./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec9_product34.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_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/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_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product34.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/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_ffc8aa54-bc6f-41b9-829c-0e33b236a752/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 f84999f0f81e33d8d10765588f1ef0eb7f6e4b27122985f82c092211345428dc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:32:54,440 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:32:54,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:32:54,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:32:54,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:32:54,482 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:32:54,484 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:32:54,487 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:32:54,490 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:32:54,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:32:54,493 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:32:54,495 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:32:54,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:32:54,497 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:32:54,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:32:54,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:32:54,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:32:54,505 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:32:54,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:32:54,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:32:54,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:32:54,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:32:54,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:32:54,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:32:54,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:32:54,524 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:32:54,524 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:32:54,526 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:32:54,527 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:32:54,528 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:32:54,529 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:32:54,530 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:32:54,531 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:32:54,533 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:32:54,534 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:32:54,535 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:32:54,536 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:32:54,537 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:32:54,537 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:32:54,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:32:54,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:32:54,541 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:32:54,576 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:32:54,576 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:32:54,578 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:32:54,578 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:32:54,579 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:32:54,579 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:32:54,579 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:32:54,580 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:32:54,584 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:32:54,584 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:32:54,584 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:32:54,585 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:32:54,585 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:32:54,585 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:32:54,586 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:32:54,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:32:54,587 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:32:54,588 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:32:54,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:32:54,589 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:32:54,589 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:32:54,589 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:32:54,589 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:32:54,590 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:32:54,590 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:32:54,590 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:32:54,590 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:32:54,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:32:54,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:32:54,591 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:32:54,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:32:54,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:32:54,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:32:54,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:32:54,593 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:32:54,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:32:54,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:32:54,594 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:32:54,594 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:32:54,594 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_ffc8aa54-bc6f-41b9-829c-0e33b236a752/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f84999f0f81e33d8d10765588f1ef0eb7f6e4b27122985f82c092211345428dc [2021-11-07 01:32:54,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:32:54,942 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:32:54,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:32:54,948 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:32:54,951 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:32:54,953 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec9_product34.cil.c [2021-11-07 01:32:55,042 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/data/2647b6b03/4b80dec6f2cd4b14aab47ad997c8fb32/FLAGa7347e32a [2021-11-07 01:32:56,002 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:32:56,004 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/sv-benchmarks/c/product-lines/email_spec9_product34.cil.c [2021-11-07 01:32:56,054 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/data/2647b6b03/4b80dec6f2cd4b14aab47ad997c8fb32/FLAGa7347e32a [2021-11-07 01:32:56,114 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/data/2647b6b03/4b80dec6f2cd4b14aab47ad997c8fb32 [2021-11-07 01:32:56,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:32:56,121 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:32:56,124 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:32:56,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:32:56,129 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:32:56,130 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:32:56" (1/1) ... [2021-11-07 01:32:56,132 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54297998 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:56, skipping insertion in model container [2021-11-07 01:32:56,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:32:56" (1/1) ... [2021-11-07 01:32:56,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:32:56,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:32:56,596 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_ffc8aa54-bc6f-41b9-829c-0e33b236a752/sv-benchmarks/c/product-lines/email_spec9_product34.cil.c[8301,8314] [2021-11-07 01:32:57,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:32:57,097 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 01:32:57,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5836e61a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:57, skipping insertion in model container [2021-11-07 01:32:57,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:32:57,099 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:32:57,101 INFO L168 Benchmark]: Toolchain (without parser) took 979.35 ms. Allocated memory is still 109.1 MB. Free memory was 76.9 MB in the beginning and 69.8 MB in the end (delta: 7.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:32:57,102 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 79.7 MB. Free memory is still 35.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:32:57,103 INFO L168 Benchmark]: CACSL2BoogieTranslator took 974.45 ms. Allocated memory is still 109.1 MB. Free memory was 76.9 MB in the beginning and 69.8 MB in the end (delta: 7.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:32:57,105 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 79.7 MB. Free memory is still 35.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 974.45 ms. Allocated memory is still 109.1 MB. Free memory was 76.9 MB in the beginning and 69.8 MB in the end (delta: 7.2 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: 938]: 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_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/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_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product34.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/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_ffc8aa54-bc6f-41b9-829c-0e33b236a752/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 f84999f0f81e33d8d10765588f1ef0eb7f6e4b27122985f82c092211345428dc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:32:59,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:32:59,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:32:59,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:32:59,692 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:32:59,694 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:32:59,696 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:32:59,698 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:32:59,701 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:32:59,702 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:32:59,704 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:32:59,705 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:32:59,706 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:32:59,707 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:32:59,709 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:32:59,711 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:32:59,712 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:32:59,714 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:32:59,716 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:32:59,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:32:59,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:32:59,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:32:59,724 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:32:59,725 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:32:59,730 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:32:59,730 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:32:59,731 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:32:59,732 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:32:59,733 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:32:59,734 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:32:59,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:32:59,736 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:32:59,737 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:32:59,738 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:32:59,740 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:32:59,740 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:32:59,749 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:32:59,750 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:32:59,750 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:32:59,751 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:32:59,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:32:59,754 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:32:59,798 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:32:59,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:32:59,800 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:32:59,801 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:32:59,801 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:32:59,801 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:32:59,801 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:32:59,802 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:32:59,802 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:32:59,803 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:32:59,805 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:32:59,805 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:32:59,805 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:32:59,805 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:32:59,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:32:59,806 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:32:59,806 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:32:59,806 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:32:59,806 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:32:59,807 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:32:59,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:32:59,807 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:32:59,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:32:59,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:32:59,808 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:32:59,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:32:59,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:32:59,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:32:59,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:32:59,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:32:59,809 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:32:59,809 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:32:59,810 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:32:59,810 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:32:59,810 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:32:59,811 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_ffc8aa54-bc6f-41b9-829c-0e33b236a752/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f84999f0f81e33d8d10765588f1ef0eb7f6e4b27122985f82c092211345428dc [2021-11-07 01:33:00,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:33:00,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:33:00,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:33:00,243 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:33:00,244 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:33:00,245 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec9_product34.cil.c [2021-11-07 01:33:00,318 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/data/125ef8113/82e2ee11775c4c14b9c803ce4442c7b9/FLAG7ac598239 [2021-11-07 01:33:01,026 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:33:01,027 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/sv-benchmarks/c/product-lines/email_spec9_product34.cil.c [2021-11-07 01:33:01,058 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/data/125ef8113/82e2ee11775c4c14b9c803ce4442c7b9/FLAG7ac598239 [2021-11-07 01:33:01,166 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/data/125ef8113/82e2ee11775c4c14b9c803ce4442c7b9 [2021-11-07 01:33:01,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:33:01,170 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:33:01,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:33:01,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:33:01,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:33:01,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:33:01" (1/1) ... [2021-11-07 01:33:01,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6284d2e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:01, skipping insertion in model container [2021-11-07 01:33:01,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:33:01" (1/1) ... [2021-11-07 01:33:01,185 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:33:01,256 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:33:01,638 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_ffc8aa54-bc6f-41b9-829c-0e33b236a752/sv-benchmarks/c/product-lines/email_spec9_product34.cil.c[8301,8314] [2021-11-07 01:33:02,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:33:02,051 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:33:02,072 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:33:02,095 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_ffc8aa54-bc6f-41b9-829c-0e33b236a752/sv-benchmarks/c/product-lines/email_spec9_product34.cil.c[8301,8314] [2021-11-07 01:33:02,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:33:02,238 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:33:02,257 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_ffc8aa54-bc6f-41b9-829c-0e33b236a752/sv-benchmarks/c/product-lines/email_spec9_product34.cil.c[8301,8314] [2021-11-07 01:33:02,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:33:02,401 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:33:02,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:02 WrapperNode [2021-11-07 01:33:02,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:33:02,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:33:02,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:33:02,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:33:02,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:02" (1/1) ... [2021-11-07 01:33:02,486 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:02" (1/1) ... [2021-11-07 01:33:02,717 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:33:02,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:33:02,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:33:02,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:33:02,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:02" (1/1) ... [2021-11-07 01:33:02,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:02" (1/1) ... [2021-11-07 01:33:02,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:02" (1/1) ... [2021-11-07 01:33:02,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:02" (1/1) ... [2021-11-07 01:33:02,874 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:02" (1/1) ... [2021-11-07 01:33:02,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:02" (1/1) ... [2021-11-07 01:33:02,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:02" (1/1) ... [2021-11-07 01:33:02,995 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:33:02,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:33:02,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:33:02,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:33:02,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:02" (1/1) ... [2021-11-07 01:33:03,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:33:03,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:33:03,031 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:33:03,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:33:03,093 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:33:03,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:33:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:33:03,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:33:03,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:33:10,170 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:33:10,171 INFO L299 CfgBuilder]: Removed 861 assume(true) statements. [2021-11-07 01:33:10,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:33:10 BoogieIcfgContainer [2021-11-07 01:33:10,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:33:10,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:33:10,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:33:10,182 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:33:10,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:33:01" (1/3) ... [2021-11-07 01:33:10,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d24f03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:33:10, skipping insertion in model container [2021-11-07 01:33:10,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:02" (2/3) ... [2021-11-07 01:33:10,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d24f03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:33:10, skipping insertion in model container [2021-11-07 01:33:10,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:33:10" (3/3) ... [2021-11-07 01:33:10,187 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec9_product34.cil.c [2021-11-07 01:33:10,194 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:33:10,195 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:33:10,309 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:33:10,319 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 01:33:10,320 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:33:10,375 INFO L276 IsEmpty]: Start isEmpty. Operand has 1266 states, 1259 states have (on average 1.722001588562351) internal successors, (2168), 1265 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states 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 01:33:10,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:33:10,394 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:10,395 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 01:33:10,395 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:10,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:10,402 INFO L85 PathProgramCache]: Analyzing trace with hash 940613266, now seen corresponding path program 1 times [2021-11-07 01:33:10,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:10,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045412217] [2021-11-07 01:33:10,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:10,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:10,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:10,426 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:10,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:33:10,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:10,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:33:10,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:11,200 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 01:33:11,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:11,364 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 01:33:11,365 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:11,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045412217] [2021-11-07 01:33:11,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045412217] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:11,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:11,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:33:11,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226323490] [2021-11-07 01:33:11,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:33:11,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:11,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:33:11,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:33:11,407 INFO L87 Difference]: Start difference. First operand has 1266 states, 1259 states have (on average 1.722001588562351) internal successors, (2168), 1265 states have internal predecessors, (2168), 0 states have call successors, (0), 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 24.0) internal successors, (48), 2 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 01:33:11,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:11,515 INFO L93 Difference]: Finished difference Result 2247 states and 3813 transitions. [2021-11-07 01:33:11,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:33:11,517 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 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 48 [2021-11-07 01:33:11,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:11,545 INFO L225 Difference]: With dead ends: 2247 [2021-11-07 01:33:11,545 INFO L226 Difference]: Without dead ends: 1044 [2021-11-07 01:33:11,556 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 94 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 01:33:11,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-11-07 01:33:11,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 1044. [2021-11-07 01:33:11,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1038 states have (on average 1.7254335260115607) internal successors, (1791), 1043 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states 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 01:33:11,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 1791 transitions. [2021-11-07 01:33:11,694 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 1791 transitions. Word has length 48 [2021-11-07 01:33:11,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:11,695 INFO L470 AbstractCegarLoop]: Abstraction has 1044 states and 1791 transitions. [2021-11-07 01:33:11,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 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 01:33:11,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 1791 transitions. [2021-11-07 01:33:11,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:33:11,706 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:11,706 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:11,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:11,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:11,923 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:11,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:11,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1847844406, now seen corresponding path program 1 times [2021-11-07 01:33:11,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:11,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738560656] [2021-11-07 01:33:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:11,926 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:11,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:11,927 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:11,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:33:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:12,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:33:12,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:12,612 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 01:33:12,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:12,789 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 01:33:12,790 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:12,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738560656] [2021-11-07 01:33:12,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738560656] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:12,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:12,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:33:12,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585682834] [2021-11-07 01:33:12,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:33:12,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:12,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:33:12,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:33:12,800 INFO L87 Difference]: Start difference. First operand 1044 states and 1791 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 01:33:13,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:13,004 INFO L93 Difference]: Finished difference Result 3102 states and 5325 transitions. [2021-11-07 01:33:13,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:33:13,005 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 49 [2021-11-07 01:33:13,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:13,022 INFO L225 Difference]: With dead ends: 3102 [2021-11-07 01:33:13,022 INFO L226 Difference]: Without dead ends: 2073 [2021-11-07 01:33:13,026 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 94 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 01:33:13,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2021-11-07 01:33:13,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 1043. [2021-11-07 01:33:13,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 1037 states have (on average 1.7222757955641272) internal successors, (1786), 1042 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states 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 01:33:13,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1786 transitions. [2021-11-07 01:33:13,122 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1786 transitions. Word has length 49 [2021-11-07 01:33:13,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:13,124 INFO L470 AbstractCegarLoop]: Abstraction has 1043 states and 1786 transitions. [2021-11-07 01:33:13,124 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 01:33:13,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1786 transitions. [2021-11-07 01:33:13,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:33:13,134 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:13,134 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] [2021-11-07 01:33:13,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:13,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:13,350 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:13,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:13,351 INFO L85 PathProgramCache]: Analyzing trace with hash -211368656, now seen corresponding path program 1 times [2021-11-07 01:33:13,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:13,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [482160351] [2021-11-07 01:33:13,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:13,353 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:13,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:13,354 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:13,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:33:13,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:13,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:33:13,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:14,096 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 01:33:14,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:14,302 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 01:33:14,303 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:14,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [482160351] [2021-11-07 01:33:14,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [482160351] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:14,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:14,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:33:14,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608513735] [2021-11-07 01:33:14,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:33:14,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:14,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:33:14,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:33:14,306 INFO L87 Difference]: Start difference. First operand 1043 states and 1786 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states 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 01:33:14,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:14,761 INFO L93 Difference]: Finished difference Result 4089 states and 7006 transitions. [2021-11-07 01:33:14,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:33:14,762 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 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 51 [2021-11-07 01:33:14,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:14,784 INFO L225 Difference]: With dead ends: 4089 [2021-11-07 01:33:14,784 INFO L226 Difference]: Without dead ends: 3064 [2021-11-07 01:33:14,787 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 96 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 01:33:14,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3064 states. [2021-11-07 01:33:14,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3064 to 1042. [2021-11-07 01:33:14,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1036 states have (on average 1.72007722007722) internal successors, (1782), 1041 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states 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 01:33:14,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 1782 transitions. [2021-11-07 01:33:14,882 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 1782 transitions. Word has length 51 [2021-11-07 01:33:14,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:14,883 INFO L470 AbstractCegarLoop]: Abstraction has 1042 states and 1782 transitions. [2021-11-07 01:33:14,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states 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 01:33:14,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 1782 transitions. [2021-11-07 01:33:14,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:33:14,885 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:14,885 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] [2021-11-07 01:33:14,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:15,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:15,100 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:15,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:15,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1915586365, now seen corresponding path program 1 times [2021-11-07 01:33:15,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:15,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [27978602] [2021-11-07 01:33:15,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:15,103 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:15,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:15,104 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:15,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:33:15,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:15,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:33:15,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:15,826 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 01:33:15,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:16,013 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 01:33:16,013 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:16,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [27978602] [2021-11-07 01:33:16,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [27978602] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:16,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:16,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:33:16,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456486385] [2021-11-07 01:33:16,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:33:16,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:16,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:33:16,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:33:16,021 INFO L87 Difference]: Start difference. First operand 1042 states and 1782 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 01:33:16,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:16,161 INFO L93 Difference]: Finished difference Result 2081 states and 3561 transitions. [2021-11-07 01:33:16,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:33:16,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 52 [2021-11-07 01:33:16,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:16,169 INFO L225 Difference]: With dead ends: 2081 [2021-11-07 01:33:16,170 INFO L226 Difference]: Without dead ends: 1047 [2021-11-07 01:33:16,172 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 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 01:33:16,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-11-07 01:33:16,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 1042. [2021-11-07 01:33:16,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1036 states have (on average 1.7171814671814671) internal successors, (1779), 1041 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states 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 01:33:16,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 1779 transitions. [2021-11-07 01:33:16,246 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 1779 transitions. Word has length 52 [2021-11-07 01:33:16,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:16,249 INFO L470 AbstractCegarLoop]: Abstraction has 1042 states and 1779 transitions. [2021-11-07 01:33:16,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 01:33:16,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 1779 transitions. [2021-11-07 01:33:16,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:33:16,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:16,251 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] [2021-11-07 01:33:16,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-07 01:33:16,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:16,464 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:16,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:16,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1010024424, now seen corresponding path program 1 times [2021-11-07 01:33:16,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:16,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424084863] [2021-11-07 01:33:16,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:16,466 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:16,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:16,467 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:16,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:33:17,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:17,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:33:17,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:17,275 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 01:33:17,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:17,462 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 01:33:17,462 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:17,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424084863] [2021-11-07 01:33:17,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424084863] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:17,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:17,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:33:17,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16932330] [2021-11-07 01:33:17,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:33:17,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:17,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:33:17,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:33:17,465 INFO L87 Difference]: Start difference. First operand 1042 states and 1779 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 01:33:17,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:17,930 INFO L93 Difference]: Finished difference Result 4076 states and 6982 transitions. [2021-11-07 01:33:17,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:33:17,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 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 53 [2021-11-07 01:33:17,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:17,953 INFO L225 Difference]: With dead ends: 4076 [2021-11-07 01:33:17,953 INFO L226 Difference]: Without dead ends: 3060 [2021-11-07 01:33:17,956 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 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 01:33:17,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3060 states. [2021-11-07 01:33:18,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3060 to 1042. [2021-11-07 01:33:18,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1036 states have (on average 1.7142857142857142) internal successors, (1776), 1041 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states 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 01:33:18,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 1776 transitions. [2021-11-07 01:33:18,070 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 1776 transitions. Word has length 53 [2021-11-07 01:33:18,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:18,070 INFO L470 AbstractCegarLoop]: Abstraction has 1042 states and 1776 transitions. [2021-11-07 01:33:18,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 01:33:18,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 1776 transitions. [2021-11-07 01:33:18,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:33:18,072 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:18,073 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:18,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:18,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:18,291 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:18,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:18,292 INFO L85 PathProgramCache]: Analyzing trace with hash -568897261, now seen corresponding path program 1 times [2021-11-07 01:33:18,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:18,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1885870397] [2021-11-07 01:33:18,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:18,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:18,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:18,295 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:18,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:33:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:18,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:33:18,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:19,092 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 01:33:19,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:19,249 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 01:33:19,250 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:19,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1885870397] [2021-11-07 01:33:19,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1885870397] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:19,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:19,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:33:19,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289946175] [2021-11-07 01:33:19,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:33:19,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:19,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:33:19,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:33:19,252 INFO L87 Difference]: Start difference. First operand 1042 states and 1776 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states 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 01:33:19,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:19,429 INFO L93 Difference]: Finished difference Result 2817 states and 4793 transitions. [2021-11-07 01:33:19,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:33:19,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 01:33:19,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:19,443 INFO L225 Difference]: With dead ends: 2817 [2021-11-07 01:33:19,443 INFO L226 Difference]: Without dead ends: 2058 [2021-11-07 01:33:19,445 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 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 01:33:19,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-11-07 01:33:19,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1299. [2021-11-07 01:33:19,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1293 states have (on average 1.7393658159319412) internal successors, (2249), 1298 states have internal predecessors, (2249), 0 states have call successors, (0), 0 states 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 01:33:19,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 2249 transitions. [2021-11-07 01:33:19,588 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 2249 transitions. Word has length 55 [2021-11-07 01:33:19,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:19,588 INFO L470 AbstractCegarLoop]: Abstraction has 1299 states and 2249 transitions. [2021-11-07 01:33:19,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states 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 01:33:19,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 2249 transitions. [2021-11-07 01:33:19,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:33:19,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:19,591 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:19,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:19,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:19,791 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:19,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:19,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1565617956, now seen corresponding path program 1 times [2021-11-07 01:33:19,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:19,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133483947] [2021-11-07 01:33:19,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:19,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:19,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:19,800 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:19,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:33:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:20,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:33:20,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:20,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:20,654 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 01:33:20,655 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:20,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133483947] [2021-11-07 01:33:20,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133483947] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:20,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:20,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:33:20,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958552082] [2021-11-07 01:33:20,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:33:20,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:20,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:33:20,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:20,657 INFO L87 Difference]: Start difference. First operand 1299 states and 2249 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:20,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:20,868 INFO L93 Difference]: Finished difference Result 3478 states and 6013 transitions. [2021-11-07 01:33:20,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:33:20,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:33:20,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:20,883 INFO L225 Difference]: With dead ends: 3478 [2021-11-07 01:33:20,883 INFO L226 Difference]: Without dead ends: 2263 [2021-11-07 01:33:20,886 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 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 01:33:20,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-11-07 01:33:21,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 1504. [2021-11-07 01:33:21,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1498 states have (on average 1.7523364485981308) internal successors, (2625), 1503 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states 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 01:33:21,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 2625 transitions. [2021-11-07 01:33:21,053 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 2625 transitions. Word has length 67 [2021-11-07 01:33:21,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:21,055 INFO L470 AbstractCegarLoop]: Abstraction has 1504 states and 2625 transitions. [2021-11-07 01:33:21,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:21,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 2625 transitions. [2021-11-07 01:33:21,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:33:21,059 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:21,059 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:21,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:21,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:21,280 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:21,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:21,281 INFO L85 PathProgramCache]: Analyzing trace with hash -57244797, now seen corresponding path program 1 times [2021-11-07 01:33:21,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:21,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1094113016] [2021-11-07 01:33:21,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:21,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:21,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:21,283 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:21,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:33:21,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:21,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:33:21,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:22,025 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 01:33:22,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:22,184 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 01:33:22,185 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:22,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1094113016] [2021-11-07 01:33:22,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1094113016] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:22,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:22,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:33:22,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735967359] [2021-11-07 01:33:22,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:33:22,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:22,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:33:22,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:22,187 INFO L87 Difference]: Start difference. First operand 1504 states and 2625 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:22,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:22,424 INFO L93 Difference]: Finished difference Result 4137 states and 7227 transitions. [2021-11-07 01:33:22,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:33:22,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:33:22,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:22,443 INFO L225 Difference]: With dead ends: 4137 [2021-11-07 01:33:22,444 INFO L226 Difference]: Without dead ends: 2721 [2021-11-07 01:33:22,448 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 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 01:33:22,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2021-11-07 01:33:22,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 1962. [2021-11-07 01:33:22,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1956 states have (on average 1.7724948875255624) internal successors, (3467), 1961 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states 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 01:33:22,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 3467 transitions. [2021-11-07 01:33:22,600 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 3467 transitions. Word has length 68 [2021-11-07 01:33:22,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:22,600 INFO L470 AbstractCegarLoop]: Abstraction has 1962 states and 3467 transitions. [2021-11-07 01:33:22,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:22,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 3467 transitions. [2021-11-07 01:33:22,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:33:22,604 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:22,604 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:22,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:22,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:22,821 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:22,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:22,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1667066253, now seen corresponding path program 1 times [2021-11-07 01:33:22,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:22,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1321543206] [2021-11-07 01:33:22,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:22,823 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:22,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:22,824 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:22,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:33:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:23,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:33:23,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:23,486 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 01:33:23,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:23,652 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 01:33:23,652 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:23,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1321543206] [2021-11-07 01:33:23,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1321543206] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:23,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:23,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:33:23,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294457845] [2021-11-07 01:33:23,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:33:23,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:23,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:33:23,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:33:23,654 INFO L87 Difference]: Start difference. First operand 1962 states and 3467 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:23,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:23,868 INFO L93 Difference]: Finished difference Result 4394 states and 7697 transitions. [2021-11-07 01:33:23,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:33:23,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:33:23,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:23,887 INFO L225 Difference]: With dead ends: 4394 [2021-11-07 01:33:23,887 INFO L226 Difference]: Without dead ends: 2721 [2021-11-07 01:33:23,890 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 134 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 01:33:23,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2021-11-07 01:33:24,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 1962. [2021-11-07 01:33:24,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1956 states have (on average 1.771472392638037) internal successors, (3465), 1961 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states 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 01:33:24,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 3465 transitions. [2021-11-07 01:33:24,033 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 3465 transitions. Word has length 69 [2021-11-07 01:33:24,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:24,033 INFO L470 AbstractCegarLoop]: Abstraction has 1962 states and 3465 transitions. [2021-11-07 01:33:24,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:24,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 3465 transitions. [2021-11-07 01:33:24,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:33:24,040 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:24,040 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:24,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:24,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:24,256 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:24,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:24,256 INFO L85 PathProgramCache]: Analyzing trace with hash -2014555054, now seen corresponding path program 1 times [2021-11-07 01:33:24,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:24,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980972931] [2021-11-07 01:33:24,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:24,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:24,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:24,258 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:24,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:33:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:24,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:33:24,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:24,973 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 01:33:24,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:25,160 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:25,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980972931] [2021-11-07 01:33:25,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [980972931] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:25,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:25,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:33:25,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289423626] [2021-11-07 01:33:25,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:33:25,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:25,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:33:25,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:25,162 INFO L87 Difference]: Start difference. First operand 1962 states and 3465 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:25,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:25,427 INFO L93 Difference]: Finished difference Result 5483 states and 9702 transitions. [2021-11-07 01:33:25,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:33:25,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:33:25,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:25,474 INFO L225 Difference]: With dead ends: 5483 [2021-11-07 01:33:25,475 INFO L226 Difference]: Without dead ends: 3617 [2021-11-07 01:33:25,478 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 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 01:33:25,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3617 states. [2021-11-07 01:33:25,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3617 to 2858. [2021-11-07 01:33:25,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2858 states, 2852 states have (on average 1.7924263674614305) internal successors, (5112), 2857 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states 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 01:33:25,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 5112 transitions. [2021-11-07 01:33:25,685 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 5112 transitions. Word has length 69 [2021-11-07 01:33:25,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:25,685 INFO L470 AbstractCegarLoop]: Abstraction has 2858 states and 5112 transitions. [2021-11-07 01:33:25,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:25,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 5112 transitions. [2021-11-07 01:33:25,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:33:25,691 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:25,691 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:25,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:25,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:25,908 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:25,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:25,909 INFO L85 PathProgramCache]: Analyzing trace with hash 2068779333, now seen corresponding path program 1 times [2021-11-07 01:33:25,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:25,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389321303] [2021-11-07 01:33:25,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:25,910 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:25,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:25,910 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:25,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:33:26,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:26,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:33:26,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:26,668 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 01:33:26,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:26,812 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 01:33:26,812 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:26,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389321303] [2021-11-07 01:33:26,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389321303] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:26,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:26,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:33:26,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103968835] [2021-11-07 01:33:26,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:33:26,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:26,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:33:26,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:26,814 INFO L87 Difference]: Start difference. First operand 2858 states and 5112 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:27,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:27,117 INFO L93 Difference]: Finished difference Result 7907 states and 14162 transitions. [2021-11-07 01:33:27,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:33:27,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:33:27,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:27,153 INFO L225 Difference]: With dead ends: 7907 [2021-11-07 01:33:27,154 INFO L226 Difference]: Without dead ends: 5179 [2021-11-07 01:33:27,159 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 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 01:33:27,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5179 states. [2021-11-07 01:33:27,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5179 to 4420. [2021-11-07 01:33:27,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4420 states, 4414 states have (on average 1.8081105573176257) internal successors, (7981), 4419 states have internal predecessors, (7981), 0 states have call successors, (0), 0 states 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 01:33:27,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4420 states to 4420 states and 7981 transitions. [2021-11-07 01:33:27,509 INFO L78 Accepts]: Start accepts. Automaton has 4420 states and 7981 transitions. Word has length 70 [2021-11-07 01:33:27,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:27,510 INFO L470 AbstractCegarLoop]: Abstraction has 4420 states and 7981 transitions. [2021-11-07 01:33:27,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:27,511 INFO L276 IsEmpty]: Start isEmpty. Operand 4420 states and 7981 transitions. [2021-11-07 01:33:27,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:33:27,520 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:27,521 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:27,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:27,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:27,743 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:27,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:27,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1784097693, now seen corresponding path program 1 times [2021-11-07 01:33:27,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:27,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646004975] [2021-11-07 01:33:27,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:27,745 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:27,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:27,745 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:27,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:33:28,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:28,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:33:28,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:28,494 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 01:33:28,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:28,647 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:28,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646004975] [2021-11-07 01:33:28,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646004975] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:28,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:28,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:33:28,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439298678] [2021-11-07 01:33:28,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:33:28,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:28,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:33:28,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:28,648 INFO L87 Difference]: Start difference. First operand 4420 states and 7981 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:28,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:28,978 INFO L93 Difference]: Finished difference Result 12309 states and 22252 transitions. [2021-11-07 01:33:28,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:33:28,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:33:28,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:29,002 INFO L225 Difference]: With dead ends: 12309 [2021-11-07 01:33:29,003 INFO L226 Difference]: Without dead ends: 8053 [2021-11-07 01:33:29,009 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 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 01:33:29,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8053 states. [2021-11-07 01:33:29,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8053 to 7294. [2021-11-07 01:33:29,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7294 states, 7288 states have (on average 1.8186059275521405) internal successors, (13254), 7293 states have internal predecessors, (13254), 0 states have call successors, (0), 0 states 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 01:33:29,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7294 states to 7294 states and 13254 transitions. [2021-11-07 01:33:29,566 INFO L78 Accepts]: Start accepts. Automaton has 7294 states and 13254 transitions. Word has length 71 [2021-11-07 01:33:29,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:29,566 INFO L470 AbstractCegarLoop]: Abstraction has 7294 states and 13254 transitions. [2021-11-07 01:33:29,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:29,567 INFO L276 IsEmpty]: Start isEmpty. Operand 7294 states and 13254 transitions. [2021-11-07 01:33:29,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:33:29,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:29,575 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] [2021-11-07 01:33:29,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:29,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:29,792 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:29,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:29,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1700981191, now seen corresponding path program 1 times [2021-11-07 01:33:29,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:29,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202359721] [2021-11-07 01:33:29,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:29,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:29,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:29,795 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:29,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:33:30,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:30,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:33:30,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:30,628 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 01:33:30,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:30,876 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 01:33:30,876 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:30,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202359721] [2021-11-07 01:33:30,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202359721] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:30,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:30,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:33:30,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308735755] [2021-11-07 01:33:30,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:33:30,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:30,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:33:30,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:33:30,879 INFO L87 Difference]: Start difference. First operand 7294 states and 13254 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 01:33:34,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:34,606 INFO L93 Difference]: Finished difference Result 27687 states and 50351 transitions. [2021-11-07 01:33:34,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:33:34,607 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:33:34,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:34,670 INFO L225 Difference]: With dead ends: 27687 [2021-11-07 01:33:34,670 INFO L226 Difference]: Without dead ends: 20680 [2021-11-07 01:33:34,685 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:33:34,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20680 states. [2021-11-07 01:33:35,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20680 to 7244. [2021-11-07 01:33:35,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7244 states, 7238 states have (on average 1.8035368886432717) internal successors, (13054), 7243 states have internal predecessors, (13054), 0 states have call successors, (0), 0 states 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 01:33:35,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7244 states to 7244 states and 13054 transitions. [2021-11-07 01:33:35,407 INFO L78 Accepts]: Start accepts. Automaton has 7244 states and 13054 transitions. Word has length 72 [2021-11-07 01:33:35,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:35,407 INFO L470 AbstractCegarLoop]: Abstraction has 7244 states and 13054 transitions. [2021-11-07 01:33:35,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 01:33:35,408 INFO L276 IsEmpty]: Start isEmpty. Operand 7244 states and 13054 transitions. [2021-11-07 01:33:35,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:33:35,416 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:35,416 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:35,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:35,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:35,635 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:35,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:35,635 INFO L85 PathProgramCache]: Analyzing trace with hash 499134326, now seen corresponding path program 1 times [2021-11-07 01:33:35,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:35,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [327877706] [2021-11-07 01:33:35,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:35,636 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:35,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:35,637 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:35,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:33:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:36,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:33:36,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:36,632 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 01:33:36,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:36,806 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 01:33:36,806 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:36,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [327877706] [2021-11-07 01:33:36,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [327877706] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:36,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:36,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:33:36,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455611547] [2021-11-07 01:33:36,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:33:36,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:36,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:33:36,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:36,808 INFO L87 Difference]: Start difference. First operand 7244 states and 13054 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:37,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:37,349 INFO L93 Difference]: Finished difference Result 21110 states and 38094 transitions. [2021-11-07 01:33:37,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:33:37,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:33:37,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:37,392 INFO L225 Difference]: With dead ends: 21110 [2021-11-07 01:33:37,392 INFO L226 Difference]: Without dead ends: 14037 [2021-11-07 01:33:37,407 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 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 01:33:37,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14037 states. [2021-11-07 01:33:38,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14037 to 13278. [2021-11-07 01:33:38,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13278 states, 13272 states have (on average 1.8094484629294756) internal successors, (24015), 13277 states have internal predecessors, (24015), 0 states have call successors, (0), 0 states 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 01:33:38,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13278 states to 13278 states and 24015 transitions. [2021-11-07 01:33:38,198 INFO L78 Accepts]: Start accepts. Automaton has 13278 states and 24015 transitions. Word has length 72 [2021-11-07 01:33:38,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:38,198 INFO L470 AbstractCegarLoop]: Abstraction has 13278 states and 24015 transitions. [2021-11-07 01:33:38,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:38,199 INFO L276 IsEmpty]: Start isEmpty. Operand 13278 states and 24015 transitions. [2021-11-07 01:33:38,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:33:38,209 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:38,209 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] [2021-11-07 01:33:38,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 01:33:38,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:38,425 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:38,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:38,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1314021570, now seen corresponding path program 1 times [2021-11-07 01:33:38,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:38,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872091314] [2021-11-07 01:33:38,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:38,426 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:38,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:38,428 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:38,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:33:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:39,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:33:39,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:39,359 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 01:33:39,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:39,583 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 01:33:39,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:39,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872091314] [2021-11-07 01:33:39,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [872091314] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:33:39,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2105477678] [2021-11-07 01:33:39,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:39,584 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:33:39,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:33:39,595 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:33:39,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:33:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:40,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:33:40,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:40,836 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 01:33:40,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:41,063 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 01:33:41,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2105477678] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:41,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:33:41,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:33:41,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194596115] [2021-11-07 01:33:41,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:33:41,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:41,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:33:41,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:33:41,065 INFO L87 Difference]: Start difference. First operand 13278 states and 24015 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:41,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:41,674 INFO L93 Difference]: Finished difference Result 13939 states and 25116 transitions. [2021-11-07 01:33:41,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:33:41,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:33:41,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:41,700 INFO L225 Difference]: With dead ends: 13939 [2021-11-07 01:33:41,701 INFO L226 Difference]: Without dead ends: 13280 [2021-11-07 01:33:41,706 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 281 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 01:33:41,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13280 states. [2021-11-07 01:33:42,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13280 to 13266. [2021-11-07 01:33:42,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13266 states, 13262 states have (on average 1.8094555873925502) internal successors, (23997), 13265 states have internal predecessors, (23997), 0 states have call successors, (0), 0 states 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 01:33:42,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13266 states to 13266 states and 23997 transitions. [2021-11-07 01:33:42,440 INFO L78 Accepts]: Start accepts. Automaton has 13266 states and 23997 transitions. Word has length 73 [2021-11-07 01:33:42,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:42,441 INFO L470 AbstractCegarLoop]: Abstraction has 13266 states and 23997 transitions. [2021-11-07 01:33:42,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:42,441 INFO L276 IsEmpty]: Start isEmpty. Operand 13266 states and 23997 transitions. [2021-11-07 01:33:42,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 01:33:42,471 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:42,471 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:42,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:42,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:42,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:42,877 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:42,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:42,878 INFO L85 PathProgramCache]: Analyzing trace with hash 723699296, now seen corresponding path program 1 times [2021-11-07 01:33:42,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:42,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1576887065] [2021-11-07 01:33:42,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:42,879 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:42,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:42,880 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:42,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:33:43,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:43,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:33:43,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:43,928 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 01:33:43,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:44,294 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 01:33:44,294 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:44,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1576887065] [2021-11-07 01:33:44,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1576887065] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:33:44,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [142829614] [2021-11-07 01:33:44,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:44,295 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:33:44,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:33:44,297 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:33:44,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:33:45,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:45,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:33:45,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:45,698 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 01:33:45,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:46,194 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 01:33:46,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [142829614] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:46,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:33:46,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 01:33:46,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308055898] [2021-11-07 01:33:46,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:33:46,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:46,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:33:46,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:33:46,197 INFO L87 Difference]: Start difference. First operand 13266 states and 23997 transitions. Second operand has 10 states, 10 states have (on average 15.2) internal successors, (152), 10 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:53,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:53,950 INFO L93 Difference]: Finished difference Result 88782 states and 159793 transitions. [2021-11-07 01:33:53,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 01:33:53,951 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.2) internal successors, (152), 10 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-07 01:33:53,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:54,115 INFO L225 Difference]: With dead ends: 88782 [2021-11-07 01:33:54,116 INFO L226 Difference]: Without dead ends: 88053 [2021-11-07 01:33:54,136 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 01:33:54,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88053 states. [2021-11-07 01:33:56,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88053 to 26259. [2021-11-07 01:33:56,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26259 states, 26255 states have (on average 1.810588459341078) internal successors, (47537), 26258 states have internal predecessors, (47537), 0 states have call successors, (0), 0 states 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 01:33:56,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26259 states to 26259 states and 47537 transitions. [2021-11-07 01:33:56,358 INFO L78 Accepts]: Start accepts. Automaton has 26259 states and 47537 transitions. Word has length 117 [2021-11-07 01:33:56,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:56,359 INFO L470 AbstractCegarLoop]: Abstraction has 26259 states and 47537 transitions. [2021-11-07 01:33:56,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.2) internal successors, (152), 10 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:56,359 INFO L276 IsEmpty]: Start isEmpty. Operand 26259 states and 47537 transitions. [2021-11-07 01:33:56,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 01:33:56,594 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:56,595 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:56,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:56,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:56,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:56,996 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:56,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:56,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1518054317, now seen corresponding path program 1 times [2021-11-07 01:33:56,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:56,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603158395] [2021-11-07 01:33:56,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:56,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:56,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:56,998 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:57,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:33:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:57,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:33:57,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:58,194 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 01:33:58,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:58,489 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 01:33:58,489 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:58,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603158395] [2021-11-07 01:33:58,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603158395] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:58,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:58,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:33:58,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006829716] [2021-11-07 01:33:58,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:33:58,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:58,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:33:58,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:33:58,491 INFO L87 Difference]: Start difference. First operand 26259 states and 47537 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 01:33:59,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:59,859 INFO L93 Difference]: Finished difference Result 51735 states and 93865 transitions. [2021-11-07 01:33:59,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:33:59,860 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 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 118 [2021-11-07 01:33:59,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:59,903 INFO L225 Difference]: With dead ends: 51735 [2021-11-07 01:33:59,903 INFO L226 Difference]: Without dead ends: 25766 [2021-11-07 01:33:59,939 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:33:59,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25766 states. [2021-11-07 01:34:00,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25766 to 13268. [2021-11-07 01:34:00,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13268 states, 13264 states have (on average 1.8091073582629675) internal successors, (23996), 13267 states have internal predecessors, (23996), 0 states have call successors, (0), 0 states 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 01:34:00,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13268 states to 13268 states and 23996 transitions. [2021-11-07 01:34:00,968 INFO L78 Accepts]: Start accepts. Automaton has 13268 states and 23996 transitions. Word has length 118 [2021-11-07 01:34:00,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:00,969 INFO L470 AbstractCegarLoop]: Abstraction has 13268 states and 23996 transitions. [2021-11-07 01:34:00,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 01:34:00,969 INFO L276 IsEmpty]: Start isEmpty. Operand 13268 states and 23996 transitions. [2021-11-07 01:34:00,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-07 01:34:00,993 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:00,994 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:01,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-07 01:34:01,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:01,208 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:34:01,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:01,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1715298539, now seen corresponding path program 1 times [2021-11-07 01:34:01,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:01,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36108282] [2021-11-07 01:34:01,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:01,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:01,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:01,211 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:01,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:34:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:02,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:34:02,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:02,498 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 01:34:02,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:02,855 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 01:34:02,855 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:02,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36108282] [2021-11-07 01:34:02,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36108282] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:34:02,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1667766360] [2021-11-07 01:34:02,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:02,856 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:02,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:34:02,857 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:34:02,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 01:34:04,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:04,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:34:04,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:04,555 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 01:34:04,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:04,982 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 01:34:04,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1667766360] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:04,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:34:04,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:34:04,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945817774] [2021-11-07 01:34:04,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:34:04,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:04,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:34:04,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:34:04,985 INFO L87 Difference]: Start difference. First operand 13268 states and 23996 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 01:34:08,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:08,154 INFO L93 Difference]: Finished difference Result 14618 states and 26252 transitions. [2021-11-07 01:34:08,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:34:08,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 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 119 [2021-11-07 01:34:08,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:08,263 INFO L225 Difference]: With dead ends: 14618 [2021-11-07 01:34:08,263 INFO L226 Difference]: Without dead ends: 13878 [2021-11-07 01:34:08,266 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:34:08,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13878 states. [2021-11-07 01:34:08,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13878 to 13264. [2021-11-07 01:34:08,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13264 states, 13260 states have (on average 1.8090497737556561) internal successors, (23988), 13263 states have internal predecessors, (23988), 0 states have call successors, (0), 0 states 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 01:34:08,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13264 states to 13264 states and 23988 transitions. [2021-11-07 01:34:08,996 INFO L78 Accepts]: Start accepts. Automaton has 13264 states and 23988 transitions. Word has length 119 [2021-11-07 01:34:08,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:08,997 INFO L470 AbstractCegarLoop]: Abstraction has 13264 states and 23988 transitions. [2021-11-07 01:34:08,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 01:34:08,997 INFO L276 IsEmpty]: Start isEmpty. Operand 13264 states and 23988 transitions. [2021-11-07 01:34:09,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-07 01:34:09,012 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:09,012 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, 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 01:34:09,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:09,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:09,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:09,413 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:34:09,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:09,413 INFO L85 PathProgramCache]: Analyzing trace with hash -380177699, now seen corresponding path program 1 times [2021-11-07 01:34:09,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:09,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270387370] [2021-11-07 01:34:09,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:09,414 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:09,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:09,415 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:09,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:34:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:10,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:34:10,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:10,720 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 01:34:10,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:11,022 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 01:34:11,022 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:11,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270387370] [2021-11-07 01:34:11,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270387370] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:34:11,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [500217958] [2021-11-07 01:34:11,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:11,023 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:11,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:34:11,024 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:34:11,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 01:34:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:12,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:34:12,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:13,251 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 01:34:13,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:13,826 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 01:34:13,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [500217958] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:13,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:34:13,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:34:13,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357265592] [2021-11-07 01:34:13,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:34:13,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:13,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:34:13,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:34:13,828 INFO L87 Difference]: Start difference. First operand 13264 states and 23988 transitions. Second operand has 16 states, 16 states have (on average 10.8125) internal successors, (173), 15 states have internal predecessors, (173), 0 states have call successors, (0), 0 states 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 01:34:37,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:37,061 INFO L93 Difference]: Finished difference Result 35302 states and 62354 transitions. [2021-11-07 01:34:37,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 01:34:37,061 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 10.8125) internal successors, (173), 15 states have internal predecessors, (173), 0 states have call successors, (0), 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 121 [2021-11-07 01:34:37,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:37,106 INFO L225 Difference]: With dead ends: 35302 [2021-11-07 01:34:37,106 INFO L226 Difference]: Without dead ends: 34621 [2021-11-07 01:34:37,114 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1073, Invalid=3483, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 01:34:37,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34621 states. [2021-11-07 01:34:38,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34621 to 26883. [2021-11-07 01:34:38,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26883 states, 26879 states have (on average 1.8072100896610737) internal successors, (48576), 26882 states have internal predecessors, (48576), 0 states have call successors, (0), 0 states 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 01:34:38,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26883 states to 26883 states and 48576 transitions. [2021-11-07 01:34:38,781 INFO L78 Accepts]: Start accepts. Automaton has 26883 states and 48576 transitions. Word has length 121 [2021-11-07 01:34:38,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:38,782 INFO L470 AbstractCegarLoop]: Abstraction has 26883 states and 48576 transitions. [2021-11-07 01:34:38,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.8125) internal successors, (173), 15 states have internal predecessors, (173), 0 states have call successors, (0), 0 states 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 01:34:38,782 INFO L276 IsEmpty]: Start isEmpty. Operand 26883 states and 48576 transitions. [2021-11-07 01:34:38,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-07 01:34:38,817 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:38,817 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, 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 01:34:38,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:39,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:39,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:39,239 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:34:39,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:39,239 INFO L85 PathProgramCache]: Analyzing trace with hash -187767319, now seen corresponding path program 1 times [2021-11-07 01:34:39,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:39,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013275948] [2021-11-07 01:34:39,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:39,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:39,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:39,241 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:39,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:34:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:40,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:34:40,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:40,634 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 01:34:40,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:40,951 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 01:34:40,951 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:40,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013275948] [2021-11-07 01:34:40,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013275948] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:34:40,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1356300705] [2021-11-07 01:34:40,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:40,952 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:40,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:34:40,963 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:34:40,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:34:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:42,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:34:42,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:43,100 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 01:34:43,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:43,489 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 01:34:43,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1356300705] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:43,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:34:43,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-07 01:34:43,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37021240] [2021-11-07 01:34:43,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:34:43,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:43,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:34:43,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:34:43,491 INFO L87 Difference]: Start difference. First operand 26883 states and 48576 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 01:34:46,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:46,555 INFO L93 Difference]: Finished difference Result 56159 states and 101105 transitions. [2021-11-07 01:34:46,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:34:46,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 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 122 [2021-11-07 01:34:46,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:46,637 INFO L225 Difference]: With dead ends: 56159 [2021-11-07 01:34:46,637 INFO L226 Difference]: Without dead ends: 54575 [2021-11-07 01:34:46,647 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 475 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 01:34:46,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54575 states. [2021-11-07 01:34:49,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54575 to 52871. [2021-11-07 01:34:49,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52871 states, 52867 states have (on average 1.8087653923997957) internal successors, (95624), 52870 states have internal predecessors, (95624), 0 states have call successors, (0), 0 states 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 01:34:50,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52871 states to 52871 states and 95624 transitions. [2021-11-07 01:34:50,191 INFO L78 Accepts]: Start accepts. Automaton has 52871 states and 95624 transitions. Word has length 122 [2021-11-07 01:34:50,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:50,191 INFO L470 AbstractCegarLoop]: Abstraction has 52871 states and 95624 transitions. [2021-11-07 01:34:50,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 01:34:50,192 INFO L276 IsEmpty]: Start isEmpty. Operand 52871 states and 95624 transitions. [2021-11-07 01:34:50,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-07 01:34:50,301 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:50,301 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, 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 01:34:50,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-07 01:34:50,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:50,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:50,702 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:34:50,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:50,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1325691726, now seen corresponding path program 1 times [2021-11-07 01:34:50,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:50,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [595140074] [2021-11-07 01:34:50,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:50,704 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:50,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:50,705 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:50,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:34:51,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:52,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:34:52,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:52,320 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 01:34:52,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:52,682 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 01:34:52,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:52,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [595140074] [2021-11-07 01:34:52,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [595140074] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:34:52,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [613072696] [2021-11-07 01:34:52,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:52,683 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:52,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:34:52,684 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:34:52,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 01:34:54,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:54,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:34:54,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:54,646 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 01:34:54,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:54,917 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 01:34:54,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [613072696] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:54,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:34:54,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:34:54,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654708217] [2021-11-07 01:34:54,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:34:54,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:54,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:34:54,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:34:54,919 INFO L87 Difference]: Start difference. First operand 52871 states and 95624 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 01:34:58,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:58,074 INFO L93 Difference]: Finished difference Result 57251 states and 102899 transitions. [2021-11-07 01:34:58,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:34:58,074 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 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 122 [2021-11-07 01:34:58,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:58,161 INFO L225 Difference]: With dead ends: 57251 [2021-11-07 01:34:58,161 INFO L226 Difference]: Without dead ends: 54211 [2021-11-07 01:34:58,172 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 476 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 01:34:58,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54211 states. [2021-11-07 01:35:01,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54211 to 52519. [2021-11-07 01:35:01,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52519 states, 52515 states have (on average 1.809616300104732) internal successors, (95032), 52518 states have internal predecessors, (95032), 0 states have call successors, (0), 0 states 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 01:35:01,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52519 states to 52519 states and 95032 transitions. [2021-11-07 01:35:01,917 INFO L78 Accepts]: Start accepts. Automaton has 52519 states and 95032 transitions. Word has length 122 [2021-11-07 01:35:01,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:01,918 INFO L470 AbstractCegarLoop]: Abstraction has 52519 states and 95032 transitions. [2021-11-07 01:35:01,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 01:35:01,918 INFO L276 IsEmpty]: Start isEmpty. Operand 52519 states and 95032 transitions. [2021-11-07 01:35:01,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-07 01:35:01,976 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:01,976 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, 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 01:35:01,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:02,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2021-11-07 01:35:02,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:35:02,377 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:35:02,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:02,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1120404105, now seen corresponding path program 1 times [2021-11-07 01:35:02,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:02,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992706649] [2021-11-07 01:35:02,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:02,379 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:02,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:02,380 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:02,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 01:35:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:03,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:35:03,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:04,057 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 01:35:04,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:04,407 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 01:35:04,407 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:04,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992706649] [2021-11-07 01:35:04,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [992706649] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:35:04,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1436137824] [2021-11-07 01:35:04,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:04,408 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:35:04,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:35:04,418 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:35:04,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc8aa54-bc6f-41b9-829c-0e33b236a752/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 01:35:06,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:06,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:35:06,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:06,598 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 01:35:06,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:06,942 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 01:35:06,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1436137824] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:06,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:35:06,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 13 [2021-11-07 01:35:06,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281701266] [2021-11-07 01:35:06,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:35:06,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:06,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:35:06,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:35:06,944 INFO L87 Difference]: Start difference. First operand 52519 states and 95032 transitions. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:10,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:10,399 INFO L93 Difference]: Finished difference Result 57993 states and 104146 transitions. [2021-11-07 01:35:10,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:35:10,399 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-07 01:35:10,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:10,565 INFO L225 Difference]: With dead ends: 57993 [2021-11-07 01:35:10,565 INFO L226 Difference]: Without dead ends: 54899 [2021-11-07 01:35:10,574 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:35:10,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54899 states.