./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec9_product12.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_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/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_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product12.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/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_c387045e-8f42-4d0e-81fc-4236a32d2b33/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 4d7925e6725ebc9ccc1628dac3a92336bad7d7149419f1b3b2e679ed4e3055d5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:54:21,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:54:21,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:54:21,444 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:54:21,445 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:54:21,446 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:54:21,448 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:54:21,451 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:54:21,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:54:21,454 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:54:21,456 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:54:21,457 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:54:21,458 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:54:21,459 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:54:21,461 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:54:21,463 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:54:21,464 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:54:21,465 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:54:21,467 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:54:21,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:54:21,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:54:21,473 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:54:21,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:54:21,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:54:21,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:54:21,481 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:54:21,481 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:54:21,483 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:54:21,483 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:54:21,485 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:54:21,485 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:54:21,486 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:54:21,487 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:54:21,488 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:54:21,490 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:54:21,490 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:54:21,491 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:54:21,491 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:54:21,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:54:21,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:54:21,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:54:21,494 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 00:54:21,521 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:54:21,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:54:21,522 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:54:21,523 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:54:21,523 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:54:21,523 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:54:21,523 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 00:54:21,523 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:54:21,524 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:54:21,524 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 00:54:21,524 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 00:54:21,524 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:54:21,524 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 00:54:21,525 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 00:54:21,525 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 00:54:21,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:54:21,526 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:54:21,526 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:54:21,526 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:54:21,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:54:21,527 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:54:21,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:54:21,531 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:54:21,531 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:54:21,532 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:54:21,532 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:54:21,532 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:54:21,532 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:54:21,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:54:21,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:54:21,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:54:21,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:54:21,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:54:21,536 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:54:21,537 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 00:54:21,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 00:54:21,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:54:21,538 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:54:21,539 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:54:21,539 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_c387045e-8f42-4d0e-81fc-4236a32d2b33/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d7925e6725ebc9ccc1628dac3a92336bad7d7149419f1b3b2e679ed4e3055d5 [2021-11-07 00:54:21,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:54:21,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:54:21,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:54:21,838 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:54:21,839 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:54:21,840 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec9_product12.cil.c [2021-11-07 00:54:21,920 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/data/713b37b78/47d3012de5454c1f88d5b2493c46bd03/FLAG4068ddb2f [2021-11-07 00:54:22,545 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:54:22,551 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/sv-benchmarks/c/product-lines/email_spec9_product12.cil.c [2021-11-07 00:54:22,584 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/data/713b37b78/47d3012de5454c1f88d5b2493c46bd03/FLAG4068ddb2f [2021-11-07 00:54:22,778 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/data/713b37b78/47d3012de5454c1f88d5b2493c46bd03 [2021-11-07 00:54:22,787 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:54:22,788 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:54:22,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:54:22,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:54:22,796 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:54:22,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:54:22" (1/1) ... [2021-11-07 00:54:22,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3817e7f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:22, skipping insertion in model container [2021-11-07 00:54:22,802 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:54:22" (1/1) ... [2021-11-07 00:54:22,808 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:54:22,864 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:54:23,310 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_c387045e-8f42-4d0e-81fc-4236a32d2b33/sv-benchmarks/c/product-lines/email_spec9_product12.cil.c[29763,29776] [2021-11-07 00:54:23,474 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:54:23,500 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 00:54:23,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@12bea8b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:23, skipping insertion in model container [2021-11-07 00:54:23,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:54:23,502 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 00:54:23,505 INFO L168 Benchmark]: Toolchain (without parser) took 714.41 ms. Allocated memory is still 98.6 MB. Free memory was 61.9 MB in the beginning and 59.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 00:54:23,506 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 98.6 MB. Free memory is still 51.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 00:54:23,508 INFO L168 Benchmark]: CACSL2BoogieTranslator took 709.02 ms. Allocated memory is still 98.6 MB. Free memory was 61.7 MB in the beginning and 59.5 MB in the end (delta: 2.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 00:54:23,510 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 98.6 MB. Free memory is still 51.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 709.02 ms. Allocated memory is still 98.6 MB. Free memory was 61.7 MB in the beginning and 59.5 MB in the end (delta: 2.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1120]: 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_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/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_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product12.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/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_c387045e-8f42-4d0e-81fc-4236a32d2b33/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 4d7925e6725ebc9ccc1628dac3a92336bad7d7149419f1b3b2e679ed4e3055d5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:54:25,730 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:54:25,734 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:54:25,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:54:25,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:54:25,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:54:25,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:54:25,799 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:54:25,802 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:54:25,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:54:25,815 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:54:25,817 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:54:25,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:54:25,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:54:25,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:54:25,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:54:25,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:54:25,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:54:25,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:54:25,844 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:54:25,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:54:25,848 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:54:25,852 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:54:25,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:54:25,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:54:25,866 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:54:25,867 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:54:25,868 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:54:25,870 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:54:25,871 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:54:25,871 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:54:25,872 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:54:25,874 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:54:25,875 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:54:25,877 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:54:25,878 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:54:25,879 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:54:25,879 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:54:25,879 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:54:25,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:54:25,882 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:54:25,883 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 00:54:25,950 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:54:25,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:54:25,953 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:54:25,953 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:54:25,954 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:54:25,954 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:54:25,954 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:54:25,954 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:54:25,955 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:54:25,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:54:25,957 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:54:25,958 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:54:25,958 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:54:25,958 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:54:25,959 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:54:25,959 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:54:25,959 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:54:25,959 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 00:54:25,959 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 00:54:25,960 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:54:25,960 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:54:25,960 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:54:25,960 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:54:25,961 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:54:25,961 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 00:54:25,961 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:54:25,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:54:25,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:54:25,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:54:25,962 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:54:25,962 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 00:54:25,963 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 00:54:25,963 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:54:25,963 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:54:25,964 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:54:25,964 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_c387045e-8f42-4d0e-81fc-4236a32d2b33/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d7925e6725ebc9ccc1628dac3a92336bad7d7149419f1b3b2e679ed4e3055d5 [2021-11-07 00:54:26,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:54:26,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:54:26,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:54:26,382 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:54:26,383 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:54:26,384 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec9_product12.cil.c [2021-11-07 00:54:26,464 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/data/bb1ca9dcd/253f7c0e976b4315b3c7ddebf40770b1/FLAG90c509e32 [2021-11-07 00:54:27,113 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:54:27,114 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/sv-benchmarks/c/product-lines/email_spec9_product12.cil.c [2021-11-07 00:54:27,149 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/data/bb1ca9dcd/253f7c0e976b4315b3c7ddebf40770b1/FLAG90c509e32 [2021-11-07 00:54:27,315 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/data/bb1ca9dcd/253f7c0e976b4315b3c7ddebf40770b1 [2021-11-07 00:54:27,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:54:27,319 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:54:27,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:54:27,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:54:27,335 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:54:27,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:54:27" (1/1) ... [2021-11-07 00:54:27,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14f42056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:27, skipping insertion in model container [2021-11-07 00:54:27,337 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:54:27" (1/1) ... [2021-11-07 00:54:27,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:54:27,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:54:27,926 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_c387045e-8f42-4d0e-81fc-4236a32d2b33/sv-benchmarks/c/product-lines/email_spec9_product12.cil.c[29763,29776] [2021-11-07 00:54:28,081 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:54:28,102 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 00:54:28,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:54:28,186 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_c387045e-8f42-4d0e-81fc-4236a32d2b33/sv-benchmarks/c/product-lines/email_spec9_product12.cil.c[29763,29776] [2021-11-07 00:54:28,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:54:28,246 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 00:54:28,293 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_c387045e-8f42-4d0e-81fc-4236a32d2b33/sv-benchmarks/c/product-lines/email_spec9_product12.cil.c[29763,29776] [2021-11-07 00:54:28,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:54:28,356 INFO L208 MainTranslator]: Completed translation [2021-11-07 00:54:28,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:28 WrapperNode [2021-11-07 00:54:28,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:54:28,358 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 00:54:28,358 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 00:54:28,359 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 00:54:28,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:28" (1/1) ... [2021-11-07 00:54:28,398 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:28" (1/1) ... [2021-11-07 00:54:28,538 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 00:54:28,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 00:54:28,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 00:54:28,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 00:54:28,552 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:28" (1/1) ... [2021-11-07 00:54:28,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:28" (1/1) ... [2021-11-07 00:54:28,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:28" (1/1) ... [2021-11-07 00:54:28,574 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:28" (1/1) ... [2021-11-07 00:54:28,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:28" (1/1) ... [2021-11-07 00:54:28,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:28" (1/1) ... [2021-11-07 00:54:28,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:28" (1/1) ... [2021-11-07 00:54:28,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 00:54:28,668 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 00:54:28,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 00:54:28,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 00:54:28,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:28" (1/1) ... [2021-11-07 00:54:28,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:54:28,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:54:28,701 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 00:54:28,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 00:54:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 00:54:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 00:54:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 00:54:28,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 00:54:28,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 00:54:32,858 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 00:54:32,861 INFO L299 CfgBuilder]: Removed 231 assume(true) statements. [2021-11-07 00:54:32,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:54:32 BoogieIcfgContainer [2021-11-07 00:54:32,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 00:54:32,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 00:54:32,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 00:54:32,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 00:54:32,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:54:27" (1/3) ... [2021-11-07 00:54:32,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c8a8f9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:54:32, skipping insertion in model container [2021-11-07 00:54:32,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:28" (2/3) ... [2021-11-07 00:54:32,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c8a8f9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:54:32, skipping insertion in model container [2021-11-07 00:54:32,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:54:32" (3/3) ... [2021-11-07 00:54:32,875 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec9_product12.cil.c [2021-11-07 00:54:32,884 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 00:54:32,884 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 00:54:32,959 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 00:54:32,967 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 00:54:32,968 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 00:54:32,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 380 states have (on average 1.7710526315789474) internal successors, (673), 382 states have internal predecessors, (673), 0 states have call successors, (0), 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 00:54:33,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 00:54:33,005 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:33,006 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:54:33,007 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:33,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:33,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1406579473, now seen corresponding path program 1 times [2021-11-07 00:54:33,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:33,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401121036] [2021-11-07 00:54:33,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:33,029 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:33,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:33,032 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:33,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 00:54:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:33,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 00:54:33,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:33,622 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 00:54:33,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:33,742 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 00:54:33,743 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:33,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401121036] [2021-11-07 00:54:33,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [401121036] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:33,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:33,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 00:54:33,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099184729] [2021-11-07 00:54:33,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 00:54:33,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:33,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 00:54:33,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 00:54:33,768 INFO L87 Difference]: Start difference. First operand has 383 states, 380 states have (on average 1.7710526315789474) internal successors, (673), 382 states have internal predecessors, (673), 0 states have call successors, (0), 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 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 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 00:54:33,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:33,814 INFO L93 Difference]: Finished difference Result 528 states and 912 transitions. [2021-11-07 00:54:33,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 00:54:33,816 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-07 00:54:33,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:33,830 INFO L225 Difference]: With dead ends: 528 [2021-11-07 00:54:33,831 INFO L226 Difference]: Without dead ends: 349 [2021-11-07 00:54:33,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 80 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 00:54:33,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-11-07 00:54:33,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2021-11-07 00:54:33,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 347 states have (on average 1.7636887608069165) internal successors, (612), 348 states have internal predecessors, (612), 0 states have call successors, (0), 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 00:54:33,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 612 transitions. [2021-11-07 00:54:33,910 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 612 transitions. Word has length 41 [2021-11-07 00:54:33,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:33,911 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 612 transitions. [2021-11-07 00:54:33,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 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 00:54:33,911 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 612 transitions. [2021-11-07 00:54:33,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 00:54:33,922 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:33,922 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] [2021-11-07 00:54:33,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 00:54:34,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:54:34,136 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:34,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:34,137 INFO L85 PathProgramCache]: Analyzing trace with hash -568777019, now seen corresponding path program 1 times [2021-11-07 00:54:34,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:34,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121105074] [2021-11-07 00:54:34,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:34,138 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:34,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:34,142 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:34,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 00:54:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:34,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 00:54:34,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:34,679 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 00:54:34,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:34,796 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 00:54:34,797 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:34,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121105074] [2021-11-07 00:54:34,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121105074] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:34,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:34,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:54:34,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176747156] [2021-11-07 00:54:34,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:54:34,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:34,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:54:34,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:54:34,802 INFO L87 Difference]: Start difference. First operand 349 states and 612 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 00:54:34,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:34,902 INFO L93 Difference]: Finished difference Result 1017 states and 1788 transitions. [2021-11-07 00:54:34,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:54:34,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 42 [2021-11-07 00:54:34,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:34,911 INFO L225 Difference]: With dead ends: 1017 [2021-11-07 00:54:34,911 INFO L226 Difference]: Without dead ends: 683 [2021-11-07 00:54:34,917 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 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 00:54:34,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-11-07 00:54:34,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 348. [2021-11-07 00:54:34,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 346 states have (on average 1.754335260115607) internal successors, (607), 347 states have internal predecessors, (607), 0 states have call successors, (0), 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 00:54:34,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 607 transitions. [2021-11-07 00:54:34,970 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 607 transitions. Word has length 42 [2021-11-07 00:54:34,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:34,971 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 607 transitions. [2021-11-07 00:54:34,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 00:54:34,972 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 607 transitions. [2021-11-07 00:54:34,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 00:54:34,987 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:34,987 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:54:35,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 00:54:35,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:54:35,204 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:35,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:35,204 INFO L85 PathProgramCache]: Analyzing trace with hash -364451297, now seen corresponding path program 1 times [2021-11-07 00:54:35,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:35,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [351956847] [2021-11-07 00:54:35,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:35,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:35,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:35,207 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:35,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 00:54:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:35,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:54:35,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:35,715 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 00:54:35,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:35,896 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 00:54:35,896 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:35,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [351956847] [2021-11-07 00:54:35,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [351956847] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:35,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:35,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:54:35,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124346858] [2021-11-07 00:54:35,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:54:35,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:35,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:54:35,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:54:35,899 INFO L87 Difference]: Start difference. First operand 348 states and 607 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 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 00:54:36,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:36,180 INFO L93 Difference]: Finished difference Result 1309 states and 2290 transitions. [2021-11-07 00:54:36,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 00:54:36,181 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 00:54:36,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:36,191 INFO L225 Difference]: With dead ends: 1309 [2021-11-07 00:54:36,191 INFO L226 Difference]: Without dead ends: 979 [2021-11-07 00:54:36,192 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 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 00:54:36,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-11-07 00:54:36,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 347. [2021-11-07 00:54:36,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 345 states have (on average 1.7478260869565216) internal successors, (603), 346 states have internal predecessors, (603), 0 states have call successors, (0), 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 00:54:36,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 603 transitions. [2021-11-07 00:54:36,230 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 603 transitions. Word has length 44 [2021-11-07 00:54:36,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:36,230 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 603 transitions. [2021-11-07 00:54:36,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 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 00:54:36,232 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 603 transitions. [2021-11-07 00:54:36,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 00:54:36,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:36,234 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] [2021-11-07 00:54:36,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 00:54:36,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:54:36,449 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:36,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:36,449 INFO L85 PathProgramCache]: Analyzing trace with hash 529516012, now seen corresponding path program 1 times [2021-11-07 00:54:36,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:36,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1746490317] [2021-11-07 00:54:36,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:36,450 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:36,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:36,454 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:36,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 00:54:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:36,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 00:54:36,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:37,010 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 00:54:37,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:37,156 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 00:54:37,156 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:37,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1746490317] [2021-11-07 00:54:37,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1746490317] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:37,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:37,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:54:37,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054748065] [2021-11-07 00:54:37,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:54:37,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:37,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:54:37,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:54:37,161 INFO L87 Difference]: Start difference. First operand 347 states and 603 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 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 00:54:37,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:37,244 INFO L93 Difference]: Finished difference Result 691 states and 1203 transitions. [2021-11-07 00:54:37,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:54:37,245 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 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 45 [2021-11-07 00:54:37,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:37,248 INFO L225 Difference]: With dead ends: 691 [2021-11-07 00:54:37,248 INFO L226 Difference]: Without dead ends: 352 [2021-11-07 00:54:37,249 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 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 00:54:37,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-07 00:54:37,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 347. [2021-11-07 00:54:37,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 345 states have (on average 1.7391304347826086) internal successors, (600), 346 states have internal predecessors, (600), 0 states have call successors, (0), 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 00:54:37,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 600 transitions. [2021-11-07 00:54:37,273 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 600 transitions. Word has length 45 [2021-11-07 00:54:37,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:37,273 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 600 transitions. [2021-11-07 00:54:37,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 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 00:54:37,274 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 600 transitions. [2021-11-07 00:54:37,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 00:54:37,275 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:37,275 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] [2021-11-07 00:54:37,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 00:54:37,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:54:37,494 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:37,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:37,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1405066185, now seen corresponding path program 1 times [2021-11-07 00:54:37,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:37,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [531729101] [2021-11-07 00:54:37,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:37,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:37,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:37,497 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:37,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 00:54:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:37,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:54:37,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:38,050 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 00:54:38,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:38,176 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 00:54:38,176 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:38,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [531729101] [2021-11-07 00:54:38,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [531729101] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:38,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:38,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:54:38,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271535157] [2021-11-07 00:54:38,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:54:38,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:38,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:54:38,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:54:38,179 INFO L87 Difference]: Start difference. First operand 347 states and 600 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:54:38,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:38,418 INFO L93 Difference]: Finished difference Result 1296 states and 2266 transitions. [2021-11-07 00:54:38,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 00:54:38,418 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 00:54:38,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:38,425 INFO L225 Difference]: With dead ends: 1296 [2021-11-07 00:54:38,425 INFO L226 Difference]: Without dead ends: 975 [2021-11-07 00:54:38,426 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 86 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 00:54:38,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-11-07 00:54:38,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 347. [2021-11-07 00:54:38,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 345 states have (on average 1.7304347826086957) internal successors, (597), 346 states have internal predecessors, (597), 0 states have call successors, (0), 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 00:54:38,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 597 transitions. [2021-11-07 00:54:38,458 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 597 transitions. Word has length 46 [2021-11-07 00:54:38,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:38,460 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 597 transitions. [2021-11-07 00:54:38,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:54:38,461 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 597 transitions. [2021-11-07 00:54:38,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 00:54:38,463 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:38,464 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] [2021-11-07 00:54:38,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 00:54:38,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:54:38,678 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:38,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:38,679 INFO L85 PathProgramCache]: Analyzing trace with hash 491431836, now seen corresponding path program 1 times [2021-11-07 00:54:38,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:38,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608641977] [2021-11-07 00:54:38,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:38,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:38,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:38,681 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:38,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 00:54:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:39,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:54:39,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:39,263 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 00:54:39,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:39,397 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 00:54:39,397 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:39,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608641977] [2021-11-07 00:54:39,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608641977] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:39,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:39,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:54:39,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165669140] [2021-11-07 00:54:39,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:54:39,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:39,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:54:39,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:54:39,399 INFO L87 Difference]: Start difference. First operand 347 states and 597 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:54:39,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:39,484 INFO L93 Difference]: Finished difference Result 779 states and 1345 transitions. [2021-11-07 00:54:39,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:54:39,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 00:54:39,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:39,490 INFO L225 Difference]: With dead ends: 779 [2021-11-07 00:54:39,490 INFO L226 Difference]: Without dead ends: 668 [2021-11-07 00:54:39,491 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 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 00:54:39,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-11-07 00:54:39,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 557. [2021-11-07 00:54:39,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 555 states have (on average 1.7675675675675675) internal successors, (981), 556 states have internal predecessors, (981), 0 states have call successors, (0), 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 00:54:39,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 981 transitions. [2021-11-07 00:54:39,541 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 981 transitions. Word has length 48 [2021-11-07 00:54:39,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:39,541 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 981 transitions. [2021-11-07 00:54:39,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:54:39,542 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 981 transitions. [2021-11-07 00:54:39,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 00:54:39,543 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:39,544 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 00:54:39,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 00:54:39,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:54:39,762 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:39,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:39,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1953209013, now seen corresponding path program 1 times [2021-11-07 00:54:39,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:39,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44750115] [2021-11-07 00:54:39,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:39,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:39,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:39,765 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:39,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 00:54:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:40,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:54:40,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:54:40,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:40,504 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 00:54:40,504 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:40,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44750115] [2021-11-07 00:54:40,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44750115] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:40,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:40,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:54:40,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785944432] [2021-11-07 00:54:40,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:54:40,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:40,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:54:40,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:54:40,506 INFO L87 Difference]: Start difference. First operand 557 states and 981 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 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 00:54:40,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:40,576 INFO L93 Difference]: Finished difference Result 1299 states and 2298 transitions. [2021-11-07 00:54:40,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:54:40,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 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 60 [2021-11-07 00:54:40,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:40,583 INFO L225 Difference]: With dead ends: 1299 [2021-11-07 00:54:40,583 INFO L226 Difference]: Without dead ends: 826 [2021-11-07 00:54:40,584 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 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 00:54:40,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-11-07 00:54:40,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 715. [2021-11-07 00:54:40,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 713 states have (on average 1.7784011220196354) internal successors, (1268), 714 states have internal predecessors, (1268), 0 states have call successors, (0), 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 00:54:40,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1268 transitions. [2021-11-07 00:54:40,650 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1268 transitions. Word has length 60 [2021-11-07 00:54:40,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:40,650 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 1268 transitions. [2021-11-07 00:54:40,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 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 00:54:40,651 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1268 transitions. [2021-11-07 00:54:40,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 00:54:40,652 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:40,653 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 00:54:40,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 00:54:40,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:54:40,868 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:40,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:40,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1132597812, now seen corresponding path program 1 times [2021-11-07 00:54:40,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:40,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1452934401] [2021-11-07 00:54:40,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:40,869 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:40,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:40,870 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:40,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 00:54:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:41,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:54:41,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:41,484 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 00:54:41,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:41,613 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 00:54:41,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:41,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1452934401] [2021-11-07 00:54:41,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1452934401] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:41,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:41,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:54:41,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974201] [2021-11-07 00:54:41,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:54:41,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:41,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:54:41,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:54:41,616 INFO L87 Difference]: Start difference. First operand 715 states and 1268 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 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 00:54:41,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:41,715 INFO L93 Difference]: Finished difference Result 1817 states and 3245 transitions. [2021-11-07 00:54:41,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:54:41,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 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 00:54:41,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:41,724 INFO L225 Difference]: With dead ends: 1817 [2021-11-07 00:54:41,724 INFO L226 Difference]: Without dead ends: 1190 [2021-11-07 00:54:41,725 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 119 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 00:54:41,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2021-11-07 00:54:41,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1079. [2021-11-07 00:54:41,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1077 states have (on average 1.7938718662952646) internal successors, (1932), 1078 states have internal predecessors, (1932), 0 states have call successors, (0), 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 00:54:41,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1932 transitions. [2021-11-07 00:54:41,806 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1932 transitions. Word has length 61 [2021-11-07 00:54:41,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:41,807 INFO L470 AbstractCegarLoop]: Abstraction has 1079 states and 1932 transitions. [2021-11-07 00:54:41,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 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 00:54:41,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1932 transitions. [2021-11-07 00:54:41,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 00:54:41,809 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:41,810 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] [2021-11-07 00:54:41,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-07 00:54:42,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:54:42,028 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:42,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:42,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1221111356, now seen corresponding path program 1 times [2021-11-07 00:54:42,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:42,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [321315491] [2021-11-07 00:54:42,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:42,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:42,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:42,032 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:42,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 00:54:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:42,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:54:42,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:42,618 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 00:54:42,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:42,773 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 00:54:42,773 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:42,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [321315491] [2021-11-07 00:54:42,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [321315491] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:42,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:42,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:54:42,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694765816] [2021-11-07 00:54:42,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:54:42,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:42,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:54:42,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:54:42,775 INFO L87 Difference]: Start difference. First operand 1079 states and 1932 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:54:42,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:42,907 INFO L93 Difference]: Finished difference Result 2027 states and 3626 transitions. [2021-11-07 00:54:42,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:54:42,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 00:54:42,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:42,915 INFO L225 Difference]: With dead ends: 2027 [2021-11-07 00:54:42,915 INFO L226 Difference]: Without dead ends: 1190 [2021-11-07 00:54:42,916 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 120 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 00:54:42,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2021-11-07 00:54:42,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1079. [2021-11-07 00:54:43,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1077 states have (on average 1.7920148560817084) internal successors, (1930), 1078 states have internal predecessors, (1930), 0 states have call successors, (0), 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 00:54:43,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1930 transitions. [2021-11-07 00:54:43,007 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1930 transitions. Word has length 62 [2021-11-07 00:54:43,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:43,007 INFO L470 AbstractCegarLoop]: Abstraction has 1079 states and 1930 transitions. [2021-11-07 00:54:43,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:54:43,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1930 transitions. [2021-11-07 00:54:43,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 00:54:43,010 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:43,010 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 00:54:43,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 00:54:43,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:54:43,224 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:43,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:43,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1210001443, now seen corresponding path program 1 times [2021-11-07 00:54:43,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:43,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [688231428] [2021-11-07 00:54:43,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:43,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:43,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:43,226 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:43,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 00:54:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:43,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:54:43,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:43,855 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 00:54:43,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:44,011 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 00:54:44,011 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:44,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [688231428] [2021-11-07 00:54:44,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [688231428] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:44,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:44,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:54:44,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039890958] [2021-11-07 00:54:44,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:54:44,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:44,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:54:44,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:54:44,014 INFO L87 Difference]: Start difference. First operand 1079 states and 1930 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 00:54:44,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:44,156 INFO L93 Difference]: Finished difference Result 2881 states and 5186 transitions. [2021-11-07 00:54:44,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:54:44,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 00:54:44,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:44,169 INFO L225 Difference]: With dead ends: 2881 [2021-11-07 00:54:44,169 INFO L226 Difference]: Without dead ends: 1898 [2021-11-07 00:54:44,182 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 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 00:54:44,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2021-11-07 00:54:44,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1787. [2021-11-07 00:54:44,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1785 states have (on average 1.8044817927170869) internal successors, (3221), 1786 states have internal predecessors, (3221), 0 states have call successors, (0), 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 00:54:44,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 3221 transitions. [2021-11-07 00:54:44,319 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 3221 transitions. Word has length 62 [2021-11-07 00:54:44,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:44,320 INFO L470 AbstractCegarLoop]: Abstraction has 1787 states and 3221 transitions. [2021-11-07 00:54:44,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 00:54:44,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 3221 transitions. [2021-11-07 00:54:44,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 00:54:44,323 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:44,323 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] [2021-11-07 00:54:44,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 00:54:44,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:54:44,538 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:44,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:44,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1842317750, now seen corresponding path program 1 times [2021-11-07 00:54:44,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:44,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [252351476] [2021-11-07 00:54:44,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:44,540 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:44,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:44,541 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:44,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 00:54:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:45,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:54:45,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:45,175 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 00:54:45,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:45,331 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 00:54:45,331 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:45,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [252351476] [2021-11-07 00:54:45,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [252351476] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:45,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:45,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:54:45,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953894138] [2021-11-07 00:54:45,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:54:45,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:45,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:54:45,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:54:45,333 INFO L87 Difference]: Start difference. First operand 1787 states and 3221 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 00:54:45,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:45,523 INFO L93 Difference]: Finished difference Result 4741 states and 8578 transitions. [2021-11-07 00:54:45,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:54:45,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-11-07 00:54:45,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:45,545 INFO L225 Difference]: With dead ends: 4741 [2021-11-07 00:54:45,545 INFO L226 Difference]: Without dead ends: 3084 [2021-11-07 00:54:45,548 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 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 00:54:45,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2021-11-07 00:54:45,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 2973. [2021-11-07 00:54:45,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2973 states, 2971 states have (on average 1.8101649276337934) internal successors, (5378), 2972 states have internal predecessors, (5378), 0 states have call successors, (0), 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 00:54:45,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 5378 transitions. [2021-11-07 00:54:45,829 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 5378 transitions. Word has length 63 [2021-11-07 00:54:45,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:45,831 INFO L470 AbstractCegarLoop]: Abstraction has 2973 states and 5378 transitions. [2021-11-07 00:54:45,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 00:54:45,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 5378 transitions. [2021-11-07 00:54:45,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 00:54:45,850 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:45,850 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 00:54:45,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 00:54:46,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:54:46,065 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:46,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:46,065 INFO L85 PathProgramCache]: Analyzing trace with hash -280831764, now seen corresponding path program 1 times [2021-11-07 00:54:46,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:46,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921182403] [2021-11-07 00:54:46,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:46,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:46,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:46,067 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:46,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 00:54:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:46,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:54:46,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:46,684 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 00:54:46,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:46,826 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 00:54:46,826 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:46,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921182403] [2021-11-07 00:54:46,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [921182403] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:46,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:46,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:54:46,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294668583] [2021-11-07 00:54:46,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:54:46,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:46,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:54:46,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:54:46,828 INFO L87 Difference]: Start difference. First operand 2973 states and 5378 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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 00:54:47,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:47,136 INFO L93 Difference]: Finished difference Result 8015 states and 14532 transitions. [2021-11-07 00:54:47,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:54:47,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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 64 [2021-11-07 00:54:47,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:47,169 INFO L225 Difference]: With dead ends: 8015 [2021-11-07 00:54:47,170 INFO L226 Difference]: Without dead ends: 5206 [2021-11-07 00:54:47,174 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 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 00:54:47,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5206 states. [2021-11-07 00:54:47,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5206 to 5095. [2021-11-07 00:54:47,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5095 states, 5093 states have (on average 1.8117023365403495) internal successors, (9227), 5094 states have internal predecessors, (9227), 0 states have call successors, (0), 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 00:54:47,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5095 states to 5095 states and 9227 transitions. [2021-11-07 00:54:47,608 INFO L78 Accepts]: Start accepts. Automaton has 5095 states and 9227 transitions. Word has length 64 [2021-11-07 00:54:47,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:47,609 INFO L470 AbstractCegarLoop]: Abstraction has 5095 states and 9227 transitions. [2021-11-07 00:54:47,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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 00:54:47,609 INFO L276 IsEmpty]: Start isEmpty. Operand 5095 states and 9227 transitions. [2021-11-07 00:54:47,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 00:54:47,614 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:47,615 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] [2021-11-07 00:54:47,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 00:54:47,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:54:47,832 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:47,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:47,833 INFO L85 PathProgramCache]: Analyzing trace with hash 688042344, now seen corresponding path program 1 times [2021-11-07 00:54:47,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:47,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229202840] [2021-11-07 00:54:47,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:47,834 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:47,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:47,835 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:47,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 00:54:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:48,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:54:48,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:48,607 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 00:54:48,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:48,800 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 00:54:48,800 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:48,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229202840] [2021-11-07 00:54:48,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229202840] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:48,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:48,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:54:48,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817155235] [2021-11-07 00:54:48,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:54:48,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:48,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:54:48,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:54:48,803 INFO L87 Difference]: Start difference. First operand 5095 states and 9227 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:54:51,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:51,885 INFO L93 Difference]: Finished difference Result 19032 states and 34510 transitions. [2021-11-07 00:54:51,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 00:54:51,888 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 00:54:51,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:51,955 INFO L225 Difference]: With dead ends: 19032 [2021-11-07 00:54:51,955 INFO L226 Difference]: Without dead ends: 14177 [2021-11-07 00:54:51,965 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 00:54:51,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14177 states. [2021-11-07 00:54:52,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14177 to 5045. [2021-11-07 00:54:52,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5045 states, 5043 states have (on average 1.7900059488399762) internal successors, (9027), 5044 states have internal predecessors, (9027), 0 states have call successors, (0), 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 00:54:52,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5045 states to 5045 states and 9027 transitions. [2021-11-07 00:54:52,500 INFO L78 Accepts]: Start accepts. Automaton has 5045 states and 9027 transitions. Word has length 65 [2021-11-07 00:54:52,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:52,501 INFO L470 AbstractCegarLoop]: Abstraction has 5045 states and 9027 transitions. [2021-11-07 00:54:52,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:54:52,501 INFO L276 IsEmpty]: Start isEmpty. Operand 5045 states and 9027 transitions. [2021-11-07 00:54:52,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 00:54:52,506 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:52,506 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] [2021-11-07 00:54:52,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 00:54:52,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:54:52,719 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:52,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:52,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1013284153, now seen corresponding path program 1 times [2021-11-07 00:54:52,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:52,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822874431] [2021-11-07 00:54:52,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:52,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:52,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:52,721 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:52,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 00:54:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:53,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:54:53,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:53,520 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 00:54:53,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:53,672 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 00:54:53,673 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:53,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [822874431] [2021-11-07 00:54:53,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [822874431] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:53,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:53,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:54:53,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876554004] [2021-11-07 00:54:53,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:54:53,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:53,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:54:53,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:54:53,675 INFO L87 Difference]: Start difference. First operand 5045 states and 9027 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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 00:54:54,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:54,165 INFO L93 Difference]: Finished difference Result 14692 states and 26333 transitions. [2021-11-07 00:54:54,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:54:54,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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 65 [2021-11-07 00:54:54,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:54,191 INFO L225 Difference]: With dead ends: 14692 [2021-11-07 00:54:54,191 INFO L226 Difference]: Without dead ends: 9814 [2021-11-07 00:54:54,199 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 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 00:54:54,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9814 states. [2021-11-07 00:54:54,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9814 to 9703. [2021-11-07 00:54:54,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9703 states, 9701 states have (on average 1.7899185650963818) internal successors, (17364), 9702 states have internal predecessors, (17364), 0 states have call successors, (0), 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 00:54:54,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9703 states to 9703 states and 17364 transitions. [2021-11-07 00:54:54,981 INFO L78 Accepts]: Start accepts. Automaton has 9703 states and 17364 transitions. Word has length 65 [2021-11-07 00:54:54,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:54,982 INFO L470 AbstractCegarLoop]: Abstraction has 9703 states and 17364 transitions. [2021-11-07 00:54:54,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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 00:54:54,983 INFO L276 IsEmpty]: Start isEmpty. Operand 9703 states and 17364 transitions. [2021-11-07 00:54:54,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 00:54:54,988 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:54,989 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] [2021-11-07 00:54:55,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 00:54:55,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:54:55,205 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:55,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:55,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1829810483, now seen corresponding path program 1 times [2021-11-07 00:54:55,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:55,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816041464] [2021-11-07 00:54:55,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:55,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:55,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:55,208 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:55,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 00:54:55,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:55,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:54:55,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:56,075 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 00:54:56,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:56,261 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 00:54:56,262 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:56,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816041464] [2021-11-07 00:54:56,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [816041464] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:54:56,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [475146003] [2021-11-07 00:54:56,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:56,262 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:54:56,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:54:56,264 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:54:56,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 00:54:57,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:57,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:54:57,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:57,278 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 00:54:57,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:57,508 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 00:54:57,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [475146003] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:57,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:54:57,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 00:54:57,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391542898] [2021-11-07 00:54:57,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:54:57,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:57,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:54:57,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:54:57,509 INFO L87 Difference]: Start difference. First operand 9703 states and 17364 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 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 00:54:58,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:58,133 INFO L93 Difference]: Finished difference Result 9772 states and 17475 transitions. [2021-11-07 00:54:58,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:54:58,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 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 66 [2021-11-07 00:54:58,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:58,157 INFO L225 Difference]: With dead ends: 9772 [2021-11-07 00:54:58,158 INFO L226 Difference]: Without dead ends: 9697 [2021-11-07 00:54:58,163 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:54:58,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9697 states. [2021-11-07 00:54:58,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9697 to 9697. [2021-11-07 00:54:58,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9697 states, 9696 states have (on average 1.7899133663366336) internal successors, (17355), 9696 states have internal predecessors, (17355), 0 states have call successors, (0), 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 00:54:58,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9697 states to 9697 states and 17355 transitions. [2021-11-07 00:54:58,813 INFO L78 Accepts]: Start accepts. Automaton has 9697 states and 17355 transitions. Word has length 66 [2021-11-07 00:54:58,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:58,814 INFO L470 AbstractCegarLoop]: Abstraction has 9697 states and 17355 transitions. [2021-11-07 00:54:58,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 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 00:54:58,814 INFO L276 IsEmpty]: Start isEmpty. Operand 9697 states and 17355 transitions. [2021-11-07 00:54:58,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 00:54:58,834 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:58,834 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, 1, 1, 1, 1, 1, 1] [2021-11-07 00:54:58,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 00:54:59,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 00:54:59,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:54:59,239 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:59,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:59,239 INFO L85 PathProgramCache]: Analyzing trace with hash 572714735, now seen corresponding path program 1 times [2021-11-07 00:54:59,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:59,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [19591738] [2021-11-07 00:54:59,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:59,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:59,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:59,241 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:59,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 00:54:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:59,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:54:59,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:00,144 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 00:55:00,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:55:00,411 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 00:55:00,411 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:55:00,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [19591738] [2021-11-07 00:55:00,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [19591738] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:55:00,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1748880858] [2021-11-07 00:55:00,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:00,412 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:55:00,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:55:00,412 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:55:00,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 00:55:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:01,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 00:55:01,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:02,044 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 00:55:02,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:55:02,440 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 00:55:02,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1748880858] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:02,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:55:02,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 00:55:02,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332404672] [2021-11-07 00:55:02,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 00:55:02,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:55:02,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 00:55:02,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 00:55:02,443 INFO L87 Difference]: Start difference. First operand 9697 states and 17355 transitions. Second operand has 16 states, 16 states have (on average 8.4375) internal successors, (135), 15 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:24,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:24,413 INFO L93 Difference]: Finished difference Result 19836 states and 35407 transitions. [2021-11-07 00:55:24,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 00:55:24,413 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.4375) internal successors, (135), 15 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-07 00:55:24,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:24,460 INFO L225 Difference]: With dead ends: 19836 [2021-11-07 00:55:24,461 INFO L226 Difference]: Without dead ends: 19751 [2021-11-07 00:55:24,466 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-11-07 00:55:24,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19751 states. [2021-11-07 00:55:25,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19751 to 19202. [2021-11-07 00:55:25,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19202 states, 19201 states have (on average 1.7912608718295921) internal successors, (34394), 19201 states have internal predecessors, (34394), 0 states have call successors, (0), 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 00:55:25,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19202 states to 19202 states and 34394 transitions. [2021-11-07 00:55:25,405 INFO L78 Accepts]: Start accepts. Automaton has 19202 states and 34394 transitions. Word has length 93 [2021-11-07 00:55:25,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:25,406 INFO L470 AbstractCegarLoop]: Abstraction has 19202 states and 34394 transitions. [2021-11-07 00:55:25,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.4375) internal successors, (135), 15 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:25,406 INFO L276 IsEmpty]: Start isEmpty. Operand 19202 states and 34394 transitions. [2021-11-07 00:55:25,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 00:55:25,441 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:25,442 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:25,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 00:55:25,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 00:55:25,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:55:25,855 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:55:25,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:25,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1982989744, now seen corresponding path program 1 times [2021-11-07 00:55:25,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:55:25,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982016863] [2021-11-07 00:55:25,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:25,857 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:55:25,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:55:25,857 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:55:25,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 00:55:26,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:26,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:55:26,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:26,915 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 00:55:26,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:55:27,194 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 00:55:27,195 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:55:27,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982016863] [2021-11-07 00:55:27,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982016863] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:55:27,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1266954333] [2021-11-07 00:55:27,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:27,195 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:55:27,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:55:27,196 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:55:27,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 00:55:28,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:28,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:55:28,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:28,374 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 00:55:28,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:55:28,545 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 00:55:28,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1266954333] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:28,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:55:28,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 00:55:28,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674185077] [2021-11-07 00:55:28,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:55:28,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:55:28,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:55:28,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 00:55:28,547 INFO L87 Difference]: Start difference. First operand 19202 states and 34394 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:29,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:29,278 INFO L93 Difference]: Finished difference Result 19301 states and 34556 transitions. [2021-11-07 00:55:29,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:55:29,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-07 00:55:29,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:29,313 INFO L225 Difference]: With dead ends: 19301 [2021-11-07 00:55:29,314 INFO L226 Difference]: Without dead ends: 19201 [2021-11-07 00:55:29,319 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 364 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 00:55:29,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19201 states. [2021-11-07 00:55:30,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19201 to 19201. [2021-11-07 00:55:30,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19201 states, 19200 states have (on average 1.7911458333333334) internal successors, (34390), 19200 states have internal predecessors, (34390), 0 states have call successors, (0), 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 00:55:30,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19201 states to 19201 states and 34390 transitions. [2021-11-07 00:55:30,636 INFO L78 Accepts]: Start accepts. Automaton has 19201 states and 34390 transitions. Word has length 94 [2021-11-07 00:55:30,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:30,636 INFO L470 AbstractCegarLoop]: Abstraction has 19201 states and 34390 transitions. [2021-11-07 00:55:30,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:30,637 INFO L276 IsEmpty]: Start isEmpty. Operand 19201 states and 34390 transitions. [2021-11-07 00:55:30,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 00:55:30,669 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:30,669 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:30,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 00:55:30,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-07 00:55:31,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:55:31,086 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:55:31,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:31,086 INFO L85 PathProgramCache]: Analyzing trace with hash 130436394, now seen corresponding path program 1 times [2021-11-07 00:55:31,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:55:31,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280393170] [2021-11-07 00:55:31,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:31,087 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:55:31,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:55:31,088 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:55:31,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 00:55:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:31,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:55:31,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:32,117 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 00:55:32,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:55:32,363 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 00:55:32,363 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:55:32,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280393170] [2021-11-07 00:55:32,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280393170] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:55:32,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1822048281] [2021-11-07 00:55:32,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:32,364 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:55:32,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:55:32,368 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:55:32,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 00:55:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:33,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 00:55:33,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:34,031 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 00:55:34,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:55:34,403 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 00:55:34,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1822048281] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:34,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:55:34,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 00:55:34,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426297214] [2021-11-07 00:55:34,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 00:55:34,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:55:34,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 00:55:34,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 00:55:34,406 INFO L87 Difference]: Start difference. First operand 19201 states and 34390 transitions. Second operand has 16 states, 16 states have (on average 8.625) internal successors, (138), 15 states have internal predecessors, (138), 0 states have call successors, (0), 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 00:55:52,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:52,481 INFO L93 Difference]: Finished difference Result 38902 states and 69552 transitions. [2021-11-07 00:55:52,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 00:55:52,481 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.625) internal successors, (138), 15 states have internal predecessors, (138), 0 states have call successors, (0), 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 95 [2021-11-07 00:55:52,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:52,555 INFO L225 Difference]: With dead ends: 38902 [2021-11-07 00:55:52,555 INFO L226 Difference]: Without dead ends: 38762 [2021-11-07 00:55:52,563 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2021-11-07 00:55:52,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38762 states. [2021-11-07 00:55:54,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38762 to 38130. [2021-11-07 00:55:54,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38130 states, 38129 states have (on average 1.7919169136352908) internal successors, (68324), 38129 states have internal predecessors, (68324), 0 states have call successors, (0), 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 00:55:54,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38130 states to 38130 states and 68324 transitions. [2021-11-07 00:55:54,518 INFO L78 Accepts]: Start accepts. Automaton has 38130 states and 68324 transitions. Word has length 95 [2021-11-07 00:55:54,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:54,519 INFO L470 AbstractCegarLoop]: Abstraction has 38130 states and 68324 transitions. [2021-11-07 00:55:54,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.625) internal successors, (138), 15 states have internal predecessors, (138), 0 states have call successors, (0), 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 00:55:54,519 INFO L276 IsEmpty]: Start isEmpty. Operand 38130 states and 68324 transitions. [2021-11-07 00:55:54,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 00:55:54,563 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:54,563 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:54,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 00:55:54,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 00:55:54,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:55:54,964 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:55:54,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:54,964 INFO L85 PathProgramCache]: Analyzing trace with hash 554083116, now seen corresponding path program 1 times [2021-11-07 00:55:54,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:55:54,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [33829636] [2021-11-07 00:55:54,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:54,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:55:54,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:55:54,966 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:55:54,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 00:55:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:55,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:55:55,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:56,071 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 00:55:56,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:55:56,311 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 00:55:56,311 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:55:56,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [33829636] [2021-11-07 00:55:56,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [33829636] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:55:56,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [658864450] [2021-11-07 00:55:56,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:56,311 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:55:56,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:55:56,312 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:55:56,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 00:55:57,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:57,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:55:57,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:57,827 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 00:55:57,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:55:58,096 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 00:55:58,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [658864450] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:58,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:55:58,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-07 00:55:58,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072476501] [2021-11-07 00:55:58,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:55:58,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:55:58,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:55:58,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 00:55:58,099 INFO L87 Difference]: Start difference. First operand 38130 states and 68324 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 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 00:56:00,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:00,086 INFO L93 Difference]: Finished difference Result 39165 states and 69943 transitions. [2021-11-07 00:56:00,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 00:56:00,086 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 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 95 [2021-11-07 00:56:00,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:00,154 INFO L225 Difference]: With dead ends: 39165 [2021-11-07 00:56:00,154 INFO L226 Difference]: Without dead ends: 38603 [2021-11-07 00:56:00,162 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-07 00:56:00,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38603 states. [2021-11-07 00:56:01,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38603 to 38186. [2021-11-07 00:56:01,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38186 states, 38185 states have (on average 1.791384051329056) internal successors, (68404), 38185 states have internal predecessors, (68404), 0 states have call successors, (0), 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 00:56:01,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38186 states to 38186 states and 68404 transitions. [2021-11-07 00:56:01,950 INFO L78 Accepts]: Start accepts. Automaton has 38186 states and 68404 transitions. Word has length 95 [2021-11-07 00:56:01,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:01,951 INFO L470 AbstractCegarLoop]: Abstraction has 38186 states and 68404 transitions. [2021-11-07 00:56:01,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 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 00:56:01,951 INFO L276 IsEmpty]: Start isEmpty. Operand 38186 states and 68404 transitions. [2021-11-07 00:56:01,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 00:56:01,984 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:01,984 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:02,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:02,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:02,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:56:02,399 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:56:02,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:02,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1581852817, now seen corresponding path program 1 times [2021-11-07 00:56:02,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:02,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162949306] [2021-11-07 00:56:02,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:02,401 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:02,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:02,402 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:02,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 00:56:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:03,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:56:03,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:03,608 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 00:56:03,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:03,849 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 00:56:03,849 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:03,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162949306] [2021-11-07 00:56:03,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162949306] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:56:03,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1983719039] [2021-11-07 00:56:03,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:03,850 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:56:03,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:56:03,851 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:56:03,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 00:56:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:05,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 00:56:05,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:05,457 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 00:56:05,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:05,655 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 00:56:05,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1983719039] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:05,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:56:05,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 14 [2021-11-07 00:56:05,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560599656] [2021-11-07 00:56:05,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:56:05,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:05,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:56:05,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-07 00:56:05,658 INFO L87 Difference]: Start difference. First operand 38186 states and 68404 transitions. Second operand has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:07,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:07,474 INFO L93 Difference]: Finished difference Result 38474 states and 68852 transitions. [2021-11-07 00:56:07,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 00:56:07,474 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-07 00:56:07,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:07,530 INFO L225 Difference]: With dead ends: 38474 [2021-11-07 00:56:07,531 INFO L226 Difference]: Without dead ends: 38247 [2021-11-07 00:56:07,539 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-11-07 00:56:07,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38247 states. [2021-11-07 00:56:09,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38247 to 38122. [2021-11-07 00:56:09,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38122 states, 38121 states have (on average 1.791558458592377) internal successors, (68296), 38121 states have internal predecessors, (68296), 0 states have call successors, (0), 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 00:56:09,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38122 states to 38122 states and 68296 transitions. [2021-11-07 00:56:09,410 INFO L78 Accepts]: Start accepts. Automaton has 38122 states and 68296 transitions. Word has length 96 [2021-11-07 00:56:09,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:09,411 INFO L470 AbstractCegarLoop]: Abstraction has 38122 states and 68296 transitions. [2021-11-07 00:56:09,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:09,411 INFO L276 IsEmpty]: Start isEmpty. Operand 38122 states and 68296 transitions. [2021-11-07 00:56:09,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 00:56:09,449 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:09,450 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:09,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:09,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-07 00:56:09,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:09,850 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:56:09,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:09,851 INFO L85 PathProgramCache]: Analyzing trace with hash 324754421, now seen corresponding path program 1 times [2021-11-07 00:56:09,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:09,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3500680] [2021-11-07 00:56:09,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:09,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:09,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:09,853 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:09,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 00:56:10,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:10,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:56:10,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:11,130 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 00:56:11,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:11,397 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 00:56:11,398 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:11,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [3500680] [2021-11-07 00:56:11,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [3500680] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:56:11,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [682176020] [2021-11-07 00:56:11,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:11,398 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:56:11,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:56:11,399 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:56:11,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 00:56:12,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:12,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:56:12,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:13,044 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 00:56:13,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:13,244 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 00:56:13,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [682176020] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:13,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:56:13,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 00:56:13,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576514759] [2021-11-07 00:56:13,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:56:13,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:13,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:56:13,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 00:56:13,246 INFO L87 Difference]: Start difference. First operand 38122 states and 68296 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 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 00:56:15,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:15,261 INFO L93 Difference]: Finished difference Result 38397 states and 68713 transitions. [2021-11-07 00:56:15,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:56:15,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 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 98 [2021-11-07 00:56:15,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:15,315 INFO L225 Difference]: With dead ends: 38397 [2021-11-07 00:56:15,315 INFO L226 Difference]: Without dead ends: 38151 [2021-11-07 00:56:15,322 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 00:56:15,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38151 states. [2021-11-07 00:56:16,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38151 to 38121. [2021-11-07 00:56:16,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38121 states, 38120 states have (on average 1.7911070304302203) internal successors, (68277), 38120 states have internal predecessors, (68277), 0 states have call successors, (0), 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 00:56:16,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38121 states to 38121 states and 68277 transitions. [2021-11-07 00:56:16,990 INFO L78 Accepts]: Start accepts. Automaton has 38121 states and 68277 transitions. Word has length 98 [2021-11-07 00:56:16,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:16,991 INFO L470 AbstractCegarLoop]: Abstraction has 38121 states and 68277 transitions. [2021-11-07 00:56:16,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 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 00:56:16,991 INFO L276 IsEmpty]: Start isEmpty. Operand 38121 states and 68277 transitions. [2021-11-07 00:56:17,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 00:56:17,048 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:17,049 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:17,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:17,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:17,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:56:17,463 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:56:17,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:17,464 INFO L85 PathProgramCache]: Analyzing trace with hash -425663637, now seen corresponding path program 1 times [2021-11-07 00:56:17,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:17,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43474596] [2021-11-07 00:56:17,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:17,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:17,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:17,466 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:17,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 00:56:18,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:18,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:56:18,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:18,881 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 00:56:18,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:19,178 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 00:56:19,178 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:19,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43474596] [2021-11-07 00:56:19,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43474596] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:56:19,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2001386870] [2021-11-07 00:56:19,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:19,178 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:56:19,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:56:19,179 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:56:19,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-07 00:56:20,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:20,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 00:56:20,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:21,520 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 00:56:21,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:21,970 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 00:56:21,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2001386870] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:21,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:56:21,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 00:56:21,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263629371] [2021-11-07 00:56:21,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 00:56:21,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:21,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 00:56:21,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 00:56:21,973 INFO L87 Difference]: Start difference. First operand 38121 states and 68277 transitions. Second operand has 16 states, 16 states have (on average 8.8125) internal successors, (141), 15 states have internal predecessors, (141), 0 states have call successors, (0), 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 00:56:39,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:39,701 INFO L93 Difference]: Finished difference Result 77255 states and 138029 transitions. [2021-11-07 00:56:39,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 00:56:39,703 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.8125) internal successors, (141), 15 states have internal predecessors, (141), 0 states have call successors, (0), 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 98 [2021-11-07 00:56:39,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:39,821 INFO L225 Difference]: With dead ends: 77255 [2021-11-07 00:56:39,821 INFO L226 Difference]: Without dead ends: 77010 [2021-11-07 00:56:39,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2021-11-07 00:56:39,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77010 states. [2021-11-07 00:56:43,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77010 to 75885. [2021-11-07 00:56:43,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75885 states, 75884 states have (on average 1.7915766169416478) internal successors, (135952), 75884 states have internal predecessors, (135952), 0 states have call successors, (0), 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 00:56:43,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75885 states to 75885 states and 135952 transitions. [2021-11-07 00:56:43,443 INFO L78 Accepts]: Start accepts. Automaton has 75885 states and 135952 transitions. Word has length 98 [2021-11-07 00:56:43,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:43,443 INFO L470 AbstractCegarLoop]: Abstraction has 75885 states and 135952 transitions. [2021-11-07 00:56:43,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.8125) internal successors, (141), 15 states have internal predecessors, (141), 0 states have call successors, (0), 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 00:56:43,444 INFO L276 IsEmpty]: Start isEmpty. Operand 75885 states and 135952 transitions. [2021-11-07 00:56:43,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 00:56:43,492 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:43,493 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:43,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:43,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2021-11-07 00:56:43,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:56:43,894 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:56:43,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:43,894 INFO L85 PathProgramCache]: Analyzing trace with hash 721858484, now seen corresponding path program 1 times [2021-11-07 00:56:43,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:43,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [105142817] [2021-11-07 00:56:43,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:43,895 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:43,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:43,896 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:43,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-07 00:56:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:45,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:56:45,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:45,398 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 00:56:45,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:45,675 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 00:56:45,675 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:45,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [105142817] [2021-11-07 00:56:45,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [105142817] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:56:45,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1594949188] [2021-11-07 00:56:45,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:45,676 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:56:45,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:56:45,677 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:56:45,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-07 00:56:47,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:47,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 00:56:47,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:47,845 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 00:56:47,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:48,047 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 00:56:48,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1594949188] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:48,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:56:48,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 00:56:48,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569609038] [2021-11-07 00:56:48,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:56:48,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:48,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:56:48,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 00:56:48,050 INFO L87 Difference]: Start difference. First operand 75885 states and 135952 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 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 00:56:51,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:51,220 INFO L93 Difference]: Finished difference Result 76670 states and 137142 transitions. [2021-11-07 00:56:51,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:56:51,221 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 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 98 [2021-11-07 00:56:51,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:51,342 INFO L225 Difference]: With dead ends: 76670 [2021-11-07 00:56:51,342 INFO L226 Difference]: Without dead ends: 76127 [2021-11-07 00:56:51,357 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 379 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 00:56:51,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76127 states. [2021-11-07 00:56:55,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76127 to 75845. [2021-11-07 00:56:55,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75845 states, 75844 states have (on average 1.791506249670376) internal successors, (135875), 75844 states have internal predecessors, (135875), 0 states have call successors, (0), 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 00:56:55,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75845 states to 75845 states and 135875 transitions. [2021-11-07 00:56:55,499 INFO L78 Accepts]: Start accepts. Automaton has 75845 states and 135875 transitions. Word has length 98 [2021-11-07 00:56:55,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:55,499 INFO L470 AbstractCegarLoop]: Abstraction has 75845 states and 135875 transitions. [2021-11-07 00:56:55,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 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 00:56:55,499 INFO L276 IsEmpty]: Start isEmpty. Operand 75845 states and 135875 transitions. [2021-11-07 00:56:55,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 00:56:55,565 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:55,565 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:55,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:55,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-07 00:56:55,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:55,966 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:56:55,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:55,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1515047541, now seen corresponding path program 1 times [2021-11-07 00:56:55,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:55,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166582720] [2021-11-07 00:56:55,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:55,968 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:55,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:55,969 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:55,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-07 00:56:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:57,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:56:57,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:57,565 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 00:56:57,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:57,826 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 00:56:57,827 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:57,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166582720] [2021-11-07 00:56:57,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1166582720] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:56:57,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [320192338] [2021-11-07 00:56:57,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:57,827 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:56:57,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:56:57,856 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:56:57,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c387045e-8f42-4d0e-81fc-4236a32d2b33/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-07 00:56:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:59,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 00:56:59,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:00,508 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 00:57:00,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:00,900 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 00:57:00,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [320192338] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:00,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:57:00,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 00:57:00,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901488844] [2021-11-07 00:57:00,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 00:57:00,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:00,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 00:57:00,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 00:57:00,903 INFO L87 Difference]: Start difference. First operand 75845 states and 135875 transitions. Second operand has 16 states, 16 states have (on average 8.9375) internal successors, (143), 15 states have internal predecessors, (143), 0 states have call successors, (0), 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 00:57:27,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:27,541 INFO L93 Difference]: Finished difference Result 152045 states and 272210 transitions. [2021-11-07 00:57:27,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 00:57:27,542 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.9375) internal successors, (143), 15 states have internal predecessors, (143), 0 states have call successors, (0), 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 99 [2021-11-07 00:57:27,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:27,981 INFO L225 Difference]: With dead ends: 152045 [2021-11-07 00:57:27,981 INFO L226 Difference]: Without dead ends: 151578 [2021-11-07 00:57:28,010 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2021-11-07 00:57:28,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151578 states.