 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:18:25,598 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:18:25,598 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:18:25,598 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:18:25,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:18:25,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:18:25,599 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:18:25,599 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:18:25,599 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:18:25,599 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:18:25,599 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:18:25,600 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:18:25,600 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:18:25,600 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_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d972cfbd720871733ec5c68c499418657e5e73014fcfa137b0a1c37f3300ef7 [2021-11-07 02:18:25,958 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:18:25,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:18:25,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:18:25,983 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:18:25,983 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:18:25,984 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec6_product29.cil.c [2021-11-07 02:18:26,051 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/data/9cd32acf9/d36c6dc5b91d4b08969b0b804aa86702/FLAGb542333d7 [2021-11-07 02:18:26,711 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:18:26,712 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/sv-benchmarks/c/product-lines/email_spec6_product29.cil.c [2021-11-07 02:18:26,740 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/data/9cd32acf9/d36c6dc5b91d4b08969b0b804aa86702/FLAGb542333d7 [2021-11-07 02:18:26,859 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/data/9cd32acf9/d36c6dc5b91d4b08969b0b804aa86702 [2021-11-07 02:18:26,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:18:26,866 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:18:26,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:18:26,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:18:26,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:18:26,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:18:26" (1/1) ... [2021-11-07 02:18:26,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fa1e8bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:26, skipping insertion in model container [2021-11-07 02:18:26,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:18:26" (1/1) ... [2021-11-07 02:18:26,891 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:18:26,956 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:18:27,370 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_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/sv-benchmarks/c/product-lines/email_spec6_product29.cil.c[42927,42940] [2021-11-07 02:18:27,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:18:27,561 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:18:27,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:18:27,715 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_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/sv-benchmarks/c/product-lines/email_spec6_product29.cil.c[42927,42940] [2021-11-07 02:18:27,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:18:27,759 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:18:27,808 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_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/sv-benchmarks/c/product-lines/email_spec6_product29.cil.c[42927,42940] [2021-11-07 02:18:27,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:18:27,911 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:18:27,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:27 WrapperNode [2021-11-07 02:18:27,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:18:27,913 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:18:27,913 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:18:27,913 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:18:27,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:27" (1/1) ... [2021-11-07 02:18:27,973 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:27" (1/1) ... [2021-11-07 02:18:28,163 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:18:28,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:18:28,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:18:28,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:18:28,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:27" (1/1) ... [2021-11-07 02:18:28,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:27" (1/1) ... [2021-11-07 02:18:28,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:27" (1/1) ... [2021-11-07 02:18:28,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:27" (1/1) ... [2021-11-07 02:18:28,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:27" (1/1) ... [2021-11-07 02:18:28,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:27" (1/1) ... [2021-11-07 02:18:28,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:27" (1/1) ... [2021-11-07 02:18:28,394 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:18:28,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:18:28,395 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:18:28,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:18:28,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:27" (1/1) ... [2021-11-07 02:18:28,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:18:28,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:18:28,436 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:18:28,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:18:28,479 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 02:18:28,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:18:28,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:18:28,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:18:28,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:18:34,254 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:18:34,263 INFO L299 CfgBuilder]: Removed 641 assume(true) statements. [2021-11-07 02:18:34,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:18:34 BoogieIcfgContainer [2021-11-07 02:18:34,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:18:34,271 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:18:34,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:18:34,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:18:34,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:18:26" (1/3) ... [2021-11-07 02:18:34,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43bdff0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:18:34, skipping insertion in model container [2021-11-07 02:18:34,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:27" (2/3) ... [2021-11-07 02:18:34,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43bdff0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:18:34, skipping insertion in model container [2021-11-07 02:18:34,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:18:34" (3/3) ... [2021-11-07 02:18:34,278 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec6_product29.cil.c [2021-11-07 02:18:34,283 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:18:34,283 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 02:18:34,336 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:18:34,342 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 02:18:34,342 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 02:18:34,382 INFO L276 IsEmpty]: Start isEmpty. Operand has 1046 states, 1039 states have (on average 1.7564966313763233) internal successors, (1825), 1045 states have internal predecessors, (1825), 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 02:18:34,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 02:18:34,397 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:34,397 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] [2021-11-07 02:18:34,398 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:18:34,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:34,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1349068281, now seen corresponding path program 1 times [2021-11-07 02:18:34,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:34,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [215258660] [2021-11-07 02:18:34,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:34,420 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:34,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:34,423 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:34,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:18:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:34,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:18:34,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:35,022 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 02:18:35,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:35,220 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 02:18:35,221 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:35,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [215258660] [2021-11-07 02:18:35,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [215258660] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:35,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:35,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:18:35,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589138489] [2021-11-07 02:18:35,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:18:35,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:35,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:18:35,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:18:35,256 INFO L87 Difference]: Start difference. First operand has 1046 states, 1039 states have (on average 1.7564966313763233) internal successors, (1825), 1045 states have internal predecessors, (1825), 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 28.5) internal successors, (57), 2 states have internal predecessors, (57), 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 02:18:35,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:35,356 INFO L93 Difference]: Finished difference Result 1811 states and 3134 transitions. [2021-11-07 02:18:35,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:18:35,358 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 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 57 [2021-11-07 02:18:35,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:35,384 INFO L225 Difference]: With dead ends: 1811 [2021-11-07 02:18:35,384 INFO L226 Difference]: Without dead ends: 924 [2021-11-07 02:18:35,424 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 112 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 02:18:35,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-11-07 02:18:35,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 924. [2021-11-07 02:18:35,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 918 states have (on average 1.7494553376906319) internal successors, (1606), 923 states have internal predecessors, (1606), 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 02:18:35,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1606 transitions. [2021-11-07 02:18:35,545 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1606 transitions. Word has length 57 [2021-11-07 02:18:35,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:35,546 INFO L470 AbstractCegarLoop]: Abstraction has 924 states and 1606 transitions. [2021-11-07 02:18:35,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 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 02:18:35,546 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1606 transitions. [2021-11-07 02:18:35,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 02:18:35,557 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:35,557 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] [2021-11-07 02:18:35,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:35,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:35,771 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:18:35,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:35,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1226870150, now seen corresponding path program 1 times [2021-11-07 02:18:35,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:35,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158839399] [2021-11-07 02:18:35,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:35,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:35,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:35,776 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:35,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:18:36,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:36,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:18:36,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:36,369 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 02:18:36,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:36,552 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 02:18:36,552 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:36,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158839399] [2021-11-07 02:18:36,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158839399] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:36,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:36,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:18:36,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106062435] [2021-11-07 02:18:36,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:36,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:36,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:36,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:36,561 INFO L87 Difference]: Start difference. First operand 924 states and 1606 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 02:18:36,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:36,733 INFO L93 Difference]: Finished difference Result 2742 states and 4770 transitions. [2021-11-07 02:18:36,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:18:36,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 58 [2021-11-07 02:18:36,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:36,749 INFO L225 Difference]: With dead ends: 2742 [2021-11-07 02:18:36,750 INFO L226 Difference]: Without dead ends: 1833 [2021-11-07 02:18:36,752 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 112 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 02:18:36,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2021-11-07 02:18:36,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 923. [2021-11-07 02:18:36,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 917 states have (on average 1.7459105779716466) internal successors, (1601), 922 states have internal predecessors, (1601), 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 02:18:36,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1601 transitions. [2021-11-07 02:18:36,804 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1601 transitions. Word has length 58 [2021-11-07 02:18:36,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:36,805 INFO L470 AbstractCegarLoop]: Abstraction has 923 states and 1601 transitions. [2021-11-07 02:18:36,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 02:18:36,805 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1601 transitions. [2021-11-07 02:18:36,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:18:36,812 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:36,813 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 02:18:36,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:37,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:37,027 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:18:37,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:37,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1998634540, now seen corresponding path program 1 times [2021-11-07 02:18:37,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:37,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612681097] [2021-11-07 02:18:37,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:37,032 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:37,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:37,033 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:37,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:18:37,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:37,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:18:37,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:37,646 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 02:18:37,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:37,821 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 02:18:37,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:37,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612681097] [2021-11-07 02:18:37,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612681097] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:37,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:37,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:18:37,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831746965] [2021-11-07 02:18:37,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:18:37,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:37,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:18:37,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:18:37,830 INFO L87 Difference]: Start difference. First operand 923 states and 1601 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 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 02:18:38,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:38,168 INFO L93 Difference]: Finished difference Result 3609 states and 6266 transitions. [2021-11-07 02:18:38,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:18:38,169 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 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 02:18:38,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:38,186 INFO L225 Difference]: With dead ends: 3609 [2021-11-07 02:18:38,186 INFO L226 Difference]: Without dead ends: 2704 [2021-11-07 02:18:38,188 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:18:38,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-11-07 02:18:38,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 922. [2021-11-07 02:18:38,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 916 states have (on average 1.7434497816593886) internal successors, (1597), 921 states have internal predecessors, (1597), 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 02:18:38,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1597 transitions. [2021-11-07 02:18:38,256 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1597 transitions. Word has length 60 [2021-11-07 02:18:38,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:38,257 INFO L470 AbstractCegarLoop]: Abstraction has 922 states and 1597 transitions. [2021-11-07 02:18:38,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 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 02:18:38,257 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1597 transitions. [2021-11-07 02:18:38,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 02:18:38,258 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:38,259 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 02:18:38,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:38,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:38,478 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:18:38,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:38,479 INFO L85 PathProgramCache]: Analyzing trace with hash 387507105, now seen corresponding path program 1 times [2021-11-07 02:18:38,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:38,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786436268] [2021-11-07 02:18:38,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:38,481 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:38,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:38,482 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:38,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:18:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:38,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:18:38,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:39,128 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 02:18:39,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:39,292 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 02:18:39,292 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:39,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786436268] [2021-11-07 02:18:39,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786436268] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:39,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:39,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:18:39,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936490849] [2021-11-07 02:18:39,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:39,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:39,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:39,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:39,295 INFO L87 Difference]: Start difference. First operand 922 states and 1597 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 02:18:39,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:39,394 INFO L93 Difference]: Finished difference Result 1841 states and 3191 transitions. [2021-11-07 02:18:39,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:18:39,395 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 02:18:39,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:39,401 INFO L225 Difference]: With dead ends: 1841 [2021-11-07 02:18:39,401 INFO L226 Difference]: Without dead ends: 927 [2021-11-07 02:18:39,403 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 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 02:18:39,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-11-07 02:18:39,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 922. [2021-11-07 02:18:39,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 916 states have (on average 1.740174672489083) internal successors, (1594), 921 states have internal predecessors, (1594), 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 02:18:39,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1594 transitions. [2021-11-07 02:18:39,487 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1594 transitions. Word has length 61 [2021-11-07 02:18:39,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:39,487 INFO L470 AbstractCegarLoop]: Abstraction has 922 states and 1594 transitions. [2021-11-07 02:18:39,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 02:18:39,487 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1594 transitions. [2021-11-07 02:18:39,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 02:18:39,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:39,489 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] [2021-11-07 02:18:39,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:39,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:39,690 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:18:39,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:39,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1131312148, now seen corresponding path program 1 times [2021-11-07 02:18:39,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:39,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527354757] [2021-11-07 02:18:39,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:39,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:39,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:39,692 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:39,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:18:40,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:40,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:18:40,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:40,311 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 02:18:40,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:40,480 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 02:18:40,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:40,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527354757] [2021-11-07 02:18:40,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527354757] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:40,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:40,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:18:40,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920329702] [2021-11-07 02:18:40,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:18:40,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:40,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:18:40,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:18:40,482 INFO L87 Difference]: Start difference. First operand 922 states and 1594 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:40,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:40,851 INFO L93 Difference]: Finished difference Result 3596 states and 6242 transitions. [2021-11-07 02:18:40,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:18:40,851 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 02:18:40,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:40,867 INFO L225 Difference]: With dead ends: 3596 [2021-11-07 02:18:40,868 INFO L226 Difference]: Without dead ends: 2700 [2021-11-07 02:18:40,870 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:18:40,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2021-11-07 02:18:40,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 922. [2021-11-07 02:18:40,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 916 states have (on average 1.7368995633187774) internal successors, (1591), 921 states have internal predecessors, (1591), 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 02:18:40,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1591 transitions. [2021-11-07 02:18:40,944 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1591 transitions. Word has length 62 [2021-11-07 02:18:40,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:40,945 INFO L470 AbstractCegarLoop]: Abstraction has 922 states and 1591 transitions. [2021-11-07 02:18:40,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:40,945 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1591 transitions. [2021-11-07 02:18:40,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:18:40,947 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:40,947 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] [2021-11-07 02:18:40,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:41,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:41,162 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:18:41,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:41,162 INFO L85 PathProgramCache]: Analyzing trace with hash 565863761, now seen corresponding path program 1 times [2021-11-07 02:18:41,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:41,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1062402306] [2021-11-07 02:18:41,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:41,163 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:41,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:41,166 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:41,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:18:41,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:41,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:18:41,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:41,824 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 02:18:41,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:41,955 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 02:18:41,956 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:41,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1062402306] [2021-11-07 02:18:41,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1062402306] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:41,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:41,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:18:41,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013903589] [2021-11-07 02:18:41,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:41,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:41,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:41,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:41,959 INFO L87 Difference]: Start difference. First operand 922 states and 1591 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:42,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:42,118 INFO L93 Difference]: Finished difference Result 2461 states and 4245 transitions. [2021-11-07 02:18:42,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:18:42,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 02:18:42,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:42,130 INFO L225 Difference]: With dead ends: 2461 [2021-11-07 02:18:42,130 INFO L226 Difference]: Without dead ends: 1818 [2021-11-07 02:18:42,132 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 124 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 02:18:42,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1818 states. [2021-11-07 02:18:42,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1818 to 1175. [2021-11-07 02:18:42,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 1169 states have (on average 1.7596236099230111) internal successors, (2057), 1174 states have internal predecessors, (2057), 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 02:18:42,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 2057 transitions. [2021-11-07 02:18:42,225 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 2057 transitions. Word has length 64 [2021-11-07 02:18:42,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:42,226 INFO L470 AbstractCegarLoop]: Abstraction has 1175 states and 2057 transitions. [2021-11-07 02:18:42,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:42,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 2057 transitions. [2021-11-07 02:18:42,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:18:42,228 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:42,228 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 02:18:42,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:42,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:42,444 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:18:42,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:42,445 INFO L85 PathProgramCache]: Analyzing trace with hash 499786560, now seen corresponding path program 1 times [2021-11-07 02:18:42,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:42,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080064090] [2021-11-07 02:18:42,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:42,446 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:42,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:42,447 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:42,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:18:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:42,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:18:42,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:43,106 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 02:18:43,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:43,288 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 02:18:43,288 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:43,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080064090] [2021-11-07 02:18:43,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080064090] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:43,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:43,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:18:43,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808745378] [2021-11-07 02:18:43,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:18:43,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:43,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:18:43,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:18:43,289 INFO L87 Difference]: Start difference. First operand 1175 states and 2057 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 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 02:18:43,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:43,437 INFO L93 Difference]: Finished difference Result 3110 states and 5444 transitions. [2021-11-07 02:18:43,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:18:43,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 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 02:18:43,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:43,450 INFO L225 Difference]: With dead ends: 3110 [2021-11-07 02:18:43,451 INFO L226 Difference]: Without dead ends: 2019 [2021-11-07 02:18:43,455 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:18:43,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2021-11-07 02:18:43,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1376. [2021-11-07 02:18:43,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1370 states have (on average 1.7708029197080293) internal successors, (2426), 1375 states have internal predecessors, (2426), 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 02:18:43,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 2426 transitions. [2021-11-07 02:18:43,574 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 2426 transitions. Word has length 76 [2021-11-07 02:18:43,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:43,577 INFO L470 AbstractCegarLoop]: Abstraction has 1376 states and 2426 transitions. [2021-11-07 02:18:43,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 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 02:18:43,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 2426 transitions. [2021-11-07 02:18:43,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 02:18:43,585 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:43,585 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:43,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:43,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:43,800 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:18:43,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:43,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1077709249, now seen corresponding path program 1 times [2021-11-07 02:18:43,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:43,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389641071] [2021-11-07 02:18:43,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:43,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:43,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:43,802 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:43,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:18:44,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:44,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:18:44,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:44,491 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 02:18:44,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:44,664 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 02:18:44,664 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:44,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389641071] [2021-11-07 02:18:44,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389641071] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:44,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:44,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:18:44,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116298298] [2021-11-07 02:18:44,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:18:44,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:44,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:18:44,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:18:44,670 INFO L87 Difference]: Start difference. First operand 1376 states and 2426 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:44,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:44,873 INFO L93 Difference]: Finished difference Result 3757 states and 6637 transitions. [2021-11-07 02:18:44,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:18:44,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 02:18:44,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:44,888 INFO L225 Difference]: With dead ends: 3757 [2021-11-07 02:18:44,889 INFO L226 Difference]: Without dead ends: 2469 [2021-11-07 02:18:44,892 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:18:44,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2021-11-07 02:18:45,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 1826. [2021-11-07 02:18:45,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1820 states have (on average 1.787912087912088) internal successors, (3254), 1825 states have internal predecessors, (3254), 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 02:18:45,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 3254 transitions. [2021-11-07 02:18:45,022 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 3254 transitions. Word has length 77 [2021-11-07 02:18:45,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:45,022 INFO L470 AbstractCegarLoop]: Abstraction has 1826 states and 3254 transitions. [2021-11-07 02:18:45,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:45,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 3254 transitions. [2021-11-07 02:18:45,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 02:18:45,026 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:45,026 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:45,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:45,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:45,242 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:18:45,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:45,242 INFO L85 PathProgramCache]: Analyzing trace with hash -157864975, now seen corresponding path program 1 times [2021-11-07 02:18:45,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:45,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974958127] [2021-11-07 02:18:45,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:45,243 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:45,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:45,244 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:45,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:18:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:45,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:18:45,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:45,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:46,182 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:46,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974958127] [2021-11-07 02:18:46,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974958127] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:46,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:46,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:18:46,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324846095] [2021-11-07 02:18:46,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:46,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:46,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:46,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:46,184 INFO L87 Difference]: Start difference. First operand 1826 states and 3254 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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 02:18:46,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:46,379 INFO L93 Difference]: Finished difference Result 4010 states and 7100 transitions. [2021-11-07 02:18:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:18:46,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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 02:18:46,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:46,395 INFO L225 Difference]: With dead ends: 4010 [2021-11-07 02:18:46,395 INFO L226 Difference]: Without dead ends: 2469 [2021-11-07 02:18:46,398 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 152 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 02:18:46,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2021-11-07 02:18:46,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 1826. [2021-11-07 02:18:46,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1820 states have (on average 1.786813186813187) internal successors, (3252), 1825 states have internal predecessors, (3252), 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 02:18:46,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 3252 transitions. [2021-11-07 02:18:46,559 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 3252 transitions. Word has length 78 [2021-11-07 02:18:46,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:46,559 INFO L470 AbstractCegarLoop]: Abstraction has 1826 states and 3252 transitions. [2021-11-07 02:18:46,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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 02:18:46,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 3252 transitions. [2021-11-07 02:18:46,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 02:18:46,563 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:46,563 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 02:18:46,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:46,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:46,778 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:18:46,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:46,779 INFO L85 PathProgramCache]: Analyzing trace with hash -674025006, now seen corresponding path program 1 times [2021-11-07 02:18:46,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:46,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [42401435] [2021-11-07 02:18:46,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:46,780 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:46,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:46,781 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:46,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:18:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:47,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:18:47,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:47,492 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 02:18:47,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:47,673 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 02:18:47,674 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:47,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [42401435] [2021-11-07 02:18:47,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [42401435] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:47,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:47,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:18:47,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377792036] [2021-11-07 02:18:47,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:18:47,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:47,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:18:47,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:18:47,676 INFO L87 Difference]: Start difference. First operand 1826 states and 3252 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 02:18:47,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:47,959 INFO L93 Difference]: Finished difference Result 5079 states and 9070 transitions. [2021-11-07 02:18:47,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:18:47,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 02:18:47,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:47,979 INFO L225 Difference]: With dead ends: 5079 [2021-11-07 02:18:47,980 INFO L226 Difference]: Without dead ends: 3349 [2021-11-07 02:18:47,983 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:18:47,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3349 states. [2021-11-07 02:18:48,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3349 to 2706. [2021-11-07 02:18:48,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2706 states, 2700 states have (on average 1.8040740740740742) internal successors, (4871), 2705 states have internal predecessors, (4871), 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 02:18:48,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2706 states to 2706 states and 4871 transitions. [2021-11-07 02:18:48,216 INFO L78 Accepts]: Start accepts. Automaton has 2706 states and 4871 transitions. Word has length 78 [2021-11-07 02:18:48,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:48,217 INFO L470 AbstractCegarLoop]: Abstraction has 2706 states and 4871 transitions. [2021-11-07 02:18:48,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 02:18:48,217 INFO L276 IsEmpty]: Start isEmpty. Operand 2706 states and 4871 transitions. [2021-11-07 02:18:48,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 02:18:48,222 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:48,222 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] [2021-11-07 02:18:48,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:48,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:48,438 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:18:48,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:48,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1668961855, now seen corresponding path program 1 times [2021-11-07 02:18:48,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:48,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099861445] [2021-11-07 02:18:48,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:48,439 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:48,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:48,440 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:48,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:18:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:49,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:18:49,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:49,177 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 02:18:49,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:49,353 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 02:18:49,353 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:49,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099861445] [2021-11-07 02:18:49,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099861445] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:49,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:49,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:18:49,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447156491] [2021-11-07 02:18:49,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:18:49,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:49,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:18:49,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:18:49,355 INFO L87 Difference]: Start difference. First operand 2706 states and 4871 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 02:18:49,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:49,656 INFO L93 Difference]: Finished difference Result 7455 states and 13446 transitions. [2021-11-07 02:18:49,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:18:49,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 79 [2021-11-07 02:18:49,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:49,691 INFO L225 Difference]: With dead ends: 7455 [2021-11-07 02:18:49,691 INFO L226 Difference]: Without dead ends: 4879 [2021-11-07 02:18:49,696 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:18:49,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2021-11-07 02:18:49,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 4236. [2021-11-07 02:18:49,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4236 states, 4230 states have (on average 1.816548463356974) internal successors, (7684), 4235 states have internal predecessors, (7684), 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 02:18:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4236 states to 4236 states and 7684 transitions. [2021-11-07 02:18:49,990 INFO L78 Accepts]: Start accepts. Automaton has 4236 states and 7684 transitions. Word has length 79 [2021-11-07 02:18:49,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:49,991 INFO L470 AbstractCegarLoop]: Abstraction has 4236 states and 7684 transitions. [2021-11-07 02:18:49,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 02:18:49,991 INFO L276 IsEmpty]: Start isEmpty. Operand 4236 states and 7684 transitions. [2021-11-07 02:18:49,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 02:18:49,999 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:49,999 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] [2021-11-07 02:18:50,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:50,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:50,215 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:18:50,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:50,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1862743265, now seen corresponding path program 1 times [2021-11-07 02:18:50,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:50,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267588926] [2021-11-07 02:18:50,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:50,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:50,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:50,217 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:50,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:18:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:50,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:18:50,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:51,053 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 02:18:51,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:51,224 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 02:18:51,224 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:51,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1267588926] [2021-11-07 02:18:51,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1267588926] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:51,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:51,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:18:51,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641095282] [2021-11-07 02:18:51,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:18:51,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:51,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:18:51,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:18:51,226 INFO L87 Difference]: Start difference. First operand 4236 states and 7684 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 02:18:51,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:51,655 INFO L93 Difference]: Finished difference Result 11761 states and 21368 transitions. [2021-11-07 02:18:51,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:18:51,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 80 [2021-11-07 02:18:51,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:51,675 INFO L225 Difference]: With dead ends: 11761 [2021-11-07 02:18:51,675 INFO L226 Difference]: Without dead ends: 7689 [2021-11-07 02:18:51,681 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:18:51,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7689 states. [2021-11-07 02:18:52,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7689 to 7046. [2021-11-07 02:18:52,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7046 states, 7040 states have (on average 1.8245738636363635) internal successors, (12845), 7045 states have internal predecessors, (12845), 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 02:18:52,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7046 states to 7046 states and 12845 transitions. [2021-11-07 02:18:52,134 INFO L78 Accepts]: Start accepts. Automaton has 7046 states and 12845 transitions. Word has length 80 [2021-11-07 02:18:52,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:52,135 INFO L470 AbstractCegarLoop]: Abstraction has 7046 states and 12845 transitions. [2021-11-07 02:18:52,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 02:18:52,136 INFO L276 IsEmpty]: Start isEmpty. Operand 7046 states and 12845 transitions. [2021-11-07 02:18:52,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 02:18:52,145 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:52,145 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:52,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:52,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:52,361 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:18:52,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:52,361 INFO L85 PathProgramCache]: Analyzing trace with hash -40020195, now seen corresponding path program 1 times [2021-11-07 02:18:52,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:52,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839749505] [2021-11-07 02:18:52,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:52,363 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:52,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:52,364 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:52,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:18:52,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:53,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:18:53,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:18:53,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:18:53,429 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:53,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839749505] [2021-11-07 02:18:53,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839749505] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:53,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:53,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:18:53,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615734604] [2021-11-07 02:18:53,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:18:53,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:53,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:18:53,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:18:53,430 INFO L87 Difference]: Start difference. First operand 7046 states and 12845 transitions. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 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 02:18:56,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:56,586 INFO L93 Difference]: Finished difference Result 26707 states and 48736 transitions. [2021-11-07 02:18:56,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:18:56,589 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 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 81 [2021-11-07 02:18:56,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:56,643 INFO L225 Difference]: With dead ends: 26707 [2021-11-07 02:18:56,644 INFO L226 Difference]: Without dead ends: 19944 [2021-11-07 02:18:56,654 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 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 02:18:56,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19944 states. [2021-11-07 02:18:57,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19944 to 6996. [2021-11-07 02:18:57,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6996 states, 6990 states have (on average 1.8090128755364807) internal successors, (12645), 6995 states have internal predecessors, (12645), 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 02:18:57,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6996 states to 6996 states and 12645 transitions. [2021-11-07 02:18:57,247 INFO L78 Accepts]: Start accepts. Automaton has 6996 states and 12645 transitions. Word has length 81 [2021-11-07 02:18:57,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:57,248 INFO L470 AbstractCegarLoop]: Abstraction has 6996 states and 12645 transitions. [2021-11-07 02:18:57,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 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 02:18:57,248 INFO L276 IsEmpty]: Start isEmpty. Operand 6996 states and 12645 transitions. [2021-11-07 02:18:57,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 02:18:57,262 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:57,263 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] [2021-11-07 02:18:57,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:57,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:57,463 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:18:57,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:57,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1299816238, now seen corresponding path program 1 times [2021-11-07 02:18:57,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:57,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497740320] [2021-11-07 02:18:57,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:57,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:57,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:57,465 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:57,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:18:58,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:58,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:18:58,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:58,459 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 02:18:58,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:58,652 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 02:18:58,652 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:58,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497740320] [2021-11-07 02:18:58,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497740320] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:58,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:58,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:18:58,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140773971] [2021-11-07 02:18:58,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:18:58,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:58,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:18:58,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:18:58,654 INFO L87 Difference]: Start difference. First operand 6996 states and 12645 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 02:18:59,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:59,239 INFO L93 Difference]: Finished difference Result 20502 states and 37105 transitions. [2021-11-07 02:18:59,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:18:59,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 81 [2021-11-07 02:18:59,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:59,272 INFO L225 Difference]: With dead ends: 20502 [2021-11-07 02:18:59,272 INFO L226 Difference]: Without dead ends: 13673 [2021-11-07 02:18:59,280 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:18:59,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13673 states. [2021-11-07 02:18:59,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13673 to 13030. [2021-11-07 02:18:59,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13030 states, 13024 states have (on average 1.8125) internal successors, (23606), 13029 states have internal predecessors, (23606), 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 02:18:59,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13030 states to 13030 states and 23606 transitions. [2021-11-07 02:18:59,881 INFO L78 Accepts]: Start accepts. Automaton has 13030 states and 23606 transitions. Word has length 81 [2021-11-07 02:18:59,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:59,882 INFO L470 AbstractCegarLoop]: Abstraction has 13030 states and 23606 transitions. [2021-11-07 02:18:59,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 02:18:59,882 INFO L276 IsEmpty]: Start isEmpty. Operand 13030 states and 23606 transitions. [2021-11-07 02:18:59,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 02:18:59,895 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:59,895 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:59,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:00,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:00,110 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:19:00,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:00,111 INFO L85 PathProgramCache]: Analyzing trace with hash 263490178, now seen corresponding path program 1 times [2021-11-07 02:19:00,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:00,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979612172] [2021-11-07 02:19:00,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:00,112 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:00,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:00,112 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:00,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:19:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:00,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:19:00,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:01,066 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:01,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:01,302 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:01,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979612172] [2021-11-07 02:19:01,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979612172] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:19:01,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [876790126] [2021-11-07 02:19:01,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:01,302 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:19:01,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:19:01,312 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:19:01,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 02:19:02,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:02,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:19:02,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:19:02,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:19:02,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [876790126] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:02,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:19:02,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 02:19:02,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044093164] [2021-11-07 02:19:02,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:19:02,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:02,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:19:02,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:19:02,820 INFO L87 Difference]: Start difference. First operand 13030 states and 23606 transitions. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 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 02:19:11,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:11,947 INFO L93 Difference]: Finished difference Result 85290 states and 154115 transitions. [2021-11-07 02:19:11,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 02:19:11,947 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 02:19:11,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:12,143 INFO L225 Difference]: With dead ends: 85290 [2021-11-07 02:19:12,144 INFO L226 Difference]: Without dead ends: 84665 [2021-11-07 02:19:12,161 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 02:19:12,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84665 states. [2021-11-07 02:19:14,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84665 to 25791. [2021-11-07 02:19:14,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25791 states, 25785 states have (on average 1.8135737832072911) internal successors, (46763), 25790 states have internal predecessors, (46763), 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 02:19:14,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25791 states to 25791 states and 46763 transitions. [2021-11-07 02:19:14,136 INFO L78 Accepts]: Start accepts. Automaton has 25791 states and 46763 transitions. Word has length 82 [2021-11-07 02:19:14,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:14,137 INFO L470 AbstractCegarLoop]: Abstraction has 25791 states and 46763 transitions. [2021-11-07 02:19:14,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 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 02:19:14,137 INFO L276 IsEmpty]: Start isEmpty. Operand 25791 states and 46763 transitions. [2021-11-07 02:19:14,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 02:19:14,181 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:14,181 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:19:14,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:14,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:14,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:19:14,595 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:19:14,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:14,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1963358751, now seen corresponding path program 1 times [2021-11-07 02:19:14,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:14,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032822566] [2021-11-07 02:19:14,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:14,596 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:14,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:14,598 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:14,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:19:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:15,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:19:15,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:15,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:15,833 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:15,834 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:15,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032822566] [2021-11-07 02:19:15,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032822566] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:19:15,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [386466765] [2021-11-07 02:19:15,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:15,834 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:19:15,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:19:15,835 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:19:15,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 02:19:16,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:16,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:19:16,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:17,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:19:17,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:19:17,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [386466765] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:17,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:19:17,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 02:19:17,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738369854] [2021-11-07 02:19:17,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:19:17,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:17,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:19:17,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:19:17,358 INFO L87 Difference]: Start difference. First operand 25791 states and 46763 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:20,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:20,744 INFO L93 Difference]: Finished difference Result 27539 states and 49726 transitions. [2021-11-07 02:19:20,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:19:20,744 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 02:19:20,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:20,786 INFO L225 Difference]: With dead ends: 27539 [2021-11-07 02:19:20,787 INFO L226 Difference]: Without dead ends: 26530 [2021-11-07 02:19:20,795 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:19:20,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26530 states. [2021-11-07 02:19:22,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26530 to 25785. [2021-11-07 02:19:22,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25785 states, 25779 states have (on average 1.8134916016912992) internal successors, (46750), 25784 states have internal predecessors, (46750), 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 02:19:22,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25785 states to 25785 states and 46750 transitions. [2021-11-07 02:19:22,206 INFO L78 Accepts]: Start accepts. Automaton has 25785 states and 46750 transitions. Word has length 83 [2021-11-07 02:19:22,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:22,207 INFO L470 AbstractCegarLoop]: Abstraction has 25785 states and 46750 transitions. [2021-11-07 02:19:22,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:22,207 INFO L276 IsEmpty]: Start isEmpty. Operand 25785 states and 46750 transitions. [2021-11-07 02:19:22,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 02:19:22,234 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:22,234 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:19:22,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:22,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:22,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:19:22,651 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:19:22,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:22,651 INFO L85 PathProgramCache]: Analyzing trace with hash 623832431, now seen corresponding path program 1 times [2021-11-07 02:19:22,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:22,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1306730238] [2021-11-07 02:19:22,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:22,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:22,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:22,653 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:22,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:19:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:23,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:19:23,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:23,671 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:19:23,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:19:23,864 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:23,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1306730238] [2021-11-07 02:19:23,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1306730238] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:23,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:23,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:19:23,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078904830] [2021-11-07 02:19:23,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:19:23,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:23,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:19:23,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:19:23,866 INFO L87 Difference]: Start difference. First operand 25785 states and 46750 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:25,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:25,223 INFO L93 Difference]: Finished difference Result 50789 states and 92294 transitions. [2021-11-07 02:19:25,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:19:25,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 02:19:25,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:25,257 INFO L225 Difference]: With dead ends: 50789 [2021-11-07 02:19:25,257 INFO L226 Difference]: Without dead ends: 25290 [2021-11-07 02:19:25,285 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 162 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 02:19:25,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25290 states. [2021-11-07 02:19:26,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25290 to 13028. [2021-11-07 02:19:26,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13028 states, 13022 states have (on average 1.8120872369835663) internal successors, (23597), 13027 states have internal predecessors, (23597), 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 02:19:26,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13028 states to 13028 states and 23597 transitions. [2021-11-07 02:19:26,606 INFO L78 Accepts]: Start accepts. Automaton has 13028 states and 23597 transitions. Word has length 83 [2021-11-07 02:19:26,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:26,606 INFO L470 AbstractCegarLoop]: Abstraction has 13028 states and 23597 transitions. [2021-11-07 02:19:26,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:26,607 INFO L276 IsEmpty]: Start isEmpty. Operand 13028 states and 23597 transitions. [2021-11-07 02:19:26,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 02:19:26,625 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:26,626 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:19:26,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-07 02:19:26,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:26,842 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:19:26,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:26,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1720126321, now seen corresponding path program 1 times [2021-11-07 02:19:26,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:26,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119685440] [2021-11-07 02:19:26,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:26,844 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:26,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:26,845 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:26,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 02:19:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:27,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:19:27,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:27,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:28,149 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:28,150 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:28,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119685440] [2021-11-07 02:19:28,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [119685440] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:19:28,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1061045537] [2021-11-07 02:19:28,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:28,150 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:19:28,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:19:28,152 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:19:28,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 02:19:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:29,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:19:29,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:19:30,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:19:30,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1061045537] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:30,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:19:30,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 02:19:30,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609110469] [2021-11-07 02:19:30,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:19:30,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:30,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:19:30,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:19:30,489 INFO L87 Difference]: Start difference. First operand 13028 states and 23597 transitions. Second operand has 16 states, 16 states have (on average 8.5625) internal successors, (137), 15 states have internal predecessors, (137), 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 02:19:50,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:50,875 INFO L93 Difference]: Finished difference Result 30819 states and 55044 transitions. [2021-11-07 02:19:50,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 02:19:50,876 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.5625) internal successors, (137), 15 states have internal predecessors, (137), 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 02:19:50,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:50,913 INFO L225 Difference]: With dead ends: 30819 [2021-11-07 02:19:50,913 INFO L226 Difference]: Without dead ends: 30242 [2021-11-07 02:19:50,917 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 02:19:50,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30242 states. [2021-11-07 02:19:52,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30242 to 25766. [2021-11-07 02:19:52,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25766 states, 25760 states have (on average 1.8133928571428573) internal successors, (46713), 25765 states have internal predecessors, (46713), 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 02:19:52,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25766 states to 25766 states and 46713 transitions. [2021-11-07 02:19:52,307 INFO L78 Accepts]: Start accepts. Automaton has 25766 states and 46713 transitions. Word has length 85 [2021-11-07 02:19:52,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:52,307 INFO L470 AbstractCegarLoop]: Abstraction has 25766 states and 46713 transitions. [2021-11-07 02:19:52,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.5625) internal successors, (137), 15 states have internal predecessors, (137), 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 02:19:52,307 INFO L276 IsEmpty]: Start isEmpty. Operand 25766 states and 46713 transitions. [2021-11-07 02:19:52,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 02:19:52,326 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:52,326 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:19:52,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:52,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-07 02:19:52,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:52,733 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:19:52,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:52,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1562344057, now seen corresponding path program 1 times [2021-11-07 02:19:52,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:52,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043117205] [2021-11-07 02:19:52,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:52,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:52,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:52,735 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:52,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 02:19:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:53,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:19:53,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:53,842 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:53,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:54,121 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:54,121 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:54,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043117205] [2021-11-07 02:19:54,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043117205] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:19:54,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [306402954] [2021-11-07 02:19:54,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:54,122 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:19:54,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:19:54,123 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:19:54,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 02:19:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:55,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:19:55,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:55,560 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:19:55,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:19:55,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [306402954] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:55,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:19:55,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 02:19:55,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905794742] [2021-11-07 02:19:55,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:19:55,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:55,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:19:55,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:19:55,716 INFO L87 Difference]: Start difference. First operand 25766 states and 46713 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 02:19:57,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:57,011 INFO L93 Difference]: Finished difference Result 26936 states and 48690 transitions. [2021-11-07 02:19:57,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:19:57,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 02:19:57,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:57,047 INFO L225 Difference]: With dead ends: 26936 [2021-11-07 02:19:57,048 INFO L226 Difference]: Without dead ends: 26298 [2021-11-07 02:19:57,052 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:19:57,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26298 states. [2021-11-07 02:19:58,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26298 to 25765. [2021-11-07 02:19:58,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25765 states, 25759 states have (on average 1.8133079700298924) internal successors, (46709), 25764 states have internal predecessors, (46709), 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 02:19:58,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25765 states to 25765 states and 46709 transitions. [2021-11-07 02:19:58,589 INFO L78 Accepts]: Start accepts. Automaton has 25765 states and 46709 transitions. Word has length 86 [2021-11-07 02:19:58,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:58,589 INFO L470 AbstractCegarLoop]: Abstraction has 25765 states and 46709 transitions. [2021-11-07 02:19:58,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 02:19:58,589 INFO L276 IsEmpty]: Start isEmpty. Operand 25765 states and 46709 transitions. [2021-11-07 02:19:58,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 02:19:58,602 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:58,602 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:19:58,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:58,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:59,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:59,003 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:19:59,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:59,004 INFO L85 PathProgramCache]: Analyzing trace with hash -915185865, now seen corresponding path program 1 times [2021-11-07 02:19:59,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:59,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [606160350] [2021-11-07 02:19:59,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:59,004 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:59,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:59,007 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:59,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 02:20:00,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:00,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:20:00,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:00,227 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:00,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:00,492 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:00,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [606160350] [2021-11-07 02:20:00,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [606160350] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:20:00,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1357079810] [2021-11-07 02:20:00,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:00,493 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:20:00,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:20:00,495 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:20:00,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 02:20:01,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:01,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 02:20:01,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:20:02,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:20:02,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1357079810] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:02,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:20:02,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 14 [2021-11-07 02:20:02,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140364140] [2021-11-07 02:20:02,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:20:02,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:02,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:20:02,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:20:02,546 INFO L87 Difference]: Start difference. First operand 25765 states and 46709 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 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 02:20:06,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:06,213 INFO L93 Difference]: Finished difference Result 27309 states and 49306 transitions. [2021-11-07 02:20:06,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:20:06,214 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 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 02:20:06,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:06,249 INFO L225 Difference]: With dead ends: 27309 [2021-11-07 02:20:06,249 INFO L226 Difference]: Without dead ends: 26221 [2021-11-07 02:20:06,256 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-11-07 02:20:06,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26221 states. [2021-11-07 02:20:07,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26221 to 25729. [2021-11-07 02:20:07,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25729 states, 25723 states have (on average 1.8126968083038526) internal successors, (46628), 25728 states have internal predecessors, (46628), 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 02:20:07,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25729 states to 25729 states and 46628 transitions. [2021-11-07 02:20:07,667 INFO L78 Accepts]: Start accepts. Automaton has 25729 states and 46628 transitions. Word has length 86 [2021-11-07 02:20:07,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:07,667 INFO L470 AbstractCegarLoop]: Abstraction has 25729 states and 46628 transitions. [2021-11-07 02:20:07,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 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 02:20:07,668 INFO L276 IsEmpty]: Start isEmpty. Operand 25729 states and 46628 transitions. [2021-11-07 02:20:07,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 02:20:07,680 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:07,680 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:20:07,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:07,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-07 02:20:08,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:08,081 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:20:08,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:08,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1151682545, now seen corresponding path program 1 times [2021-11-07 02:20:08,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:08,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [166357297] [2021-11-07 02:20:08,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:08,082 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:08,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:08,083 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:08,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 02:20:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:09,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:20:09,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:09,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:09,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:09,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:09,596 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:09,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [166357297] [2021-11-07 02:20:09,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [166357297] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:20:09,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1189151927] [2021-11-07 02:20:09,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:09,596 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:20:09,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:20:09,597 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:20:09,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 02:20:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:11,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:20:11,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:11,722 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:20:11,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:20:12,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1189151927] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:12,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:20:12,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 02:20:12,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128261840] [2021-11-07 02:20:12,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:20:12,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:12,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:20:12,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:20:12,284 INFO L87 Difference]: Start difference. First operand 25729 states and 46628 transitions. Second operand has 16 states, 16 states have (on average 8.6875) internal successors, (139), 15 states have internal predecessors, (139), 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 02:20:32,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:32,328 INFO L93 Difference]: Finished difference Result 58660 states and 105191 transitions. [2021-11-07 02:20:32,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 02:20:32,328 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.6875) internal successors, (139), 15 states have internal predecessors, (139), 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 02:20:32,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:32,404 INFO L225 Difference]: With dead ends: 58660 [2021-11-07 02:20:32,404 INFO L226 Difference]: Without dead ends: 57608 [2021-11-07 02:20:32,412 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 02:20:32,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57608 states. [2021-11-07 02:20:35,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57608 to 51095. [2021-11-07 02:20:35,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51095 states, 51089 states have (on average 1.8133649122120221) internal successors, (92643), 51094 states have internal predecessors, (92643), 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 02:20:35,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51095 states to 51095 states and 92643 transitions. [2021-11-07 02:20:35,261 INFO L78 Accepts]: Start accepts. Automaton has 51095 states and 92643 transitions. Word has length 86 [2021-11-07 02:20:35,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:35,261 INFO L470 AbstractCegarLoop]: Abstraction has 51095 states and 92643 transitions. [2021-11-07 02:20:35,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.6875) internal successors, (139), 15 states have internal predecessors, (139), 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 02:20:35,261 INFO L276 IsEmpty]: Start isEmpty. Operand 51095 states and 92643 transitions. [2021-11-07 02:20:35,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 02:20:35,285 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:35,285 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:20:35,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:35,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:35,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:20:35,699 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:20:35,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:35,700 INFO L85 PathProgramCache]: Analyzing trace with hash -932827827, now seen corresponding path program 1 times [2021-11-07 02:20:35,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:35,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593454633] [2021-11-07 02:20:35,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:35,701 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:35,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:35,702 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:35,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 02:20:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:36,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:20:36,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:37,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:37,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:37,314 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:37,315 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:37,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593454633] [2021-11-07 02:20:37,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593454633] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:20:37,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1942591253] [2021-11-07 02:20:37,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:37,315 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:20:37,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:20:37,316 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:20:37,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 02:20:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:38,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:20:38,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:20:39,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:39,602 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:20:39,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1942591253] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:39,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:20:39,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 14 [2021-11-07 02:20:39,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759079875] [2021-11-07 02:20:39,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:20:39,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:39,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:20:39,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:20:39,604 INFO L87 Difference]: Start difference. First operand 51095 states and 92643 transitions. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 7 states have internal predecessors, (152), 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 02:20:47,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:47,278 INFO L93 Difference]: Finished difference Result 69771 states and 124347 transitions. [2021-11-07 02:20:47,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:20:47,280 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 7 states have internal predecessors, (152), 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 02:20:47,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:47,375 INFO L225 Difference]: With dead ends: 69771 [2021-11-07 02:20:47,375 INFO L226 Difference]: Without dead ends: 67903 [2021-11-07 02:20:47,385 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-11-07 02:20:47,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67903 states. [2021-11-07 02:20:50,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67903 to 53203. [2021-11-07 02:20:50,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53203 states, 53197 states have (on average 1.8075831343872775) internal successors, (96158), 53202 states have internal predecessors, (96158), 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 02:20:50,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53203 states to 53203 states and 96158 transitions. [2021-11-07 02:20:50,843 INFO L78 Accepts]: Start accepts. Automaton has 53203 states and 96158 transitions. Word has length 86 [2021-11-07 02:20:50,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:50,843 INFO L470 AbstractCegarLoop]: Abstraction has 53203 states and 96158 transitions. [2021-11-07 02:20:50,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 7 states have internal predecessors, (152), 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 02:20:50,844 INFO L276 IsEmpty]: Start isEmpty. Operand 53203 states and 96158 transitions. [2021-11-07 02:20:50,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 02:20:50,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:50,881 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:20:50,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:51,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:51,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:20:51,298 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:20:51,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:51,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1245911671, now seen corresponding path program 1 times [2021-11-07 02:20:51,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:51,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [379178270] [2021-11-07 02:20:51,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:51,299 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:51,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:51,300 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:51,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 02:20:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:52,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:20:52,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:52,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:53,012 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:53,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [379178270] [2021-11-07 02:20:53,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [379178270] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:20:53,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [548982799] [2021-11-07 02:20:53,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:53,012 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:20:53,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:20:53,013 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:20:53,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d369b1f-5161-4de7-9fed-b30e9fedcb7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 02:20:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:54,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 02:20:54,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:54,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:20:54,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:55,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:20:55,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [548982799] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:55,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:20:55,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 15 [2021-11-07 02:20:55,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943283768] [2021-11-07 02:20:55,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 02:20:55,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:55,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 02:20:55,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:20:55,159 INFO L87 Difference]: Start difference. First operand 53203 states and 96158 transitions. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 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 02:20:59,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:59,453 INFO L93 Difference]: Finished difference Result 59783 states and 107267 transitions. [2021-11-07 02:20:59,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 02:20:59,454 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 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 87 [2021-11-07 02:20:59,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:59,528 INFO L225 Difference]: With dead ends: 59783 [2021-11-07 02:20:59,528 INFO L226 Difference]: Without dead ends: 55855 [2021-11-07 02:20:59,537 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-11-07 02:20:59,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55855 states.