./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8 --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 ef15c4790969d8e640b2241771e44174daa41407 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8 --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 ef15c4790969d8e640b2241771e44174daa41407 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:01:04,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:01:04,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:01:04,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:01:04,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:01:04,845 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:01:04,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:01:04,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:01:04,854 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:01:04,856 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:01:04,857 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:01:04,858 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:01:04,859 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:01:04,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:01:04,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:01:04,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:01:04,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:01:04,871 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:01:04,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:01:04,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:01:04,884 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:01:04,886 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:01:04,889 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:01:04,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:01:04,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:01:04,905 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:01:04,906 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:01:04,907 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:01:04,909 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:01:04,911 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:01:04,913 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:01:04,914 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:01:04,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:01:04,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:01:04,920 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:01:04,921 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:01:04,922 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:01:04,922 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:01:04,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:01:04,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:01:04,925 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:01:04,926 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 08:01:04,990 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:01:04,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:01:04,997 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:01:04,997 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:01:04,997 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:01:04,998 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:01:04,998 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 08:01:04,998 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:01:04,999 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:01:04,999 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 08:01:05,007 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 08:01:05,008 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:01:05,008 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 08:01:05,009 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 08:01:05,009 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 08:01:05,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:01:05,010 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:01:05,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 08:01:05,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:01:05,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:01:05,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:01:05,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:01:05,012 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:01:05,012 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:01:05,013 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:01:05,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:01:05,013 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:01:05,014 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:01:05,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:01:05,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:01:05,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:01:05,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:01:05,017 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:01:05,018 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:01:05,018 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 08:01:05,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 08:01:05,018 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:01:05,019 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:01:05,019 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:01:05,019 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef15c4790969d8e640b2241771e44174daa41407 [2021-10-13 08:01:05,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:01:05,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:01:05,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:01:05,357 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:01:05,358 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:01:05,360 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c [2021-10-13 08:01:05,459 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/data/1e3cef836/a82a44805f964e82b8a018ed76d13038/FLAGa90adc213 [2021-10-13 08:01:06,178 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:01:06,180 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c [2021-10-13 08:01:06,200 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/data/1e3cef836/a82a44805f964e82b8a018ed76d13038/FLAGa90adc213 [2021-10-13 08:01:06,486 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/data/1e3cef836/a82a44805f964e82b8a018ed76d13038 [2021-10-13 08:01:06,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:01:06,491 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:01:06,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:01:06,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:01:06,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:01:06,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:01:06" (1/1) ... [2021-10-13 08:01:06,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@638b0522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:06, skipping insertion in model container [2021-10-13 08:01:06,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:01:06" (1/1) ... [2021-10-13 08:01:06,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:01:06,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:01:06,763 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[1123,1136] [2021-10-13 08:01:06,780 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[1338,1351] [2021-10-13 08:01:06,789 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[1654,1667] [2021-10-13 08:01:06,791 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[1869,1882] [2021-10-13 08:01:06,794 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[2402,2415] [2021-10-13 08:01:06,797 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[2617,2630] [2021-10-13 08:01:06,800 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[2919,2932] [2021-10-13 08:01:06,802 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[3134,3147] [2021-10-13 08:01:06,805 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[3404,3417] [2021-10-13 08:01:06,807 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[3622,3635] [2021-10-13 08:01:06,811 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[4106,4119] [2021-10-13 08:01:06,813 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[4324,4337] [2021-10-13 08:01:06,816 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[4820,4833] [2021-10-13 08:01:06,819 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[5221,5234] [2021-10-13 08:01:06,822 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[5439,5452] [2021-10-13 08:01:06,824 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[5881,5894] [2021-10-13 08:01:06,827 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[6099,6112] [2021-10-13 08:01:06,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:01:06,841 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:01:06,861 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[1123,1136] [2021-10-13 08:01:06,863 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[1338,1351] [2021-10-13 08:01:06,865 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[1654,1667] [2021-10-13 08:01:06,868 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[1869,1882] [2021-10-13 08:01:06,871 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[2402,2415] [2021-10-13 08:01:06,873 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[2617,2630] [2021-10-13 08:01:06,876 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[2919,2932] [2021-10-13 08:01:06,878 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[3134,3147] [2021-10-13 08:01:06,880 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[3404,3417] [2021-10-13 08:01:06,883 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[3622,3635] [2021-10-13 08:01:06,887 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[4106,4119] [2021-10-13 08:01:06,889 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[4324,4337] [2021-10-13 08:01:06,892 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[4820,4833] [2021-10-13 08:01:06,895 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[5221,5234] [2021-10-13 08:01:06,896 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[5439,5452] [2021-10-13 08:01:06,899 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[5881,5894] [2021-10-13 08:01:06,901 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[6099,6112] [2021-10-13 08:01:06,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:01:06,929 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:01:06,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:06 WrapperNode [2021-10-13 08:01:06,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:01:06,938 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:01:06,939 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:01:06,939 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:01:06,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:06" (1/1) ... [2021-10-13 08:01:06,969 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:06" (1/1) ... [2021-10-13 08:01:07,018 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:01:07,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:01:07,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:01:07,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:01:07,028 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:06" (1/1) ... [2021-10-13 08:01:07,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:06" (1/1) ... [2021-10-13 08:01:07,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:06" (1/1) ... [2021-10-13 08:01:07,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:06" (1/1) ... [2021-10-13 08:01:07,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:06" (1/1) ... [2021-10-13 08:01:07,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:06" (1/1) ... [2021-10-13 08:01:07,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:06" (1/1) ... [2021-10-13 08:01:07,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:01:07,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:01:07,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:01:07,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:01:07,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:06" (1/1) ... [2021-10-13 08:01:07,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:01:07,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:01:07,106 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:01:07,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:01:07,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 08:01:07,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:01:07,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:01:07,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:01:07,723 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:01:07,724 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-13 08:01:07,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:01:07 BoogieIcfgContainer [2021-10-13 08:01:07,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:01:07,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:01:07,729 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:01:07,740 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:01:07,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:01:06" (1/3) ... [2021-10-13 08:01:07,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@111c08f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:01:07, skipping insertion in model container [2021-10-13 08:01:07,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:06" (2/3) ... [2021-10-13 08:01:07,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@111c08f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:01:07, skipping insertion in model container [2021-10-13 08:01:07,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:01:07" (3/3) ... [2021-10-13 08:01:07,744 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i.v+nlh-reducer.c [2021-10-13 08:01:07,749 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:01:07,750 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2021-10-13 08:01:07,799 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:01:07,806 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, mConcurrency=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 [2021-10-13 08:01:07,806 INFO L340 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2021-10-13 08:01:07,825 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 51 states have (on average 1.8823529411764706) internal successors, (96), 68 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:07,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 08:01:07,832 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:07,832 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:07,833 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:07,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:07,841 INFO L82 PathProgramCache]: Analyzing trace with hash 2133700231, now seen corresponding path program 1 times [2021-10-13 08:01:07,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:01:07,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358273372] [2021-10-13 08:01:07,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:07,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:01:07,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:08,106 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:01:08,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358273372] [2021-10-13 08:01:08,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358273372] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:08,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:08,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 08:01:08,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717071099] [2021-10-13 08:01:08,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:01:08,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:01:08,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:01:08,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:01:08,145 INFO L87 Difference]: Start difference. First operand has 69 states, 51 states have (on average 1.8823529411764706) internal successors, (96), 68 states have internal predecessors, (96), 0 states have call successors, (0), 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 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:08,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:08,366 INFO L93 Difference]: Finished difference Result 120 states and 161 transitions. [2021-10-13 08:01:08,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:01:08,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-10-13 08:01:08,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:08,385 INFO L225 Difference]: With dead ends: 120 [2021-10-13 08:01:08,386 INFO L226 Difference]: Without dead ends: 108 [2021-10-13 08:01:08,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:01:08,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-13 08:01:08,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 64. [2021-10-13 08:01:08,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 63 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) [2021-10-13 08:01:08,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-10-13 08:01:08,449 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 7 [2021-10-13 08:01:08,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:08,450 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-10-13 08:01:08,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:08,450 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-10-13 08:01:08,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 08:01:08,452 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:08,452 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:08,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 08:01:08,455 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:08,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:08,459 INFO L82 PathProgramCache]: Analyzing trace with hash 2130064740, now seen corresponding path program 1 times [2021-10-13 08:01:08,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:01:08,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202671743] [2021-10-13 08:01:08,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:08,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:01:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:08,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:08,619 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:01:08,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202671743] [2021-10-13 08:01:08,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202671743] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:08,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:08,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 08:01:08,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117856013] [2021-10-13 08:01:08,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:01:08,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:01:08,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:01:08,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:01:08,633 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:08,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:08,732 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2021-10-13 08:01:08,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:01:08,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-10-13 08:01:08,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:08,734 INFO L225 Difference]: With dead ends: 64 [2021-10-13 08:01:08,734 INFO L226 Difference]: Without dead ends: 62 [2021-10-13 08:01:08,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:01:08,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-13 08:01:08,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-13 08:01:08,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 61 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) [2021-10-13 08:01:08,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-10-13 08:01:08,744 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 7 [2021-10-13 08:01:08,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:08,744 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-10-13 08:01:08,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:08,745 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-10-13 08:01:08,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 08:01:08,746 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:08,746 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:08,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 08:01:08,747 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:08,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:08,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1607501556, now seen corresponding path program 1 times [2021-10-13 08:01:08,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:01:08,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063267661] [2021-10-13 08:01:08,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:08,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:01:08,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:08,813 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:01:08,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063267661] [2021-10-13 08:01:08,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063267661] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:08,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:08,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 08:01:08,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638866746] [2021-10-13 08:01:08,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:01:08,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:01:08,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:01:08,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:01:08,816 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:08,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:08,925 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2021-10-13 08:01:08,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:01:08,926 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-10-13 08:01:08,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:08,928 INFO L225 Difference]: With dead ends: 68 [2021-10-13 08:01:08,928 INFO L226 Difference]: Without dead ends: 66 [2021-10-13 08:01:08,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:01:08,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-13 08:01:08,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-10-13 08:01:08,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.38) internal successors, (69), 64 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:08,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2021-10-13 08:01:08,959 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 8 [2021-10-13 08:01:08,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:08,960 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2021-10-13 08:01:08,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:08,960 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2021-10-13 08:01:08,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 08:01:08,961 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:08,961 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:08,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 08:01:08,963 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:08,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:08,964 INFO L82 PathProgramCache]: Analyzing trace with hash -448408979, now seen corresponding path program 1 times [2021-10-13 08:01:08,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:01:08,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108749753] [2021-10-13 08:01:08,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:08,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:01:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:09,084 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:01:09,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108749753] [2021-10-13 08:01:09,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108749753] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:09,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:09,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 08:01:09,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867682667] [2021-10-13 08:01:09,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 08:01:09,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:01:09,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 08:01:09,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:01:09,090 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:09,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:09,214 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2021-10-13 08:01:09,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:01:09,215 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-10-13 08:01:09,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:09,220 INFO L225 Difference]: With dead ends: 66 [2021-10-13 08:01:09,221 INFO L226 Difference]: Without dead ends: 64 [2021-10-13 08:01:09,221 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:01:09,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-13 08:01:09,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-10-13 08:01:09,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 62 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) [2021-10-13 08:01:09,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2021-10-13 08:01:09,246 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 10 [2021-10-13 08:01:09,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:09,247 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2021-10-13 08:01:09,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:09,248 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2021-10-13 08:01:09,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 08:01:09,249 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:09,249 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:09,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 08:01:09,250 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:09,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:09,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1379104200, now seen corresponding path program 1 times [2021-10-13 08:01:09,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:01:09,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984825557] [2021-10-13 08:01:09,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:09,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:01:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:09,353 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:01:09,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984825557] [2021-10-13 08:01:09,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984825557] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:09,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:09,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 08:01:09,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223885969] [2021-10-13 08:01:09,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 08:01:09,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:01:09,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 08:01:09,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:01:09,363 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:09,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:09,481 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2021-10-13 08:01:09,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:01:09,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-10-13 08:01:09,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:09,484 INFO L225 Difference]: With dead ends: 64 [2021-10-13 08:01:09,484 INFO L226 Difference]: Without dead ends: 62 [2021-10-13 08:01:09,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:01:09,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-13 08:01:09,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-10-13 08:01:09,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 60 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) [2021-10-13 08:01:09,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2021-10-13 08:01:09,508 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 10 [2021-10-13 08:01:09,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:09,509 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2021-10-13 08:01:09,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:09,510 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2021-10-13 08:01:09,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 08:01:09,511 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:09,512 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:09,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 08:01:09,512 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:09,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:09,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1015772272, now seen corresponding path program 1 times [2021-10-13 08:01:09,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:01:09,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930883250] [2021-10-13 08:01:09,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:09,516 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:01:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:09,610 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:01:09,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930883250] [2021-10-13 08:01:09,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930883250] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:09,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:09,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 08:01:09,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570068470] [2021-10-13 08:01:09,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:01:09,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:01:09,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:01:09,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:01:09,614 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:09,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:09,691 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-10-13 08:01:09,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:01:09,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-10-13 08:01:09,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:09,693 INFO L225 Difference]: With dead ends: 62 [2021-10-13 08:01:09,693 INFO L226 Difference]: Without dead ends: 58 [2021-10-13 08:01:09,694 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:01:09,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-13 08:01:09,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-10-13 08:01:09,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 56 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) [2021-10-13 08:01:09,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-10-13 08:01:09,705 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 11 [2021-10-13 08:01:09,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:09,705 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-10-13 08:01:09,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:09,706 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-10-13 08:01:09,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 08:01:09,707 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:09,708 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:09,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 08:01:09,708 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:09,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:09,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1015281714, now seen corresponding path program 1 times [2021-10-13 08:01:09,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:01:09,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504577492] [2021-10-13 08:01:09,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:09,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:01:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:09,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:09,810 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:01:09,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504577492] [2021-10-13 08:01:09,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504577492] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:09,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:09,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 08:01:09,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779439532] [2021-10-13 08:01:09,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 08:01:09,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:01:09,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 08:01:09,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:01:09,813 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:09,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:09,957 INFO L93 Difference]: Finished difference Result 99 states and 106 transitions. [2021-10-13 08:01:09,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:01:09,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-10-13 08:01:09,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:09,959 INFO L225 Difference]: With dead ends: 99 [2021-10-13 08:01:09,959 INFO L226 Difference]: Without dead ends: 97 [2021-10-13 08:01:09,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:01:09,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-10-13 08:01:09,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 55. [2021-10-13 08:01:09,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 54 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:09,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2021-10-13 08:01:09,982 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 11 [2021-10-13 08:01:09,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:09,983 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2021-10-13 08:01:09,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:09,983 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2021-10-13 08:01:09,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 08:01:09,985 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:09,985 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:09,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 08:01:09,985 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:09,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:09,987 INFO L82 PathProgramCache]: Analyzing trace with hash 197446834, now seen corresponding path program 1 times [2021-10-13 08:01:09,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:01:09,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230091028] [2021-10-13 08:01:09,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:09,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:01:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:10,067 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:01:10,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230091028] [2021-10-13 08:01:10,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230091028] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:10,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:10,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 08:01:10,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730663122] [2021-10-13 08:01:10,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:01:10,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:01:10,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:01:10,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:01:10,078 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:10,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:10,190 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2021-10-13 08:01:10,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:01:10,191 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-10-13 08:01:10,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:10,192 INFO L225 Difference]: With dead ends: 56 [2021-10-13 08:01:10,192 INFO L226 Difference]: Without dead ends: 52 [2021-10-13 08:01:10,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:01:10,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-13 08:01:10,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-10-13 08:01:10,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:10,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-10-13 08:01:10,197 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 11 [2021-10-13 08:01:10,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:10,197 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-10-13 08:01:10,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:10,198 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-10-13 08:01:10,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 08:01:10,198 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:10,199 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:10,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 08:01:10,199 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:10,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:10,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1408957852, now seen corresponding path program 1 times [2021-10-13 08:01:10,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:01:10,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142620601] [2021-10-13 08:01:10,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:10,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:01:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:10,387 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:01:10,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142620601] [2021-10-13 08:01:10,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142620601] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:10,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:10,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 08:01:10,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339332247] [2021-10-13 08:01:10,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:01:10,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:01:10,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:01:10,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:01:10,393 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:10,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:10,590 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2021-10-13 08:01:10,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 08:01:10,591 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-10-13 08:01:10,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:10,592 INFO L225 Difference]: With dead ends: 117 [2021-10-13 08:01:10,592 INFO L226 Difference]: Without dead ends: 115 [2021-10-13 08:01:10,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:01:10,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-13 08:01:10,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 56. [2021-10-13 08:01:10,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.326086956521739) internal successors, (61), 55 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) [2021-10-13 08:01:10,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2021-10-13 08:01:10,602 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 12 [2021-10-13 08:01:10,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:10,603 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2021-10-13 08:01:10,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:10,604 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2021-10-13 08:01:10,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 08:01:10,605 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:10,605 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:10,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-13 08:01:10,605 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:10,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:10,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1842939021, now seen corresponding path program 1 times [2021-10-13 08:01:10,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:01:10,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830294261] [2021-10-13 08:01:10,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:10,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:01:10,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:10,673 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:01:10,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830294261] [2021-10-13 08:01:10,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830294261] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:10,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:10,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 08:01:10,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908384947] [2021-10-13 08:01:10,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 08:01:10,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:01:10,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 08:01:10,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:01:10,676 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:10,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:10,759 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2021-10-13 08:01:10,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:01:10,759 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-10-13 08:01:10,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:10,761 INFO L225 Difference]: With dead ends: 73 [2021-10-13 08:01:10,761 INFO L226 Difference]: Without dead ends: 71 [2021-10-13 08:01:10,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:01:10,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-13 08:01:10,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 54. [2021-10-13 08:01:10,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 53 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:10,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-10-13 08:01:10,765 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 12 [2021-10-13 08:01:10,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:10,766 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-10-13 08:01:10,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:10,766 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-10-13 08:01:10,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 08:01:10,771 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:10,771 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:10,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-13 08:01:10,771 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:10,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:10,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1844662925, now seen corresponding path program 1 times [2021-10-13 08:01:10,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:01:10,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076989037] [2021-10-13 08:01:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:10,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:01:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:10,844 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:01:10,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076989037] [2021-10-13 08:01:10,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076989037] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:10,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:10,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 08:01:10,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752019381] [2021-10-13 08:01:10,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 08:01:10,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:01:10,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 08:01:10,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:01:10,848 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:10,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:10,937 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2021-10-13 08:01:10,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:01:10,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-10-13 08:01:10,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:10,939 INFO L225 Difference]: With dead ends: 54 [2021-10-13 08:01:10,939 INFO L226 Difference]: Without dead ends: 52 [2021-10-13 08:01:10,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:01:10,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-13 08:01:10,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-10-13 08:01:10,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 51 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:10,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2021-10-13 08:01:10,960 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 12 [2021-10-13 08:01:10,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:10,960 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2021-10-13 08:01:10,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:10,961 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2021-10-13 08:01:10,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 08:01:10,961 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:10,962 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:10,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-13 08:01:10,962 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:10,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:10,963 INFO L82 PathProgramCache]: Analyzing trace with hash -734819501, now seen corresponding path program 1 times [2021-10-13 08:01:10,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:01:10,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208373334] [2021-10-13 08:01:10,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:10,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:01:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:11,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:11,134 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:01:11,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208373334] [2021-10-13 08:01:11,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208373334] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:11,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:11,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 08:01:11,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655912564] [2021-10-13 08:01:11,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:01:11,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:01:11,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:01:11,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:01:11,136 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:11,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:11,253 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2021-10-13 08:01:11,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 08:01:11,254 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-10-13 08:01:11,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:11,256 INFO L225 Difference]: With dead ends: 77 [2021-10-13 08:01:11,256 INFO L226 Difference]: Without dead ends: 75 [2021-10-13 08:01:11,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:01:11,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-13 08:01:11,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 52. [2021-10-13 08:01:11,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 51 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:11,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2021-10-13 08:01:11,261 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 13 [2021-10-13 08:01:11,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:11,262 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2021-10-13 08:01:11,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:11,262 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2021-10-13 08:01:11,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 08:01:11,263 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:11,263 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:11,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-13 08:01:11,263 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:11,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:11,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1296538901, now seen corresponding path program 1 times [2021-10-13 08:01:11,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:01:11,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729464120] [2021-10-13 08:01:11,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:11,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:01:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:11,379 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:01:11,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729464120] [2021-10-13 08:01:11,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729464120] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:11,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:11,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 08:01:11,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798740133] [2021-10-13 08:01:11,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:01:11,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:01:11,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:01:11,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:01:11,382 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:11,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:11,519 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2021-10-13 08:01:11,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 08:01:11,519 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-10-13 08:01:11,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:11,520 INFO L225 Difference]: With dead ends: 91 [2021-10-13 08:01:11,520 INFO L226 Difference]: Without dead ends: 89 [2021-10-13 08:01:11,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:01:11,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-13 08:01:11,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 60. [2021-10-13 08:01:11,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 59 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) [2021-10-13 08:01:11,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2021-10-13 08:01:11,526 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 13 [2021-10-13 08:01:11,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:11,526 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2021-10-13 08:01:11,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:11,527 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2021-10-13 08:01:11,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 08:01:11,527 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:11,527 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:11,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-13 08:01:11,528 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:11,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:11,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1298086046, now seen corresponding path program 1 times [2021-10-13 08:01:11,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:01:11,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564700482] [2021-10-13 08:01:11,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:11,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:01:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:11,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:11,564 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:01:11,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564700482] [2021-10-13 08:01:11,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564700482] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:11,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:11,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 08:01:11,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620293196] [2021-10-13 08:01:11,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 08:01:11,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:01:11,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 08:01:11,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:01:11,567 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:11,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:11,704 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2021-10-13 08:01:11,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:01:11,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-10-13 08:01:11,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:11,705 INFO L225 Difference]: With dead ends: 80 [2021-10-13 08:01:11,705 INFO L226 Difference]: Without dead ends: 78 [2021-10-13 08:01:11,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:01:11,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-13 08:01:11,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2021-10-13 08:01:11,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 57 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) [2021-10-13 08:01:11,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2021-10-13 08:01:11,711 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 13 [2021-10-13 08:01:11,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:11,712 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2021-10-13 08:01:11,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:11,712 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2021-10-13 08:01:11,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 08:01:11,712 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:11,713 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:11,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-13 08:01:11,728 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:11,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:11,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1349979981, now seen corresponding path program 1 times [2021-10-13 08:01:11,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:01:11,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139314229] [2021-10-13 08:01:11,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:11,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:01:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:11,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:11,811 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:01:11,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139314229] [2021-10-13 08:01:11,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139314229] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:11,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:11,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 08:01:11,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88209648] [2021-10-13 08:01:11,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:01:11,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:01:11,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:01:11,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:01:11,813 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:11,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:11,970 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2021-10-13 08:01:11,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 08:01:11,971 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-10-13 08:01:11,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:11,972 INFO L225 Difference]: With dead ends: 69 [2021-10-13 08:01:11,972 INFO L226 Difference]: Without dead ends: 65 [2021-10-13 08:01:11,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:01:11,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-13 08:01:11,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2021-10-13 08:01:11,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 58 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) [2021-10-13 08:01:11,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-10-13 08:01:11,976 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 13 [2021-10-13 08:01:11,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:11,977 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-10-13 08:01:11,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:11,977 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-10-13 08:01:11,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 08:01:11,978 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:11,978 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:11,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-13 08:01:11,978 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:11,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:11,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1585965895, now seen corresponding path program 1 times [2021-10-13 08:01:11,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:01:11,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10036748] [2021-10-13 08:01:11,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:11,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:01:11,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:12,073 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:01:12,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10036748] [2021-10-13 08:01:12,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10036748] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:12,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:12,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 08:01:12,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182912185] [2021-10-13 08:01:12,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:01:12,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:01:12,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:01:12,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:01:12,079 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:12,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:12,219 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2021-10-13 08:01:12,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 08:01:12,220 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-10-13 08:01:12,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:12,221 INFO L225 Difference]: With dead ends: 86 [2021-10-13 08:01:12,222 INFO L226 Difference]: Without dead ends: 84 [2021-10-13 08:01:12,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:01:12,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-13 08:01:12,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 62. [2021-10-13 08:01:12,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 55 states have (on average 1.2545454545454546) internal successors, (69), 61 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:12,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2021-10-13 08:01:12,236 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 14 [2021-10-13 08:01:12,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:12,236 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2021-10-13 08:01:12,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:12,236 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2021-10-13 08:01:12,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 08:01:12,237 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:12,237 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:12,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-13 08:01:12,237 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:12,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:12,238 INFO L82 PathProgramCache]: Analyzing trace with hash 433495416, now seen corresponding path program 1 times [2021-10-13 08:01:12,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:01:12,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483932160] [2021-10-13 08:01:12,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:12,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:01:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:12,329 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:01:12,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483932160] [2021-10-13 08:01:12,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483932160] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:12,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:12,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 08:01:12,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459450232] [2021-10-13 08:01:12,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:01:12,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:01:12,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:01:12,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:01:12,332 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:12,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:12,369 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2021-10-13 08:01:12,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:01:12,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-10-13 08:01:12,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:12,371 INFO L225 Difference]: With dead ends: 62 [2021-10-13 08:01:12,371 INFO L226 Difference]: Without dead ends: 60 [2021-10-13 08:01:12,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:01:12,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-13 08:01:12,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-10-13 08:01:12,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 59 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) [2021-10-13 08:01:12,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2021-10-13 08:01:12,385 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 15 [2021-10-13 08:01:12,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:12,385 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2021-10-13 08:01:12,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:12,386 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2021-10-13 08:01:12,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 08:01:12,386 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:12,386 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:12,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-13 08:01:12,387 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:12,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:12,388 INFO L82 PathProgramCache]: Analyzing trace with hash 553460123, now seen corresponding path program 1 times [2021-10-13 08:01:12,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:01:12,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330551606] [2021-10-13 08:01:12,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:12,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:01:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:12,447 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:01:12,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330551606] [2021-10-13 08:01:12,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330551606] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:12,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:12,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 08:01:12,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214099137] [2021-10-13 08:01:12,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:01:12,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:01:12,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:01:12,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:01:12,452 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:12,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:12,506 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2021-10-13 08:01:12,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:01:12,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-10-13 08:01:12,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:12,508 INFO L225 Difference]: With dead ends: 60 [2021-10-13 08:01:12,508 INFO L226 Difference]: Without dead ends: 56 [2021-10-13 08:01:12,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:01:12,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-13 08:01:12,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-10-13 08:01:12,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 55 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) [2021-10-13 08:01:12,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-10-13 08:01:12,516 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 16 [2021-10-13 08:01:12,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:12,518 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-10-13 08:01:12,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:12,519 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-10-13 08:01:12,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 08:01:12,520 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:12,520 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:12,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-13 08:01:12,521 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:12,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:12,521 INFO L82 PathProgramCache]: Analyzing trace with hash -995706929, now seen corresponding path program 1 times [2021-10-13 08:01:12,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:01:12,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678884181] [2021-10-13 08:01:12,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:12,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:01:12,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:12,661 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:01:12,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678884181] [2021-10-13 08:01:12,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678884181] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 08:01:12,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141801565] [2021-10-13 08:01:12,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:12,662 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:01:12,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:01:12,664 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:01:12,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 08:01:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:12,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 08:01:12,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:13,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 08:01:13,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141801565] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:13,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1153311264] [2021-10-13 08:01:13,425 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-10-13 08:01:13,426 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 08:01:13,431 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 08:01:13,438 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 08:01:13,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 08:01:13,473 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:01:13,475 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:01:13,476 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:01:13,476 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 08:01:13,477 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:01:13,479 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:01:13,479 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 08:01:13,482 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-10-13 08:01:13,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:01:13,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:01:13,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:01:13,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-13 08:01:13,546 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:01:13,546 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 08:01:13,547 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:01:13,547 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 08:01:13,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 08:01:13,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:01:13,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:01:13,560 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:01:13,563 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-10-13 08:01:13,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 08:01:13,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:136, output treesize:139 [2021-10-13 08:01:13,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:13,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:01:13,789 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_10| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 08:01:13,793 INFO L168 Benchmark]: Toolchain (without parser) took 7302.33 ms. Allocated memory was 96.5 MB in the beginning and 161.5 MB in the end (delta: 65.0 MB). Free memory was 62.3 MB in the beginning and 130.0 MB in the end (delta: -67.8 MB). Peak memory consumption was 65.6 MB. Max. memory is 16.1 GB. [2021-10-13 08:01:13,794 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 96.5 MB. Free memory is still 51.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:01:13,794 INFO L168 Benchmark]: CACSL2BoogieTranslator took 444.57 ms. Allocated memory was 96.5 MB in the beginning and 132.1 MB in the end (delta: 35.7 MB). Free memory was 61.9 MB in the beginning and 102.2 MB in the end (delta: -40.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:01:13,795 INFO L168 Benchmark]: Boogie Procedure Inliner took 79.99 ms. Allocated memory is still 132.1 MB. Free memory was 102.2 MB in the beginning and 100.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:01:13,795 INFO L168 Benchmark]: Boogie Preprocessor took 31.36 ms. Allocated memory is still 132.1 MB. Free memory was 100.1 MB in the beginning and 98.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:01:13,795 INFO L168 Benchmark]: RCFGBuilder took 675.28 ms. Allocated memory is still 132.1 MB. Free memory was 98.6 MB in the beginning and 83.3 MB in the end (delta: 15.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-13 08:01:13,796 INFO L168 Benchmark]: TraceAbstraction took 6063.96 ms. Allocated memory was 132.1 MB in the beginning and 161.5 MB in the end (delta: 29.4 MB). Free memory was 82.8 MB in the beginning and 130.0 MB in the end (delta: -47.2 MB). Peak memory consumption was 51.8 MB. Max. memory is 16.1 GB. [2021-10-13 08:01:13,798 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 96.5 MB. Free memory is still 51.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 444.57 ms. Allocated memory was 96.5 MB in the beginning and 132.1 MB in the end (delta: 35.7 MB). Free memory was 61.9 MB in the beginning and 102.2 MB in the end (delta: -40.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 79.99 ms. Allocated memory is still 132.1 MB. Free memory was 102.2 MB in the beginning and 100.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.36 ms. Allocated memory is still 132.1 MB. Free memory was 100.1 MB in the beginning and 98.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 675.28 ms. Allocated memory is still 132.1 MB. Free memory was 98.6 MB in the beginning and 83.3 MB in the end (delta: 15.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6063.96 ms. Allocated memory was 132.1 MB in the beginning and 161.5 MB in the end (delta: 29.4 MB). Free memory was 82.8 MB in the beginning and 130.0 MB in the end (delta: -47.2 MB). Peak memory consumption was 51.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_10| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_10|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 08:01:13,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:01:16,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:01:16,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:01:16,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:01:16,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:01:16,947 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:01:16,949 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:01:16,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:01:16,965 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:01:16,978 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:01:16,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:01:16,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:01:16,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:01:16,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:01:16,988 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:01:16,990 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:01:16,991 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:01:16,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:01:16,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:01:16,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:01:17,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:01:17,006 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:01:17,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:01:17,009 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:01:17,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:01:17,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:01:17,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:01:17,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:01:17,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:01:17,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:01:17,020 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:01:17,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:01:17,027 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:01:17,028 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:01:17,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:01:17,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:01:17,032 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:01:17,032 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:01:17,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:01:17,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:01:17,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:01:17,037 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 08:01:17,096 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:01:17,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:01:17,098 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:01:17,098 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:01:17,098 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:01:17,098 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:01:17,099 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:01:17,099 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:01:17,099 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:01:17,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:01:17,102 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:01:17,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:01:17,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:01:17,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:01:17,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:01:17,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:01:17,104 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:01:17,104 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 08:01:17,104 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 08:01:17,105 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:01:17,105 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:01:17,105 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:01:17,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:01:17,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:01:17,106 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 08:01:17,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:01:17,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:01:17,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:01:17,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:01:17,107 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:01:17,107 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 08:01:17,108 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 08:01:17,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:01:17,108 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:01:17,108 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:01:17,109 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef15c4790969d8e640b2241771e44174daa41407 [2021-10-13 08:01:17,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:01:17,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:01:17,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:01:17,658 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:01:17,659 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:01:17,660 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c [2021-10-13 08:01:17,733 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/data/42a076370/c935c947f09f44a1941b63573c097b94/FLAG2f43a75bd [2021-10-13 08:01:18,448 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:01:18,454 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c [2021-10-13 08:01:18,467 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/data/42a076370/c935c947f09f44a1941b63573c097b94/FLAG2f43a75bd [2021-10-13 08:01:18,769 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/data/42a076370/c935c947f09f44a1941b63573c097b94 [2021-10-13 08:01:18,771 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:01:18,777 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:01:18,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:01:18,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:01:18,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:01:18,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:01:18" (1/1) ... [2021-10-13 08:01:18,786 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77fe973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:18, skipping insertion in model container [2021-10-13 08:01:18,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:01:18" (1/1) ... [2021-10-13 08:01:18,797 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:01:18,848 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:01:19,037 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[1123,1136] [2021-10-13 08:01:19,042 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[1338,1351] [2021-10-13 08:01:19,045 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[1654,1667] [2021-10-13 08:01:19,048 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[1869,1882] [2021-10-13 08:01:19,052 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[2402,2415] [2021-10-13 08:01:19,054 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[2617,2630] [2021-10-13 08:01:19,058 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[2919,2932] [2021-10-13 08:01:19,060 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[3134,3147] [2021-10-13 08:01:19,063 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[3404,3417] [2021-10-13 08:01:19,066 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[3622,3635] [2021-10-13 08:01:19,070 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[4106,4119] [2021-10-13 08:01:19,073 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[4324,4337] [2021-10-13 08:01:19,077 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[4820,4833] [2021-10-13 08:01:19,080 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[5221,5234] [2021-10-13 08:01:19,082 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[5439,5452] [2021-10-13 08:01:19,085 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[5881,5894] [2021-10-13 08:01:19,087 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[6099,6112] [2021-10-13 08:01:19,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:01:19,105 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:01:19,132 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[1123,1136] [2021-10-13 08:01:19,133 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[1338,1351] [2021-10-13 08:01:19,136 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[1654,1667] [2021-10-13 08:01:19,138 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[1869,1882] [2021-10-13 08:01:19,141 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[2402,2415] [2021-10-13 08:01:19,143 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[2617,2630] [2021-10-13 08:01:19,145 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[2919,2932] [2021-10-13 08:01:19,148 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[3134,3147] [2021-10-13 08:01:19,150 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[3404,3417] [2021-10-13 08:01:19,153 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[3622,3635] [2021-10-13 08:01:19,156 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[4106,4119] [2021-10-13 08:01:19,174 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[4324,4337] [2021-10-13 08:01:19,177 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[4820,4833] [2021-10-13 08:01:19,180 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[5221,5234] [2021-10-13 08:01:19,182 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[5439,5452] [2021-10-13 08:01:19,201 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[5881,5894] [2021-10-13 08:01:19,214 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_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+nlh-reducer.c[6099,6112] [2021-10-13 08:01:19,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:01:19,239 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:01:19,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:19 WrapperNode [2021-10-13 08:01:19,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:01:19,241 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:01:19,242 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:01:19,242 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:01:19,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:19" (1/1) ... [2021-10-13 08:01:19,262 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:19" (1/1) ... [2021-10-13 08:01:19,304 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:01:19,305 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:01:19,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:01:19,305 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:01:19,314 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:19" (1/1) ... [2021-10-13 08:01:19,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:19" (1/1) ... [2021-10-13 08:01:19,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:19" (1/1) ... [2021-10-13 08:01:19,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:19" (1/1) ... [2021-10-13 08:01:19,341 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:19" (1/1) ... [2021-10-13 08:01:19,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:19" (1/1) ... [2021-10-13 08:01:19,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:19" (1/1) ... [2021-10-13 08:01:19,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:01:19,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:01:19,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:01:19,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:01:19,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:19" (1/1) ... [2021-10-13 08:01:19,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:01:19,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:01:19,407 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:01:19,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:01:19,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 08:01:19,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:01:19,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:01:19,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:01:20,025 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:01:20,025 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-13 08:01:20,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:01:20 BoogieIcfgContainer [2021-10-13 08:01:20,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:01:20,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:01:20,031 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:01:20,034 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:01:20,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:01:18" (1/3) ... [2021-10-13 08:01:20,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a3eb644 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:01:20, skipping insertion in model container [2021-10-13 08:01:20,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:19" (2/3) ... [2021-10-13 08:01:20,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a3eb644 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:01:20, skipping insertion in model container [2021-10-13 08:01:20,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:01:20" (3/3) ... [2021-10-13 08:01:20,039 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i.v+nlh-reducer.c [2021-10-13 08:01:20,046 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:01:20,047 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2021-10-13 08:01:20,109 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:01:20,117 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, mConcurrency=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 [2021-10-13 08:01:20,117 INFO L340 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2021-10-13 08:01:20,138 INFO L276 IsEmpty]: Start isEmpty. Operand has 71 states, 53 states have (on average 1.849056603773585) internal successors, (98), 70 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:20,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 08:01:20,144 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:20,145 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:20,146 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:20,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:20,153 INFO L82 PathProgramCache]: Analyzing trace with hash 123971630, now seen corresponding path program 1 times [2021-10-13 08:01:20,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:20,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1761408365] [2021-10-13 08:01:20,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:20,170 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:20,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:20,174 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:20,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 08:01:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:20,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 08:01:20,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:20,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:20,762 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:20,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1761408365] [2021-10-13 08:01:20,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1761408365] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:20,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:20,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 08:01:20,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648104845] [2021-10-13 08:01:20,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:01:20,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:20,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:01:20,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:01:20,789 INFO L87 Difference]: Start difference. First operand has 71 states, 53 states have (on average 1.849056603773585) internal successors, (98), 70 states have internal predecessors, (98), 0 states have call successors, (0), 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 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:21,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:21,074 INFO L93 Difference]: Finished difference Result 133 states and 172 transitions. [2021-10-13 08:01:21,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 08:01:21,077 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 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 8 [2021-10-13 08:01:21,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:21,087 INFO L225 Difference]: With dead ends: 133 [2021-10-13 08:01:21,088 INFO L226 Difference]: Without dead ends: 109 [2021-10-13 08:01:21,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:01:21,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-13 08:01:21,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 65. [2021-10-13 08:01:21,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 64 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:21,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2021-10-13 08:01:21,132 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 8 [2021-10-13 08:01:21,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:21,133 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2021-10-13 08:01:21,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:21,134 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2021-10-13 08:01:21,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 08:01:21,134 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:21,135 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:21,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-13 08:01:21,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:01:21,348 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:21,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:21,350 INFO L82 PathProgramCache]: Analyzing trace with hash 120336139, now seen corresponding path program 1 times [2021-10-13 08:01:21,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:21,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1665103839] [2021-10-13 08:01:21,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:21,351 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:21,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:21,352 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:21,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 08:01:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:21,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:01:21,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:21,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:21,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:21,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:21,539 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:21,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1665103839] [2021-10-13 08:01:21,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1665103839] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:21,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:21,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 08:01:21,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360576976] [2021-10-13 08:01:21,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:01:21,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:21,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:01:21,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:01:21,544 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:21,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:21,756 INFO L93 Difference]: Finished difference Result 158 states and 168 transitions. [2021-10-13 08:01:21,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 08:01:21,758 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 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 8 [2021-10-13 08:01:21,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:21,760 INFO L225 Difference]: With dead ends: 158 [2021-10-13 08:01:21,761 INFO L226 Difference]: Without dead ends: 156 [2021-10-13 08:01:21,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:01:21,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-13 08:01:21,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 70. [2021-10-13 08:01:21,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 69 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:21,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-10-13 08:01:21,783 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 8 [2021-10-13 08:01:21,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:21,784 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-10-13 08:01:21,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:21,787 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-10-13 08:01:21,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 08:01:21,788 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:21,788 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:21,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:22,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:01:22,001 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:22,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:22,002 INFO L82 PathProgramCache]: Analyzing trace with hash -564542931, now seen corresponding path program 1 times [2021-10-13 08:01:22,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:22,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1714106133] [2021-10-13 08:01:22,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:22,003 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:22,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:22,005 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:22,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 08:01:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:22,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 08:01:22,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:22,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:22,328 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:22,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1714106133] [2021-10-13 08:01:22,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1714106133] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:22,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:22,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 08:01:22,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791635682] [2021-10-13 08:01:22,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:01:22,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:22,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:01:22,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:01:22,336 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:22,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:22,541 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2021-10-13 08:01:22,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 08:01:22,546 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 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 9 [2021-10-13 08:01:22,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:22,548 INFO L225 Difference]: With dead ends: 111 [2021-10-13 08:01:22,551 INFO L226 Difference]: Without dead ends: 109 [2021-10-13 08:01:22,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.7ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-13 08:01:22,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-13 08:01:22,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2021-10-13 08:01:22,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 57 states have (on average 1.3859649122807018) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:22,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2021-10-13 08:01:22,573 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 9 [2021-10-13 08:01:22,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:22,574 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2021-10-13 08:01:22,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:22,574 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2021-10-13 08:01:22,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 08:01:22,576 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:22,577 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:22,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-13 08:01:22,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:01:22,792 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:22,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:22,793 INFO L82 PathProgramCache]: Analyzing trace with hash -429055130, now seen corresponding path program 1 times [2021-10-13 08:01:22,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:22,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [229717427] [2021-10-13 08:01:22,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:22,794 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:22,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:22,796 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:22,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 08:01:22,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:22,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:01:22,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:22,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:22,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:23,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:23,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:23,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [229717427] [2021-10-13 08:01:23,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [229717427] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:23,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:23,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 08:01:23,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268019338] [2021-10-13 08:01:23,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 08:01:23,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:23,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 08:01:23,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:01:23,029 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:23,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:23,395 INFO L93 Difference]: Finished difference Result 230 states and 245 transitions. [2021-10-13 08:01:23,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 08:01:23,396 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 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 11 [2021-10-13 08:01:23,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:23,399 INFO L225 Difference]: With dead ends: 230 [2021-10-13 08:01:23,400 INFO L226 Difference]: Without dead ends: 228 [2021-10-13 08:01:23,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-13 08:01:23,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-10-13 08:01:23,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 83. [2021-10-13 08:01:23,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 67 states have (on average 1.4328358208955223) internal successors, (96), 82 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:23,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2021-10-13 08:01:23,419 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 11 [2021-10-13 08:01:23,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:23,420 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2021-10-13 08:01:23,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:23,421 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2021-10-13 08:01:23,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 08:01:23,421 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:23,422 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:23,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:23,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:01:23,635 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:23,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:23,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1359750351, now seen corresponding path program 1 times [2021-10-13 08:01:23,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:23,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [48053903] [2021-10-13 08:01:23,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:23,636 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:23,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:23,637 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:23,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 08:01:23,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:23,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:01:23,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:23,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:23,868 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:23,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [48053903] [2021-10-13 08:01:23,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [48053903] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:23,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:23,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 08:01:23,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650717036] [2021-10-13 08:01:23,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 08:01:23,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:23,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 08:01:23,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:01:23,872 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:24,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:24,223 INFO L93 Difference]: Finished difference Result 224 states and 239 transitions. [2021-10-13 08:01:24,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 08:01:24,224 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 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 11 [2021-10-13 08:01:24,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:24,226 INFO L225 Difference]: With dead ends: 224 [2021-10-13 08:01:24,227 INFO L226 Difference]: Without dead ends: 222 [2021-10-13 08:01:24,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-13 08:01:24,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-10-13 08:01:24,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 106. [2021-10-13 08:01:24,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 90 states have (on average 1.5333333333333334) internal successors, (138), 105 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:24,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 138 transitions. [2021-10-13 08:01:24,248 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 138 transitions. Word has length 11 [2021-10-13 08:01:24,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:24,248 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 138 transitions. [2021-10-13 08:01:24,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:24,249 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 138 transitions. [2021-10-13 08:01:24,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 08:01:24,250 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:24,250 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:24,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:24,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:01:24,473 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:24,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:24,474 INFO L82 PathProgramCache]: Analyzing trace with hash -415802953, now seen corresponding path program 1 times [2021-10-13 08:01:24,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:24,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473044234] [2021-10-13 08:01:24,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:24,474 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:24,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:24,475 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:24,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 08:01:24,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:24,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:01:24,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:24,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:24,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:24,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:24,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473044234] [2021-10-13 08:01:24,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473044234] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:24,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:24,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [] total 8 [2021-10-13 08:01:24,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120651209] [2021-10-13 08:01:24,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 08:01:24,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:24,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 08:01:24,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:01:24,825 INFO L87 Difference]: Start difference. First operand 106 states and 138 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:25,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:25,052 INFO L93 Difference]: Finished difference Result 132 states and 155 transitions. [2021-10-13 08:01:25,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 08:01:25,054 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 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 12 [2021-10-13 08:01:25,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:25,055 INFO L225 Difference]: With dead ends: 132 [2021-10-13 08:01:25,055 INFO L226 Difference]: Without dead ends: 126 [2021-10-13 08:01:25,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-13 08:01:25,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-10-13 08:01:25,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 102. [2021-10-13 08:01:25,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 87 states have (on average 1.5057471264367817) internal successors, (131), 101 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:25,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 131 transitions. [2021-10-13 08:01:25,068 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 131 transitions. Word has length 12 [2021-10-13 08:01:25,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:25,068 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 131 transitions. [2021-10-13 08:01:25,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:25,069 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 131 transitions. [2021-10-13 08:01:25,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 08:01:25,074 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:25,075 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:25,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:25,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:01:25,289 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:25,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:25,289 INFO L82 PathProgramCache]: Analyzing trace with hash -415312395, now seen corresponding path program 1 times [2021-10-13 08:01:25,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:25,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842781718] [2021-10-13 08:01:25,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:25,290 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:25,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:25,291 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:25,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 08:01:25,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:25,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:01:25,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:25,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:25,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:25,556 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:25,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842781718] [2021-10-13 08:01:25,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842781718] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:25,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:25,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 08:01:25,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391252351] [2021-10-13 08:01:25,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 08:01:25,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:25,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 08:01:25,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:01:25,560 INFO L87 Difference]: Start difference. First operand 102 states and 131 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:25,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:25,993 INFO L93 Difference]: Finished difference Result 314 states and 336 transitions. [2021-10-13 08:01:25,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 08:01:25,994 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 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 12 [2021-10-13 08:01:25,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:25,997 INFO L225 Difference]: With dead ends: 314 [2021-10-13 08:01:25,997 INFO L226 Difference]: Without dead ends: 312 [2021-10-13 08:01:25,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-13 08:01:25,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-10-13 08:01:26,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 104. [2021-10-13 08:01:26,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 89 states have (on average 1.4831460674157304) internal successors, (132), 103 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:26,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 132 transitions. [2021-10-13 08:01:26,014 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 132 transitions. Word has length 12 [2021-10-13 08:01:26,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:26,015 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 132 transitions. [2021-10-13 08:01:26,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:26,015 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 132 transitions. [2021-10-13 08:01:26,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 08:01:26,017 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:26,018 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:26,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:26,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:01:26,230 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:26,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:26,230 INFO L82 PathProgramCache]: Analyzing trace with hash 797416153, now seen corresponding path program 1 times [2021-10-13 08:01:26,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:26,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1957686690] [2021-10-13 08:01:26,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:26,234 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:26,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:26,234 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:26,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 08:01:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:26,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:01:26,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:26,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:26,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:26,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:26,581 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:26,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1957686690] [2021-10-13 08:01:26,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1957686690] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:26,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:26,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [] total 8 [2021-10-13 08:01:26,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627031386] [2021-10-13 08:01:26,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 08:01:26,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:26,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 08:01:26,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:01:26,584 INFO L87 Difference]: Start difference. First operand 104 states and 132 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:26,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:26,799 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2021-10-13 08:01:26,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 08:01:26,800 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 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 12 [2021-10-13 08:01:26,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:26,801 INFO L225 Difference]: With dead ends: 124 [2021-10-13 08:01:26,801 INFO L226 Difference]: Without dead ends: 118 [2021-10-13 08:01:26,802 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-13 08:01:26,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-13 08:01:26,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 100. [2021-10-13 08:01:26,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 86 states have (on average 1.4534883720930232) internal successors, (125), 99 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:26,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 125 transitions. [2021-10-13 08:01:26,813 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 125 transitions. Word has length 12 [2021-10-13 08:01:26,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:26,814 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 125 transitions. [2021-10-13 08:01:26,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:26,814 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 125 transitions. [2021-10-13 08:01:26,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 08:01:26,815 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:26,816 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:26,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:27,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:01:27,029 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:27,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:27,030 INFO L82 PathProgramCache]: Analyzing trace with hash 10221853, now seen corresponding path program 1 times [2021-10-13 08:01:27,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:27,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [299886582] [2021-10-13 08:01:27,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:27,030 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:27,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:27,031 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:27,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 08:01:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:27,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:01:27,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:27,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:27,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:27,644 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:27,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [299886582] [2021-10-13 08:01:27,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [299886582] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:27,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:27,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-10-13 08:01:27,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529973954] [2021-10-13 08:01:27,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 08:01:27,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:27,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 08:01:27,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-13 08:01:27,648 INFO L87 Difference]: Start difference. First operand 100 states and 125 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:28,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:28,255 INFO L93 Difference]: Finished difference Result 150 states and 171 transitions. [2021-10-13 08:01:28,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 08:01:28,256 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 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 13 [2021-10-13 08:01:28,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:28,258 INFO L225 Difference]: With dead ends: 150 [2021-10-13 08:01:28,258 INFO L226 Difference]: Without dead ends: 148 [2021-10-13 08:01:28,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 341.9ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-10-13 08:01:28,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-13 08:01:28,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 98. [2021-10-13 08:01:28,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 85 states have (on average 1.423529411764706) internal successors, (121), 97 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:28,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2021-10-13 08:01:28,267 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 13 [2021-10-13 08:01:28,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:28,267 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2021-10-13 08:01:28,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:28,268 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2021-10-13 08:01:28,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 08:01:28,269 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:28,269 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:28,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:28,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:01:28,491 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:28,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:28,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1032848570, now seen corresponding path program 1 times [2021-10-13 08:01:28,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:28,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [424048580] [2021-10-13 08:01:28,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:28,494 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:28,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:28,495 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:28,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 08:01:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:28,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:01:28,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:28,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:28,813 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:28,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [424048580] [2021-10-13 08:01:28,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [424048580] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:28,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:28,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 08:01:28,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246026319] [2021-10-13 08:01:28,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 08:01:28,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:28,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 08:01:28,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:01:28,817 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:29,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:29,140 INFO L93 Difference]: Finished difference Result 245 states and 266 transitions. [2021-10-13 08:01:29,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 08:01:29,144 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 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 13 [2021-10-13 08:01:29,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:29,146 INFO L225 Difference]: With dead ends: 245 [2021-10-13 08:01:29,146 INFO L226 Difference]: Without dead ends: 243 [2021-10-13 08:01:29,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-13 08:01:29,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-10-13 08:01:29,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 101. [2021-10-13 08:01:29,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 88 states have (on average 1.4204545454545454) internal successors, (125), 100 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:29,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 125 transitions. [2021-10-13 08:01:29,161 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 125 transitions. Word has length 13 [2021-10-13 08:01:29,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:29,162 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 125 transitions. [2021-10-13 08:01:29,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:29,162 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 125 transitions. [2021-10-13 08:01:29,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 08:01:29,164 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:29,164 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:29,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:29,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:01:29,379 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:29,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:29,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1031124666, now seen corresponding path program 1 times [2021-10-13 08:01:29,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:29,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023681419] [2021-10-13 08:01:29,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:29,380 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:29,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:29,381 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:29,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 08:01:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:29,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:01:29,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:29,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:29,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:29,659 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:29,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023681419] [2021-10-13 08:01:29,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023681419] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:29,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:29,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 08:01:29,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950982703] [2021-10-13 08:01:29,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 08:01:29,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:29,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 08:01:29,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:01:29,662 INFO L87 Difference]: Start difference. First operand 101 states and 125 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:29,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:29,981 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2021-10-13 08:01:29,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 08:01:29,982 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 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 13 [2021-10-13 08:01:29,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:29,984 INFO L225 Difference]: With dead ends: 168 [2021-10-13 08:01:29,984 INFO L226 Difference]: Without dead ends: 166 [2021-10-13 08:01:29,984 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-13 08:01:29,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-10-13 08:01:30,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 103. [2021-10-13 08:01:30,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 90 states have (on average 1.4222222222222223) internal successors, (128), 102 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:30,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-10-13 08:01:30,004 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 13 [2021-10-13 08:01:30,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:30,004 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-10-13 08:01:30,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:30,005 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-10-13 08:01:30,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 08:01:30,006 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:30,006 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:30,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:30,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:01:30,219 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:30,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:30,220 INFO L82 PathProgramCache]: Analyzing trace with hash 310078394, now seen corresponding path program 1 times [2021-10-13 08:01:30,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:30,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807996266] [2021-10-13 08:01:30,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:30,221 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:30,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:30,222 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:30,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 08:01:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:30,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:01:30,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:30,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:30,843 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:30,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807996266] [2021-10-13 08:01:30,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807996266] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:30,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:30,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-10-13 08:01:30,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027698496] [2021-10-13 08:01:30,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 08:01:30,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:30,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 08:01:30,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-13 08:01:30,848 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:31,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:31,419 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2021-10-13 08:01:31,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 08:01:31,419 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 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 14 [2021-10-13 08:01:31,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:31,420 INFO L225 Difference]: With dead ends: 113 [2021-10-13 08:01:31,421 INFO L226 Difference]: Without dead ends: 111 [2021-10-13 08:01:31,421 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 378.4ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-10-13 08:01:31,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-13 08:01:31,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 101. [2021-10-13 08:01:31,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 89 states have (on average 1.3932584269662922) internal successors, (124), 100 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:31,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2021-10-13 08:01:31,430 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 14 [2021-10-13 08:01:31,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:31,430 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2021-10-13 08:01:31,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:31,431 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2021-10-13 08:01:31,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 08:01:31,432 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:31,432 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:31,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:31,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:01:31,645 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:31,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:31,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1953530500, now seen corresponding path program 1 times [2021-10-13 08:01:31,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:31,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216573941] [2021-10-13 08:01:31,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:31,646 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:31,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:31,647 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:31,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 08:01:31,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:31,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:01:31,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:32,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:32,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:32,269 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:32,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216573941] [2021-10-13 08:01:32,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216573941] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:32,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:32,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-10-13 08:01:32,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024301239] [2021-10-13 08:01:32,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 08:01:32,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:32,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 08:01:32,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-13 08:01:32,272 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:32,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:32,876 INFO L93 Difference]: Finished difference Result 141 states and 168 transitions. [2021-10-13 08:01:32,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 08:01:32,877 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 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 14 [2021-10-13 08:01:32,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:32,879 INFO L225 Difference]: With dead ends: 141 [2021-10-13 08:01:32,879 INFO L226 Difference]: Without dead ends: 139 [2021-10-13 08:01:32,880 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 294.2ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-10-13 08:01:32,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-13 08:01:32,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 99. [2021-10-13 08:01:32,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 88 states have (on average 1.375) internal successors, (121), 98 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:32,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 121 transitions. [2021-10-13 08:01:32,888 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 121 transitions. Word has length 14 [2021-10-13 08:01:32,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:32,889 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 121 transitions. [2021-10-13 08:01:32,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:32,889 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 121 transitions. [2021-10-13 08:01:32,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 08:01:32,890 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:32,890 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:32,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-10-13 08:01:33,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:01:33,103 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:33,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:33,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1951983355, now seen corresponding path program 1 times [2021-10-13 08:01:33,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:33,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707236249] [2021-10-13 08:01:33,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:33,104 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:33,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:33,105 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:33,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 08:01:33,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:33,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:01:33,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:33,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:33,373 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:33,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1707236249] [2021-10-13 08:01:33,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1707236249] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:33,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:33,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 08:01:33,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329766427] [2021-10-13 08:01:33,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 08:01:33,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:33,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 08:01:33,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:01:33,375 INFO L87 Difference]: Start difference. First operand 99 states and 121 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:33,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:33,691 INFO L93 Difference]: Finished difference Result 225 states and 248 transitions. [2021-10-13 08:01:33,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 08:01:33,692 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 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 14 [2021-10-13 08:01:33,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:33,694 INFO L225 Difference]: With dead ends: 225 [2021-10-13 08:01:33,694 INFO L226 Difference]: Without dead ends: 223 [2021-10-13 08:01:33,695 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-13 08:01:33,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-10-13 08:01:33,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 104. [2021-10-13 08:01:33,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 93 states have (on average 1.3440860215053763) internal successors, (125), 103 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:33,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 125 transitions. [2021-10-13 08:01:33,705 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 125 transitions. Word has length 14 [2021-10-13 08:01:33,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:33,706 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 125 transitions. [2021-10-13 08:01:33,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:33,706 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 125 transitions. [2021-10-13 08:01:33,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 08:01:33,707 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:33,707 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:33,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:33,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:01:33,921 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:33,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:33,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1900089420, now seen corresponding path program 1 times [2021-10-13 08:01:33,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:33,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [454162864] [2021-10-13 08:01:33,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:33,922 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:33,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:33,923 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:33,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 08:01:34,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:34,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:01:34,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:34,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:34,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:34,496 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:34,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [454162864] [2021-10-13 08:01:34,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [454162864] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:34,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:34,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-10-13 08:01:34,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235390862] [2021-10-13 08:01:34,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 08:01:34,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:34,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 08:01:34,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-13 08:01:34,498 INFO L87 Difference]: Start difference. First operand 104 states and 125 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:34,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:34,946 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2021-10-13 08:01:34,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 08:01:34,946 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 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 14 [2021-10-13 08:01:34,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:34,947 INFO L225 Difference]: With dead ends: 108 [2021-10-13 08:01:34,947 INFO L226 Difference]: Without dead ends: 102 [2021-10-13 08:01:34,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 265.3ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-10-13 08:01:34,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-13 08:01:34,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2021-10-13 08:01:34,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 90 states have (on average 1.3111111111111111) internal successors, (118), 99 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:34,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 118 transitions. [2021-10-13 08:01:34,957 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 118 transitions. Word has length 14 [2021-10-13 08:01:34,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:34,957 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 118 transitions. [2021-10-13 08:01:34,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:34,957 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 118 transitions. [2021-10-13 08:01:34,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 08:01:34,958 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:34,958 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:34,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:35,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:01:35,171 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:35,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:35,172 INFO L82 PathProgramCache]: Analyzing trace with hash -381937728, now seen corresponding path program 1 times [2021-10-13 08:01:35,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:35,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1321271861] [2021-10-13 08:01:35,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:35,172 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:35,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:35,174 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:35,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 08:01:35,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:35,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:01:35,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:35,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:35,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:35,795 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:35,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1321271861] [2021-10-13 08:01:35,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1321271861] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:35,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:35,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-10-13 08:01:35,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686821610] [2021-10-13 08:01:35,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 08:01:35,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:35,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 08:01:35,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-13 08:01:35,797 INFO L87 Difference]: Start difference. First operand 100 states and 118 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:36,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:36,335 INFO L93 Difference]: Finished difference Result 141 states and 166 transitions. [2021-10-13 08:01:36,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 08:01:36,337 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 08:01:36,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:36,338 INFO L225 Difference]: With dead ends: 141 [2021-10-13 08:01:36,338 INFO L226 Difference]: Without dead ends: 139 [2021-10-13 08:01:36,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 290.0ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-10-13 08:01:36,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-13 08:01:36,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 98. [2021-10-13 08:01:36,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 89 states have (on average 1.2808988764044944) internal successors, (114), 97 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:36,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 114 transitions. [2021-10-13 08:01:36,348 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 114 transitions. Word has length 15 [2021-10-13 08:01:36,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:36,349 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 114 transitions. [2021-10-13 08:01:36,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:36,349 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 114 transitions. [2021-10-13 08:01:36,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 08:01:36,350 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:36,350 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:36,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:36,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:01:36,569 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:36,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:36,570 INFO L82 PathProgramCache]: Analyzing trace with hash -441974753, now seen corresponding path program 1 times [2021-10-13 08:01:36,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:36,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2069602102] [2021-10-13 08:01:36,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:36,571 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:36,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:36,572 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:36,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 08:01:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:36,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 08:01:36,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:36,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:37,046 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:37,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2069602102] [2021-10-13 08:01:37,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2069602102] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:37,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:37,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-10-13 08:01:37,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244970880] [2021-10-13 08:01:37,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 08:01:37,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:37,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 08:01:37,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-13 08:01:37,048 INFO L87 Difference]: Start difference. First operand 98 states and 114 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:37,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:37,544 INFO L93 Difference]: Finished difference Result 197 states and 219 transitions. [2021-10-13 08:01:37,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 08:01:37,544 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 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 16 [2021-10-13 08:01:37,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:37,546 INFO L225 Difference]: With dead ends: 197 [2021-10-13 08:01:37,546 INFO L226 Difference]: Without dead ends: 195 [2021-10-13 08:01:37,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-10-13 08:01:37,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-10-13 08:01:37,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 109. [2021-10-13 08:01:37,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 100 states have (on average 1.31) internal successors, (131), 108 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:37,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 131 transitions. [2021-10-13 08:01:37,557 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 131 transitions. Word has length 16 [2021-10-13 08:01:37,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:37,560 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 131 transitions. [2021-10-13 08:01:37,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:37,561 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 131 transitions. [2021-10-13 08:01:37,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 08:01:37,561 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:37,562 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:37,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:37,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:01:37,776 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:37,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:37,777 INFO L82 PathProgramCache]: Analyzing trace with hash -816311340, now seen corresponding path program 1 times [2021-10-13 08:01:37,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:37,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324050781] [2021-10-13 08:01:37,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:37,778 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:37,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:37,779 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:37,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 08:01:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:37,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 08:01:37,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:38,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:38,307 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:38,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [324050781] [2021-10-13 08:01:38,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [324050781] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:38,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:38,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 4] imperfect sequences [] total 9 [2021-10-13 08:01:38,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577671157] [2021-10-13 08:01:38,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 08:01:38,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:38,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 08:01:38,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-13 08:01:38,309 INFO L87 Difference]: Start difference. First operand 109 states and 131 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:38,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:38,597 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2021-10-13 08:01:38,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 08:01:38,598 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-13 08:01:38,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:38,599 INFO L225 Difference]: With dead ends: 113 [2021-10-13 08:01:38,599 INFO L226 Difference]: Without dead ends: 107 [2021-10-13 08:01:38,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 115.6ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-13 08:01:38,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-13 08:01:38,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2021-10-13 08:01:38,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 97 states have (on average 1.2783505154639174) internal successors, (124), 104 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:38,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 124 transitions. [2021-10-13 08:01:38,609 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 124 transitions. Word has length 17 [2021-10-13 08:01:38,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:38,609 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 124 transitions. [2021-10-13 08:01:38,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:38,610 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 124 transitions. [2021-10-13 08:01:38,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 08:01:38,611 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:38,611 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:38,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:38,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:01:38,826 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:38,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:38,826 INFO L82 PathProgramCache]: Analyzing trace with hash -509168777, now seen corresponding path program 1 times [2021-10-13 08:01:38,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:38,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1368167636] [2021-10-13 08:01:38,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:38,827 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:38,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:38,829 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:38,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-13 08:01:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:39,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 08:01:39,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:39,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:39,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:39,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:39,267 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:39,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1368167636] [2021-10-13 08:01:39,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1368167636] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:39,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [633404800] [2021-10-13 08:01:39,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:39,268 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:01:39,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:01:39,281 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:01:39,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-10-13 08:01:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:39,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 08:01:39,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:39,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:39,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:39,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [633404800] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:39,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485010930] [2021-10-13 08:01:39,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:39,869 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:01:39,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:01:39,871 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:01:39,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-13 08:01:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:40,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 08:01:40,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:40,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:40,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:40,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:40,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485010930] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:40,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:01:40,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 8, 9] total 16 [2021-10-13 08:01:40,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974693186] [2021-10-13 08:01:40,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 08:01:40,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:40,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 08:01:40,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-10-13 08:01:40,646 INFO L87 Difference]: Start difference. First operand 105 states and 124 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:41,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:41,307 INFO L93 Difference]: Finished difference Result 193 states and 217 transitions. [2021-10-13 08:01:41,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 08:01:41,308 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 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 18 [2021-10-13 08:01:41,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:41,310 INFO L225 Difference]: With dead ends: 193 [2021-10-13 08:01:41,310 INFO L226 Difference]: Without dead ends: 191 [2021-10-13 08:01:41,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 389.3ms TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2021-10-13 08:01:41,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-10-13 08:01:41,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 116. [2021-10-13 08:01:41,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 108 states have (on average 1.2777777777777777) internal successors, (138), 115 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:41,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 138 transitions. [2021-10-13 08:01:41,323 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 138 transitions. Word has length 18 [2021-10-13 08:01:41,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:41,324 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 138 transitions. [2021-10-13 08:01:41,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:41,324 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 138 transitions. [2021-10-13 08:01:41,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 08:01:41,328 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:41,329 INFO L512 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] [2021-10-13 08:01:41,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:41,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:41,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-10-13 08:01:41,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:01:41,943 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:41,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:41,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1559537568, now seen corresponding path program 1 times [2021-10-13 08:01:41,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:41,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [852098675] [2021-10-13 08:01:41,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:41,944 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:41,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:41,946 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:41,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-13 08:01:42,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:42,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:01:42,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:42,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:42,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:42,590 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:42,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [852098675] [2021-10-13 08:01:42,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [852098675] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:42,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [514662975] [2021-10-13 08:01:42,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:42,591 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:01:42,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:01:42,593 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:01:42,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-10-13 08:01:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:43,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:01:43,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:43,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:43,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:43,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:43,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [514662975] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:43,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409161970] [2021-10-13 08:01:43,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:43,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:01:43,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:01:43,233 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:01:43,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-13 08:01:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:43,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 08:01:43,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:44,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:44,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:44,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409161970] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:44,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:01:44,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 10] total 27 [2021-10-13 08:01:44,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147371493] [2021-10-13 08:01:44,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 08:01:44,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:44,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 08:01:44,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2021-10-13 08:01:44,525 INFO L87 Difference]: Start difference. First operand 116 states and 138 transitions. Second operand has 27 states, 27 states have (on average 3.2962962962962963) internal successors, (89), 27 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:46,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:46,561 INFO L93 Difference]: Finished difference Result 310 states and 346 transitions. [2021-10-13 08:01:46,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 08:01:46,563 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.2962962962962963) internal successors, (89), 27 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 08:01:46,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:46,565 INFO L225 Difference]: With dead ends: 310 [2021-10-13 08:01:46,565 INFO L226 Difference]: Without dead ends: 302 [2021-10-13 08:01:46,567 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1526.0ms TimeCoverageRelationStatistics Valid=559, Invalid=1163, Unknown=0, NotChecked=0, Total=1722 [2021-10-13 08:01:46,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-10-13 08:01:46,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 188. [2021-10-13 08:01:46,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 180 states have (on average 1.3611111111111112) internal successors, (245), 187 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:46,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 245 transitions. [2021-10-13 08:01:46,587 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 245 transitions. Word has length 25 [2021-10-13 08:01:46,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:46,587 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 245 transitions. [2021-10-13 08:01:46,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.2962962962962963) internal successors, (89), 27 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:46,588 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 245 transitions. [2021-10-13 08:01:46,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 08:01:46,589 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:46,589 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:46,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:46,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:47,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-10-13 08:01:47,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:01:47,203 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:47,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:47,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1882803615, now seen corresponding path program 1 times [2021-10-13 08:01:47,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:47,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110063299] [2021-10-13 08:01:47,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:47,205 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:47,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:47,206 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:47,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-13 08:01:47,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:47,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:01:47,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:47,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:47,865 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:47,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110063299] [2021-10-13 08:01:47,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110063299] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:47,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1594252624] [2021-10-13 08:01:47,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:47,866 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:01:47,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:01:47,867 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:01:47,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-10-13 08:01:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:48,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:01:48,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:48,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:48,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1594252624] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:48,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32344234] [2021-10-13 08:01:48,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:48,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:01:48,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:01:48,513 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:01:48,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-13 08:01:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:48,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 08:01:48,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:49,243 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:49,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:49,710 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:49,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32344234] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:49,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:01:49,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 10] total 27 [2021-10-13 08:01:49,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905562702] [2021-10-13 08:01:49,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 08:01:49,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:49,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 08:01:49,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2021-10-13 08:01:49,713 INFO L87 Difference]: Start difference. First operand 188 states and 245 transitions. Second operand has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 27 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) [2021-10-13 08:01:51,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:51,796 INFO L93 Difference]: Finished difference Result 292 states and 328 transitions. [2021-10-13 08:01:51,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 08:01:51,797 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 27 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 26 [2021-10-13 08:01:51,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:51,798 INFO L225 Difference]: With dead ends: 292 [2021-10-13 08:01:51,798 INFO L226 Difference]: Without dead ends: 284 [2021-10-13 08:01:51,799 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1468.2ms TimeCoverageRelationStatistics Valid=559, Invalid=1163, Unknown=0, NotChecked=0, Total=1722 [2021-10-13 08:01:51,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-10-13 08:01:51,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 192. [2021-10-13 08:01:51,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 184 states have (on average 1.3315217391304348) internal successors, (245), 191 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:51,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 245 transitions. [2021-10-13 08:01:51,819 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 245 transitions. Word has length 26 [2021-10-13 08:01:51,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:51,819 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 245 transitions. [2021-10-13 08:01:51,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 27 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) [2021-10-13 08:01:51,820 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 245 transitions. [2021-10-13 08:01:51,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 08:01:51,821 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:51,821 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:51,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:52,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-10-13 08:01:52,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-10-13 08:01:52,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:01:52,425 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:52,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:52,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1607204747, now seen corresponding path program 1 times [2021-10-13 08:01:52,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:52,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079647945] [2021-10-13 08:01:52,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:52,426 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:52,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:52,428 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:52,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-13 08:01:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:52,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:01:52,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:52,880 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:52,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:53,022 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:53,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079647945] [2021-10-13 08:01:53,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079647945] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:53,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [806221436] [2021-10-13 08:01:53,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:53,022 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:01:53,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:01:53,023 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:01:53,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-10-13 08:01:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:53,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:01:53,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:53,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:53,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:53,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:53,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [806221436] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:53,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553587410] [2021-10-13 08:01:53,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:53,756 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:01:53,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:01:53,757 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:01:53,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-13 08:01:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:54,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 08:01:54,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:54,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:01:54,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553587410] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 08:01:54,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-13 08:01:54,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8, 8, 8, 13] total 25 [2021-10-13 08:01:54,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100562314] [2021-10-13 08:01:54,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 08:01:54,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:54,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 08:01:54,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-10-13 08:01:54,954 INFO L87 Difference]: Start difference. First operand 192 states and 245 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:55,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:55,735 INFO L93 Difference]: Finished difference Result 298 states and 384 transitions. [2021-10-13 08:01:55,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 08:01:55,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-13 08:01:55,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:55,742 INFO L225 Difference]: With dead ends: 298 [2021-10-13 08:01:55,742 INFO L226 Difference]: Without dead ends: 296 [2021-10-13 08:01:55,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 881.4ms TimeCoverageRelationStatistics Valid=284, Invalid=838, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 08:01:55,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-10-13 08:01:55,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 204. [2021-10-13 08:01:55,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 196 states have (on average 1.3112244897959184) internal successors, (257), 203 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:55,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 257 transitions. [2021-10-13 08:01:55,770 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 257 transitions. Word has length 26 [2021-10-13 08:01:55,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:55,770 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 257 transitions. [2021-10-13 08:01:55,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:55,771 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 257 transitions. [2021-10-13 08:01:55,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 08:01:55,772 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:55,772 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:55,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:55,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-10-13 08:01:56,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-10-13 08:01:56,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:01:56,376 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:01:56,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:56,377 INFO L82 PathProgramCache]: Analyzing trace with hash -210802699, now seen corresponding path program 1 times [2021-10-13 08:01:56,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:56,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1306226148] [2021-10-13 08:01:56,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:56,378 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:56,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:56,379 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:56,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-13 08:01:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:56,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:01:56,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:56,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:57,220 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:57,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1306226148] [2021-10-13 08:01:57,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1306226148] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:57,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [101908891] [2021-10-13 08:01:57,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:57,221 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:01:57,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:01:57,222 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:01:57,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-10-13 08:01:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:57,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:01:57,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:57,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:57,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:58,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [101908891] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:58,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36082080] [2021-10-13 08:01:58,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:58,033 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:01:58,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:01:58,033 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:01:58,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-13 08:01:58,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:58,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 08:01:58,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:59,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:59,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:59,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36082080] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 08:01:59,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-13 08:01:59,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8, 8, 8, 14] total 26 [2021-10-13 08:01:59,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268687240] [2021-10-13 08:01:59,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 08:01:59,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:59,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 08:01:59,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2021-10-13 08:01:59,318 INFO L87 Difference]: Start difference. First operand 204 states and 257 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:00,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:02:00,080 INFO L93 Difference]: Finished difference Result 355 states and 462 transitions. [2021-10-13 08:02:00,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 08:02:00,080 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-13 08:02:00,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:02:00,083 INFO L225 Difference]: With dead ends: 355 [2021-10-13 08:02:00,083 INFO L226 Difference]: Without dead ends: 353 [2021-10-13 08:02:00,084 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 944.5ms TimeCoverageRelationStatistics Valid=315, Invalid=945, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 08:02:00,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-10-13 08:02:00,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 228. [2021-10-13 08:02:00,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 220 states have (on average 1.3363636363636364) internal successors, (294), 227 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:00,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 294 transitions. [2021-10-13 08:02:00,112 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 294 transitions. Word has length 27 [2021-10-13 08:02:00,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:02:00,112 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 294 transitions. [2021-10-13 08:02:00,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:00,113 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 294 transitions. [2021-10-13 08:02:00,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 08:02:00,113 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:02:00,114 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-13 08:02:00,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2021-10-13 08:02:00,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:00,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-10-13 08:02:00,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:02:00,718 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:02:00,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:02:00,718 INFO L82 PathProgramCache]: Analyzing trace with hash -209078795, now seen corresponding path program 1 times [2021-10-13 08:02:00,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:02:00,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10074840] [2021-10-13 08:02:00,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:00,719 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:02:00,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:02:00,720 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:02:00,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-13 08:02:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:01,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:02:01,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:01,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:01,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:01,490 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:02:01,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10074840] [2021-10-13 08:02:01,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10074840] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:02:01,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1678077074] [2021-10-13 08:02:01,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:01,493 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:02:01,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:02:01,494 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:02:01,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-10-13 08:02:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:02,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:02:02,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:02,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:02,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:02,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1678077074] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:02:02,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657336254] [2021-10-13 08:02:02,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:02,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:02:02,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:02:02,457 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:02:02,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-13 08:02:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:03,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 08:02:03,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:03,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:03,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:03,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657336254] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 08:02:03,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-13 08:02:03,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8, 8, 8, 14] total 26 [2021-10-13 08:02:03,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136987295] [2021-10-13 08:02:03,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 08:02:03,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:02:03,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 08:02:03,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2021-10-13 08:02:03,679 INFO L87 Difference]: Start difference. First operand 228 states and 294 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:04,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:02:04,050 INFO L93 Difference]: Finished difference Result 283 states and 362 transitions. [2021-10-13 08:02:04,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 08:02:04,051 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-13 08:02:04,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:02:04,053 INFO L225 Difference]: With dead ends: 283 [2021-10-13 08:02:04,053 INFO L226 Difference]: Without dead ends: 280 [2021-10-13 08:02:04,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 577.1ms TimeCoverageRelationStatistics Valid=271, Invalid=659, Unknown=0, NotChecked=0, Total=930 [2021-10-13 08:02:04,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-10-13 08:02:04,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 234. [2021-10-13 08:02:04,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 226 states have (on average 1.3274336283185841) internal successors, (300), 233 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:04,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 300 transitions. [2021-10-13 08:02:04,079 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 300 transitions. Word has length 27 [2021-10-13 08:02:04,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:02:04,080 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 300 transitions. [2021-10-13 08:02:04,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:04,080 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 300 transitions. [2021-10-13 08:02:04,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 08:02:04,081 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:02:04,081 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:02:04,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:04,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-10-13 08:02:04,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:04,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:02:04,685 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:02:04,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:02:04,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1762135332, now seen corresponding path program 1 times [2021-10-13 08:02:04,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:02:04,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855854465] [2021-10-13 08:02:04,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:04,686 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:02:04,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:02:04,687 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:02:04,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-10-13 08:02:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:05,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:02:05,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:05,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:05,383 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:05,383 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:02:05,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855854465] [2021-10-13 08:02:05,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [855854465] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:02:05,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1438691542] [2021-10-13 08:02:05,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:05,383 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:02:05,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:02:05,384 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:02:05,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-10-13 08:02:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:06,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:02:06,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:06,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:06,242 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:06,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1438691542] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:02:06,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543358019] [2021-10-13 08:02:06,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:06,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:02:06,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:02:06,252 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:02:06,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-13 08:02:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:06,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 08:02:06,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:07,328 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:07,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:07,525 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 08:02:07,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543358019] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:02:07,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:02:07,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 15, 8] total 26 [2021-10-13 08:02:07,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651994061] [2021-10-13 08:02:07,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 08:02:07,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:02:07,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 08:02:07,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2021-10-13 08:02:07,527 INFO L87 Difference]: Start difference. First operand 234 states and 300 transitions. Second operand has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:08,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:02:08,997 INFO L93 Difference]: Finished difference Result 437 states and 503 transitions. [2021-10-13 08:02:08,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 08:02:08,997 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-13 08:02:08,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:02:09,000 INFO L225 Difference]: With dead ends: 437 [2021-10-13 08:02:09,000 INFO L226 Difference]: Without dead ends: 435 [2021-10-13 08:02:09,002 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 894.0ms TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 08:02:09,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-10-13 08:02:09,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 232. [2021-10-13 08:02:09,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 225 states have (on average 1.3022222222222222) internal successors, (293), 231 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:09,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 293 transitions. [2021-10-13 08:02:09,039 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 293 transitions. Word has length 27 [2021-10-13 08:02:09,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:02:09,039 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 293 transitions. [2021-10-13 08:02:09,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:09,039 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 293 transitions. [2021-10-13 08:02:09,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 08:02:09,040 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:02:09,040 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-13 08:02:09,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:09,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2021-10-13 08:02:09,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-10-13 08:02:09,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:02:09,655 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:02:09,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:02:09,655 INFO L82 PathProgramCache]: Analyzing trace with hash 2056602166, now seen corresponding path program 1 times [2021-10-13 08:02:09,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:02:09,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171950238] [2021-10-13 08:02:09,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:09,656 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:02:09,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:02:09,657 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:02:09,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-10-13 08:02:10,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:10,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:02:10,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:10,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:10,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:10,478 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:02:10,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [171950238] [2021-10-13 08:02:10,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [171950238] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:02:10,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [583911228] [2021-10-13 08:02:10,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:10,479 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:02:10,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:02:10,480 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:02:10,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-10-13 08:02:11,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:11,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:02:11,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:11,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:11,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:11,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [583911228] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:02:11,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209791469] [2021-10-13 08:02:11,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:11,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:02:11,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:02:11,399 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:02:11,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-13 08:02:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:12,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 08:02:12,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:12,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:12,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:12,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209791469] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:02:12,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:02:12,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 14, 7] total 26 [2021-10-13 08:02:12,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392643796] [2021-10-13 08:02:12,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 08:02:12,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:02:12,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 08:02:12,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2021-10-13 08:02:12,659 INFO L87 Difference]: Start difference. First operand 232 states and 293 transitions. Second operand has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:14,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:02:14,701 INFO L93 Difference]: Finished difference Result 379 states and 433 transitions. [2021-10-13 08:02:14,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-13 08:02:14,701 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-13 08:02:14,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:02:14,703 INFO L225 Difference]: With dead ends: 379 [2021-10-13 08:02:14,703 INFO L226 Difference]: Without dead ends: 377 [2021-10-13 08:02:14,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 1280.6ms TimeCoverageRelationStatistics Valid=708, Invalid=1842, Unknown=0, NotChecked=0, Total=2550 [2021-10-13 08:02:14,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-10-13 08:02:14,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 225. [2021-10-13 08:02:14,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 218 states have (on average 1.3027522935779816) internal successors, (284), 224 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:14,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 284 transitions. [2021-10-13 08:02:14,725 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 284 transitions. Word has length 28 [2021-10-13 08:02:14,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:02:14,726 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 284 transitions. [2021-10-13 08:02:14,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:14,726 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 284 transitions. [2021-10-13 08:02:14,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 08:02:14,727 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:02:14,727 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:02:14,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:14,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:15,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2021-10-13 08:02:15,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:02:15,345 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:02:15,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:02:15,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1179352397, now seen corresponding path program 1 times [2021-10-13 08:02:15,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:02:15,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818915431] [2021-10-13 08:02:15,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:15,346 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:02:15,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:02:15,347 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:02:15,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-10-13 08:02:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:16,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:02:16,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:16,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:16,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:16,330 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:02:16,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818915431] [2021-10-13 08:02:16,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818915431] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:02:16,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [260805434] [2021-10-13 08:02:16,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:16,331 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:02:16,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:02:16,332 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:02:16,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-10-13 08:02:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:17,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:02:17,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:17,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:17,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:17,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [260805434] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:02:17,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620623662] [2021-10-13 08:02:17,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:17,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:02:17,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:02:17,426 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:02:17,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-13 08:02:18,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:18,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 08:02:18,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:18,733 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:18,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 08:02:18,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620623662] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 08:02:18,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-13 08:02:18,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8, 8, 8, 14] total 26 [2021-10-13 08:02:18,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054556341] [2021-10-13 08:02:18,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 08:02:18,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:02:18,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 08:02:18,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2021-10-13 08:02:18,954 INFO L87 Difference]: Start difference. First operand 225 states and 284 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:19,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:02:19,407 INFO L93 Difference]: Finished difference Result 325 states and 401 transitions. [2021-10-13 08:02:19,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 08:02:19,408 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 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 28 [2021-10-13 08:02:19,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:02:19,410 INFO L225 Difference]: With dead ends: 325 [2021-10-13 08:02:19,410 INFO L226 Difference]: Without dead ends: 323 [2021-10-13 08:02:19,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 691.5ms TimeCoverageRelationStatistics Valid=276, Invalid=716, Unknown=0, NotChecked=0, Total=992 [2021-10-13 08:02:19,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-10-13 08:02:19,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 212. [2021-10-13 08:02:19,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 206 states have (on average 1.266990291262136) internal successors, (261), 211 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:19,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 261 transitions. [2021-10-13 08:02:19,437 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 261 transitions. Word has length 28 [2021-10-13 08:02:19,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:02:19,437 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 261 transitions. [2021-10-13 08:02:19,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:19,438 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 261 transitions. [2021-10-13 08:02:19,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 08:02:19,438 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:02:19,439 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:02:19,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:19,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2021-10-13 08:02:19,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-10-13 08:02:20,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:02:20,053 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:02:20,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:02:20,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1177628493, now seen corresponding path program 1 times [2021-10-13 08:02:20,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:02:20,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100383089] [2021-10-13 08:02:20,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:20,054 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:02:20,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:02:20,055 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:02:20,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-10-13 08:02:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:20,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:02:20,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:20,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:20,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:21,043 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:21,043 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:02:21,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100383089] [2021-10-13 08:02:21,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100383089] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:02:21,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2109447849] [2021-10-13 08:02:21,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:21,044 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:02:21,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:02:21,045 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:02:21,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2021-10-13 08:02:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:22,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:02:22,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:22,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:22,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:22,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2109447849] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:02:22,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520708570] [2021-10-13 08:02:22,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:22,238 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:02:22,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:02:22,239 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:02:22,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-13 08:02:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:23,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 08:02:23,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:23,551 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:23,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:23,768 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 08:02:23,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520708570] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 08:02:23,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-13 08:02:23,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8, 8, 8, 14] total 26 [2021-10-13 08:02:23,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9498987] [2021-10-13 08:02:23,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 08:02:23,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:02:23,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 08:02:23,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2021-10-13 08:02:23,770 INFO L87 Difference]: Start difference. First operand 212 states and 261 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:24,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:02:24,173 INFO L93 Difference]: Finished difference Result 267 states and 325 transitions. [2021-10-13 08:02:24,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 08:02:24,174 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 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 28 [2021-10-13 08:02:24,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:02:24,175 INFO L225 Difference]: With dead ends: 267 [2021-10-13 08:02:24,175 INFO L226 Difference]: Without dead ends: 264 [2021-10-13 08:02:24,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 649.6ms TimeCoverageRelationStatistics Valid=271, Invalid=659, Unknown=0, NotChecked=0, Total=930 [2021-10-13 08:02:24,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-10-13 08:02:24,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 191. [2021-10-13 08:02:24,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.2258064516129032) internal successors, (228), 190 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:24,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 228 transitions. [2021-10-13 08:02:24,197 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 228 transitions. Word has length 28 [2021-10-13 08:02:24,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:02:24,197 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 228 transitions. [2021-10-13 08:02:24,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:24,198 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 228 transitions. [2021-10-13 08:02:24,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 08:02:24,198 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:02:24,199 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:02:24,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:24,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (48)] Ended with exit code 0 [2021-10-13 08:02:24,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:24,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:02:24,813 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:02:24,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:02:24,813 INFO L82 PathProgramCache]: Analyzing trace with hash -340832097, now seen corresponding path program 1 times [2021-10-13 08:02:24,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:02:24,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [718423909] [2021-10-13 08:02:24,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:24,814 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:02:24,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:02:24,815 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:02:24,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-10-13 08:02:25,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:25,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 08:02:25,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:25,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:26,110 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:02:26,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [718423909] [2021-10-13 08:02:26,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [718423909] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:02:26,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1954855499] [2021-10-13 08:02:26,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:26,111 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:02:26,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:02:26,112 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:02:26,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2021-10-13 08:02:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:27,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 08:02:27,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:27,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:27,443 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:27,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1954855499] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:02:27,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298859199] [2021-10-13 08:02:27,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:27,444 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:02:27,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:02:27,446 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:02:27,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-10-13 08:02:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:28,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 08:02:28,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:28,903 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:28,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:29,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298859199] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:02:29,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:02:29,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 12] total 35 [2021-10-13 08:02:29,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922731767] [2021-10-13 08:02:29,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-13 08:02:29,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:02:29,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-13 08:02:29,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 08:02:29,547 INFO L87 Difference]: Start difference. First operand 191 states and 228 transitions. Second operand has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 35 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:33,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:02:33,173 INFO L93 Difference]: Finished difference Result 363 states and 428 transitions. [2021-10-13 08:02:33,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-13 08:02:33,174 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 35 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-13 08:02:33,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:02:33,176 INFO L225 Difference]: With dead ends: 363 [2021-10-13 08:02:33,176 INFO L226 Difference]: Without dead ends: 353 [2021-10-13 08:02:33,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 2983.8ms TimeCoverageRelationStatistics Valid=1158, Invalid=2502, Unknown=0, NotChecked=0, Total=3660 [2021-10-13 08:02:33,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-10-13 08:02:33,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 261. [2021-10-13 08:02:33,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.26953125) internal successors, (325), 260 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:33,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 325 transitions. [2021-10-13 08:02:33,197 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 325 transitions. Word has length 34 [2021-10-13 08:02:33,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:02:33,197 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 325 transitions. [2021-10-13 08:02:33,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 35 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:33,198 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 325 transitions. [2021-10-13 08:02:33,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-13 08:02:33,198 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:02:33,198 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:02:33,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:33,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (50)] Ended with exit code 0 [2021-10-13 08:02:33,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (51)] Ended with exit code 0 [2021-10-13 08:02:33,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:02:33,800 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:02:33,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:02:33,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1131703241, now seen corresponding path program 2 times [2021-10-13 08:02:33,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:02:33,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985385044] [2021-10-13 08:02:33,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:02:33,801 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:02:33,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:02:33,802 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:02:33,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-10-13 08:02:34,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:02:34,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:02:34,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 08:02:34,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:34,828 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:34,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:35,101 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:02:35,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985385044] [2021-10-13 08:02:35,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985385044] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:02:35,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1317520240] [2021-10-13 08:02:35,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:02:35,103 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:02:35,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:02:35,105 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:02:35,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2021-10-13 08:02:36,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:02:36,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:02:36,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 08:02:36,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:36,492 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:36,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:36,630 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:36,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1317520240] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:02:36,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762651135] [2021-10-13 08:02:36,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:02:36,630 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:02:36,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:02:36,631 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:02:36,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-10-13 08:02:37,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:02:37,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:02:37,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 08:02:37,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:38,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-13 08:02:38,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762651135] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:02:38,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:02:38,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 17, 8] total 32 [2021-10-13 08:02:38,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6142422] [2021-10-13 08:02:38,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 08:02:38,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:02:38,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 08:02:38,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2021-10-13 08:02:38,711 INFO L87 Difference]: Start difference. First operand 261 states and 325 transitions. Second operand has 32 states, 32 states have (on average 3.59375) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:40,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:02:40,950 INFO L93 Difference]: Finished difference Result 325 states and 389 transitions. [2021-10-13 08:02:40,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-13 08:02:40,951 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.59375) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 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 38 [2021-10-13 08:02:40,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:02:40,953 INFO L225 Difference]: With dead ends: 325 [2021-10-13 08:02:40,953 INFO L226 Difference]: Without dead ends: 323 [2021-10-13 08:02:40,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 1651.8ms TimeCoverageRelationStatistics Valid=997, Invalid=2543, Unknown=0, NotChecked=0, Total=3540 [2021-10-13 08:02:40,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-10-13 08:02:40,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 259. [2021-10-13 08:02:40,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 255 states have (on average 1.2431372549019608) internal successors, (317), 258 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:40,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 317 transitions. [2021-10-13 08:02:40,990 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 317 transitions. Word has length 38 [2021-10-13 08:02:40,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:02:40,990 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 317 transitions. [2021-10-13 08:02:40,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.59375) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:40,991 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 317 transitions. [2021-10-13 08:02:40,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-13 08:02:40,992 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:02:40,992 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:02:41,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:41,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (53)] Ended with exit code 0 [2021-10-13 08:02:41,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (54)] Ended with exit code 0 [2021-10-13 08:02:41,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:02:41,609 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:02:41,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:02:41,609 INFO L82 PathProgramCache]: Analyzing trace with hash -467742210, now seen corresponding path program 2 times [2021-10-13 08:02:41,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:02:41,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1102410929] [2021-10-13 08:02:41,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:02:41,610 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:02:41,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:02:41,611 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:02:41,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-10-13 08:02:42,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 08:02:42,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:02:42,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 08:02:42,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:42,736 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-10-13 08:02:42,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:42,907 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-10-13 08:02:42,907 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:02:42,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1102410929] [2021-10-13 08:02:42,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1102410929] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:02:42,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:02:42,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 08:02:42,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165132390] [2021-10-13 08:02:42,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:02:42,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:02:42,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:02:42,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:02:42,910 INFO L87 Difference]: Start difference. First operand 259 states and 317 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:42,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:02:42,973 INFO L93 Difference]: Finished difference Result 259 states and 317 transitions. [2021-10-13 08:02:42,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:02:42,973 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-10-13 08:02:42,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:02:42,975 INFO L225 Difference]: With dead ends: 259 [2021-10-13 08:02:42,975 INFO L226 Difference]: Without dead ends: 256 [2021-10-13 08:02:42,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:02:42,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-10-13 08:02:43,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2021-10-13 08:02:43,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 253 states have (on average 1.2134387351778657) internal successors, (307), 255 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:43,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 307 transitions. [2021-10-13 08:02:43,002 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 307 transitions. Word has length 52 [2021-10-13 08:02:43,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:02:43,003 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 307 transitions. [2021-10-13 08:02:43,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:43,003 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 307 transitions. [2021-10-13 08:02:43,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-13 08:02:43,005 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:02:43,005 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:02:43,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:43,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:02:43,219 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:02:43,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:02:43,220 INFO L82 PathProgramCache]: Analyzing trace with hash -230061377, now seen corresponding path program 2 times [2021-10-13 08:02:43,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:02:43,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055311485] [2021-10-13 08:02:43,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:02:43,221 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:02:43,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:02:43,221 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:02:43,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-10-13 08:02:44,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 08:02:44,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:02:44,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 08:02:44,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:44,355 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-10-13 08:02:44,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-10-13 08:02:44,555 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:02:44,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055311485] [2021-10-13 08:02:44,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055311485] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:02:44,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:02:44,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 08:02:44,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304354868] [2021-10-13 08:02:44,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:02:44,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:02:44,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:02:44,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:02:44,557 INFO L87 Difference]: Start difference. First operand 256 states and 307 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:44,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:02:44,611 INFO L93 Difference]: Finished difference Result 256 states and 307 transitions. [2021-10-13 08:02:44,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:02:44,612 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-10-13 08:02:44,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:02:44,613 INFO L225 Difference]: With dead ends: 256 [2021-10-13 08:02:44,614 INFO L226 Difference]: Without dead ends: 253 [2021-10-13 08:02:44,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:02:44,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-10-13 08:02:44,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2021-10-13 08:02:44,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 251 states have (on average 1.203187250996016) internal successors, (302), 252 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:44,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 302 transitions. [2021-10-13 08:02:44,643 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 302 transitions. Word has length 56 [2021-10-13 08:02:44,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:02:44,644 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 302 transitions. [2021-10-13 08:02:44,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:44,644 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 302 transitions. [2021-10-13 08:02:44,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-13 08:02:44,645 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:02:44,646 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:02:44,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:44,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:02:44,862 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:02:44,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:02:44,863 INFO L82 PathProgramCache]: Analyzing trace with hash 481078808, now seen corresponding path program 1 times [2021-10-13 08:02:44,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:02:44,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763218746] [2021-10-13 08:02:44,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:44,863 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:02:44,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:02:44,864 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:02:44,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-10-13 08:02:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:45,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 08:02:45,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:46,164 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:46,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:46,666 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:02:46,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763218746] [2021-10-13 08:02:46,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763218746] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:02:46,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1773852134] [2021-10-13 08:02:46,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:46,666 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:02:46,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:02:46,667 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:02:46,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2021-10-13 08:02:48,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:48,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 08:02:48,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:48,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:48,561 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:48,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1773852134] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:02:48,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121587169] [2021-10-13 08:02:48,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:48,562 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:02:48,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:02:48,562 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:02:48,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-10-13 08:02:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:49,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 08:02:49,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:50,765 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:50,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:51,068 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-10-13 08:02:51,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121587169] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 08:02:51,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-13 08:02:51,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 14, 14, 14, 20] total 44 [2021-10-13 08:02:51,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597147099] [2021-10-13 08:02:51,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 08:02:51,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:02:51,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 08:02:51,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=1412, Unknown=0, NotChecked=0, Total=1892 [2021-10-13 08:02:51,070 INFO L87 Difference]: Start difference. First operand 253 states and 302 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:51,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:02:51,637 INFO L93 Difference]: Finished difference Result 359 states and 424 transitions. [2021-10-13 08:02:51,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 08:02:51,638 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 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 59 [2021-10-13 08:02:51,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:02:51,640 INFO L225 Difference]: With dead ends: 359 [2021-10-13 08:02:51,640 INFO L226 Difference]: Without dead ends: 357 [2021-10-13 08:02:51,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1346.4ms TimeCoverageRelationStatistics Valid=624, Invalid=1826, Unknown=0, NotChecked=0, Total=2450 [2021-10-13 08:02:51,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-10-13 08:02:51,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 230. [2021-10-13 08:02:51,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.1746724890829694) internal successors, (269), 229 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:51,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 269 transitions. [2021-10-13 08:02:51,662 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 269 transitions. Word has length 59 [2021-10-13 08:02:51,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:02:51,662 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 269 transitions. [2021-10-13 08:02:51,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:51,662 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 269 transitions. [2021-10-13 08:02:51,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-13 08:02:51,663 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:02:51,663 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:02:51,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-10-13 08:02:51,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:52,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (59)] Ended with exit code 0 [2021-10-13 08:02:52,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:02:52,264 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-10-13 08:02:52,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:02:52,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1178374559, now seen corresponding path program 2 times [2021-10-13 08:02:52,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:02:52,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1984844701] [2021-10-13 08:02:52,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:02:52,265 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:02:52,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:02:52,266 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:02:52,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-10-13 08:02:53,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 08:02:53,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:02:53,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 08:02:53,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:53,624 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-10-13 08:02:53,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-10-13 08:02:53,865 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:02:53,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1984844701] [2021-10-13 08:02:53,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1984844701] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:02:53,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:02:53,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 08:02:53,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603056058] [2021-10-13 08:02:53,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:02:53,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:02:53,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:02:53,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:02:53,867 INFO L87 Difference]: Start difference. First operand 230 states and 269 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:53,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:02:53,925 INFO L93 Difference]: Finished difference Result 230 states and 269 transitions. [2021-10-13 08:02:53,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:02:53,925 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-10-13 08:02:53,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:02:53,925 INFO L225 Difference]: With dead ends: 230 [2021-10-13 08:02:53,925 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 08:02:53,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:02:53,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 08:02:53,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 08:02:53,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:53,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 08:02:53,927 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 70 [2021-10-13 08:02:53,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:02:53,927 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 08:02:53,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:53,928 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 08:02:53,928 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 08:02:53,930 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:02:53,930 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:02:53,930 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:02:53,930 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:02:53,931 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:02:53,931 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:02:53,931 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:02:53,931 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:02:53,931 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:02:53,931 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:02:53,931 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:02:53,931 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:02:53,932 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:02:53,932 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:02:53,932 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:02:53,932 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:02:53,932 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:02:53,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (61)] Ended with exit code 0 [2021-10-13 08:02:54,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:02:54,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 08:02:54,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:02:54,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:02:56,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:02:57,103 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:02:57,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:02:57,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:03:02,264 INFO L857 garLoopResultBuilder]: For program point L225(line 225) no Hoare annotation was computed. [2021-10-13 08:03:02,264 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION(line 189) no Hoare annotation was computed. [2021-10-13 08:03:02,264 INFO L857 garLoopResultBuilder]: For program point L349(lines 349 358) no Hoare annotation was computed. [2021-10-13 08:03:02,264 INFO L853 garLoopResultBuilder]: At program point L250(lines 102 252) the Hoare annotation is: (and (bvsle (bvadd ULTIMATE.start_main_~main__t~0 (_ bv1 32)) ULTIMATE.start_main_~main__tagbuf_len~0) (= ULTIMATE.start_main_~__VERIFIER_assert__cond~1 (_ bv1 32)) (bvsle (_ bv0 32) ULTIMATE.start_main_~main__t~0) (= ULTIMATE.start_main_~__VERIFIER_assert__cond~0 (_ bv1 32)) (bvsge (bvadd ULTIMATE.start_main_~main__tagbuf_len~0 (_ bv1 32)) (_ bv1 32)) (bvsle ULTIMATE.start_main_~main__t~0 ULTIMATE.start_main_~main__tagbuf_len~0)) [2021-10-13 08:03:02,264 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 56) no Hoare annotation was computed. [2021-10-13 08:03:02,264 INFO L857 garLoopResultBuilder]: For program point L85(line 85) no Hoare annotation was computed. [2021-10-13 08:03:02,265 INFO L857 garLoopResultBuilder]: For program point L308(lines 308 316) no Hoare annotation was computed. [2021-10-13 08:03:02,265 INFO L857 garLoopResultBuilder]: For program point L143(line 143) no Hoare annotation was computed. [2021-10-13 08:03:02,265 INFO L857 garLoopResultBuilder]: For program point L44(line 44) no Hoare annotation was computed. [2021-10-13 08:03:02,265 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION(line 279) no Hoare annotation was computed. [2021-10-13 08:03:02,265 INFO L857 garLoopResultBuilder]: For program point L102(lines 102 252) no Hoare annotation was computed. [2021-10-13 08:03:02,265 INFO L857 garLoopResultBuilder]: For program point L325(lines 325 362) no Hoare annotation was computed. [2021-10-13 08:03:02,265 INFO L857 garLoopResultBuilder]: For program point L127(line 127) no Hoare annotation was computed. [2021-10-13 08:03:02,266 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION(line 115) no Hoare annotation was computed. [2021-10-13 08:03:02,266 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 08:03:02,266 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-13 08:03:02,266 INFO L857 garLoopResultBuilder]: For program point L20(lines 20 374) no Hoare annotation was computed. [2021-10-13 08:03:02,266 INFO L857 garLoopResultBuilder]: For program point L177(line 177) no Hoare annotation was computed. [2021-10-13 08:03:02,266 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION(line 339) no Hoare annotation was computed. [2021-10-13 08:03:02,266 INFO L857 garLoopResultBuilder]: For program point L235(lines 235 243) no Hoare annotation was computed. [2021-10-13 08:03:02,267 INFO L857 garLoopResultBuilder]: For program point L351(line 351) no Hoare annotation was computed. [2021-10-13 08:03:02,267 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION(line 237) no Hoare annotation was computed. [2021-10-13 08:03:02,267 INFO L857 garLoopResultBuilder]: For program point L153(lines 153 161) no Hoare annotation was computed. [2021-10-13 08:03:02,267 INFO L857 garLoopResultBuilder]: For program point L54(lines 54 254) no Hoare annotation was computed. [2021-10-13 08:03:02,267 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 85) no Hoare annotation was computed. [2021-10-13 08:03:02,268 INFO L857 garLoopResultBuilder]: For program point L310(line 310) no Hoare annotation was computed. [2021-10-13 08:03:02,268 INFO L857 garLoopResultBuilder]: For program point L277(lines 277 364) no Hoare annotation was computed. [2021-10-13 08:03:02,268 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION(line 310) no Hoare annotation was computed. [2021-10-13 08:03:02,268 INFO L857 garLoopResultBuilder]: For program point L71(lines 71 95) no Hoare annotation was computed. [2021-10-13 08:03:02,268 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION(line 143) no Hoare annotation was computed. [2021-10-13 08:03:02,268 INFO L857 garLoopResultBuilder]: For program point L187(lines 187 197) no Hoare annotation was computed. [2021-10-13 08:03:02,269 INFO L857 garLoopResultBuilder]: For program point L113(lines 113 204) no Hoare annotation was computed. [2021-10-13 08:03:02,269 INFO L857 garLoopResultBuilder]: For program point L237(line 237) no Hoare annotation was computed. [2021-10-13 08:03:02,269 INFO L853 garLoopResultBuilder]: At program point L328(lines 32 368) the Hoare annotation is: (let ((.cse3 (= ULTIMATE.start_main_~main__t~0 (_ bv0 32))) (.cse2 (bvsge (bvadd ULTIMATE.start_main_~main__tagbuf_len~0 (_ bv1 32)) (_ bv1 32)))) (let ((.cse0 (bvsle (bvadd ULTIMATE.start_main_~main__t~0 (_ bv1 32)) ULTIMATE.start_main_~main__tagbuf_len~0)) (.cse1 (or (and .cse3 .cse2) (= ULTIMATE.start_main_~__VERIFIER_assert__cond~13 (_ bv1 32))))) (or (and .cse0 .cse1 (= ULTIMATE.start_main_~main__t~0 (_ bv1 32)) .cse2) (and .cse0 (= ULTIMATE.start_main_~__VERIFIER_assert__cond~17 (_ bv1 32)) (bvsle (_ bv0 32) ULTIMATE.start_main_~main__t~0) .cse1 (= ULTIMATE.start_main_~__VERIFIER_assert__cond~16 (_ bv1 32)) .cse2 (bvsle ULTIMATE.start_main_~main__t~0 ULTIMATE.start_main_~main__tagbuf_len~0)) (and (not (= ULTIMATE.start_main_~main__tagbuf_len~0 ULTIMATE.start_main_~main__t~0)) .cse3 .cse2)))) [2021-10-13 08:03:02,269 INFO L853 garLoopResultBuilder]: At program point L196(lines 60 254) the Hoare annotation is: (let ((.cse2 (bvadd ULTIMATE.start_main_~main__tagbuf_len~0 (_ bv1 32)))) (let ((.cse0 (= ULTIMATE.start_main_~__VERIFIER_assert__cond~1 (_ bv1 32))) (.cse1 (= ULTIMATE.start_main_~__VERIFIER_assert__cond~0 (_ bv1 32))) (.cse3 (bvsge .cse2 (_ bv1 32))) (.cse4 (bvsle ULTIMATE.start_main_~main__t~0 ULTIMATE.start_main_~main__tagbuf_len~0))) (or (and .cse0 (= ULTIMATE.start_main_~main__t~0 (_ bv1 32)) .cse1 (not (= .cse2 ULTIMATE.start_main_~main__t~0)) .cse3) (and .cse0 .cse1 .cse3 (= (_ bv3 32) ULTIMATE.start_main_~main__t~0) .cse4) (and .cse3 (let ((.cse5 (bvsle (_ bv0 32) ULTIMATE.start_main_~main__t~0)) (.cse6 (not (= ULTIMATE.start_main_~__VERIFIER_assert__cond~0 (_ bv0 32))))) (or (and .cse0 .cse5 (= ULTIMATE.start_main_~__VERIFIER_assert__cond~16 (_ bv1 32)) .cse1 .cse6 .cse4) (and .cse0 .cse5 .cse1 (not (= ULTIMATE.start_main_~__VERIFIER_assert__cond~8 (_ bv0 32))) .cse6 .cse4)))) (and .cse0 .cse1 (= (_ bv2 32) ULTIMATE.start_main_~main__t~0) .cse3 .cse4)))) [2021-10-13 08:03:02,269 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION(line 127) no Hoare annotation was computed. [2021-10-13 08:03:02,270 INFO L857 garLoopResultBuilder]: For program point L155(line 155) no Hoare annotation was computed. [2021-10-13 08:03:02,270 INFO L857 garLoopResultBuilder]: For program point L56(line 56) no Hoare annotation was computed. [2021-10-13 08:03:02,270 INFO L857 garLoopResultBuilder]: For program point L279(line 279) no Hoare annotation was computed. [2021-10-13 08:03:02,270 INFO L857 garLoopResultBuilder]: For program point L337(lines 337 360) no Hoare annotation was computed. [2021-10-13 08:03:02,270 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION(line 351) no Hoare annotation was computed. [2021-10-13 08:03:02,270 INFO L857 garLoopResultBuilder]: For program point L106(lines 106 210) no Hoare annotation was computed. [2021-10-13 08:03:02,271 INFO L857 garLoopResultBuilder]: For program point L73(line 73) no Hoare annotation was computed. [2021-10-13 08:03:02,271 INFO L857 garLoopResultBuilder]: For program point L296(lines 296 318) no Hoare annotation was computed. [2021-10-13 08:03:02,271 INFO L857 garLoopResultBuilder]: For program point L32(lines 32 368) no Hoare annotation was computed. [2021-10-13 08:03:02,271 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-13 08:03:02,271 INFO L857 garLoopResultBuilder]: For program point L189(line 189) no Hoare annotation was computed. [2021-10-13 08:03:02,271 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION(line 177) no Hoare annotation was computed. [2021-10-13 08:03:02,272 INFO L857 garLoopResultBuilder]: For program point L24(lines 24 369) no Hoare annotation was computed. [2021-10-13 08:03:02,272 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 44) no Hoare annotation was computed. [2021-10-13 08:03:02,272 INFO L857 garLoopResultBuilder]: For program point L115(line 115) no Hoare annotation was computed. [2021-10-13 08:03:02,272 INFO L857 garLoopResultBuilder]: For program point L289(lines 289 363) no Hoare annotation was computed. [2021-10-13 08:03:02,272 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 08:03:02,272 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION(line 155) no Hoare annotation was computed. [2021-10-13 08:03:02,273 INFO L857 garLoopResultBuilder]: For program point L223(lines 223 245) no Hoare annotation was computed. [2021-10-13 08:03:02,273 INFO L857 garLoopResultBuilder]: For program point L83(lines 83 93) no Hoare annotation was computed. [2021-10-13 08:03:02,273 INFO L857 garLoopResultBuilder]: For program point L339(line 339) no Hoare annotation was computed. [2021-10-13 08:03:02,273 INFO L857 garLoopResultBuilder]: For program point L141(lines 141 163) no Hoare annotation was computed. [2021-10-13 08:03:02,273 INFO L857 garLoopResultBuilder]: For program point L42(lines 42 256) no Hoare annotation was computed. [2021-10-13 08:03:02,273 INFO L857 garLoopResultBuilder]: For program point L298(line 298) no Hoare annotation was computed. [2021-10-13 08:03:02,274 INFO L857 garLoopResultBuilder]: For program point L125(lines 125 202) no Hoare annotation was computed. [2021-10-13 08:03:02,274 INFO L860 garLoopResultBuilder]: At program point L315(lines 32 368) the Hoare annotation is: true [2021-10-13 08:03:02,274 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION(line 225) no Hoare annotation was computed. [2021-10-13 08:03:02,274 INFO L857 garLoopResultBuilder]: For program point L216(lines 216 251) no Hoare annotation was computed. [2021-10-13 08:03:02,274 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 73) no Hoare annotation was computed. [2021-10-13 08:03:02,274 INFO L860 garLoopResultBuilder]: At program point L373(lines 15 375) the Hoare annotation is: true [2021-10-13 08:03:02,275 INFO L857 garLoopResultBuilder]: For program point L175(lines 175 199) no Hoare annotation was computed. [2021-10-13 08:03:02,275 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION(line 298) no Hoare annotation was computed. [2021-10-13 08:03:02,275 INFO L857 garLoopResultBuilder]: For program point L266(lines 266 366) no Hoare annotation was computed. [2021-10-13 08:03:02,275 INFO L857 garLoopResultBuilder]: For program point L134(lines 134 201) no Hoare annotation was computed. [2021-10-13 08:03:02,275 INFO L853 garLoopResultBuilder]: At program point L357(lines 283 364) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~__VERIFIER_assert__cond~13 (_ bv1 32))) (.cse1 (bvsge (bvadd ULTIMATE.start_main_~main__tagbuf_len~0 (_ bv1 32)) (_ bv1 32)))) (or (and (= ULTIMATE.start_main_~__VERIFIER_assert__cond~12 (_ bv1 32)) (not (= ULTIMATE.start_main_~main__tagbuf_len~0 ULTIMATE.start_main_~main__t~0)) (= ULTIMATE.start_main_~main__t~0 (_ bv0 32)) .cse0 .cse1) (and (bvsle (bvadd ULTIMATE.start_main_~main__t~0 (_ bv1 32)) ULTIMATE.start_main_~main__tagbuf_len~0) (= ULTIMATE.start_main_~__VERIFIER_assert__cond~17 (_ bv1 32)) (bvsle (_ bv0 32) ULTIMATE.start_main_~main__t~0) (= ULTIMATE.start_main_~__VERIFIER_assert__cond~16 (_ bv1 32)) .cse0 .cse1 (bvsle ULTIMATE.start_main_~main__t~0 ULTIMATE.start_main_~main__tagbuf_len~0)))) [2021-10-13 08:03:02,280 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 08:03:02,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 08:03:02 BoogieIcfgContainer [2021-10-13 08:03:02,302 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 08:03:02,302 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 08:03:02,303 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 08:03:02,303 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 08:03:02,303 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:01:20" (3/4) ... [2021-10-13 08:03:02,307 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 08:03:02,321 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-13 08:03:02,322 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 08:03:02,322 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 08:03:02,323 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 08:03:02,384 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 08:03:02,384 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 08:03:02,386 INFO L168 Benchmark]: Toolchain (without parser) took 103608.70 ms. Allocated memory was 60.8 MB in the beginning and 304.1 MB in the end (delta: 243.3 MB). Free memory was 40.3 MB in the beginning and 89.4 MB in the end (delta: -49.2 MB). Peak memory consumption was 193.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:03:02,387 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 60.8 MB. Free memory is still 41.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:03:02,387 INFO L168 Benchmark]: CACSL2BoogieTranslator took 461.33 ms. Allocated memory is still 60.8 MB. Free memory was 40.0 MB in the beginning and 40.5 MB in the end (delta: -485.3 kB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-13 08:03:02,387 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.76 ms. Allocated memory is still 60.8 MB. Free memory was 40.5 MB in the beginning and 38.6 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:03:02,388 INFO L168 Benchmark]: Boogie Preprocessor took 68.65 ms. Allocated memory is still 60.8 MB. Free memory was 38.4 MB in the beginning and 37.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:03:02,388 INFO L168 Benchmark]: RCFGBuilder took 653.90 ms. Allocated memory was 60.8 MB in the beginning and 75.5 MB in the end (delta: 14.7 MB). Free memory was 37.0 MB in the beginning and 54.4 MB in the end (delta: -17.4 MB). Peak memory consumption was 16.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:03:02,389 INFO L168 Benchmark]: TraceAbstraction took 102271.61 ms. Allocated memory was 75.5 MB in the beginning and 304.1 MB in the end (delta: 228.6 MB). Free memory was 54.1 MB in the beginning and 95.7 MB in the end (delta: -41.6 MB). Peak memory consumption was 235.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:03:02,389 INFO L168 Benchmark]: Witness Printer took 82.17 ms. Allocated memory is still 304.1 MB. Free memory was 95.7 MB in the beginning and 89.4 MB in the end (delta: 6.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:03:02,391 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 60.8 MB. Free memory is still 41.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 461.33 ms. Allocated memory is still 60.8 MB. Free memory was 40.0 MB in the beginning and 40.5 MB in the end (delta: -485.3 kB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 62.76 ms. Allocated memory is still 60.8 MB. Free memory was 40.5 MB in the beginning and 38.6 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 68.65 ms. Allocated memory is still 60.8 MB. Free memory was 38.4 MB in the beginning and 37.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 653.90 ms. Allocated memory was 60.8 MB in the beginning and 75.5 MB in the end (delta: 14.7 MB). Free memory was 37.0 MB in the beginning and 54.4 MB in the end (delta: -17.4 MB). Peak memory consumption was 16.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 102271.61 ms. Allocated memory was 75.5 MB in the beginning and 304.1 MB in the end (delta: 228.6 MB). Free memory was 54.1 MB in the beginning and 95.7 MB in the end (delta: -41.6 MB). Peak memory consumption was 235.4 MB. Max. memory is 16.1 GB. * Witness Printer took 82.17 ms. Allocated memory is still 304.1 MB. Free memory was 95.7 MB in the beginning and 89.4 MB in the end (delta: 6.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 44]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 56]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 73]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 85]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 115]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 127]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 143]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 155]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 177]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 189]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 225]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 237]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 279]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 298]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 310]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 339]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 351]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 71 locations, 17 error locations. Started 1 CEGAR loops. OverallTime: 102173.9ms, OverallIterations: 34, TraceHistogramMax: 10, EmptinessCheckTime: 51.0ms, AutomataDifference: 24678.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 8130.3ms, InitialAbstractionConstructionTime: 14.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1469 SDtfs, 12737 SDslu, 7087 SDs, 0 SdLazy, 10188 SolverSat, 2011 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10576.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3330 GetRequests, 2616 SyntacticMatches, 0 SemanticMatches, 714 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7167 ImplicationChecksByTransitivity, 18171.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=261occurred in iteration=29, InterpolantAutomatonStates: 481, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 614.5ms AutomataMinimizationTime, 34 MinimizatonAttempts, 2598 StatesRemovedByMinimization, 31 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 60 NumberOfFragments, 254 HoareAnnotationTreeSize, 6 FomulaSimplifications, 617686522222 FormulaSimplificationTreeSizeReduction, 3155.4ms HoareSimplificationTime, 6 FomulaSimplificationsInter, 646847392 FormulaSimplificationTreeSizeReductionInter, 4964.9ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 683.7ms SsaConstructionTime, 2186.8ms SatisfiabilityAnalysisTime, 24319.6ms InterpolantComputationTime, 1577 NumberOfCodeBlocks, 1442 NumberOfCodeBlocksAsserted, 63 NumberOfCheckSat, 3034 ConstructedInterpolants, 9 QuantifiedInterpolants, 12919 SizeOfPredicates, 241 NumberOfNonLiveVariables, 4756 ConjunctsInSsa, 612 ConjunctsInUnsatCore, 120 InterpolantComputations, 48 PerfectInterpolantSequences, 1146/2912 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 17 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 102]: Loop Invariant Derived loop invariant: ((((~bvsle32(~bvadd64(main__t, 1bv32), main__tagbuf_len) && __VERIFIER_assert__cond == 1bv32) && ~bvsle32(0bv32, main__t)) && __VERIFIER_assert__cond == 1bv32) && ~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 1bv32)) && ~bvsle32(main__t, main__tagbuf_len) - InvariantResult [Line: 60]: Loop Invariant Derived loop invariant: ((((((__VERIFIER_assert__cond == 1bv32 && main__t == 1bv32) && __VERIFIER_assert__cond == 1bv32) && !(~bvadd64(main__tagbuf_len, 1bv32) == main__t)) && ~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 1bv32)) || ((((__VERIFIER_assert__cond == 1bv32 && __VERIFIER_assert__cond == 1bv32) && ~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 1bv32)) && 3bv32 == main__t) && ~bvsle32(main__t, main__tagbuf_len))) || (~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 1bv32) && ((((((__VERIFIER_assert__cond == 1bv32 && ~bvsle32(0bv32, main__t)) && __VERIFIER_assert__cond == 1bv32) && __VERIFIER_assert__cond == 1bv32) && !(__VERIFIER_assert__cond == 0bv32)) && ~bvsle32(main__t, main__tagbuf_len)) || (((((__VERIFIER_assert__cond == 1bv32 && ~bvsle32(0bv32, main__t)) && __VERIFIER_assert__cond == 1bv32) && !(__VERIFIER_assert__cond == 0bv32)) && !(__VERIFIER_assert__cond == 0bv32)) && ~bvsle32(main__t, main__tagbuf_len))))) || ((((__VERIFIER_assert__cond == 1bv32 && __VERIFIER_assert__cond == 1bv32) && 2bv32 == main__t) && ~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 1bv32)) && ~bvsle32(main__t, main__tagbuf_len)) - InvariantResult [Line: 283]: Loop Invariant Derived loop invariant: ((((__VERIFIER_assert__cond == 1bv32 && !(main__tagbuf_len == main__t)) && main__t == 0bv32) && __VERIFIER_assert__cond == 1bv32) && ~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 1bv32)) || ((((((~bvsle32(~bvadd64(main__t, 1bv32), main__tagbuf_len) && __VERIFIER_assert__cond == 1bv32) && ~bvsle32(0bv32, main__t)) && __VERIFIER_assert__cond == 1bv32) && __VERIFIER_assert__cond == 1bv32) && ~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 1bv32)) && ~bvsle32(main__t, main__tagbuf_len)) - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: ((((~bvsle32(~bvadd64(main__t, 1bv32), main__tagbuf_len) && ((main__t == 0bv32 && ~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 1bv32)) || __VERIFIER_assert__cond == 1bv32)) && main__t == 1bv32) && ~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 1bv32)) || ((((((~bvsle32(~bvadd64(main__t, 1bv32), main__tagbuf_len) && __VERIFIER_assert__cond == 1bv32) && ~bvsle32(0bv32, main__t)) && ((main__t == 0bv32 && ~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 1bv32)) || __VERIFIER_assert__cond == 1bv32)) && __VERIFIER_assert__cond == 1bv32) && ~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 1bv32)) && ~bvsle32(main__t, main__tagbuf_len))) || ((!(main__tagbuf_len == main__t) && main__t == 0bv32) && ~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 1bv32)) - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-13 08:03:02,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb2ee7f-bbf3-48d1-94d6-746655d7f37f/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...