./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec11_product39.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_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/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_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product39.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/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_070dfa48-96ac-461e-af1b-e6d82840136b/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 d13022ac5777526b0e211d2bc2c4786b4fd03965aed567ff73b5cfbb8c2cd97a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:01:30,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:01:30,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:01:30,318 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:01:30,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:01:30,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:01:30,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:01:30,333 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:01:30,337 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:01:30,346 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:01:30,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:01:30,349 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:01:30,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:01:30,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:01:30,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:01:30,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:01:30,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:01:30,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:01:30,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:01:30,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:01:30,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:01:30,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:01:30,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:01:30,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:01:30,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:01:30,387 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:01:30,388 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:01:30,389 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:01:30,390 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:01:30,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:01:30,392 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:01:30,393 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:01:30,395 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:01:30,396 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:01:30,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:01:30,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:01:30,398 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:01:30,398 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:01:30,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:01:30,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:01:30,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:01:30,402 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:01:30,433 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:01:30,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:01:30,434 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:01:30,434 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:01:30,435 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:01:30,435 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:01:30,435 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:01:30,435 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:01:30,436 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:01:30,440 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:01:30,442 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:01:30,442 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:01:30,442 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:01:30,443 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:01:30,443 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:01:30,444 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:01:30,444 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:01:30,444 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:01:30,445 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:01:30,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:01:30,445 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:01:30,445 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:01:30,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:01:30,446 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:01:30,446 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:01:30,447 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:01:30,447 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:01:30,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:01:30,447 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:01:30,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:01:30,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:01:30,450 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:01:30,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:01:30,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:01:30,451 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:01:30,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:01:30,451 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:01:30,451 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:01:30,451 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:01:30,452 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_070dfa48-96ac-461e-af1b-e6d82840136b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d13022ac5777526b0e211d2bc2c4786b4fd03965aed567ff73b5cfbb8c2cd97a [2021-11-07 02:01:30,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:01:30,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:01:30,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:01:30,842 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:01:30,843 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:01:30,844 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product39.cil.c [2021-11-07 02:01:30,926 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/data/357779e16/6dc2af8a45f04c2fbd93d7b2d56b03ff/FLAG202850582 [2021-11-07 02:01:31,700 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:01:31,708 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/sv-benchmarks/c/product-lines/email_spec11_product39.cil.c [2021-11-07 02:01:31,746 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/data/357779e16/6dc2af8a45f04c2fbd93d7b2d56b03ff/FLAG202850582 [2021-11-07 02:01:31,816 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/data/357779e16/6dc2af8a45f04c2fbd93d7b2d56b03ff [2021-11-07 02:01:31,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:01:31,823 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:01:31,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:01:31,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:01:31,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:01:31,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:01:31" (1/1) ... [2021-11-07 02:01:31,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@769613e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:31, skipping insertion in model container [2021-11-07 02:01:31,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:01:31" (1/1) ... [2021-11-07 02:01:31,843 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:01:31,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:01:32,472 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_070dfa48-96ac-461e-af1b-e6d82840136b/sv-benchmarks/c/product-lines/email_spec11_product39.cil.c[17959,17972] [2021-11-07 02:01:32,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:01:32,689 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:01:32,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6bfa5a79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:32, skipping insertion in model container [2021-11-07 02:01:32,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:01:32,691 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:01:32,694 INFO L168 Benchmark]: Toolchain (without parser) took 868.63 ms. Allocated memory is still 123.7 MB. Free memory was 82.2 MB in the beginning and 84.3 MB in the end (delta: -2.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 02:01:32,696 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 123.7 MB. Free memory is still 101.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:01:32,699 INFO L168 Benchmark]: CACSL2BoogieTranslator took 865.33 ms. Allocated memory is still 123.7 MB. Free memory was 82.0 MB in the beginning and 84.3 MB in the end (delta: -2.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 02:01:32,702 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 123.7 MB. Free memory is still 101.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 865.33 ms. Allocated memory is still 123.7 MB. Free memory was 82.0 MB in the beginning and 84.3 MB in the end (delta: -2.4 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: 465]: 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_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/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_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product39.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/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_070dfa48-96ac-461e-af1b-e6d82840136b/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 d13022ac5777526b0e211d2bc2c4786b4fd03965aed567ff73b5cfbb8c2cd97a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:01:35,496 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:01:35,501 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:01:35,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:01:35,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:01:35,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:01:35,594 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:01:35,600 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:01:35,605 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:01:35,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:01:35,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:01:35,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:01:35,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:01:35,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:01:35,624 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:01:35,626 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:01:35,627 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:01:35,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:01:35,631 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:01:35,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:01:35,645 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:01:35,648 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:01:35,650 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:01:35,652 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:01:35,658 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:01:35,666 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:01:35,667 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:01:35,668 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:01:35,670 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:01:35,672 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:01:35,672 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:01:35,674 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:01:35,676 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:01:35,678 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:01:35,680 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:01:35,681 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:01:35,682 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:01:35,683 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:01:35,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:01:35,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:01:35,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:01:35,696 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:01:35,752 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:01:35,753 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:01:35,755 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:01:35,755 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:01:35,755 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:01:35,756 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:01:35,756 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:01:35,756 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:01:35,757 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:01:35,759 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:01:35,760 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:01:35,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:01:35,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:01:35,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:01:35,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:01:35,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:01:35,762 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:01:35,762 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:01:35,763 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:01:35,763 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:01:35,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:01:35,763 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:01:35,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:01:35,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:01:35,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:01:35,765 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:01:35,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:01:35,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:01:35,766 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:01:35,766 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:01:35,766 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:01:35,767 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:01:35,767 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:01:35,767 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:01:35,768 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:01:35,768 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_070dfa48-96ac-461e-af1b-e6d82840136b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d13022ac5777526b0e211d2bc2c4786b4fd03965aed567ff73b5cfbb8c2cd97a [2021-11-07 02:01:36,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:01:36,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:01:36,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:01:36,257 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:01:36,258 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:01:36,259 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product39.cil.c [2021-11-07 02:01:36,331 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/data/d17e08573/d45e65314a7d4e23b262db1da1521462/FLAGbfb5420fd [2021-11-07 02:01:37,167 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:01:37,168 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/sv-benchmarks/c/product-lines/email_spec11_product39.cil.c [2021-11-07 02:01:37,195 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/data/d17e08573/d45e65314a7d4e23b262db1da1521462/FLAGbfb5420fd [2021-11-07 02:01:37,316 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/data/d17e08573/d45e65314a7d4e23b262db1da1521462 [2021-11-07 02:01:37,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:01:37,323 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:01:37,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:01:37,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:01:37,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:01:37,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:01:37" (1/1) ... [2021-11-07 02:01:37,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cac30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:37, skipping insertion in model container [2021-11-07 02:01:37,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:01:37" (1/1) ... [2021-11-07 02:01:37,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:01:37,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:01:37,881 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_070dfa48-96ac-461e-af1b-e6d82840136b/sv-benchmarks/c/product-lines/email_spec11_product39.cil.c[17959,17972] [2021-11-07 02:01:38,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:01:38,198 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:01:38,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:01:38,302 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_070dfa48-96ac-461e-af1b-e6d82840136b/sv-benchmarks/c/product-lines/email_spec11_product39.cil.c[17959,17972] [2021-11-07 02:01:38,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:01:38,435 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:01:38,491 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_070dfa48-96ac-461e-af1b-e6d82840136b/sv-benchmarks/c/product-lines/email_spec11_product39.cil.c[17959,17972] [2021-11-07 02:01:38,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:01:38,622 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:01:38,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:38 WrapperNode [2021-11-07 02:01:38,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:01:38,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:01:38,624 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:01:38,625 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:01:38,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:38" (1/1) ... [2021-11-07 02:01:38,695 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:38" (1/1) ... [2021-11-07 02:01:38,811 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:01:38,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:01:38,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:01:38,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:01:38,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:38" (1/1) ... [2021-11-07 02:01:38,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:38" (1/1) ... [2021-11-07 02:01:38,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:38" (1/1) ... [2021-11-07 02:01:38,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:38" (1/1) ... [2021-11-07 02:01:38,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:38" (1/1) ... [2021-11-07 02:01:38,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:38" (1/1) ... [2021-11-07 02:01:38,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:38" (1/1) ... [2021-11-07 02:01:38,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:01:38,949 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:01:38,949 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:01:38,949 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:01:38,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:38" (1/1) ... [2021-11-07 02:01:38,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:01:38,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:01:38,986 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:01:39,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:01:39,046 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 02:01:39,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:01:39,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:01:39,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:01:39,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:01:44,360 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:01:44,360 INFO L299 CfgBuilder]: Removed 373 assume(true) statements. [2021-11-07 02:01:44,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:01:44 BoogieIcfgContainer [2021-11-07 02:01:44,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:01:44,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:01:44,369 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:01:44,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:01:44,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:01:37" (1/3) ... [2021-11-07 02:01:44,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71dd721d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:01:44, skipping insertion in model container [2021-11-07 02:01:44,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:38" (2/3) ... [2021-11-07 02:01:44,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71dd721d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:01:44, skipping insertion in model container [2021-11-07 02:01:44,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:01:44" (3/3) ... [2021-11-07 02:01:44,376 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec11_product39.cil.c [2021-11-07 02:01:44,383 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:01:44,384 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 02:01:44,469 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:01:44,480 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:01:44,480 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 02:01:44,514 INFO L276 IsEmpty]: Start isEmpty. Operand has 548 states, 541 states have (on average 1.7634011090573012) internal successors, (954), 547 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:44,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 02:01:44,531 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:44,531 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:44,532 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:01:44,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:44,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1115525173, now seen corresponding path program 1 times [2021-11-07 02:01:44,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:44,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [267664462] [2021-11-07 02:01:44,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:44,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:44,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:44,562 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:44,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:01:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:45,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:01:45,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:45,249 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 02:01:45,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:45,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:45,370 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:45,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [267664462] [2021-11-07 02:01:45,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [267664462] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:45,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:45,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:01:45,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358773490] [2021-11-07 02:01:45,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:01:45,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:45,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:01:45,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:01:45,404 INFO L87 Difference]: Start difference. First operand has 548 states, 541 states have (on average 1.7634011090573012) internal successors, (954), 547 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:45,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:45,481 INFO L93 Difference]: Finished difference Result 811 states and 1385 transitions. [2021-11-07 02:01:45,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:01:45,483 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-07 02:01:45,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:45,501 INFO L225 Difference]: With dead ends: 811 [2021-11-07 02:01:45,501 INFO L226 Difference]: Without dead ends: 530 [2021-11-07 02:01:45,506 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:01:45,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-11-07 02:01:45,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 530. [2021-11-07 02:01:45,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 524 states have (on average 1.7461832061068703) internal successors, (915), 529 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:45,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 915 transitions. [2021-11-07 02:01:45,596 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 915 transitions. Word has length 41 [2021-11-07 02:01:45,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:45,596 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 915 transitions. [2021-11-07 02:01:45,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:45,597 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 915 transitions. [2021-11-07 02:01:45,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 02:01:45,602 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:45,602 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:45,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:45,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:45,803 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:01:45,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:45,804 INFO L85 PathProgramCache]: Analyzing trace with hash -502555757, now seen corresponding path program 1 times [2021-11-07 02:01:45,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:45,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [189844829] [2021-11-07 02:01:45,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:45,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:45,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:45,816 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:45,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:01:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:46,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:01:46,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:46,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:46,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:46,629 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:46,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [189844829] [2021-11-07 02:01:46,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [189844829] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:46,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:46,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:01:46,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038636857] [2021-11-07 02:01:46,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:01:46,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:46,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:01:46,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:01:46,634 INFO L87 Difference]: Start difference. First operand 530 states and 915 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:46,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:46,811 INFO L93 Difference]: Finished difference Result 1560 states and 2697 transitions. [2021-11-07 02:01:46,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:01:46,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-07 02:01:46,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:46,824 INFO L225 Difference]: With dead ends: 1560 [2021-11-07 02:01:46,825 INFO L226 Difference]: Without dead ends: 1045 [2021-11-07 02:01:46,832 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:01:46,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2021-11-07 02:01:46,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 529. [2021-11-07 02:01:46,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 523 states have (on average 1.739961759082218) internal successors, (910), 528 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:46,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 910 transitions. [2021-11-07 02:01:46,910 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 910 transitions. Word has length 42 [2021-11-07 02:01:46,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:46,910 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 910 transitions. [2021-11-07 02:01:46,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:46,911 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 910 transitions. [2021-11-07 02:01:46,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 02:01:46,915 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:46,916 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:46,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:47,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:47,132 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:01:47,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:47,133 INFO L85 PathProgramCache]: Analyzing trace with hash -298230035, now seen corresponding path program 1 times [2021-11-07 02:01:47,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:47,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557781357] [2021-11-07 02:01:47,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:47,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:47,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:47,138 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:47,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:01:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:47,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:01:47,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:47,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:47,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:47,910 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:47,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557781357] [2021-11-07 02:01:47,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557781357] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:47,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:47,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:01:47,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506373440] [2021-11-07 02:01:47,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:01:47,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:47,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:01:47,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:01:47,915 INFO L87 Difference]: Start difference. First operand 529 states and 910 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:48,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:48,251 INFO L93 Difference]: Finished difference Result 2033 states and 3502 transitions. [2021-11-07 02:01:48,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:01:48,251 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 02:01:48,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:48,266 INFO L225 Difference]: With dead ends: 2033 [2021-11-07 02:01:48,267 INFO L226 Difference]: Without dead ends: 1522 [2021-11-07 02:01:48,268 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:01:48,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2021-11-07 02:01:48,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 528. [2021-11-07 02:01:48,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 522 states have (on average 1.735632183908046) internal successors, (906), 527 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:48,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 906 transitions. [2021-11-07 02:01:48,318 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 906 transitions. Word has length 44 [2021-11-07 02:01:48,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:48,319 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 906 transitions. [2021-11-07 02:01:48,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:48,321 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 906 transitions. [2021-11-07 02:01:48,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 02:01:48,326 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:48,326 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:48,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:48,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:48,540 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:01:48,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:48,541 INFO L85 PathProgramCache]: Analyzing trace with hash 595737274, now seen corresponding path program 1 times [2021-11-07 02:01:48,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:48,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419962868] [2021-11-07 02:01:48,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:48,543 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:48,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:48,548 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:48,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:01:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:49,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:01:49,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:49,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:49,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:49,348 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:49,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419962868] [2021-11-07 02:01:49,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419962868] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:49,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:49,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:01:49,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600815193] [2021-11-07 02:01:49,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:01:49,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:49,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:01:49,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:01:49,357 INFO L87 Difference]: Start difference. First operand 528 states and 906 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:49,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:49,469 INFO L93 Difference]: Finished difference Result 1053 states and 1809 transitions. [2021-11-07 02:01:49,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:01:49,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 02:01:49,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:49,476 INFO L225 Difference]: With dead ends: 1053 [2021-11-07 02:01:49,476 INFO L226 Difference]: Without dead ends: 533 [2021-11-07 02:01:49,478 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:01:49,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-11-07 02:01:49,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 528. [2021-11-07 02:01:49,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 522 states have (on average 1.7298850574712643) internal successors, (903), 527 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:49,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 903 transitions. [2021-11-07 02:01:49,528 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 903 transitions. Word has length 45 [2021-11-07 02:01:49,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:49,529 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 903 transitions. [2021-11-07 02:01:49,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:49,529 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 903 transitions. [2021-11-07 02:01:49,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 02:01:49,531 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:49,531 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:49,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:49,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:49,752 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:01:49,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:49,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1338844923, now seen corresponding path program 1 times [2021-11-07 02:01:49,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:49,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098110670] [2021-11-07 02:01:49,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:49,756 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:49,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:49,758 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:49,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:01:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:50,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:01:50,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:50,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:50,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:50,595 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:50,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098110670] [2021-11-07 02:01:50,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098110670] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:50,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:50,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:01:50,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077181470] [2021-11-07 02:01:50,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:01:50,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:50,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:01:50,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:01:50,598 INFO L87 Difference]: Start difference. First operand 528 states and 903 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:50,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:50,995 INFO L93 Difference]: Finished difference Result 2020 states and 3478 transitions. [2021-11-07 02:01:50,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:01:50,996 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 02:01:50,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:51,008 INFO L225 Difference]: With dead ends: 2020 [2021-11-07 02:01:51,008 INFO L226 Difference]: Without dead ends: 1518 [2021-11-07 02:01:51,010 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:01:51,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-11-07 02:01:51,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 528. [2021-11-07 02:01:51,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 522 states have (on average 1.7241379310344827) internal successors, (900), 527 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:51,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 900 transitions. [2021-11-07 02:01:51,078 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 900 transitions. Word has length 46 [2021-11-07 02:01:51,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:51,081 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 900 transitions. [2021-11-07 02:01:51,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:51,081 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 900 transitions. [2021-11-07 02:01:51,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 02:01:51,084 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:51,085 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 02:01:51,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:51,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:51,309 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:01:51,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:51,310 INFO L85 PathProgramCache]: Analyzing trace with hash 557653098, now seen corresponding path program 1 times [2021-11-07 02:01:51,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:51,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996145563] [2021-11-07 02:01:51,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:51,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:51,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:51,313 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:51,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:01:51,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:51,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:01:51,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:52,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:52,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:52,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:52,167 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:52,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996145563] [2021-11-07 02:01:52,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996145563] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:52,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:52,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:01:52,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440224337] [2021-11-07 02:01:52,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:01:52,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:52,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:01:52,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:01:52,169 INFO L87 Difference]: Start difference. First operand 528 states and 900 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 02:01:52,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:52,282 INFO L93 Difference]: Finished difference Result 1275 states and 2165 transitions. [2021-11-07 02:01:52,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:01:52,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 02:01:52,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:52,291 INFO L225 Difference]: With dead ends: 1275 [2021-11-07 02:01:52,292 INFO L226 Difference]: Without dead ends: 1030 [2021-11-07 02:01:52,293 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:01:52,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-11-07 02:01:52,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 785. [2021-11-07 02:01:52,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 779 states have (on average 1.7625160462130938) internal successors, (1373), 784 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:52,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1373 transitions. [2021-11-07 02:01:52,370 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1373 transitions. Word has length 48 [2021-11-07 02:01:52,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:52,370 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 1373 transitions. [2021-11-07 02:01:52,370 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 02:01:52,370 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1373 transitions. [2021-11-07 02:01:52,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:01:52,373 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:52,373 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:52,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:52,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:52,588 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:01:52,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:52,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1095660487, now seen corresponding path program 1 times [2021-11-07 02:01:52,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:52,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2083670544] [2021-11-07 02:01:52,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:52,590 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:52,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:52,591 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:52,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:01:53,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:53,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:01:53,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:53,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:53,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:53,384 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:53,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2083670544] [2021-11-07 02:01:53,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2083670544] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:53,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:53,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:01:53,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632532610] [2021-11-07 02:01:53,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:53,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:53,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:53,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:53,387 INFO L87 Difference]: Start difference. First operand 785 states and 1373 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:53,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:53,507 INFO L93 Difference]: Finished difference Result 1936 states and 3385 transitions. [2021-11-07 02:01:53,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:53,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 02:01:53,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:53,517 INFO L225 Difference]: With dead ends: 1936 [2021-11-07 02:01:53,517 INFO L226 Difference]: Without dead ends: 1235 [2021-11-07 02:01:53,519 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:53,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2021-11-07 02:01:53,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 990. [2021-11-07 02:01:53,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 984 states have (on average 1.7774390243902438) internal successors, (1749), 989 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:53,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1749 transitions. [2021-11-07 02:01:53,616 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1749 transitions. Word has length 60 [2021-11-07 02:01:53,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:53,617 INFO L470 AbstractCegarLoop]: Abstraction has 990 states and 1749 transitions. [2021-11-07 02:01:53,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:53,617 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1749 transitions. [2021-11-07 02:01:53,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 02:01:53,619 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:53,620 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:53,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:53,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:53,836 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:01:53,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:53,837 INFO L85 PathProgramCache]: Analyzing trace with hash -275049286, now seen corresponding path program 1 times [2021-11-07 02:01:53,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:53,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164543246] [2021-11-07 02:01:53,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:53,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:53,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:53,839 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:53,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:01:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:54,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:01:54,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:54,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:54,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:54,729 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:54,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164543246] [2021-11-07 02:01:54,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164543246] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:54,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:54,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:01:54,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342255402] [2021-11-07 02:01:54,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:54,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:54,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:54,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:54,732 INFO L87 Difference]: Start difference. First operand 990 states and 1749 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:54,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:54,901 INFO L93 Difference]: Finished difference Result 2583 states and 4578 transitions. [2021-11-07 02:01:54,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:54,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 02:01:54,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:54,915 INFO L225 Difference]: With dead ends: 2583 [2021-11-07 02:01:54,915 INFO L226 Difference]: Without dead ends: 1685 [2021-11-07 02:01:54,917 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:54,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2021-11-07 02:01:55,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 1440. [2021-11-07 02:01:55,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1434 states have (on average 1.797071129707113) internal successors, (2577), 1439 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:55,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 2577 transitions. [2021-11-07 02:01:55,067 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 2577 transitions. Word has length 61 [2021-11-07 02:01:55,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:55,068 INFO L470 AbstractCegarLoop]: Abstraction has 1440 states and 2577 transitions. [2021-11-07 02:01:55,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:55,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 2577 transitions. [2021-11-07 02:01:55,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 02:01:55,072 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:55,072 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:55,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:55,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:55,290 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:01:55,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:55,290 INFO L85 PathProgramCache]: Analyzing trace with hash -352452917, now seen corresponding path program 1 times [2021-11-07 02:01:55,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:55,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057290601] [2021-11-07 02:01:55,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:55,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:55,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:55,292 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:55,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:01:55,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:55,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:01:55,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:56,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:56,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:56,284 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:56,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057290601] [2021-11-07 02:01:56,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057290601] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:56,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:56,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:01:56,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024938023] [2021-11-07 02:01:56,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:56,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:56,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:56,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:56,292 INFO L87 Difference]: Start difference. First operand 1440 states and 2577 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:56,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:56,534 INFO L93 Difference]: Finished difference Result 3913 states and 7031 transitions. [2021-11-07 02:01:56,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:56,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 02:01:56,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:56,553 INFO L225 Difference]: With dead ends: 3913 [2021-11-07 02:01:56,554 INFO L226 Difference]: Without dead ends: 2573 [2021-11-07 02:01:56,557 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:56,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2021-11-07 02:01:56,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 2328. [2021-11-07 02:01:56,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2322 states have (on average 1.813953488372093) internal successors, (4212), 2327 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:56,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 4212 transitions. [2021-11-07 02:01:56,808 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 4212 transitions. Word has length 62 [2021-11-07 02:01:56,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:56,809 INFO L470 AbstractCegarLoop]: Abstraction has 2328 states and 4212 transitions. [2021-11-07 02:01:56,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:56,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 4212 transitions. [2021-11-07 02:01:56,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 02:01:56,814 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:56,814 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:56,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:57,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:57,032 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:01:57,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:57,033 INFO L85 PathProgramCache]: Analyzing trace with hash 475042123, now seen corresponding path program 1 times [2021-11-07 02:01:57,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:57,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1269791518] [2021-11-07 02:01:57,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:57,034 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:57,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:57,036 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:57,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:01:57,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:57,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:01:57,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:57,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:57,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:58,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:58,060 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:58,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1269791518] [2021-11-07 02:01:58,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1269791518] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:58,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:58,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:01:58,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124594876] [2021-11-07 02:01:58,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:58,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:58,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:58,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:58,063 INFO L87 Difference]: Start difference. First operand 2328 states and 4212 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:58,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:58,382 INFO L93 Difference]: Finished difference Result 6313 states and 11455 transitions. [2021-11-07 02:01:58,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:58,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 02:01:58,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:58,414 INFO L225 Difference]: With dead ends: 6313 [2021-11-07 02:01:58,414 INFO L226 Difference]: Without dead ends: 4119 [2021-11-07 02:01:58,419 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:58,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4119 states. [2021-11-07 02:01:58,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4119 to 3874. [2021-11-07 02:01:58,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3874 states, 3868 states have (on average 1.8244570837642193) internal successors, (7057), 3873 states have internal predecessors, (7057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:58,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3874 states to 3874 states and 7057 transitions. [2021-11-07 02:01:58,780 INFO L78 Accepts]: Start accepts. Automaton has 3874 states and 7057 transitions. Word has length 63 [2021-11-07 02:01:58,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:58,781 INFO L470 AbstractCegarLoop]: Abstraction has 3874 states and 7057 transitions. [2021-11-07 02:01:58,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:58,781 INFO L276 IsEmpty]: Start isEmpty. Operand 3874 states and 7057 transitions. [2021-11-07 02:01:58,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:01:58,787 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:58,787 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:58,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:59,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:59,001 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:01:59,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:59,001 INFO L85 PathProgramCache]: Analyzing trace with hash 46039610, now seen corresponding path program 1 times [2021-11-07 02:01:59,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:59,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350148080] [2021-11-07 02:01:59,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:59,002 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:59,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:59,003 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:59,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:01:59,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:59,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:01:59,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:59,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:59,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:59,979 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:59,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350148080] [2021-11-07 02:01:59,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350148080] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:59,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:59,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:01:59,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464674081] [2021-11-07 02:01:59,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:59,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:59,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:59,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:59,981 INFO L87 Difference]: Start difference. First operand 3874 states and 7057 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:00,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:00,554 INFO L93 Difference]: Finished difference Result 10667 states and 19473 transitions. [2021-11-07 02:02:00,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:02:00,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 02:02:00,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:00,611 INFO L225 Difference]: With dead ends: 10667 [2021-11-07 02:02:00,611 INFO L226 Difference]: Without dead ends: 6961 [2021-11-07 02:02:00,618 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:00,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6961 states. [2021-11-07 02:02:01,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6961 to 6716. [2021-11-07 02:02:01,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6716 states, 6710 states have (on average 1.830402384500745) internal successors, (12282), 6715 states have internal predecessors, (12282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:01,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6716 states to 6716 states and 12282 transitions. [2021-11-07 02:02:01,245 INFO L78 Accepts]: Start accepts. Automaton has 6716 states and 12282 transitions. Word has length 64 [2021-11-07 02:02:01,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:01,247 INFO L470 AbstractCegarLoop]: Abstraction has 6716 states and 12282 transitions. [2021-11-07 02:02:01,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:01,247 INFO L276 IsEmpty]: Start isEmpty. Operand 6716 states and 12282 transitions. [2021-11-07 02:02:01,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:02:01,260 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:01,260 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:01,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:01,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:01,476 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:02:01,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:01,477 INFO L85 PathProgramCache]: Analyzing trace with hash -235445798, now seen corresponding path program 1 times [2021-11-07 02:02:01,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:01,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947312238] [2021-11-07 02:02:01,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:01,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:01,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:01,480 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:01,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:02:02,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:02,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:02:02,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:02,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:02,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:02,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:02,534 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:02,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947312238] [2021-11-07 02:02:02,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947312238] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:02,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:02,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:02:02,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6585075] [2021-11-07 02:02:02,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:02:02,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:02,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:02:02,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:02,537 INFO L87 Difference]: Start difference. First operand 6716 states and 12282 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:03,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:03,364 INFO L93 Difference]: Finished difference Result 19651 states and 35990 transitions. [2021-11-07 02:02:03,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:02:03,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 02:02:03,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:03,425 INFO L225 Difference]: With dead ends: 19651 [2021-11-07 02:02:03,426 INFO L226 Difference]: Without dead ends: 13107 [2021-11-07 02:02:03,436 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:03,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13107 states. [2021-11-07 02:02:04,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13107 to 12862. [2021-11-07 02:02:04,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12862 states, 12856 states have (on average 1.8328406969508402) internal successors, (23563), 12861 states have internal predecessors, (23563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:04,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12862 states to 12862 states and 23563 transitions. [2021-11-07 02:02:04,380 INFO L78 Accepts]: Start accepts. Automaton has 12862 states and 23563 transitions. Word has length 65 [2021-11-07 02:02:04,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:04,381 INFO L470 AbstractCegarLoop]: Abstraction has 12862 states and 23563 transitions. [2021-11-07 02:02:04,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:04,382 INFO L276 IsEmpty]: Start isEmpty. Operand 12862 states and 23563 transitions. [2021-11-07 02:02:04,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:02:04,390 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:04,390 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:04,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:04,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:04,609 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:02:04,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:04,610 INFO L85 PathProgramCache]: Analyzing trace with hash -632292918, now seen corresponding path program 1 times [2021-11-07 02:02:04,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:04,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1483492935] [2021-11-07 02:02:04,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:04,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:04,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:04,613 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:04,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:02:05,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:05,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:02:05,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:02:05,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:05,774 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:02:05,774 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:05,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1483492935] [2021-11-07 02:02:05,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1483492935] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:05,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:05,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:02:05,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706472278] [2021-11-07 02:02:05,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:02:05,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:05,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:02:05,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:02:05,777 INFO L87 Difference]: Start difference. First operand 12862 states and 23563 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:09,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:09,262 INFO L93 Difference]: Finished difference Result 31755 states and 58180 transitions. [2021-11-07 02:02:09,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:02:09,263 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 02:02:09,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:09,333 INFO L225 Difference]: With dead ends: 31755 [2021-11-07 02:02:09,333 INFO L226 Difference]: Without dead ends: 19186 [2021-11-07 02:02:09,351 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:02:09,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19186 states. [2021-11-07 02:02:10,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19186 to 12829. [2021-11-07 02:02:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12829 states, 12823 states have (on average 1.8272635108788895) internal successors, (23431), 12828 states have internal predecessors, (23431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:10,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12829 states to 12829 states and 23431 transitions. [2021-11-07 02:02:10,181 INFO L78 Accepts]: Start accepts. Automaton has 12829 states and 23431 transitions. Word has length 66 [2021-11-07 02:02:10,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:10,182 INFO L470 AbstractCegarLoop]: Abstraction has 12829 states and 23431 transitions. [2021-11-07 02:02:10,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:10,182 INFO L276 IsEmpty]: Start isEmpty. Operand 12829 states and 23431 transitions. [2021-11-07 02:02:10,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:02:10,188 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:10,188 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] [2021-11-07 02:02:10,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:10,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:10,405 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:02:10,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:10,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1614204501, now seen corresponding path program 1 times [2021-11-07 02:02:10,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:10,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716077814] [2021-11-07 02:02:10,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:10,406 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:10,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:10,407 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:10,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:02:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:11,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:02:11,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:11,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:11,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:11,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:11,357 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:11,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716077814] [2021-11-07 02:02:11,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716077814] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:11,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:11,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:02:11,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704120161] [2021-11-07 02:02:11,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:02:11,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:11,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:02:11,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:11,359 INFO L87 Difference]: Start difference. First operand 12829 states and 23431 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:12,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:12,639 INFO L93 Difference]: Finished difference Result 37694 states and 68920 transitions. [2021-11-07 02:02:12,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:02:12,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 02:02:12,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:12,701 INFO L225 Difference]: With dead ends: 37694 [2021-11-07 02:02:12,701 INFO L226 Difference]: Without dead ends: 25044 [2021-11-07 02:02:12,720 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:12,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25044 states. [2021-11-07 02:02:13,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25044 to 24799. [2021-11-07 02:02:13,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24799 states, 24793 states have (on average 1.8279353043197677) internal successors, (45320), 24798 states have internal predecessors, (45320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:13,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24799 states to 24799 states and 45320 transitions. [2021-11-07 02:02:13,920 INFO L78 Accepts]: Start accepts. Automaton has 24799 states and 45320 transitions. Word has length 66 [2021-11-07 02:02:13,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:13,920 INFO L470 AbstractCegarLoop]: Abstraction has 24799 states and 45320 transitions. [2021-11-07 02:02:13,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:13,921 INFO L276 IsEmpty]: Start isEmpty. Operand 24799 states and 45320 transitions. [2021-11-07 02:02:13,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:02:13,928 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:13,928 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 02:02:13,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:14,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:14,143 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:02:14,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:14,144 INFO L85 PathProgramCache]: Analyzing trace with hash -529235624, now seen corresponding path program 1 times [2021-11-07 02:02:14,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:14,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352337616] [2021-11-07 02:02:14,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:14,144 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:14,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:14,145 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:14,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:02:14,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:14,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:02:14,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:14,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:15,050 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:15,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352337616] [2021-11-07 02:02:15,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352337616] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:15,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:15,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:02:15,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72034307] [2021-11-07 02:02:15,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:02:15,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:15,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:02:15,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:15,052 INFO L87 Difference]: Start difference. First operand 24799 states and 45320 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 02:02:16,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:16,974 INFO L93 Difference]: Finished difference Result 68243 states and 124323 transitions. [2021-11-07 02:02:16,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:02:16,974 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 02:02:16,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:17,104 INFO L225 Difference]: With dead ends: 68243 [2021-11-07 02:02:17,105 INFO L226 Difference]: Without dead ends: 43670 [2021-11-07 02:02:17,150 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 02:02:17,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43670 states. [2021-11-07 02:02:19,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43670 to 43425. [2021-11-07 02:02:19,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43425 states, 43419 states have (on average 1.8161864621479076) internal successors, (78857), 43424 states have internal predecessors, (78857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:19,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43425 states to 43425 states and 78857 transitions. [2021-11-07 02:02:19,534 INFO L78 Accepts]: Start accepts. Automaton has 43425 states and 78857 transitions. Word has length 67 [2021-11-07 02:02:19,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:19,535 INFO L470 AbstractCegarLoop]: Abstraction has 43425 states and 78857 transitions. [2021-11-07 02:02:19,535 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 02:02:19,535 INFO L276 IsEmpty]: Start isEmpty. Operand 43425 states and 78857 transitions. [2021-11-07 02:02:19,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:02:19,543 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:19,543 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] [2021-11-07 02:02:19,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:19,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:19,758 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:02:19,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:19,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1742169796, now seen corresponding path program 1 times [2021-11-07 02:02:19,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:19,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [665219290] [2021-11-07 02:02:19,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:19,759 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:19,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:19,760 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:19,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:02:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:20,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:02:20,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:20,625 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:02:20,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:02:20,843 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:20,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [665219290] [2021-11-07 02:02:20,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [665219290] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:20,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:20,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:02:20,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747721296] [2021-11-07 02:02:20,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:02:20,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:20,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:02:20,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:02:20,845 INFO L87 Difference]: Start difference. First operand 43425 states and 78857 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:28,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:28,118 INFO L93 Difference]: Finished difference Result 168980 states and 306750 transitions. [2021-11-07 02:02:28,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:02:28,119 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 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 02:02:28,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:28,643 INFO L225 Difference]: With dead ends: 168980 [2021-11-07 02:02:28,643 INFO L226 Difference]: Without dead ends: 125847 [2021-11-07 02:02:28,727 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:02:28,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125847 states. [2021-11-07 02:02:32,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125847 to 43167. [2021-11-07 02:02:32,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43167 states, 43161 states have (on average 1.803132457542689) internal successors, (77825), 43166 states have internal predecessors, (77825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:32,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43167 states to 43167 states and 77825 transitions. [2021-11-07 02:02:32,311 INFO L78 Accepts]: Start accepts. Automaton has 43167 states and 77825 transitions. Word has length 68 [2021-11-07 02:02:32,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:32,312 INFO L470 AbstractCegarLoop]: Abstraction has 43167 states and 77825 transitions. [2021-11-07 02:02:32,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:32,312 INFO L276 IsEmpty]: Start isEmpty. Operand 43167 states and 77825 transitions. [2021-11-07 02:02:32,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:02:32,320 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:32,321 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:32,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:32,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:32,536 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:02:32,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:32,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1318713626, now seen corresponding path program 1 times [2021-11-07 02:02:32,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:32,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1870693741] [2021-11-07 02:02:32,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:32,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:32,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:32,538 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:32,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:02:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:33,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:02:33,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:33,602 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:33,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:33,789 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:33,789 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:33,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1870693741] [2021-11-07 02:02:33,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1870693741] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:33,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:33,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:02:33,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528464720] [2021-11-07 02:02:33,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:02:33,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:33,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:02:33,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:02:33,793 INFO L87 Difference]: Start difference. First operand 43167 states and 77825 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:36,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:36,062 INFO L93 Difference]: Finished difference Result 86281 states and 155543 transitions. [2021-11-07 02:02:36,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:02:36,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 02:02:36,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:36,170 INFO L225 Difference]: With dead ends: 86281 [2021-11-07 02:02:36,170 INFO L226 Difference]: Without dead ends: 43412 [2021-11-07 02:02:36,212 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:02:36,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43412 states. [2021-11-07 02:02:38,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43412 to 43167. [2021-11-07 02:02:38,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43167 states, 43161 states have (on average 1.800166817265587) internal successors, (77697), 43166 states have internal predecessors, (77697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:38,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43167 states to 43167 states and 77697 transitions. [2021-11-07 02:02:38,681 INFO L78 Accepts]: Start accepts. Automaton has 43167 states and 77697 transitions. Word has length 68 [2021-11-07 02:02:38,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:38,681 INFO L470 AbstractCegarLoop]: Abstraction has 43167 states and 77697 transitions. [2021-11-07 02:02:38,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:38,681 INFO L276 IsEmpty]: Start isEmpty. Operand 43167 states and 77697 transitions. [2021-11-07 02:02:38,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:02:38,688 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:38,689 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 02:02:38,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:38,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:38,903 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:02:38,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:38,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1749323367, now seen corresponding path program 1 times [2021-11-07 02:02:38,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:38,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [427780005] [2021-11-07 02:02:38,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:38,904 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:38,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:38,905 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:38,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070dfa48-96ac-461e-af1b-e6d82840136b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:02:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:39,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:02:39,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:39,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:39,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:39,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:39,960 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:39,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [427780005] [2021-11-07 02:02:39,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [427780005] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:39,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:39,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:02:39,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571777871] [2021-11-07 02:02:39,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:02:39,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:39,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:02:39,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:39,962 INFO L87 Difference]: Start difference. First operand 43167 states and 77697 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 02:02:43,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:43,732 INFO L93 Difference]: Finished difference Result 121011 states and 217569 transitions. [2021-11-07 02:02:43,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:02:43,733 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 02:02:43,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:43,867 INFO L225 Difference]: With dead ends: 121011 [2021-11-07 02:02:43,867 INFO L226 Difference]: Without dead ends: 78102 [2021-11-07 02:02:43,904 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 02:02:44,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78102 states.