./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-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_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/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_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/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_9a5945c9-4578-44c1-a303-d598aaff8915/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 5b57e964dbb610d8a39ef60225ec1dbb75ce4568 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/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_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/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_9a5945c9-4578-44c1-a303-d598aaff8915/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 5b57e964dbb610d8a39ef60225ec1dbb75ce4568 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 07:24:43,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:24:43,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:24:43,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:24:43,943 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:24:43,947 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:24:43,949 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:24:43,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:24:43,957 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:24:43,962 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:24:43,964 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:24:43,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:24:43,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:24:43,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:24:43,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:24:43,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:24:43,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:24:43,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:24:43,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:24:43,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:24:43,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:24:43,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:24:43,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:24:43,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:24:44,001 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:24:44,001 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:24:44,002 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:24:44,003 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:24:44,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:24:44,005 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:24:44,006 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:24:44,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:24:44,008 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:24:44,009 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:24:44,010 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:24:44,010 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:24:44,011 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:24:44,011 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:24:44,012 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:24:44,013 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:24:44,013 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:24:44,014 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:24:44,040 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:24:44,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:24:44,042 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:24:44,042 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:24:44,042 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:24:44,042 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:24:44,043 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:24:44,043 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:24:44,043 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:24:44,043 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:24:44,044 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:24:44,044 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:24:44,044 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:24:44,044 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:24:44,045 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:24:44,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:24:44,046 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:24:44,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:24:44,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:24:44,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:24:44,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:24:44,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:24:44,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:24:44,047 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:24:44,048 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:24:44,048 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:24:44,048 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:24:44,048 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:24:44,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:24:44,049 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:24:44,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:24:44,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:24:44,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:24:44,050 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:24:44,050 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:24:44,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:24:44,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:24:44,051 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:24:44,051 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:24:44,051 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_9a5945c9-4578-44c1-a303-d598aaff8915/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b57e964dbb610d8a39ef60225ec1dbb75ce4568 [2021-10-13 07:24:44,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:24:44,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:24:44,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:24:44,392 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:24:44,393 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:24:44,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c [2021-10-13 07:24:44,453 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/data/5993c17b7/8cf2fd399ec84d94bc834d68bc3b4ae3/FLAG60f6b3092 [2021-10-13 07:24:44,905 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:24:44,906 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c [2021-10-13 07:24:44,914 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/data/5993c17b7/8cf2fd399ec84d94bc834d68bc3b4ae3/FLAG60f6b3092 [2021-10-13 07:24:45,278 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/data/5993c17b7/8cf2fd399ec84d94bc834d68bc3b4ae3 [2021-10-13 07:24:45,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:24:45,282 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:24:45,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:24:45,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:24:45,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:24:45,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:24:45" (1/1) ... [2021-10-13 07:24:45,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1be7917d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:24:45, skipping insertion in model container [2021-10-13 07:24:45,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:24:45" (1/1) ... [2021-10-13 07:24:45,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:24:45,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:24:45,520 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[1224,1237] [2021-10-13 07:24:45,525 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[1636,1649] [2021-10-13 07:24:45,527 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[1851,1864] [2021-10-13 07:24:45,530 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[2384,2397] [2021-10-13 07:24:45,533 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[2599,2612] [2021-10-13 07:24:45,536 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[2901,2914] [2021-10-13 07:24:45,538 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[3116,3129] [2021-10-13 07:24:45,540 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[3386,3399] [2021-10-13 07:24:45,544 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[3604,3617] [2021-10-13 07:24:45,547 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[4088,4101] [2021-10-13 07:24:45,558 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[4306,4319] [2021-10-13 07:24:45,562 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[4802,4815] [2021-10-13 07:24:45,567 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[5203,5216] [2021-10-13 07:24:45,570 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[5421,5434] [2021-10-13 07:24:45,575 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[5792,5805] [2021-10-13 07:24:45,577 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[6010,6023] [2021-10-13 07:24:45,578 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[6296,6309] [2021-10-13 07:24:45,580 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[6514,6527] [2021-10-13 07:24:45,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:24:45,591 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:24:45,607 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[1224,1237] [2021-10-13 07:24:45,609 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[1636,1649] [2021-10-13 07:24:45,611 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[1851,1864] [2021-10-13 07:24:45,613 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[2384,2397] [2021-10-13 07:24:45,616 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[2599,2612] [2021-10-13 07:24:45,628 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[2901,2914] [2021-10-13 07:24:45,629 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[3116,3129] [2021-10-13 07:24:45,631 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[3386,3399] [2021-10-13 07:24:45,632 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[3604,3617] [2021-10-13 07:24:45,634 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[4088,4101] [2021-10-13 07:24:45,635 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[4306,4319] [2021-10-13 07:24:45,638 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[4802,4815] [2021-10-13 07:24:45,645 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[5203,5216] [2021-10-13 07:24:45,647 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[5421,5434] [2021-10-13 07:24:45,649 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[5792,5805] [2021-10-13 07:24:45,654 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[6010,6023] [2021-10-13 07:24:45,656 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[6296,6309] [2021-10-13 07:24:45,657 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[6514,6527] [2021-10-13 07:24:45,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:24:45,679 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:24:45,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:24:45 WrapperNode [2021-10-13 07:24:45,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:24:45,685 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:24:45,685 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:24:45,685 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:24:45,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:24:45" (1/1) ... [2021-10-13 07:24:45,715 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:24:45" (1/1) ... [2021-10-13 07:24:45,748 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:24:45,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:24:45,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:24:45,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:24:45,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:24:45" (1/1) ... [2021-10-13 07:24:45,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:24:45" (1/1) ... [2021-10-13 07:24:45,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:24:45" (1/1) ... [2021-10-13 07:24:45,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:24:45" (1/1) ... [2021-10-13 07:24:45,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:24:45" (1/1) ... [2021-10-13 07:24:45,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:24:45" (1/1) ... [2021-10-13 07:24:45,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:24:45" (1/1) ... [2021-10-13 07:24:45,813 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:24:45,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:24:45,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:24:45,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:24:45,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:24:45" (1/1) ... [2021-10-13 07:24:45,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:24:45,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:24:45,894 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:24:45,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:24:45,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:24:45,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:24:45,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:24:45,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:24:46,415 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:24:46,415 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-13 07:24:46,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:24:46 BoogieIcfgContainer [2021-10-13 07:24:46,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:24:46,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:24:46,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:24:46,423 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:24:46,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:24:45" (1/3) ... [2021-10-13 07:24:46,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2edb839a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:24:46, skipping insertion in model container [2021-10-13 07:24:46,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:24:45" (2/3) ... [2021-10-13 07:24:46,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2edb839a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:24:46, skipping insertion in model container [2021-10-13 07:24:46,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:24:46" (3/3) ... [2021-10-13 07:24:46,426 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i.v+lhb-reducer.c [2021-10-13 07:24:46,432 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:24:46,432 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2021-10-13 07:24:46,477 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:24:46,483 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 07:24:46,483 INFO L340 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2021-10-13 07:24:46,500 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 54 states have (on average 1.8888888888888888) internal successors, (102), 72 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 07:24:46,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:24:46,505 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:46,519 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:46,520 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:24:46,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:46,527 INFO L82 PathProgramCache]: Analyzing trace with hash -101219053, now seen corresponding path program 1 times [2021-10-13 07:24:46,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:24:46,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808526604] [2021-10-13 07:24:46,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:46,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:24:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:46,756 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 07:24:46,756 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:24:46,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808526604] [2021-10-13 07:24:46,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808526604] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:24:46,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:24:46,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 07:24:46,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341667067] [2021-10-13 07:24:46,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:24:46,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:24:46,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:24:46,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:24:46,787 INFO L87 Difference]: Start difference. First operand has 73 states, 54 states have (on average 1.8888888888888888) internal successors, (102), 72 states have internal predecessors, (102), 0 states have call successors, (0), 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 07:24:46,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:46,980 INFO L93 Difference]: Finished difference Result 118 states and 159 transitions. [2021-10-13 07:24:46,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:24:46,982 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 07:24:46,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:46,992 INFO L225 Difference]: With dead ends: 118 [2021-10-13 07:24:46,992 INFO L226 Difference]: Without dead ends: 106 [2021-10-13 07:24:46,995 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:24:47,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-13 07:24:47,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 68. [2021-10-13 07:24:47,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 51 states have (on average 1.411764705882353) internal successors, (72), 67 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:47,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2021-10-13 07:24:47,069 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 7 [2021-10-13 07:24:47,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:47,070 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2021-10-13 07:24:47,070 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 07:24:47,070 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2021-10-13 07:24:47,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:24:47,071 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:47,071 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:47,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:24:47,072 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:24:47,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:47,073 INFO L82 PathProgramCache]: Analyzing trace with hash -104789997, now seen corresponding path program 1 times [2021-10-13 07:24:47,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:24:47,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221013169] [2021-10-13 07:24:47,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:47,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:24:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:47,162 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 07:24:47,162 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:24:47,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221013169] [2021-10-13 07:24:47,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221013169] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:24:47,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:24:47,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 07:24:47,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329622801] [2021-10-13 07:24:47,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:24:47,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:24:47,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:24:47,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:24:47,167 INFO L87 Difference]: Start difference. First operand 68 states and 72 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 07:24:47,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:47,234 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2021-10-13 07:24:47,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:24:47,235 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 07:24:47,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:47,237 INFO L225 Difference]: With dead ends: 106 [2021-10-13 07:24:47,237 INFO L226 Difference]: Without dead ends: 104 [2021-10-13 07:24:47,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:24:47,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-13 07:24:47,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 66. [2021-10-13 07:24:47,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 50 states have (on average 1.4) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:47,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-10-13 07:24:47,250 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 7 [2021-10-13 07:24:47,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:47,250 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-10-13 07:24:47,251 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 07:24:47,251 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-10-13 07:24:47,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:24:47,252 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:47,252 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:47,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:24:47,252 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:24:47,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:47,253 INFO L82 PathProgramCache]: Analyzing trace with hash -345778017, now seen corresponding path program 1 times [2021-10-13 07:24:47,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:24:47,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057526991] [2021-10-13 07:24:47,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:47,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:24:47,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:47,346 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 07:24:47,346 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:24:47,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057526991] [2021-10-13 07:24:47,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057526991] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:24:47,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:24:47,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 07:24:47,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910823822] [2021-10-13 07:24:47,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:24:47,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:24:47,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:24:47,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:24:47,350 INFO L87 Difference]: Start difference. First operand 66 states and 70 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 07:24:47,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:47,442 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2021-10-13 07:24:47,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:24:47,442 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 07:24:47,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:47,444 INFO L225 Difference]: With dead ends: 68 [2021-10-13 07:24:47,444 INFO L226 Difference]: Without dead ends: 66 [2021-10-13 07:24:47,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:24:47,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-13 07:24:47,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2021-10-13 07:24:47,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 49 states have (on average 1.3877551020408163) 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 07:24:47,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-10-13 07:24:47,453 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 10 [2021-10-13 07:24:47,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:47,454 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-10-13 07:24:47,454 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 07:24:47,454 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-10-13 07:24:47,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:24:47,455 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:47,455 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:47,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:24:47,456 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:24:47,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:47,457 INFO L82 PathProgramCache]: Analyzing trace with hash 646297484, now seen corresponding path program 1 times [2021-10-13 07:24:47,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:24:47,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488823520] [2021-10-13 07:24:47,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:47,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:24:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:47,516 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 07:24:47,516 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:24:47,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488823520] [2021-10-13 07:24:47,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488823520] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:24:47,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:24:47,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 07:24:47,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573182622] [2021-10-13 07:24:47,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:24:47,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:24:47,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:24:47,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:24:47,520 INFO L87 Difference]: Start difference. First operand 64 states and 68 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 07:24:47,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:47,607 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2021-10-13 07:24:47,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:24:47,608 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 07:24:47,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:47,609 INFO L225 Difference]: With dead ends: 66 [2021-10-13 07:24:47,609 INFO L226 Difference]: Without dead ends: 64 [2021-10-13 07:24:47,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:24:47,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-13 07:24:47,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2021-10-13 07:24:47,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 48 states have (on average 1.375) 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 07:24:47,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-10-13 07:24:47,617 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 10 [2021-10-13 07:24:47,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:47,617 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-10-13 07:24:47,617 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 07:24:47,618 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-10-13 07:24:47,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:24:47,618 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:47,619 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:47,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 07:24:47,619 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:24:47,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:47,620 INFO L82 PathProgramCache]: Analyzing trace with hash -2129179748, now seen corresponding path program 1 times [2021-10-13 07:24:47,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:24:47,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244259841] [2021-10-13 07:24:47,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:47,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:24:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:47,701 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 07:24:47,701 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:24:47,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244259841] [2021-10-13 07:24:47,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244259841] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:24:47,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:24:47,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 07:24:47,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013712139] [2021-10-13 07:24:47,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:24:47,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:24:47,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:24:47,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:24:47,705 INFO L87 Difference]: Start difference. First operand 62 states and 66 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 07:24:47,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:47,780 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2021-10-13 07:24:47,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:24:47,781 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 07:24:47,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:47,789 INFO L225 Difference]: With dead ends: 64 [2021-10-13 07:24:47,790 INFO L226 Difference]: Without dead ends: 60 [2021-10-13 07:24:47,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:24:47,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-13 07:24:47,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2021-10-13 07:24:47,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:47,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2021-10-13 07:24:47,797 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 11 [2021-10-13 07:24:47,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:47,798 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2021-10-13 07:24:47,798 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 07:24:47,798 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2021-10-13 07:24:47,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:24:47,799 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:47,799 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:47,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 07:24:47,800 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:24:47,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:47,808 INFO L82 PathProgramCache]: Analyzing trace with hash -2128691176, now seen corresponding path program 1 times [2021-10-13 07:24:47,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:24:47,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998094821] [2021-10-13 07:24:47,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:47,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:24:47,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:47,921 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 07:24:47,921 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:24:47,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998094821] [2021-10-13 07:24:47,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998094821] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:24:47,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:24:47,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 07:24:47,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131481320] [2021-10-13 07:24:47,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:24:47,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:24:47,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:24:47,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:24:47,930 INFO L87 Difference]: Start difference. First operand 58 states and 62 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 07:24:48,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:48,068 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2021-10-13 07:24:48,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:24:48,068 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 07:24:48,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:48,069 INFO L225 Difference]: With dead ends: 94 [2021-10-13 07:24:48,069 INFO L226 Difference]: Without dead ends: 92 [2021-10-13 07:24:48,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:24:48,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-13 07:24:48,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 56. [2021-10-13 07:24:48,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:48,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-10-13 07:24:48,086 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 11 [2021-10-13 07:24:48,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:48,087 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-10-13 07:24:48,087 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 07:24:48,087 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-10-13 07:24:48,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:24:48,089 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:48,089 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:48,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 07:24:48,090 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:24:48,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:48,090 INFO L82 PathProgramCache]: Analyzing trace with hash -2128675288, now seen corresponding path program 1 times [2021-10-13 07:24:48,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:24:48,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690251809] [2021-10-13 07:24:48,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:48,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:24:48,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:48,189 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 07:24:48,189 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:24:48,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690251809] [2021-10-13 07:24:48,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690251809] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:24:48,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:24:48,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 07:24:48,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612111655] [2021-10-13 07:24:48,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:24:48,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:24:48,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:24:48,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:24:48,192 INFO L87 Difference]: Start difference. First operand 56 states and 60 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 07:24:48,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:48,308 INFO L93 Difference]: Finished difference Result 99 states and 106 transitions. [2021-10-13 07:24:48,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:24:48,308 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 07:24:48,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:48,311 INFO L225 Difference]: With dead ends: 99 [2021-10-13 07:24:48,311 INFO L226 Difference]: Without dead ends: 97 [2021-10-13 07:24:48,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:24:48,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-10-13 07:24:48,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 54. [2021-10-13 07:24:48,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 53 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:48,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-10-13 07:24:48,329 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 11 [2021-10-13 07:24:48,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:48,329 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-10-13 07:24:48,330 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 07:24:48,330 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-10-13 07:24:48,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:24:48,330 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:48,331 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:48,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 07:24:48,331 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:24:48,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:48,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1439610404, now seen corresponding path program 1 times [2021-10-13 07:24:48,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:24:48,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391649460] [2021-10-13 07:24:48,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:48,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:24:48,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:48,385 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:24:48,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391649460] [2021-10-13 07:24:48,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391649460] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:24:48,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:24:48,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 07:24:48,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634786080] [2021-10-13 07:24:48,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:24:48,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:24:48,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:24:48,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:24:48,388 INFO L87 Difference]: Start difference. First operand 54 states and 58 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 07:24:48,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:48,447 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2021-10-13 07:24:48,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:24:48,448 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 07:24:48,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:48,449 INFO L225 Difference]: With dead ends: 56 [2021-10-13 07:24:48,449 INFO L226 Difference]: Without dead ends: 52 [2021-10-13 07:24:48,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:24:48,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-13 07:24:48,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-10-13 07:24:48,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.35) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 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 07:24:48,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-10-13 07:24:48,459 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 11 [2021-10-13 07:24:48,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:48,460 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-10-13 07:24:48,461 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 07:24:48,461 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-10-13 07:24:48,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:24:48,462 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:48,462 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:48,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 07:24:48,462 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:24:48,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:48,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1564912810, now seen corresponding path program 1 times [2021-10-13 07:24:48,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:24:48,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169091719] [2021-10-13 07:24:48,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:48,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:24:48,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:48,646 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:24:48,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169091719] [2021-10-13 07:24:48,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169091719] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:24:48,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:24:48,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 07:24:48,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279638208] [2021-10-13 07:24:48,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:24:48,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:24:48,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:24:48,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:24:48,651 INFO L87 Difference]: Start difference. First operand 50 states and 54 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 07:24:48,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:48,785 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2021-10-13 07:24:48,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:24:48,785 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 07:24:48,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:48,787 INFO L225 Difference]: With dead ends: 117 [2021-10-13 07:24:48,787 INFO L226 Difference]: Without dead ends: 115 [2021-10-13 07:24:48,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:24:48,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-13 07:24:48,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 55. [2021-10-13 07:24:48,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 54 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:48,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2021-10-13 07:24:48,802 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 12 [2021-10-13 07:24:48,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:48,803 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2021-10-13 07:24:48,803 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 07:24:48,803 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2021-10-13 07:24:48,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:24:48,807 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:48,807 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:48,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-13 07:24:48,808 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:24:48,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:48,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1564420266, now seen corresponding path program 1 times [2021-10-13 07:24:48,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:24:48,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101795484] [2021-10-13 07:24:48,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:48,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:24:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:48,952 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 07:24:48,952 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:24:48,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101795484] [2021-10-13 07:24:48,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101795484] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:24:48,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:24:48,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 07:24:48,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821248339] [2021-10-13 07:24:48,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:24:48,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:24:48,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:24:48,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:24:48,955 INFO L87 Difference]: Start difference. First operand 55 states and 60 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 07:24:49,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:49,094 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2021-10-13 07:24:49,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:24:49,094 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 07:24:49,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:49,095 INFO L225 Difference]: With dead ends: 115 [2021-10-13 07:24:49,095 INFO L226 Difference]: Without dead ends: 113 [2021-10-13 07:24:49,096 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:24:49,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-13 07:24:49,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 57. [2021-10-13 07:24:49,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 56 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:49,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2021-10-13 07:24:49,105 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 12 [2021-10-13 07:24:49,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:49,105 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2021-10-13 07:24:49,106 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 07:24:49,106 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2021-10-13 07:24:49,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:24:49,106 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:49,107 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:49,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-13 07:24:49,108 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:24:49,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:49,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1661195103, now seen corresponding path program 1 times [2021-10-13 07:24:49,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:24:49,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640554565] [2021-10-13 07:24:49,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:49,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:24:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:49,170 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 07:24:49,170 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:24:49,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640554565] [2021-10-13 07:24:49,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640554565] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:24:49,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:24:49,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 07:24:49,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500674125] [2021-10-13 07:24:49,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:24:49,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:24:49,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:24:49,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:24:49,174 INFO L87 Difference]: Start difference. First operand 57 states and 62 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 07:24:49,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:49,240 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2021-10-13 07:24:49,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:24:49,241 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 07:24:49,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:49,246 INFO L225 Difference]: With dead ends: 75 [2021-10-13 07:24:49,246 INFO L226 Difference]: Without dead ends: 73 [2021-10-13 07:24:49,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:24:49,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-13 07:24:49,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 55. [2021-10-13 07:24:49,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 54 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:49,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2021-10-13 07:24:49,252 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 12 [2021-10-13 07:24:49,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:49,252 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2021-10-13 07:24:49,252 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 07:24:49,252 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2021-10-13 07:24:49,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:24:49,254 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:49,254 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:49,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-13 07:24:49,257 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:24:49,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:49,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1659471199, now seen corresponding path program 1 times [2021-10-13 07:24:49,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:24:49,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636800801] [2021-10-13 07:24:49,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:49,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:24:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:49,318 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 07:24:49,319 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:24:49,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636800801] [2021-10-13 07:24:49,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636800801] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:24:49,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:24:49,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 07:24:49,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179331974] [2021-10-13 07:24:49,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:24:49,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:24:49,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:24:49,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:24:49,321 INFO L87 Difference]: Start difference. First operand 55 states and 60 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 07:24:49,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:49,383 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-10-13 07:24:49,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:24:49,383 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 07:24:49,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:49,384 INFO L225 Difference]: With dead ends: 56 [2021-10-13 07:24:49,384 INFO L226 Difference]: Without dead ends: 54 [2021-10-13 07:24:49,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:24:49,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-13 07:24:49,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-10-13 07:24:49,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.288888888888889) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:49,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2021-10-13 07:24:49,389 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 12 [2021-10-13 07:24:49,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:49,389 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2021-10-13 07:24:49,389 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 07:24:49,389 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2021-10-13 07:24:49,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 07:24:49,390 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:49,391 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:49,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-13 07:24:49,391 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:24:49,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:49,392 INFO L82 PathProgramCache]: Analyzing trace with hash 42563455, now seen corresponding path program 1 times [2021-10-13 07:24:49,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:24:49,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434508684] [2021-10-13 07:24:49,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:49,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:24:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:49,535 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:24:49,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434508684] [2021-10-13 07:24:49,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434508684] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:24:49,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:24:49,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 07:24:49,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976195145] [2021-10-13 07:24:49,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:24:49,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:24:49,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:24:49,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:24:49,540 INFO L87 Difference]: Start difference. First operand 53 states and 58 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 07:24:49,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:49,649 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2021-10-13 07:24:49,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:24:49,649 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 07:24:49,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:49,651 INFO L225 Difference]: With dead ends: 91 [2021-10-13 07:24:49,651 INFO L226 Difference]: Without dead ends: 89 [2021-10-13 07:24:49,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:24:49,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-13 07:24:49,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 59. [2021-10-13 07:24:49,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 51 states have (on average 1.2941176470588236) 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 07:24:49,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-10-13 07:24:49,657 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 13 [2021-10-13 07:24:49,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:49,659 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-10-13 07:24:49,659 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 07:24:49,659 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-10-13 07:24:49,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 07:24:49,661 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:49,661 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:49,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-13 07:24:49,662 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:24:49,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:49,663 INFO L82 PathProgramCache]: Analyzing trace with hash 44110600, now seen corresponding path program 1 times [2021-10-13 07:24:49,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:24:49,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154304720] [2021-10-13 07:24:49,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:49,664 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:24:49,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:49,711 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 07:24:49,711 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:24:49,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154304720] [2021-10-13 07:24:49,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154304720] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:24:49,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:24:49,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 07:24:49,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317311178] [2021-10-13 07:24:49,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:24:49,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:24:49,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:24:49,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:24:49,713 INFO L87 Difference]: Start difference. First operand 59 states and 66 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 07:24:49,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:49,791 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2021-10-13 07:24:49,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:24:49,792 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 07:24:49,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:49,793 INFO L225 Difference]: With dead ends: 79 [2021-10-13 07:24:49,793 INFO L226 Difference]: Without dead ends: 77 [2021-10-13 07:24:49,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:24:49,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-13 07:24:49,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 57. [2021-10-13 07:24:49,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.28) internal successors, (64), 56 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:49,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2021-10-13 07:24:49,799 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 13 [2021-10-13 07:24:49,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:49,800 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2021-10-13 07:24:49,800 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 07:24:49,800 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2021-10-13 07:24:49,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 07:24:49,800 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:49,800 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:49,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-13 07:24:49,801 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:24:49,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:49,801 INFO L82 PathProgramCache]: Analyzing trace with hash 96004535, now seen corresponding path program 1 times [2021-10-13 07:24:49,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:24:49,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072663697] [2021-10-13 07:24:49,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:49,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:24:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:49,911 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 07:24:49,911 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:24:49,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072663697] [2021-10-13 07:24:49,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072663697] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:24:49,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:24:49,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 07:24:49,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101426707] [2021-10-13 07:24:49,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:24:49,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:24:49,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:24:49,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:24:49,913 INFO L87 Difference]: Start difference. First operand 57 states and 64 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 07:24:49,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:49,994 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2021-10-13 07:24:49,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:24:49,995 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 07:24:49,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:49,995 INFO L225 Difference]: With dead ends: 69 [2021-10-13 07:24:49,996 INFO L226 Difference]: Without dead ends: 65 [2021-10-13 07:24:49,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:24:49,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-13 07:24:50,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2021-10-13 07:24:50,002 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 07:24:50,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2021-10-13 07:24:50,002 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 13 [2021-10-13 07:24:50,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:50,003 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2021-10-13 07:24:50,003 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 07:24:50,003 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2021-10-13 07:24:50,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:24:50,004 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:50,004 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:50,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-13 07:24:50,004 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:24:50,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:50,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1367432731, now seen corresponding path program 1 times [2021-10-13 07:24:50,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:24:50,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574922330] [2021-10-13 07:24:50,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:50,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:24:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:50,120 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 07:24:50,120 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:24:50,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574922330] [2021-10-13 07:24:50,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574922330] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:24:50,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:24:50,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 07:24:50,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404587083] [2021-10-13 07:24:50,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:24:50,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:24:50,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:24:50,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:24:50,124 INFO L87 Difference]: Start difference. First operand 58 states and 65 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 07:24:50,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:50,244 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2021-10-13 07:24:50,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:24:50,245 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 07:24:50,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:50,245 INFO L225 Difference]: With dead ends: 86 [2021-10-13 07:24:50,245 INFO L226 Difference]: Without dead ends: 84 [2021-10-13 07:24:50,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:24:50,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-13 07:24:50,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2021-10-13 07:24:50,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 60 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 07:24:50,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2021-10-13 07:24:50,251 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 14 [2021-10-13 07:24:50,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:50,252 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2021-10-13 07:24:50,252 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 07:24:50,252 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2021-10-13 07:24:50,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 07:24:50,253 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:50,253 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:50,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-13 07:24:50,253 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:24:50,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:50,254 INFO L82 PathProgramCache]: Analyzing trace with hash -2046065374, now seen corresponding path program 1 times [2021-10-13 07:24:50,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:24:50,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717070998] [2021-10-13 07:24:50,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:50,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:24:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:50,287 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 07:24:50,287 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:24:50,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717070998] [2021-10-13 07:24:50,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717070998] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:24:50,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:24:50,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 07:24:50,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139947577] [2021-10-13 07:24:50,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:24:50,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:24:50,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:24:50,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:24:50,290 INFO L87 Difference]: Start difference. First operand 61 states and 68 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 07:24:50,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:50,320 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2021-10-13 07:24:50,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:24:50,321 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 07:24:50,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:50,321 INFO L225 Difference]: With dead ends: 61 [2021-10-13 07:24:50,321 INFO L226 Difference]: Without dead ends: 59 [2021-10-13 07:24:50,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:24:50,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-13 07:24:50,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-10-13 07:24:50,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.2452830188679245) 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 07:24:50,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-10-13 07:24:50,328 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 15 [2021-10-13 07:24:50,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:50,328 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-10-13 07:24:50,328 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 07:24:50,329 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-10-13 07:24:50,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:24:50,329 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:50,329 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:50,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-13 07:24:50,330 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:24:50,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:50,330 INFO L82 PathProgramCache]: Analyzing trace with hash 996486959, now seen corresponding path program 1 times [2021-10-13 07:24:50,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:24:50,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157866534] [2021-10-13 07:24:50,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:50,331 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:24:50,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:50,363 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 07:24:50,363 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:24:50,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157866534] [2021-10-13 07:24:50,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157866534] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:24:50,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:24:50,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 07:24:50,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801375278] [2021-10-13 07:24:50,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:24:50,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:24:50,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:24:50,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:24:50,366 INFO L87 Difference]: Start difference. First operand 59 states and 66 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 07:24:50,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:50,405 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2021-10-13 07:24:50,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:24:50,406 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 07:24:50,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:50,407 INFO L225 Difference]: With dead ends: 59 [2021-10-13 07:24:50,407 INFO L226 Difference]: Without dead ends: 55 [2021-10-13 07:24:50,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:24:50,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-13 07:24:50,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-10-13 07:24:50,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.24) internal successors, (62), 54 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:50,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-10-13 07:24:50,412 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 16 [2021-10-13 07:24:50,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:50,413 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-10-13 07:24:50,414 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 07:24:50,414 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-10-13 07:24:50,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 07:24:50,414 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:50,414 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:50,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-13 07:24:50,415 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:24:50,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:50,415 INFO L82 PathProgramCache]: Analyzing trace with hash 321012073, now seen corresponding path program 1 times [2021-10-13 07:24:50,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:24:50,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473475100] [2021-10-13 07:24:50,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:50,416 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:24:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:50,492 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:24:50,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473475100] [2021-10-13 07:24:50,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473475100] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:24:50,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817297215] [2021-10-13 07:24:50,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:50,492 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:24:50,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:24:50,498 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:24:50,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:24:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:50,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:24:50,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:24:51,056 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 07:24:51,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:24:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:24:51,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817297215] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:24:51,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [729313627] [2021-10-13 07:24:51,195 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-10-13 07:24:51,195 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:24:51,200 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:24:51,217 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:24:51,218 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:24:51,256 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:24:51,259 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:24:51,260 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:24:51,261 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 07:24:51,262 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:24:51,262 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:24:51,263 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 07:24:51,266 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-10-13 07:24:51,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:24:51,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:24:51,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:24:51,308 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 07:24:51,309 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:24:51,309 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 07:24:51,310 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:24:51,310 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 07:24:51,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:24:51,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:24:51,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:24:51,323 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:24:51,327 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-10-13 07:24:51,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:24:51,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:136, output treesize:139 [2021-10-13 07:24:51,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:24:51,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:24:51,553 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 07:24:51,557 INFO L168 Benchmark]: Toolchain (without parser) took 6275.26 ms. Allocated memory was 88.1 MB in the beginning and 130.0 MB in the end (delta: 41.9 MB). Free memory was 49.5 MB in the beginning and 80.3 MB in the end (delta: -30.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:24:51,558 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 88.1 MB. Free memory was 66.0 MB in the beginning and 66.0 MB in the end (delta: 29.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:24:51,558 INFO L168 Benchmark]: CACSL2BoogieTranslator took 396.65 ms. Allocated memory is still 88.1 MB. Free memory was 49.3 MB in the beginning and 58.9 MB in the end (delta: -9.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:24:51,558 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.08 ms. Allocated memory is still 88.1 MB. Free memory was 58.9 MB in the beginning and 56.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:24:51,559 INFO L168 Benchmark]: Boogie Preprocessor took 74.17 ms. Allocated memory is still 88.1 MB. Free memory was 56.9 MB in the beginning and 55.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:24:51,559 INFO L168 Benchmark]: RCFGBuilder took 594.40 ms. Allocated memory is still 88.1 MB. Free memory was 55.5 MB in the beginning and 40.2 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:24:51,559 INFO L168 Benchmark]: TraceAbstraction took 5136.88 ms. Allocated memory was 88.1 MB in the beginning and 130.0 MB in the end (delta: 41.9 MB). Free memory was 39.7 MB in the beginning and 80.3 MB in the end (delta: -40.6 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:24:51,561 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 88.1 MB. Free memory was 66.0 MB in the beginning and 66.0 MB in the end (delta: 29.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 396.65 ms. Allocated memory is still 88.1 MB. Free memory was 49.3 MB in the beginning and 58.9 MB in the end (delta: -9.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 63.08 ms. Allocated memory is still 88.1 MB. Free memory was 58.9 MB in the beginning and 56.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 74.17 ms. Allocated memory is still 88.1 MB. Free memory was 56.9 MB in the beginning and 55.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 594.40 ms. Allocated memory is still 88.1 MB. Free memory was 55.5 MB in the beginning and 40.2 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5136.88 ms. Allocated memory was 88.1 MB in the beginning and 130.0 MB in the end (delta: 41.9 MB). Free memory was 39.7 MB in the beginning and 80.3 MB in the end (delta: -40.6 MB). Peak memory consumption was 4.4 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 07:24:51,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:24:54,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:24:54,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:24:54,139 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:24:54,140 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:24:54,141 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:24:54,143 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:24:54,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:24:54,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:24:54,150 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:24:54,151 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:24:54,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:24:54,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:24:54,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:24:54,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:24:54,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:24:54,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:24:54,161 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:24:54,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:24:54,166 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:24:54,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:24:54,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:24:54,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:24:54,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:24:54,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:24:54,177 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:24:54,178 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:24:54,179 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:24:54,180 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:24:54,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:24:54,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:24:54,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:24:54,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:24:54,185 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:24:54,187 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:24:54,187 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:24:54,188 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:24:54,189 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:24:54,196 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:24:54,197 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:24:54,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:24:54,203 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:24:54,256 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:24:54,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:24:54,257 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:24:54,258 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:24:54,258 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:24:54,258 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:24:54,258 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:24:54,258 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:24:54,259 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:24:54,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:24:54,260 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:24:54,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:24:54,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:24:54,261 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:24:54,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:24:54,261 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:24:54,262 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:24:54,262 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:24:54,262 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:24:54,262 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:24:54,263 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:24:54,263 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:24:54,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:24:54,264 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:24:54,264 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:24:54,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:24:54,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:24:54,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:24:54,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:24:54,269 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:24:54,269 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:24:54,270 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:24:54,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:24:54,270 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:24:54,271 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:24:54,271 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_9a5945c9-4578-44c1-a303-d598aaff8915/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b57e964dbb610d8a39ef60225ec1dbb75ce4568 [2021-10-13 07:24:54,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:24:54,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:24:54,791 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:24:54,792 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:24:54,793 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:24:54,796 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c [2021-10-13 07:24:54,878 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/data/200f1f924/44d473cb3742482982d4d508bf8d53a7/FLAG20af0b2da [2021-10-13 07:24:55,518 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:24:55,519 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c [2021-10-13 07:24:55,527 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/data/200f1f924/44d473cb3742482982d4d508bf8d53a7/FLAG20af0b2da [2021-10-13 07:24:55,858 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/data/200f1f924/44d473cb3742482982d4d508bf8d53a7 [2021-10-13 07:24:55,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:24:55,862 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:24:55,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:24:55,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:24:55,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:24:55,885 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:24:55" (1/1) ... [2021-10-13 07:24:55,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6465bf9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:24:55, skipping insertion in model container [2021-10-13 07:24:55,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:24:55" (1/1) ... [2021-10-13 07:24:55,892 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:24:55,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:24:56,067 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[1224,1237] [2021-10-13 07:24:56,074 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[1636,1649] [2021-10-13 07:24:56,076 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[1851,1864] [2021-10-13 07:24:56,079 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[2384,2397] [2021-10-13 07:24:56,082 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[2599,2612] [2021-10-13 07:24:56,085 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[2901,2914] [2021-10-13 07:24:56,087 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[3116,3129] [2021-10-13 07:24:56,089 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[3386,3399] [2021-10-13 07:24:56,091 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[3604,3617] [2021-10-13 07:24:56,094 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[4088,4101] [2021-10-13 07:24:56,096 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[4306,4319] [2021-10-13 07:24:56,099 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[4802,4815] [2021-10-13 07:24:56,102 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[5203,5216] [2021-10-13 07:24:56,104 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[5421,5434] [2021-10-13 07:24:56,106 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[5792,5805] [2021-10-13 07:24:56,108 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[6010,6023] [2021-10-13 07:24:56,110 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[6296,6309] [2021-10-13 07:24:56,112 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[6514,6527] [2021-10-13 07:24:56,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:24:56,127 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:24:56,144 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[1224,1237] [2021-10-13 07:24:56,147 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[1636,1649] [2021-10-13 07:24:56,148 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[1851,1864] [2021-10-13 07:24:56,151 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[2384,2397] [2021-10-13 07:24:56,153 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[2599,2612] [2021-10-13 07:24:56,155 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[2901,2914] [2021-10-13 07:24:56,157 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[3116,3129] [2021-10-13 07:24:56,159 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[3386,3399] [2021-10-13 07:24:56,161 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[3604,3617] [2021-10-13 07:24:56,188 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[4088,4101] [2021-10-13 07:24:56,190 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[4306,4319] [2021-10-13 07:24:56,192 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[4802,4815] [2021-10-13 07:24:56,194 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[5203,5216] [2021-10-13 07:24:56,195 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[5421,5434] [2021-10-13 07:24:56,215 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[5792,5805] [2021-10-13 07:24:56,216 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[6010,6023] [2021-10-13 07:24:56,218 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[6296,6309] [2021-10-13 07:24:56,233 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_9a5945c9-4578-44c1-a303-d598aaff8915/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[6514,6527] [2021-10-13 07:24:56,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:24:56,258 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:24:56,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:24:56 WrapperNode [2021-10-13 07:24:56,259 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:24:56,260 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:24:56,260 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:24:56,260 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:24:56,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:24:56" (1/1) ... [2021-10-13 07:24:56,293 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:24:56" (1/1) ... [2021-10-13 07:24:56,345 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:24:56,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:24:56,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:24:56,348 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:24:56,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:24:56" (1/1) ... [2021-10-13 07:24:56,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:24:56" (1/1) ... [2021-10-13 07:24:56,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:24:56" (1/1) ... [2021-10-13 07:24:56,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:24:56" (1/1) ... [2021-10-13 07:24:56,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:24:56" (1/1) ... [2021-10-13 07:24:56,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:24:56" (1/1) ... [2021-10-13 07:24:56,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:24:56" (1/1) ... [2021-10-13 07:24:56,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:24:56,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:24:56,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:24:56,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:24:56,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:24:56" (1/1) ... [2021-10-13 07:24:56,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:24:56,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:24:56,459 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:24:56,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:24:56,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:24:56,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:24:56,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:24:56,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:24:57,018 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:24:57,018 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-13 07:24:57,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:24:57 BoogieIcfgContainer [2021-10-13 07:24:57,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:24:57,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:24:57,022 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:24:57,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:24:57,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:24:55" (1/3) ... [2021-10-13 07:24:57,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5042da0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:24:57, skipping insertion in model container [2021-10-13 07:24:57,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:24:56" (2/3) ... [2021-10-13 07:24:57,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5042da0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:24:57, skipping insertion in model container [2021-10-13 07:24:57,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:24:57" (3/3) ... [2021-10-13 07:24:57,042 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i.v+lhb-reducer.c [2021-10-13 07:24:57,047 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:24:57,048 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2021-10-13 07:24:57,106 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:24:57,116 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 07:24:57,116 INFO L340 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2021-10-13 07:24:57,142 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 56 states have (on average 1.8571428571428572) internal successors, (104), 74 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 07:24:57,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:24:57,154 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:57,155 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:57,156 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:24:57,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:57,163 INFO L82 PathProgramCache]: Analyzing trace with hash 123910062, now seen corresponding path program 1 times [2021-10-13 07:24:57,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:24:57,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393335647] [2021-10-13 07:24:57,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:57,188 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:24:57,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:24:57,195 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:24:57,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:24:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:57,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:24:57,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:24:57,550 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 07:24:57,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:24:57,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:57,653 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:24:57,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393335647] [2021-10-13 07:24:57,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393335647] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:24:57,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:24:57,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 07:24:57,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243142540] [2021-10-13 07:24:57,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:24:57,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:24:57,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:24:57,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:24:57,698 INFO L87 Difference]: Start difference. First operand has 75 states, 56 states have (on average 1.8571428571428572) internal successors, (104), 74 states have internal predecessors, (104), 0 states have call successors, (0), 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 07:24:57,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:57,990 INFO L93 Difference]: Finished difference Result 131 states and 170 transitions. [2021-10-13 07:24:57,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:24:57,992 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 07:24:57,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:58,003 INFO L225 Difference]: With dead ends: 131 [2021-10-13 07:24:58,003 INFO L226 Difference]: Without dead ends: 107 [2021-10-13 07:24:58,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:24:58,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-13 07:24:58,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 69. [2021-10-13 07:24:58,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 68 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 07:24:58,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2021-10-13 07:24:58,041 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 8 [2021-10-13 07:24:58,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:58,042 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2021-10-13 07:24:58,042 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 07:24:58,043 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2021-10-13 07:24:58,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:24:58,043 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:58,044 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:58,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:24:58,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:24:58,257 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:24:58,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:58,258 INFO L82 PathProgramCache]: Analyzing trace with hash 120339118, now seen corresponding path program 1 times [2021-10-13 07:24:58,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:24:58,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612337706] [2021-10-13 07:24:58,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:58,259 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:24:58,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:24:58,263 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:24:58,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:24:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:58,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:24:58,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:24:58,531 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 07:24:58,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:24:58,610 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 07:24:58,611 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:24:58,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612337706] [2021-10-13 07:24:58,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612337706] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:24:58,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:24:58,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 07:24:58,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220198527] [2021-10-13 07:24:58,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:24:58,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:24:58,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:24:58,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:24:58,630 INFO L87 Difference]: Start difference. First operand 69 states and 73 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 07:24:58,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:58,802 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2021-10-13 07:24:58,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:24:58,802 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 07:24:58,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:58,804 INFO L225 Difference]: With dead ends: 107 [2021-10-13 07:24:58,804 INFO L226 Difference]: Without dead ends: 105 [2021-10-13 07:24:58,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:24:58,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-13 07:24:58,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 67. [2021-10-13 07:24:58,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 51 states have (on average 1.392156862745098) internal successors, (71), 66 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:58,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2021-10-13 07:24:58,822 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 8 [2021-10-13 07:24:58,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:58,822 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2021-10-13 07:24:58,823 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 07:24:58,824 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2021-10-13 07:24:58,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:24:58,824 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:58,825 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:58,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:24:59,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:24:59,040 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:24:59,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:59,041 INFO L82 PathProgramCache]: Analyzing trace with hash 2031737892, now seen corresponding path program 1 times [2021-10-13 07:24:59,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:24:59,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31120382] [2021-10-13 07:24:59,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:59,042 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:24:59,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:24:59,048 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:24:59,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:24:59,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:59,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:24:59,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:24:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:59,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:24:59,260 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 07:24:59,261 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:24:59,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31120382] [2021-10-13 07:24:59,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [31120382] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:24:59,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:24:59,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 07:24:59,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120952679] [2021-10-13 07:24:59,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:24:59,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:24:59,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:24:59,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:24:59,267 INFO L87 Difference]: Start difference. First operand 67 states and 71 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 07:24:59,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:59,673 INFO L93 Difference]: Finished difference Result 232 states and 247 transitions. [2021-10-13 07:24:59,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 07:24:59,678 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 07:24:59,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:59,683 INFO L225 Difference]: With dead ends: 232 [2021-10-13 07:24:59,683 INFO L226 Difference]: Without dead ends: 230 [2021-10-13 07:24:59,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:24:59,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-10-13 07:24:59,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 80. [2021-10-13 07:24:59,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 64 states have (on average 1.453125) internal successors, (93), 79 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 07:24:59,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2021-10-13 07:24:59,706 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 11 [2021-10-13 07:24:59,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:59,707 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2021-10-13 07:24:59,707 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 07:24:59,707 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2021-10-13 07:24:59,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:24:59,708 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:59,708 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:59,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-13 07:24:59,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:24:59,921 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:24:59,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:59,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1271153903, now seen corresponding path program 1 times [2021-10-13 07:24:59,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:24:59,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228094072] [2021-10-13 07:24:59,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:59,923 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:24:59,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:24:59,924 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:24:59,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:25:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:00,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:25:00,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:00,081 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 07:25:00,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:00,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:25:00,160 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:00,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228094072] [2021-10-13 07:25:00,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228094072] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:00,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:00,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 07:25:00,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706759830] [2021-10-13 07:25:00,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:25:00,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:00,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:25:00,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:25:00,164 INFO L87 Difference]: Start difference. First operand 80 states and 93 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 07:25:00,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:00,496 INFO L93 Difference]: Finished difference Result 226 states and 241 transitions. [2021-10-13 07:25:00,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 07:25:00,497 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 07:25:00,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:00,500 INFO L225 Difference]: With dead ends: 226 [2021-10-13 07:25:00,500 INFO L226 Difference]: Without dead ends: 224 [2021-10-13 07:25:00,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:25:00,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-10-13 07:25:00,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 106. [2021-10-13 07:25:00,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 90 states have (on average 1.5444444444444445) internal successors, (139), 105 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:25:00,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2021-10-13 07:25:00,516 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 139 transitions. Word has length 11 [2021-10-13 07:25:00,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:00,517 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 139 transitions. [2021-10-13 07:25:00,517 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 07:25:00,517 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 139 transitions. [2021-10-13 07:25:00,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:25:00,518 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:00,518 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:00,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:00,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:00,730 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:25:00,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:00,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1440630601, now seen corresponding path program 1 times [2021-10-13 07:25:00,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:00,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602956914] [2021-10-13 07:25:00,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:00,732 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:00,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:00,733 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:00,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:25:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:00,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:25:00,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:00,983 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 07:25:00,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:01,045 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 07:25:01,046 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:01,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602956914] [2021-10-13 07:25:01,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602956914] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:01,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:01,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [] total 8 [2021-10-13 07:25:01,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835804374] [2021-10-13 07:25:01,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:25:01,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:01,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:25:01,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:25:01,049 INFO L87 Difference]: Start difference. First operand 106 states and 139 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 07:25:01,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:01,304 INFO L93 Difference]: Finished difference Result 134 states and 157 transitions. [2021-10-13 07:25:01,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:25:01,305 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 07:25:01,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:01,306 INFO L225 Difference]: With dead ends: 134 [2021-10-13 07:25:01,306 INFO L226 Difference]: Without dead ends: 128 [2021-10-13 07:25:01,307 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:25:01,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-13 07:25:01,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2021-10-13 07:25:01,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 87 states have (on average 1.5172413793103448) internal successors, (132), 101 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 07:25:01,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 132 transitions. [2021-10-13 07:25:01,318 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 132 transitions. Word has length 12 [2021-10-13 07:25:01,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:01,319 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 132 transitions. [2021-10-13 07:25:01,319 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 07:25:01,320 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 132 transitions. [2021-10-13 07:25:01,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:25:01,321 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:01,321 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:01,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:01,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:01,535 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:25:01,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:01,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1440142029, now seen corresponding path program 1 times [2021-10-13 07:25:01,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:01,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897081562] [2021-10-13 07:25:01,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:01,537 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:01,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:01,538 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:01,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 07:25:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:01,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:25:01,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:01,702 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 07:25:01,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:01,769 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 07:25:01,769 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:01,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897081562] [2021-10-13 07:25:01,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897081562] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:01,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:01,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 07:25:01,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732947677] [2021-10-13 07:25:01,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:25:01,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:01,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:25:01,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:25:01,772 INFO L87 Difference]: Start difference. First operand 102 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 07:25:02,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:02,120 INFO L93 Difference]: Finished difference Result 338 states and 361 transitions. [2021-10-13 07:25:02,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 07:25:02,121 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 07:25:02,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:02,124 INFO L225 Difference]: With dead ends: 338 [2021-10-13 07:25:02,124 INFO L226 Difference]: Without dead ends: 336 [2021-10-13 07:25:02,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:25:02,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-10-13 07:25:02,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 104. [2021-10-13 07:25:02,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 89 states have (on average 1.4943820224719102) internal successors, (133), 103 states have internal predecessors, (133), 0 states have call successors, (0), 0 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 07:25:02,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 133 transitions. [2021-10-13 07:25:02,145 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 133 transitions. Word has length 12 [2021-10-13 07:25:02,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:02,146 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 133 transitions. [2021-10-13 07:25:02,146 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 07:25:02,146 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 133 transitions. [2021-10-13 07:25:02,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:25:02,147 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:02,147 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:02,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:02,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:02,359 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:25:02,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:02,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1440126141, now seen corresponding path program 1 times [2021-10-13 07:25:02,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:02,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834717656] [2021-10-13 07:25:02,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:02,361 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:02,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:02,362 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:02,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 07:25:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:02,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:25:02,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:02,505 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 07:25:02,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:02,575 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 07:25:02,580 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:02,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834717656] [2021-10-13 07:25:02,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834717656] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:02,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:02,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 07:25:02,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77172440] [2021-10-13 07:25:02,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:25:02,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:02,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:25:02,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:25:02,586 INFO L87 Difference]: Start difference. First operand 104 states and 133 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 07:25:02,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:02,933 INFO L93 Difference]: Finished difference Result 310 states and 332 transitions. [2021-10-13 07:25:02,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 07:25:02,934 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 07:25:02,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:02,943 INFO L225 Difference]: With dead ends: 310 [2021-10-13 07:25:02,943 INFO L226 Difference]: Without dead ends: 308 [2021-10-13 07:25:02,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 69.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:25:02,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-10-13 07:25:02,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 105. [2021-10-13 07:25:02,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 90 states have (on average 1.4666666666666666) internal successors, (132), 104 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 07:25:02,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 132 transitions. [2021-10-13 07:25:02,954 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 132 transitions. Word has length 12 [2021-10-13 07:25:02,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:02,955 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 132 transitions. [2021-10-13 07:25:02,955 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 07:25:02,955 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 132 transitions. [2021-10-13 07:25:02,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:25:02,956 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:02,956 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:02,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:03,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:03,174 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:25:03,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:03,174 INFO L82 PathProgramCache]: Analyzing trace with hash -751061257, now seen corresponding path program 1 times [2021-10-13 07:25:03,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:03,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042795165] [2021-10-13 07:25:03,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:03,175 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:03,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:03,177 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:03,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 07:25:03,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:03,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:25:03,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:03,424 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 07:25:03,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:03,490 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 07:25:03,490 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:03,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042795165] [2021-10-13 07:25:03,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042795165] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:03,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:03,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [] total 8 [2021-10-13 07:25:03,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46156330] [2021-10-13 07:25:03,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:25:03,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:03,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:25:03,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:25:03,493 INFO L87 Difference]: Start difference. First operand 105 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 07:25:03,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:03,716 INFO L93 Difference]: Finished difference Result 125 states and 145 transitions. [2021-10-13 07:25:03,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:25:03,717 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 07:25:03,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:03,718 INFO L225 Difference]: With dead ends: 125 [2021-10-13 07:25:03,718 INFO L226 Difference]: Without dead ends: 119 [2021-10-13 07:25:03,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:25:03,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-13 07:25:03,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 101. [2021-10-13 07:25:03,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 87 states have (on average 1.4367816091954022) 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 07:25:03,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 125 transitions. [2021-10-13 07:25:03,724 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 125 transitions. Word has length 12 [2021-10-13 07:25:03,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:03,725 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 125 transitions. [2021-10-13 07:25:03,725 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 07:25:03,725 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 125 transitions. [2021-10-13 07:25:03,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 07:25:03,726 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:03,726 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:03,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:03,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:03,942 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:25:03,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:03,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1694725733, now seen corresponding path program 1 times [2021-10-13 07:25:03,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:03,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1203316653] [2021-10-13 07:25:03,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:03,943 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:03,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:03,944 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:03,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 07:25:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:04,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:25:04,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:25:04,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:04,475 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 07:25:04,475 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:04,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1203316653] [2021-10-13 07:25:04,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1203316653] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:04,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:04,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-10-13 07:25:04,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965186612] [2021-10-13 07:25:04,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:25:04,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:04,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:25:04,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:25:04,478 INFO L87 Difference]: Start difference. First operand 101 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 07:25:05,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:05,169 INFO L93 Difference]: Finished difference Result 158 states and 183 transitions. [2021-10-13 07:25:05,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 07:25:05,170 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 07:25:05,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:05,171 INFO L225 Difference]: With dead ends: 158 [2021-10-13 07:25:05,171 INFO L226 Difference]: Without dead ends: 156 [2021-10-13 07:25:05,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 313.8ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-10-13 07:25:05,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-13 07:25:05,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 99. [2021-10-13 07:25:05,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 86 states have (on average 1.4069767441860466) 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 07:25:05,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 121 transitions. [2021-10-13 07:25:05,178 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 121 transitions. Word has length 13 [2021-10-13 07:25:05,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:05,179 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 121 transitions. [2021-10-13 07:25:05,179 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 07:25:05,179 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 121 transitions. [2021-10-13 07:25:05,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 07:25:05,180 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:05,180 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:05,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:05,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:05,381 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:25:05,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:05,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1694233189, now seen corresponding path program 1 times [2021-10-13 07:25:05,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:05,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1145731615] [2021-10-13 07:25:05,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:05,382 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:05,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:05,384 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:05,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 07:25:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:05,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:25:05,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:05,740 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 07:25:05,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:05,940 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 07:25:05,941 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:05,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1145731615] [2021-10-13 07:25:05,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1145731615] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:05,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:05,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-10-13 07:25:05,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361190090] [2021-10-13 07:25:05,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:25:05,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:05,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:25:05,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:25:05,944 INFO L87 Difference]: Start difference. First operand 99 states and 121 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 07:25:06,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:06,700 INFO L93 Difference]: Finished difference Result 147 states and 166 transitions. [2021-10-13 07:25:06,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 07:25:06,701 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 07:25:06,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:06,702 INFO L225 Difference]: With dead ends: 147 [2021-10-13 07:25:06,702 INFO L226 Difference]: Without dead ends: 145 [2021-10-13 07:25:06,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 338.3ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-10-13 07:25:06,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-13 07:25:06,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 97. [2021-10-13 07:25:06,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 85 states have (on average 1.3764705882352941) internal successors, (117), 96 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:25:06,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2021-10-13 07:25:06,709 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 13 [2021-10-13 07:25:06,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:06,710 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2021-10-13 07:25:06,710 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 07:25:06,710 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2021-10-13 07:25:06,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 07:25:06,711 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:06,711 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:06,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:06,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:06,912 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:25:06,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:06,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1791008026, now seen corresponding path program 1 times [2021-10-13 07:25:06,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:06,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787925653] [2021-10-13 07:25:06,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:06,913 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:06,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:06,914 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:06,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 07:25:07,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:07,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:25:07,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:07,089 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 07:25:07,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:07,162 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 07:25:07,163 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:07,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787925653] [2021-10-13 07:25:07,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787925653] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:07,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:07,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 07:25:07,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788125176] [2021-10-13 07:25:07,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:25:07,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:07,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:25:07,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:25:07,165 INFO L87 Difference]: Start difference. First operand 97 states and 117 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 07:25:07,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:07,448 INFO L93 Difference]: Finished difference Result 233 states and 254 transitions. [2021-10-13 07:25:07,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 07:25:07,449 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 07:25:07,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:07,450 INFO L225 Difference]: With dead ends: 233 [2021-10-13 07:25:07,450 INFO L226 Difference]: Without dead ends: 231 [2021-10-13 07:25:07,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:25:07,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-10-13 07:25:07,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 100. [2021-10-13 07:25:07,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 88 states have (on average 1.375) internal successors, (121), 99 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 07:25:07,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2021-10-13 07:25:07,458 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 13 [2021-10-13 07:25:07,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:07,458 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2021-10-13 07:25:07,458 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 07:25:07,458 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2021-10-13 07:25:07,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 07:25:07,459 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:07,459 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:07,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:07,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:07,660 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:25:07,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:07,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1789284122, now seen corresponding path program 1 times [2021-10-13 07:25:07,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:07,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060169173] [2021-10-13 07:25:07,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:07,660 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:07,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:07,661 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:07,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 07:25:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:07,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:25:07,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:07,837 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 07:25:07,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:07,905 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 07:25:07,906 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:07,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060169173] [2021-10-13 07:25:07,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060169173] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:07,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:07,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 07:25:07,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127275299] [2021-10-13 07:25:07,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:25:07,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:07,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:25:07,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:25:07,910 INFO L87 Difference]: Start difference. First operand 100 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 07:25:08,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:08,152 INFO L93 Difference]: Finished difference Result 156 states and 171 transitions. [2021-10-13 07:25:08,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 07:25:08,152 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 07:25:08,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:08,158 INFO L225 Difference]: With dead ends: 156 [2021-10-13 07:25:08,158 INFO L226 Difference]: Without dead ends: 154 [2021-10-13 07:25:08,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:25:08,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-13 07:25:08,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 102. [2021-10-13 07:25:08,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 90 states have (on average 1.3777777777777778) internal successors, (124), 101 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 07:25:08,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 124 transitions. [2021-10-13 07:25:08,166 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 124 transitions. Word has length 13 [2021-10-13 07:25:08,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:08,168 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 124 transitions. [2021-10-13 07:25:08,169 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 07:25:08,169 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 124 transitions. [2021-10-13 07:25:08,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:25:08,172 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:08,172 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:08,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:08,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:08,385 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:25:08,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:08,386 INFO L82 PathProgramCache]: Analyzing trace with hash 313330138, now seen corresponding path program 1 times [2021-10-13 07:25:08,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:08,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467225959] [2021-10-13 07:25:08,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:08,386 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:08,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:08,388 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:08,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 07:25:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:08,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:25:08,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:08,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:25:08,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:08,931 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 07:25:08,931 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:08,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467225959] [2021-10-13 07:25:08,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467225959] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:08,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:08,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-10-13 07:25:08,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694874712] [2021-10-13 07:25:08,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:25:08,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:08,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:25:08,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:25:08,934 INFO L87 Difference]: Start difference. First operand 102 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 07:25:09,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:09,406 INFO L93 Difference]: Finished difference Result 142 states and 168 transitions. [2021-10-13 07:25:09,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 07:25:09,407 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 07:25:09,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:09,408 INFO L225 Difference]: With dead ends: 142 [2021-10-13 07:25:09,408 INFO L226 Difference]: Without dead ends: 140 [2021-10-13 07:25:09,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 275.2ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-10-13 07:25:09,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-13 07:25:09,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 100. [2021-10-13 07:25:09,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 89 states have (on average 1.3595505617977528) internal successors, (121), 99 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 07:25:09,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2021-10-13 07:25:09,416 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 14 [2021-10-13 07:25:09,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:09,416 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2021-10-13 07:25:09,417 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 07:25:09,417 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2021-10-13 07:25:09,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:25:09,417 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:09,418 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:09,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:09,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:09,630 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:25:09,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:09,631 INFO L82 PathProgramCache]: Analyzing trace with hash 314877283, now seen corresponding path program 1 times [2021-10-13 07:25:09,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:09,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359112951] [2021-10-13 07:25:09,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:09,631 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:09,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:09,636 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:09,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 07:25:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:09,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:25:09,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:09,853 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 07:25:09,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:09,925 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 07:25:09,925 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:09,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359112951] [2021-10-13 07:25:09,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1359112951] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:09,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:09,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 07:25:09,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634790352] [2021-10-13 07:25:09,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:25:09,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:09,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:25:09,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:25:09,927 INFO L87 Difference]: Start difference. First operand 100 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 07:25:10,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:10,241 INFO L93 Difference]: Finished difference Result 221 states and 244 transitions. [2021-10-13 07:25:10,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 07:25:10,242 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 07:25:10,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:10,243 INFO L225 Difference]: With dead ends: 221 [2021-10-13 07:25:10,244 INFO L226 Difference]: Without dead ends: 219 [2021-10-13 07:25:10,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:25:10,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-10-13 07:25:10,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 105. [2021-10-13 07:25:10,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 94 states have (on average 1.3297872340425532) internal successors, (125), 104 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 07:25:10,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 125 transitions. [2021-10-13 07:25:10,254 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 125 transitions. Word has length 14 [2021-10-13 07:25:10,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:10,254 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 125 transitions. [2021-10-13 07:25:10,254 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 07:25:10,254 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 125 transitions. [2021-10-13 07:25:10,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:25:10,255 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:10,255 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:10,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:10,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:10,468 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:25:10,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:10,468 INFO L82 PathProgramCache]: Analyzing trace with hash 366771218, now seen corresponding path program 1 times [2021-10-13 07:25:10,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:10,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120761320] [2021-10-13 07:25:10,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:10,468 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:10,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:10,469 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:10,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 07:25:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:10,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:25:10,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:10,819 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 07:25:10,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:11,003 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 07:25:11,003 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:11,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120761320] [2021-10-13 07:25:11,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120761320] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:11,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:11,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-10-13 07:25:11,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741197711] [2021-10-13 07:25:11,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:25:11,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:11,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:25:11,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:25:11,007 INFO L87 Difference]: Start difference. First operand 105 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 07:25:11,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:11,627 INFO L93 Difference]: Finished difference Result 109 states and 128 transitions. [2021-10-13 07:25:11,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 07:25:11,628 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 07:25:11,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:11,629 INFO L225 Difference]: With dead ends: 109 [2021-10-13 07:25:11,629 INFO L226 Difference]: Without dead ends: 103 [2021-10-13 07:25:11,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 274.6ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:25:11,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-10-13 07:25:11,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2021-10-13 07:25:11,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 100 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 07:25:11,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 118 transitions. [2021-10-13 07:25:11,639 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 118 transitions. Word has length 14 [2021-10-13 07:25:11,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:11,639 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 118 transitions. [2021-10-13 07:25:11,639 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 07:25:11,640 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 118 transitions. [2021-10-13 07:25:11,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 07:25:11,641 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:11,641 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:11,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:11,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:11,842 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:25:11,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:11,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1171265312, now seen corresponding path program 1 times [2021-10-13 07:25:11,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:11,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028177137] [2021-10-13 07:25:11,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:11,843 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:11,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:11,843 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:11,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 07:25:12,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:12,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:25:12,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:12,294 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 07:25:12,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:12,470 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 07:25:12,471 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:12,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028177137] [2021-10-13 07:25:12,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028177137] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:12,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:12,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-10-13 07:25:12,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762313521] [2021-10-13 07:25:12,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:25:12,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:12,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:25:12,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:25:12,473 INFO L87 Difference]: Start difference. First operand 101 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 07:25:12,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:12,968 INFO L93 Difference]: Finished difference Result 142 states and 166 transitions. [2021-10-13 07:25:12,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 07:25:12,969 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 07:25:12,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:12,970 INFO L225 Difference]: With dead ends: 142 [2021-10-13 07:25:12,970 INFO L226 Difference]: Without dead ends: 140 [2021-10-13 07:25:12,971 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 295.9ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-10-13 07:25:12,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-13 07:25:12,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2021-10-13 07:25:12,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 90 states have (on average 1.2666666666666666) internal successors, (114), 98 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 07:25:12,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2021-10-13 07:25:12,977 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 15 [2021-10-13 07:25:12,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:12,978 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2021-10-13 07:25:12,978 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 07:25:12,978 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2021-10-13 07:25:12,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:25:12,979 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:12,979 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:12,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:13,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:13,191 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:25:13,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:13,191 INFO L82 PathProgramCache]: Analyzing trace with hash 462679229, now seen corresponding path program 1 times [2021-10-13 07:25:13,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:13,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494984838] [2021-10-13 07:25:13,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:13,192 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:13,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:13,193 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:13,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 07:25:13,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:13,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:25:13,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:13,457 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 07:25:13,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:13,585 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 07:25:13,585 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:13,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494984838] [2021-10-13 07:25:13,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494984838] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:13,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:13,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-10-13 07:25:13,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373547979] [2021-10-13 07:25:13,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:25:13,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:13,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:25:13,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:25:13,588 INFO L87 Difference]: Start difference. First operand 99 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 07:25:14,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:14,000 INFO L93 Difference]: Finished difference Result 193 states and 215 transitions. [2021-10-13 07:25:14,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 07:25:14,001 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 07:25:14,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:14,003 INFO L225 Difference]: With dead ends: 193 [2021-10-13 07:25:14,003 INFO L226 Difference]: Without dead ends: 191 [2021-10-13 07:25:14,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 161.1ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-10-13 07:25:14,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-10-13 07:25:14,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 109. [2021-10-13 07:25:14,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 100 states have (on average 1.29) internal successors, (129), 108 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 07:25:14,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 129 transitions. [2021-10-13 07:25:14,012 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 129 transitions. Word has length 16 [2021-10-13 07:25:14,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:14,013 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 129 transitions. [2021-10-13 07:25:14,013 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 07:25:14,013 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 129 transitions. [2021-10-13 07:25:14,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 07:25:14,014 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:14,014 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 07:25:14,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:14,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:14,227 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:25:14,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:14,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1458158324, now seen corresponding path program 1 times [2021-10-13 07:25:14,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:14,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [278702754] [2021-10-13 07:25:14,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:14,228 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:14,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:14,229 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:14,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 07:25:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:14,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:25:14,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:14,637 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 07:25:14,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:14,709 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 07:25:14,710 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:14,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [278702754] [2021-10-13 07:25:14,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [278702754] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:14,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:14,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 4] imperfect sequences [] total 9 [2021-10-13 07:25:14,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451816055] [2021-10-13 07:25:14,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 07:25:14,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:14,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 07:25:14,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:25:14,712 INFO L87 Difference]: Start difference. First operand 109 states and 129 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 07:25:14,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:14,937 INFO L93 Difference]: Finished difference Result 111 states and 131 transitions. [2021-10-13 07:25:14,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 07:25:14,939 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 07:25:14,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:14,939 INFO L225 Difference]: With dead ends: 111 [2021-10-13 07:25:14,940 INFO L226 Difference]: Without dead ends: 105 [2021-10-13 07:25:14,940 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-13 07:25:14,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-13 07:25:14,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-10-13 07:25:14,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 97 states have (on average 1.2577319587628866) internal successors, (122), 104 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 07:25:14,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 122 transitions. [2021-10-13 07:25:14,948 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 122 transitions. Word has length 17 [2021-10-13 07:25:14,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:14,949 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 122 transitions. [2021-10-13 07:25:14,949 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 07:25:14,949 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 122 transitions. [2021-10-13 07:25:14,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 07:25:14,950 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:14,950 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 07:25:14,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:15,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:15,157 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:25:15,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:15,157 INFO L82 PathProgramCache]: Analyzing trace with hash 666878526, now seen corresponding path program 1 times [2021-10-13 07:25:15,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:15,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592782288] [2021-10-13 07:25:15,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:15,158 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:15,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:15,166 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:15,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-13 07:25:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:15,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:25:15,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:15,497 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 07:25:15,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:15,676 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 07:25:15,676 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:15,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592782288] [2021-10-13 07:25:15,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592782288] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:15,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [804229307] [2021-10-13 07:25:15,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:15,676 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:25:15,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:25:15,678 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:25:15,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-10-13 07:25:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:15,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:25:15,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:16,072 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 07:25:16,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:16,175 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 07:25:16,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [804229307] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:16,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381063719] [2021-10-13 07:25:16,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:16,175 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:25:16,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:25:16,181 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:25:16,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-13 07:25:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:16,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:25:16,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:16,831 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 07:25:16,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:17,262 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 07:25:17,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381063719] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:17,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:25:17,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 10] total 27 [2021-10-13 07:25:17,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789217013] [2021-10-13 07:25:17,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 07:25:17,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:17,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 07:25:17,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2021-10-13 07:25:17,266 INFO L87 Difference]: Start difference. First operand 105 states and 122 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 07:25:18,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:18,789 INFO L93 Difference]: Finished difference Result 314 states and 350 transitions. [2021-10-13 07:25:18,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 07:25:18,789 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 07:25:18,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:18,791 INFO L225 Difference]: With dead ends: 314 [2021-10-13 07:25:18,791 INFO L226 Difference]: Without dead ends: 306 [2021-10-13 07:25:18,792 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1124.6ms TimeCoverageRelationStatistics Valid=559, Invalid=1163, Unknown=0, NotChecked=0, Total=1722 [2021-10-13 07:25:18,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-10-13 07:25:18,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 188. [2021-10-13 07:25:18,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 180 states have (on average 1.3722222222222222) internal successors, (247), 187 states have internal predecessors, (247), 0 states have call successors, (0), 0 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 07:25:18,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 247 transitions. [2021-10-13 07:25:18,808 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 247 transitions. Word has length 25 [2021-10-13 07:25:18,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:18,809 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 247 transitions. [2021-10-13 07:25:18,809 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 07:25:18,809 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 247 transitions. [2021-10-13 07:25:18,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 07:25:18,810 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:18,810 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:18,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:19,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:19,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:19,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:19,413 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:25:19,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:19,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1464651411, now seen corresponding path program 1 times [2021-10-13 07:25:19,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:19,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [454734141] [2021-10-13 07:25:19,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:19,414 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:19,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:19,415 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:19,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-13 07:25:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:19,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:25:19,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:19,763 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 07:25:19,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:19,974 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 07:25:19,975 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:19,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [454734141] [2021-10-13 07:25:19,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [454734141] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:19,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [662866798] [2021-10-13 07:25:19,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:19,975 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:25:19,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:25:19,981 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:25:19,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-10-13 07:25:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:20,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:25:20,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:20,515 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 07:25:20,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:20,624 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 07:25:20,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [662866798] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:20,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823084188] [2021-10-13 07:25:20,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:20,624 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:25:20,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:25:20,626 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:25:20,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-13 07:25:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:20,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:25:20,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:21,283 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 07:25:21,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:21,676 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 07:25:21,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823084188] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:21,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:25:21,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 10] total 27 [2021-10-13 07:25:21,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908560662] [2021-10-13 07:25:21,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 07:25:21,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:21,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 07:25:21,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2021-10-13 07:25:21,679 INFO L87 Difference]: Start difference. First operand 188 states and 247 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 07:25:23,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:23,124 INFO L93 Difference]: Finished difference Result 296 states and 332 transitions. [2021-10-13 07:25:23,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 07:25:23,124 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 07:25:23,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:23,126 INFO L225 Difference]: With dead ends: 296 [2021-10-13 07:25:23,126 INFO L226 Difference]: Without dead ends: 288 [2021-10-13 07:25:23,127 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1171.7ms TimeCoverageRelationStatistics Valid=559, Invalid=1163, Unknown=0, NotChecked=0, Total=1722 [2021-10-13 07:25:23,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-10-13 07:25:23,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 192. [2021-10-13 07:25:23,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 184 states have (on average 1.3423913043478262) internal successors, (247), 191 states have internal predecessors, (247), 0 states have call successors, (0), 0 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 07:25:23,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 247 transitions. [2021-10-13 07:25:23,147 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 247 transitions. Word has length 26 [2021-10-13 07:25:23,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:23,147 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 247 transitions. [2021-10-13 07:25:23,147 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 07:25:23,148 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 247 transitions. [2021-10-13 07:25:23,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 07:25:23,148 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:23,149 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 07:25:23,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-10-13 07:25:23,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-10-13 07:25:23,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:23,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:23,753 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:25:23,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:23,753 INFO L82 PathProgramCache]: Analyzing trace with hash -675947159, now seen corresponding path program 1 times [2021-10-13 07:25:23,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:23,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942050981] [2021-10-13 07:25:23,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:23,754 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:23,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:23,755 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:23,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-13 07:25:24,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:24,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:25:24,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:24,146 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 07:25:24,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:24,320 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 07:25:24,320 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:24,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942050981] [2021-10-13 07:25:24,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942050981] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:24,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [453490847] [2021-10-13 07:25:24,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:24,321 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:25:24,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:25:24,325 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:25:24,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-10-13 07:25:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:24,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:25:24,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:24,841 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 07:25:24,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:24,922 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 07:25:24,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [453490847] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:24,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906534240] [2021-10-13 07:25:24,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:24,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:25:24,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:25:24,924 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:25:24,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-13 07:25:25,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:25,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 07:25:25,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:25,734 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 07:25:25,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:25,948 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 07:25:25,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906534240] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 07:25:25,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-13 07:25:25,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8, 8, 8, 14] total 26 [2021-10-13 07:25:25,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558398100] [2021-10-13 07:25:25,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 07:25:25,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:25,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 07:25:25,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2021-10-13 07:25:25,951 INFO L87 Difference]: Start difference. First operand 192 states and 247 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 07:25:26,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:26,636 INFO L93 Difference]: Finished difference Result 298 states and 386 transitions. [2021-10-13 07:25:26,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 07:25:26,637 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 07:25:26,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:26,639 INFO L225 Difference]: With dead ends: 298 [2021-10-13 07:25:26,639 INFO L226 Difference]: Without dead ends: 296 [2021-10-13 07:25:26,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 856.3ms TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 07:25:26,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-10-13 07:25:26,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 204. [2021-10-13 07:25:26,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 196 states have (on average 1.3214285714285714) internal successors, (259), 203 states have internal predecessors, (259), 0 states have call successors, (0), 0 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 07:25:26,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 259 transitions. [2021-10-13 07:25:26,660 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 259 transitions. Word has length 26 [2021-10-13 07:25:26,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:26,661 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 259 transitions. [2021-10-13 07:25:26,662 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 07:25:26,662 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 259 transitions. [2021-10-13 07:25:26,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 07:25:26,662 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:26,663 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 07:25:26,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:26,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-10-13 07:25:27,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:27,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:27,281 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:25:27,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:27,282 INFO L82 PathProgramCache]: Analyzing trace with hash 937317075, now seen corresponding path program 1 times [2021-10-13 07:25:27,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:27,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [192797773] [2021-10-13 07:25:27,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:27,282 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:27,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:27,284 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:27,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-13 07:25:27,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:27,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:25:27,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:27,741 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 07:25:27,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:27,937 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 07:25:27,937 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:27,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [192797773] [2021-10-13 07:25:27,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [192797773] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:27,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [864341633] [2021-10-13 07:25:27,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:27,938 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:25:27,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:25:27,939 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:25:27,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-10-13 07:25:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:28,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:25:28,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:28,541 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 07:25:28,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:28,627 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 07:25:28,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [864341633] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:28,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213299089] [2021-10-13 07:25:28,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:28,627 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:25:28,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:25:28,628 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:25:28,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-13 07:25:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:29,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 07:25:29,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:29,469 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 07:25:29,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:29,704 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 07:25:29,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213299089] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 07:25:29,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-13 07:25:29,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8, 8, 8, 14] total 26 [2021-10-13 07:25:29,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256700683] [2021-10-13 07:25:29,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 07:25:29,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:29,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 07:25:29,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2021-10-13 07:25:29,706 INFO L87 Difference]: Start difference. First operand 204 states and 259 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 07:25:30,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:30,463 INFO L93 Difference]: Finished difference Result 355 states and 464 transitions. [2021-10-13 07:25:30,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 07:25:30,466 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 07:25:30,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:30,468 INFO L225 Difference]: With dead ends: 355 [2021-10-13 07:25:30,468 INFO L226 Difference]: Without dead ends: 353 [2021-10-13 07:25:30,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 922.3ms TimeCoverageRelationStatistics Valid=315, Invalid=945, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 07:25:30,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-10-13 07:25:30,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 228. [2021-10-13 07:25:30,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 220 states have (on average 1.3454545454545455) internal successors, (296), 227 states have internal predecessors, (296), 0 states have call successors, (0), 0 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 07:25:30,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 296 transitions. [2021-10-13 07:25:30,489 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 296 transitions. Word has length 27 [2021-10-13 07:25:30,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:30,490 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 296 transitions. [2021-10-13 07:25:30,490 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 07:25:30,490 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 296 transitions. [2021-10-13 07:25:30,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 07:25:30,491 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:30,491 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 07:25:30,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:30,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-10-13 07:25:30,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-10-13 07:25:31,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:25:31,094 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:25:31,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:31,095 INFO L82 PathProgramCache]: Analyzing trace with hash 939040979, now seen corresponding path program 1 times [2021-10-13 07:25:31,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:31,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1810821215] [2021-10-13 07:25:31,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:31,095 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:31,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:31,097 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:31,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-13 07:25:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:31,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:25:31,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:31,580 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 07:25:31,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:31,741 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 07:25:31,741 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:31,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1810821215] [2021-10-13 07:25:31,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1810821215] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:31,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2047525222] [2021-10-13 07:25:31,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:31,742 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:25:31,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:25:31,749 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:25:31,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-10-13 07:25:32,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:32,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:25:32,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:32,391 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 07:25:32,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:32,470 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 07:25:32,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2047525222] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:32,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664572198] [2021-10-13 07:25:32,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:32,471 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:25:32,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:25:32,472 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:25:32,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-13 07:25:32,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:32,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 07:25:32,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:33,372 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 07:25:33,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:33,533 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 07:25:33,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664572198] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 07:25:33,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-13 07:25:33,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8, 8, 8, 14] total 26 [2021-10-13 07:25:33,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277033581] [2021-10-13 07:25:33,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 07:25:33,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:33,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 07:25:33,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2021-10-13 07:25:33,536 INFO L87 Difference]: Start difference. First operand 228 states and 296 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 07:25:33,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:33,911 INFO L93 Difference]: Finished difference Result 283 states and 364 transitions. [2021-10-13 07:25:33,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 07:25:33,912 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 07:25:33,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:33,914 INFO L225 Difference]: With dead ends: 283 [2021-10-13 07:25:33,915 INFO L226 Difference]: Without dead ends: 280 [2021-10-13 07:25:33,915 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 561.9ms TimeCoverageRelationStatistics Valid=271, Invalid=659, Unknown=0, NotChecked=0, Total=930 [2021-10-13 07:25:33,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-10-13 07:25:33,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 234. [2021-10-13 07:25:33,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 226 states have (on average 1.336283185840708) internal successors, (302), 233 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 07:25:33,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 302 transitions. [2021-10-13 07:25:33,936 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 302 transitions. Word has length 27 [2021-10-13 07:25:33,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:33,936 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 302 transitions. [2021-10-13 07:25:33,936 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 07:25:33,936 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 302 transitions. [2021-10-13 07:25:33,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 07:25:33,937 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:33,937 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:33,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-10-13 07:25:34,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-10-13 07:25:34,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2021-10-13 07:25:34,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:25:34,554 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:25:34,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:34,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1840939274, now seen corresponding path program 1 times [2021-10-13 07:25:34,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:34,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578686596] [2021-10-13 07:25:34,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:34,555 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:34,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:34,555 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:34,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-13 07:25:34,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:34,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:25:34,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:25:35,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:35,245 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:25:35,246 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:35,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578686596] [2021-10-13 07:25:35,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578686596] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:35,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [334706788] [2021-10-13 07:25:35,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:35,246 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:25:35,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:25:35,247 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:25:35,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-10-13 07:25:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:35,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:25:35,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:25:35,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:36,024 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:25:36,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [334706788] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:36,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826808238] [2021-10-13 07:25:36,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:36,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:25:36,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:25:36,026 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:25:36,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-13 07:25:36,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:36,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 07:25:36,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:36,978 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:25:36,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:37,144 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 07:25:37,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826808238] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:37,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:25:37,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 15, 8] total 26 [2021-10-13 07:25:37,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179904049] [2021-10-13 07:25:37,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 07:25:37,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:37,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 07:25:37,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2021-10-13 07:25:37,146 INFO L87 Difference]: Start difference. First operand 234 states and 302 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 07:25:38,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:38,884 INFO L93 Difference]: Finished difference Result 451 states and 519 transitions. [2021-10-13 07:25:38,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-13 07:25:38,884 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 07:25:38,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:38,887 INFO L225 Difference]: With dead ends: 451 [2021-10-13 07:25:38,887 INFO L226 Difference]: Without dead ends: 449 [2021-10-13 07:25:38,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 931.2ms TimeCoverageRelationStatistics Valid=619, Invalid=1543, Unknown=0, NotChecked=0, Total=2162 [2021-10-13 07:25:38,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-10-13 07:25:38,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 232. [2021-10-13 07:25:38,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 225 states have (on average 1.3111111111111111) internal successors, (295), 231 states have internal predecessors, (295), 0 states have call successors, (0), 0 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 07:25:38,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 295 transitions. [2021-10-13 07:25:38,911 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 295 transitions. Word has length 27 [2021-10-13 07:25:38,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:38,912 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 295 transitions. [2021-10-13 07:25:38,912 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 07:25:38,912 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 295 transitions. [2021-10-13 07:25:38,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 07:25:38,913 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:38,913 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:38,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:39,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-10-13 07:25:39,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2021-10-13 07:25:39,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:25:39,526 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:25:39,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:39,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1840955162, now seen corresponding path program 1 times [2021-10-13 07:25:39,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:39,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2037557926] [2021-10-13 07:25:39,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:39,527 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:39,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:39,528 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:39,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-10-13 07:25:39,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:39,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:25:39,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:40,103 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 07:25:40,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:40,288 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 07:25:40,288 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:40,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2037557926] [2021-10-13 07:25:40,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2037557926] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:40,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1987146098] [2021-10-13 07:25:40,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:40,289 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:25:40,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:25:40,293 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:25:40,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-10-13 07:25:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:40,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:25:40,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:41,058 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 07:25:41,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:41,141 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 07:25:41,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1987146098] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:41,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242585951] [2021-10-13 07:25:41,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:41,142 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:25:41,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:25:41,144 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:25:41,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-13 07:25:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:41,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 07:25:41,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:42,270 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 07:25:42,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:42,435 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 07:25:42,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242585951] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:42,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:25:42,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 15, 8] total 26 [2021-10-13 07:25:42,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028278909] [2021-10-13 07:25:42,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 07:25:42,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:42,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 07:25:42,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2021-10-13 07:25:42,438 INFO L87 Difference]: Start difference. First operand 232 states and 295 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 07:25:43,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:43,857 INFO L93 Difference]: Finished difference Result 429 states and 495 transitions. [2021-10-13 07:25:43,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 07:25:43,858 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 07:25:43,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:43,860 INFO L225 Difference]: With dead ends: 429 [2021-10-13 07:25:43,860 INFO L226 Difference]: Without dead ends: 427 [2021-10-13 07:25:43,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 885.8ms TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 07:25:43,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-10-13 07:25:43,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 230. [2021-10-13 07:25:43,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 224 states have (on average 1.2857142857142858) internal successors, (288), 229 states have internal predecessors, (288), 0 states have call successors, (0), 0 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 07:25:43,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 288 transitions. [2021-10-13 07:25:43,879 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 288 transitions. Word has length 27 [2021-10-13 07:25:43,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:43,880 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 288 transitions. [2021-10-13 07:25:43,880 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 07:25:43,880 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 288 transitions. [2021-10-13 07:25:43,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 07:25:43,881 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:43,881 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 07:25:43,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:44,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:44,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:44,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:25:44,493 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:25:44,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:44,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1006390506, now seen corresponding path program 1 times [2021-10-13 07:25:44,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:44,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1243594251] [2021-10-13 07:25:44,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:44,495 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:44,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:44,496 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:44,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-10-13 07:25:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:45,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:25:45,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:45,126 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 07:25:45,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:45,312 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 07:25:45,313 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:45,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1243594251] [2021-10-13 07:25:45,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1243594251] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:45,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1099128073] [2021-10-13 07:25:45,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:45,313 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:25:45,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:25:45,314 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:25:45,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-10-13 07:25:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:46,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:25:46,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:46,175 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 07:25:46,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:46,274 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 07:25:46,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1099128073] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:46,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400547550] [2021-10-13 07:25:46,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:46,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:25:46,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:25:46,276 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:25:46,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-13 07:25:46,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:46,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 07:25:46,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:47,354 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 07:25:47,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:47,574 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 07:25:47,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400547550] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:47,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:25:47,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 14, 7] total 26 [2021-10-13 07:25:47,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930575503] [2021-10-13 07:25:47,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 07:25:47,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:47,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 07:25:47,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2021-10-13 07:25:47,576 INFO L87 Difference]: Start difference. First operand 230 states and 288 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 07:25:49,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:49,040 INFO L93 Difference]: Finished difference Result 369 states and 423 transitions. [2021-10-13 07:25:49,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-13 07:25:49,040 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 07:25:49,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:49,042 INFO L225 Difference]: With dead ends: 369 [2021-10-13 07:25:49,042 INFO L226 Difference]: Without dead ends: 367 [2021-10-13 07:25:49,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 1080.2ms TimeCoverageRelationStatistics Valid=708, Invalid=1842, Unknown=0, NotChecked=0, Total=2550 [2021-10-13 07:25:49,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-10-13 07:25:49,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 223. [2021-10-13 07:25:49,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 217 states have (on average 1.2857142857142858) internal successors, (279), 222 states have internal predecessors, (279), 0 states have call successors, (0), 0 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 07:25:49,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 279 transitions. [2021-10-13 07:25:49,075 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 279 transitions. Word has length 28 [2021-10-13 07:25:49,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:49,075 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 279 transitions. [2021-10-13 07:25:49,076 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 07:25:49,076 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 279 transitions. [2021-10-13 07:25:49,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 07:25:49,076 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:49,077 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 07:25:49,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:49,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2021-10-13 07:25:49,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-10-13 07:25:49,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:25:49,690 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:25:49,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:49,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1819841235, now seen corresponding path program 1 times [2021-10-13 07:25:49,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:49,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2000616718] [2021-10-13 07:25:49,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:49,691 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:49,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:49,692 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:49,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-10-13 07:25:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:50,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:25:50,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:50,354 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 07:25:50,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:50,529 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 07:25:50,529 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:50,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2000616718] [2021-10-13 07:25:50,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2000616718] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:50,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1525168280] [2021-10-13 07:25:50,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:50,530 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:25:50,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:25:50,531 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:25:50,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-10-13 07:25:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:51,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:25:51,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:51,421 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 07:25:51,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:51,514 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 07:25:51,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1525168280] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:51,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602545477] [2021-10-13 07:25:51,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:51,515 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:25:51,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:25:51,515 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:25:51,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-13 07:25:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:52,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 07:25:52,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:52,620 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 07:25:52,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:52,862 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 07:25:52,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602545477] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 07:25:52,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-13 07:25:52,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8, 8, 8, 15] total 26 [2021-10-13 07:25:52,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73593005] [2021-10-13 07:25:52,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:25:52,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:52,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:25:52,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2021-10-13 07:25:52,864 INFO L87 Difference]: Start difference. First operand 223 states and 279 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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 07:25:53,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:53,322 INFO L93 Difference]: Finished difference Result 323 states and 396 transitions. [2021-10-13 07:25:53,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 07:25:53,323 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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 07:25:53,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:53,325 INFO L225 Difference]: With dead ends: 323 [2021-10-13 07:25:53,325 INFO L226 Difference]: Without dead ends: 321 [2021-10-13 07:25:53,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 662.3ms TimeCoverageRelationStatistics Valid=301, Invalid=755, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 07:25:53,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-10-13 07:25:53,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 210. [2021-10-13 07:25:53,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.248780487804878) internal successors, (256), 209 states have internal predecessors, (256), 0 states have call successors, (0), 0 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 07:25:53,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 256 transitions. [2021-10-13 07:25:53,346 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 256 transitions. Word has length 28 [2021-10-13 07:25:53,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:53,347 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 256 transitions. [2021-10-13 07:25:53,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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 07:25:53,347 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 256 transitions. [2021-10-13 07:25:53,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 07:25:53,348 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:53,348 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 07:25:53,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:53,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:53,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-10-13 07:25:53,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:25:53,952 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:25:53,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:53,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1821565139, now seen corresponding path program 1 times [2021-10-13 07:25:53,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:53,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1338030179] [2021-10-13 07:25:53,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:53,953 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:53,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:53,955 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:53,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-10-13 07:25:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:54,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:25:54,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:54,666 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 07:25:54,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:54,807 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 07:25:54,807 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:54,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1338030179] [2021-10-13 07:25:54,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1338030179] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:54,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1030207863] [2021-10-13 07:25:54,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:54,808 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:25:54,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:25:54,808 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:25:54,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2021-10-13 07:25:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:55,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:25:55,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:55,778 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 07:25:55,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:55,856 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 07:25:55,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1030207863] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:55,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717596999] [2021-10-13 07:25:55,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:55,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:25:55,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:25:55,858 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:25:55,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-13 07:25:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:56,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 07:25:56,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:57,016 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 07:25:57,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:57,189 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 07:25:57,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717596999] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 07:25:57,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-13 07:25:57,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8, 8, 8, 15] total 26 [2021-10-13 07:25:57,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988893535] [2021-10-13 07:25:57,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:25:57,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:57,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:25:57,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2021-10-13 07:25:57,191 INFO L87 Difference]: Start difference. First operand 210 states and 256 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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 07:25:57,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:57,536 INFO L93 Difference]: Finished difference Result 265 states and 320 transitions. [2021-10-13 07:25:57,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 07:25:57,537 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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 07:25:57,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:57,538 INFO L225 Difference]: With dead ends: 265 [2021-10-13 07:25:57,538 INFO L226 Difference]: Without dead ends: 262 [2021-10-13 07:25:57,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 538.8ms TimeCoverageRelationStatistics Valid=296, Invalid=696, Unknown=0, NotChecked=0, Total=992 [2021-10-13 07:25:57,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-10-13 07:25:57,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 189. [2021-10-13 07:25:57,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 185 states have (on average 1.2054054054054053) internal successors, (223), 188 states have internal predecessors, (223), 0 states have call successors, (0), 0 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 07:25:57,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 223 transitions. [2021-10-13 07:25:57,549 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 223 transitions. Word has length 28 [2021-10-13 07:25:57,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:57,549 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 223 transitions. [2021-10-13 07:25:57,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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 07:25:57,549 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 223 transitions. [2021-10-13 07:25:57,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 07:25:57,550 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:57,550 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 07:25:57,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:57,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2021-10-13 07:25:57,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:58,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:25:58,151 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:25:58,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:58,151 INFO L82 PathProgramCache]: Analyzing trace with hash -726741123, now seen corresponding path program 1 times [2021-10-13 07:25:58,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:58,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832816716] [2021-10-13 07:25:58,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:58,152 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:58,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:58,152 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:58,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-10-13 07:25:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:58,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:25:58,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:58,980 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 07:25:58,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:59,216 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 07:25:59,216 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:59,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832816716] [2021-10-13 07:25:59,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832816716] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:59,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [116008451] [2021-10-13 07:25:59,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:59,217 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:25:59,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:25:59,227 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:25:59,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2021-10-13 07:26:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:00,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:26:00,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:00,314 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 07:26:00,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:00,438 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 07:26:00,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [116008451] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:00,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575378961] [2021-10-13 07:26:00,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:00,441 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:26:00,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:26:00,442 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:26:00,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-10-13 07:26:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:01,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 07:26:01,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:01,670 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 07:26:01,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:02,297 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 07:26:02,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575378961] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:02,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:26:02,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 12] total 35 [2021-10-13 07:26:02,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040700581] [2021-10-13 07:26:02,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-13 07:26:02,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:26:02,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-13 07:26:02,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 07:26:02,301 INFO L87 Difference]: Start difference. First operand 189 states and 223 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 07:26:04,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:04,781 INFO L93 Difference]: Finished difference Result 345 states and 410 transitions. [2021-10-13 07:26:04,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 07:26:04,782 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 07:26:04,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:04,783 INFO L225 Difference]: With dead ends: 345 [2021-10-13 07:26:04,784 INFO L226 Difference]: Without dead ends: 335 [2021-10-13 07:26:04,785 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 2009.4ms TimeCoverageRelationStatistics Valid=891, Invalid=1971, Unknown=0, NotChecked=0, Total=2862 [2021-10-13 07:26:04,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-10-13 07:26:04,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 259. [2021-10-13 07:26:04,799 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 07:26:04,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 317 transitions. [2021-10-13 07:26:04,800 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 317 transitions. Word has length 34 [2021-10-13 07:26:04,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:04,800 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 317 transitions. [2021-10-13 07:26:04,801 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 07:26:04,801 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 317 transitions. [2021-10-13 07:26:04,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-13 07:26:04,801 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:04,801 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 07:26:04,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:05,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-10-13 07:26:05,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:05,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:26:05,402 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:26:05,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:05,403 INFO L82 PathProgramCache]: Analyzing trace with hash 684900318, now seen corresponding path program 2 times [2021-10-13 07:26:05,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:26:05,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556409797] [2021-10-13 07:26:05,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:26:05,403 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:26:05,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:26:05,404 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:26:05,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-10-13 07:26:06,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 07:26:06,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:26:06,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:26:06,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:06,304 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 07:26:06,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:06,444 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 07:26:06,445 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:06,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556409797] [2021-10-13 07:26:06,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556409797] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:06,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:26:06,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 07:26:06,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637115466] [2021-10-13 07:26:06,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:26:06,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:26:06,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:26:06,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:26:06,446 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 07:26:06,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:06,505 INFO L93 Difference]: Finished difference Result 259 states and 317 transitions. [2021-10-13 07:26:06,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:26:06,506 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 07:26:06,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:06,507 INFO L225 Difference]: With dead ends: 259 [2021-10-13 07:26:06,507 INFO L226 Difference]: Without dead ends: 256 [2021-10-13 07:26:06,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:26:06,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-10-13 07:26:06,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2021-10-13 07:26:06,531 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 07:26:06,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 307 transitions. [2021-10-13 07:26:06,532 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 307 transitions. Word has length 52 [2021-10-13 07:26:06,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:06,533 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 307 transitions. [2021-10-13 07:26:06,533 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 07:26:06,533 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 307 transitions. [2021-10-13 07:26:06,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-13 07:26:06,534 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:06,534 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:06,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (53)] Ended with exit code 0 [2021-10-13 07:26:06,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:26:06,749 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:26:06,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:06,749 INFO L82 PathProgramCache]: Analyzing trace with hash -738905971, now seen corresponding path program 2 times [2021-10-13 07:26:06,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:26:06,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347494673] [2021-10-13 07:26:06,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:26:06,750 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:26:06,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:26:06,750 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:26:06,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-10-13 07:26:07,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 07:26:07,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:26:07,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:26:07,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:07,665 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 07:26:07,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:07,814 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 07:26:07,815 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:07,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347494673] [2021-10-13 07:26:07,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347494673] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:07,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:26:07,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 07:26:07,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229851720] [2021-10-13 07:26:07,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:26:07,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:26:07,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:26:07,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:26:07,816 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 07:26:07,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:07,866 INFO L93 Difference]: Finished difference Result 256 states and 307 transitions. [2021-10-13 07:26:07,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:26:07,867 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 07:26:07,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:07,868 INFO L225 Difference]: With dead ends: 256 [2021-10-13 07:26:07,868 INFO L226 Difference]: Without dead ends: 253 [2021-10-13 07:26:07,868 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:26:07,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-10-13 07:26:07,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2021-10-13 07:26:07,891 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 07:26:07,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 302 transitions. [2021-10-13 07:26:07,892 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 302 transitions. Word has length 56 [2021-10-13 07:26:07,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:07,893 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 302 transitions. [2021-10-13 07:26:07,893 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 07:26:07,893 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 302 transitions. [2021-10-13 07:26:07,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-13 07:26:07,894 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:07,895 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 07:26:07,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:08,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:26:08,109 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:26:08,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:08,109 INFO L82 PathProgramCache]: Analyzing trace with hash 399089654, now seen corresponding path program 1 times [2021-10-13 07:26:08,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:26:08,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530151041] [2021-10-13 07:26:08,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:08,110 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:26:08,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:26:08,112 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:26:08,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-10-13 07:26:08,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:08,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:26:08,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:09,202 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 07:26:09,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:09,658 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 07:26:09,659 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:09,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530151041] [2021-10-13 07:26:09,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530151041] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:09,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [16218138] [2021-10-13 07:26:09,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:09,659 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:26:09,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:26:09,665 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:26:09,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2021-10-13 07:26:10,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:10,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:26:10,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:11,063 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 07:26:11,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:11,246 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 07:26:11,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [16218138] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:11,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614450242] [2021-10-13 07:26:11,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:11,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:26:11,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:26:11,247 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:26:11,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-10-13 07:26:12,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:12,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 07:26:12,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:13,000 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 07:26:13,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:13,264 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 07:26:13,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614450242] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 07:26:13,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-13 07:26:13,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14, 14, 14, 14, 21] total 44 [2021-10-13 07:26:13,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719667630] [2021-10-13 07:26:13,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:26:13,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:26:13,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:26:13,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=1412, Unknown=0, NotChecked=0, Total=1892 [2021-10-13 07:26:13,266 INFO L87 Difference]: Start difference. First operand 253 states and 302 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 07:26:13,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:13,794 INFO L93 Difference]: Finished difference Result 359 states and 424 transitions. [2021-10-13 07:26:13,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 07:26:13,795 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 59 [2021-10-13 07:26:13,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:13,796 INFO L225 Difference]: With dead ends: 359 [2021-10-13 07:26:13,796 INFO L226 Difference]: Without dead ends: 357 [2021-10-13 07:26:13,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1185.1ms TimeCoverageRelationStatistics Valid=661, Invalid=1889, Unknown=0, NotChecked=0, Total=2550 [2021-10-13 07:26:13,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-10-13 07:26:13,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 230. [2021-10-13 07:26:13,811 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 07:26:13,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 269 transitions. [2021-10-13 07:26:13,812 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 269 transitions. Word has length 59 [2021-10-13 07:26:13,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:13,812 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 269 transitions. [2021-10-13 07:26:13,813 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 07:26:13,813 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 269 transitions. [2021-10-13 07:26:13,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-13 07:26:13,814 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:13,814 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 07:26:13,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:14,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2021-10-13 07:26:14,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-10-13 07:26:14,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:26:14,429 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-13 07:26:14,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:14,430 INFO L82 PathProgramCache]: Analyzing trace with hash -2146499331, now seen corresponding path program 2 times [2021-10-13 07:26:14,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:26:14,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [524657069] [2021-10-13 07:26:14,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:26:14,430 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:26:14,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:26:14,431 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:26:14,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-10-13 07:26:15,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 07:26:15,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:26:15,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:26:15,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:15,536 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 07:26:15,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:15,726 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 07:26:15,726 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:15,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [524657069] [2021-10-13 07:26:15,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [524657069] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:15,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:26:15,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 07:26:15,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100222188] [2021-10-13 07:26:15,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:26:15,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:26:15,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:26:15,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:26:15,728 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 07:26:15,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:15,778 INFO L93 Difference]: Finished difference Result 230 states and 269 transitions. [2021-10-13 07:26:15,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:26:15,778 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 07:26:15,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:15,778 INFO L225 Difference]: With dead ends: 230 [2021-10-13 07:26:15,778 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 07:26:15,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:26:15,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 07:26:15,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 07:26:15,780 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 07:26:15,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 07:26:15,780 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 70 [2021-10-13 07:26:15,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:15,781 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 07:26:15,781 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 07:26:15,781 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 07:26:15,781 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 07:26:15,783 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:26:15,783 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:26:15,784 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:26:15,784 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:26:15,784 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:26:15,784 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:26:15,784 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:26:15,785 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:26:15,785 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:26:15,785 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:26:15,785 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:26:15,785 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:26:15,786 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:26:15,786 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:26:15,786 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:26:15,786 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:26:15,787 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:26:15,787 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:26:15,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:15,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:26:15,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 07:26:15,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:26:16,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:26:17,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:26:17,951 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:26:17,952 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:26:18,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:26:21,192 INFO L857 garLoopResultBuilder]: For program point L126(line 126) no Hoare annotation was computed. [2021-10-13 07:26:21,192 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION(line 224) no Hoare annotation was computed. [2021-10-13 07:26:21,192 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 72) no Hoare annotation was computed. [2021-10-13 07:26:21,193 INFO L857 garLoopResultBuilder]: For program point L52(line 52) no Hoare annotation was computed. [2021-10-13 07:26:21,193 INFO L857 garLoopResultBuilder]: For program point L176(line 176) no Hoare annotation was computed. [2021-10-13 07:26:21,193 INFO L857 garLoopResultBuilder]: For program point L366(line 366) no Hoare annotation was computed. [2021-10-13 07:26:21,193 INFO L857 garLoopResultBuilder]: For program point L333(line 333) no Hoare annotation was computed. [2021-10-13 07:26:21,193 INFO L857 garLoopResultBuilder]: For program point L234(lines 234 242) no Hoare annotation was computed. [2021-10-13 07:26:21,193 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION(line 297) no Hoare annotation was computed. [2021-10-13 07:26:21,194 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION(line 126) no Hoare annotation was computed. [2021-10-13 07:26:21,194 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 07:26:21,194 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-13 07:26:21,194 INFO L857 garLoopResultBuilder]: For program point L152(lines 152 160) no Hoare annotation was computed. [2021-10-13 07:26:21,194 INFO L857 garLoopResultBuilder]: For program point L309(line 309) no Hoare annotation was computed. [2021-10-13 07:26:21,194 INFO L857 garLoopResultBuilder]: For program point L20(lines 20 401) no Hoare annotation was computed. [2021-10-13 07:26:21,195 INFO L857 garLoopResultBuilder]: For program point L276(lines 276 391) no Hoare annotation was computed. [2021-10-13 07:26:21,195 INFO L860 garLoopResultBuilder]: At program point L400(lines 15 402) the Hoare annotation is: true [2021-10-13 07:26:21,195 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION(line 345) no Hoare annotation was computed. [2021-10-13 07:26:21,195 INFO L857 garLoopResultBuilder]: For program point L70(lines 70 94) no Hoare annotation was computed. [2021-10-13 07:26:21,195 INFO L853 garLoopResultBuilder]: At program point L384(lines 282 391) 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) (bvsle (_ bv0 32) ULTIMATE.start_main_~main__t~0) (= ULTIMATE.start_main_~__VERIFIER_assert__cond~19 (_ bv1 32)) .cse0 (= ULTIMATE.start_main_~__VERIFIER_assert__cond~18 (_ bv1 32)) .cse1 (bvsle ULTIMATE.start_main_~main__t~0 ULTIMATE.start_main_~main__tagbuf_len~0)))) [2021-10-13 07:26:21,196 INFO L853 garLoopResultBuilder]: At program point L351(lines 32 395) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~main__t~0 (_ bv0 32))) (.cse8 (bvadd ULTIMATE.start_main_~main__t~0 (_ bv1 32)))) (let ((.cse2 (bvsle .cse8 ULTIMATE.start_main_~main__tagbuf_len~0)) (.cse3 (= ULTIMATE.start_main_~__VERIFIER_assert__cond~17 (_ bv1 32))) (.cse4 (bvsle (_ bv0 32) ULTIMATE.start_main_~main__t~0)) (.cse5 (= ULTIMATE.start_main_~__VERIFIER_assert__cond~16 (_ bv1 32))) (.cse6 (bvsle (_ bv0 32) .cse8)) (.cse7 (or .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 (not (= ULTIMATE.start_main_~main__tagbuf_len~0 ULTIMATE.start_main_~main__t~0)) .cse0 (= ULTIMATE.start_main_~__VERIFIER_assert__cond~0 (_ bv1 32)) .cse1) (and .cse2 .cse3 .cse4 .cse5 (= ULTIMATE.start_main_~main__t~0 (_ bv1 32)) .cse6 .cse7 .cse1) (and .cse2 .cse3 .cse4 .cse5 (= ULTIMATE.start_main_~__VERIFIER_assert__cond~19 (_ bv1 32)) .cse6 (= ULTIMATE.start_main_~__VERIFIER_assert__cond~18 (_ bv1 32)) .cse7 .cse1)))) [2021-10-13 07:26:21,196 INFO L857 garLoopResultBuilder]: For program point L186(lines 186 196) no Hoare annotation was computed. [2021-10-13 07:26:21,196 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION(line 278) no Hoare annotation was computed. [2021-10-13 07:26:21,196 INFO L857 garLoopResultBuilder]: For program point L376(lines 376 385) no Hoare annotation was computed. [2021-10-13 07:26:21,196 INFO L857 garLoopResultBuilder]: For program point L343(lines 343 352) no Hoare annotation was computed. [2021-10-13 07:26:21,196 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 114) no Hoare annotation was computed. [2021-10-13 07:26:21,196 INFO L857 garLoopResultBuilder]: For program point L112(lines 112 203) no Hoare annotation was computed. [2021-10-13 07:26:21,196 INFO L857 garLoopResultBuilder]: For program point L236(line 236) no Hoare annotation was computed. [2021-10-13 07:26:21,196 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION(line 333) no Hoare annotation was computed. [2021-10-13 07:26:21,196 INFO L853 garLoopResultBuilder]: At program point L195(lines 56 253) the Hoare annotation is: (let ((.cse3 (bvadd ULTIMATE.start_main_~main__tagbuf_len~0 (_ bv1 32)))) (let ((.cse0 (bvsle (_ bv0 32) ULTIMATE.start_main_~main__t~0)) (.cse1 (bvsge .cse3 (_ bv1 32))) (.cse2 (bvsle ULTIMATE.start_main_~main__t~0 ULTIMATE.start_main_~main__tagbuf_len~0))) (or (and .cse0 .cse1 (= (_ bv3 32) ULTIMATE.start_main_~main__t~0) .cse2) (and (= ULTIMATE.start_main_~main__t~0 (_ bv1 32)) (not (= .cse3 ULTIMATE.start_main_~main__t~0)) .cse1) (and .cse0 (= ULTIMATE.start_main_~__VERIFIER_assert__cond~16 (_ bv1 32)) (= ULTIMATE.start_main_~__VERIFIER_assert__cond~18 (_ bv1 32)) .cse1 .cse2) (and (= (_ bv2 32) ULTIMATE.start_main_~main__t~0) .cse1 .cse2) (and .cse0 (not (= ULTIMATE.start_main_~__VERIFIER_assert__cond~8 (_ bv0 32))) .cse1 .cse2)))) [2021-10-13 07:26:21,197 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION(line 154) no Hoare annotation was computed. [2021-10-13 07:26:21,197 INFO L857 garLoopResultBuilder]: For program point L154(line 154) no Hoare annotation was computed. [2021-10-13 07:26:21,197 INFO L857 garLoopResultBuilder]: For program point L278(line 278) no Hoare annotation was computed. [2021-10-13 07:26:21,197 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION(line 378) no Hoare annotation was computed. [2021-10-13 07:26:21,197 INFO L857 garLoopResultBuilder]: For program point L105(lines 105 209) no Hoare annotation was computed. [2021-10-13 07:26:21,197 INFO L857 garLoopResultBuilder]: For program point L72(line 72) no Hoare annotation was computed. [2021-10-13 07:26:21,197 INFO L857 garLoopResultBuilder]: For program point L39(lines 39 255) no Hoare annotation was computed. [2021-10-13 07:26:21,197 INFO L857 garLoopResultBuilder]: For program point L295(lines 295 317) no Hoare annotation was computed. [2021-10-13 07:26:21,197 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION(line 142) no Hoare annotation was computed. [2021-10-13 07:26:21,197 INFO L857 garLoopResultBuilder]: For program point L188(line 188) no Hoare annotation was computed. [2021-10-13 07:26:21,197 INFO L857 garLoopResultBuilder]: For program point L378(line 378) no Hoare annotation was computed. [2021-10-13 07:26:21,197 INFO L857 garLoopResultBuilder]: For program point L345(line 345) no Hoare annotation was computed. [2021-10-13 07:26:21,198 INFO L857 garLoopResultBuilder]: For program point L114(line 114) no Hoare annotation was computed. [2021-10-13 07:26:21,198 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION(line 366) no Hoare annotation was computed. [2021-10-13 07:26:21,198 INFO L857 garLoopResultBuilder]: For program point L32(lines 32 395) no Hoare annotation was computed. [2021-10-13 07:26:21,198 INFO L857 garLoopResultBuilder]: For program point L288(lines 288 390) no Hoare annotation was computed. [2021-10-13 07:26:21,198 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-13 07:26:21,198 INFO L857 garLoopResultBuilder]: For program point L222(lines 222 244) no Hoare annotation was computed. [2021-10-13 07:26:21,198 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION(line 188) no Hoare annotation was computed. [2021-10-13 07:26:21,198 INFO L857 garLoopResultBuilder]: For program point L24(lines 24 396) no Hoare annotation was computed. [2021-10-13 07:26:21,198 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 52) no Hoare annotation was computed. [2021-10-13 07:26:21,198 INFO L857 garLoopResultBuilder]: For program point L82(lines 82 92) no Hoare annotation was computed. [2021-10-13 07:26:21,198 INFO L857 garLoopResultBuilder]: For program point L140(lines 140 162) no Hoare annotation was computed. [2021-10-13 07:26:21,198 INFO L857 garLoopResultBuilder]: For program point L297(line 297) no Hoare annotation was computed. [2021-10-13 07:26:21,198 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 07:26:21,199 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION(line 176) no Hoare annotation was computed. [2021-10-13 07:26:21,199 INFO L857 garLoopResultBuilder]: For program point L124(lines 124 201) no Hoare annotation was computed. [2021-10-13 07:26:21,199 INFO L860 garLoopResultBuilder]: At program point L314(lines 32 395) the Hoare annotation is: true [2021-10-13 07:26:21,199 INFO L857 garLoopResultBuilder]: For program point L215(lines 215 250) no Hoare annotation was computed. [2021-10-13 07:26:21,199 INFO L857 garLoopResultBuilder]: For program point L50(lines 50 253) no Hoare annotation was computed. [2021-10-13 07:26:21,199 INFO L857 garLoopResultBuilder]: For program point L174(lines 174 198) no Hoare annotation was computed. [2021-10-13 07:26:21,199 INFO L857 garLoopResultBuilder]: For program point L364(lines 364 387) no Hoare annotation was computed. [2021-10-13 07:26:21,199 INFO L857 garLoopResultBuilder]: For program point L331(lines 331 354) no Hoare annotation was computed. [2021-10-13 07:26:21,199 INFO L857 garLoopResultBuilder]: For program point L265(lines 265 393) no Hoare annotation was computed. [2021-10-13 07:26:21,199 INFO L857 garLoopResultBuilder]: For program point L133(lines 133 200) no Hoare annotation was computed. [2021-10-13 07:26:21,199 INFO L857 garLoopResultBuilder]: For program point L224(line 224) no Hoare annotation was computed. [2021-10-13 07:26:21,199 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION(line 236) no Hoare annotation was computed. [2021-10-13 07:26:21,199 INFO L853 garLoopResultBuilder]: At program point L249(lines 101 251) the Hoare annotation is: (and (bvsle (bvadd ULTIMATE.start_main_~main__t~0 (_ bv1 32)) ULTIMATE.start_main_~main__tagbuf_len~0) (bvsle (_ bv0 32) ULTIMATE.start_main_~main__t~0) (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 07:26:21,200 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 84) no Hoare annotation was computed. [2021-10-13 07:26:21,200 INFO L857 garLoopResultBuilder]: For program point L84(line 84) no Hoare annotation was computed. [2021-10-13 07:26:21,200 INFO L857 garLoopResultBuilder]: For program point L307(lines 307 315) no Hoare annotation was computed. [2021-10-13 07:26:21,200 INFO L857 garLoopResultBuilder]: For program point L142(line 142) no Hoare annotation was computed. [2021-10-13 07:26:21,200 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION(line 309) no Hoare annotation was computed. [2021-10-13 07:26:21,200 INFO L857 garLoopResultBuilder]: For program point L101(lines 101 251) no Hoare annotation was computed. [2021-10-13 07:26:21,200 INFO L857 garLoopResultBuilder]: For program point L324(lines 324 389) no Hoare annotation was computed. [2021-10-13 07:26:21,204 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:26:21,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:26:21 BoogieIcfgContainer [2021-10-13 07:26:21,221 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:26:21,222 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:26:21,222 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:26:21,222 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:26:21,223 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:24:57" (3/4) ... [2021-10-13 07:26:21,226 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 07:26:21,239 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-13 07:26:21,240 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 07:26:21,241 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:26:21,241 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:26:21,307 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:26:21,307 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:26:21,308 INFO L168 Benchmark]: Toolchain (without parser) took 85446.02 ms. Allocated memory was 71.3 MB in the beginning and 151.0 MB in the end (delta: 79.7 MB). Free memory was 53.3 MB in the beginning and 86.9 MB in the end (delta: -33.7 MB). Peak memory consumption was 45.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:21,309 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 71.3 MB. Free memory is still 52.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:26:21,309 INFO L168 Benchmark]: CACSL2BoogieTranslator took 396.03 ms. Allocated memory is still 71.3 MB. Free memory was 53.1 MB in the beginning and 53.5 MB in the end (delta: -395.8 kB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:21,310 INFO L168 Benchmark]: Boogie Procedure Inliner took 86.04 ms. Allocated memory is still 71.3 MB. Free memory was 53.5 MB in the beginning and 51.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:21,310 INFO L168 Benchmark]: Boogie Preprocessor took 73.12 ms. Allocated memory is still 71.3 MB. Free memory was 51.4 MB in the beginning and 49.8 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:26:21,310 INFO L168 Benchmark]: RCFGBuilder took 598.77 ms. Allocated memory is still 71.3 MB. Free memory was 49.8 MB in the beginning and 35.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:21,311 INFO L168 Benchmark]: TraceAbstraction took 84199.62 ms. Allocated memory was 71.3 MB in the beginning and 151.0 MB in the end (delta: 79.7 MB). Free memory was 34.6 MB in the beginning and 92.2 MB in the end (delta: -57.5 MB). Peak memory consumption was 93.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:21,311 INFO L168 Benchmark]: Witness Printer took 85.15 ms. Allocated memory is still 151.0 MB. Free memory was 92.2 MB in the beginning and 86.9 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:21,313 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 71.3 MB. Free memory is still 52.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 396.03 ms. Allocated memory is still 71.3 MB. Free memory was 53.1 MB in the beginning and 53.5 MB in the end (delta: -395.8 kB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 86.04 ms. Allocated memory is still 71.3 MB. Free memory was 53.5 MB in the beginning and 51.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 73.12 ms. Allocated memory is still 71.3 MB. Free memory was 51.4 MB in the beginning and 49.8 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 598.77 ms. Allocated memory is still 71.3 MB. Free memory was 49.8 MB in the beginning and 35.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 84199.62 ms. Allocated memory was 71.3 MB in the beginning and 151.0 MB in the end (delta: 79.7 MB). Free memory was 34.6 MB in the beginning and 92.2 MB in the end (delta: -57.5 MB). Peak memory consumption was 93.5 MB. Max. memory is 16.1 GB. * Witness Printer took 85.15 ms. Allocated memory is still 151.0 MB. Free memory was 92.2 MB in the beginning and 86.9 MB in the end (delta: 5.2 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: 52]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 72]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 84]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 114]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 126]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 142]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 154]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 176]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 188]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 224]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 236]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 278]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 297]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 309]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 333]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 345]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 366]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 378]: 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, 75 locations, 18 error locations. Started 1 CEGAR loops. OverallTime: 84099.8ms, OverallIterations: 33, TraceHistogramMax: 10, EmptinessCheckTime: 48.5ms, AutomataDifference: 20456.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 5197.7ms, InitialAbstractionConstructionTime: 16.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1455 SDtfs, 11772 SDslu, 7223 SDs, 0 SdLazy, 9802 SolverSat, 1796 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9453.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3146 GetRequests, 2470 SyntacticMatches, 0 SemanticMatches, 676 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6424 ImplicationChecksByTransitivity, 14618.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=259occurred in iteration=29, InterpolantAutomatonStates: 451, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 474.4ms AutomataMinimizationTime, 33 MinimizatonAttempts, 2812 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 60 NumberOfFragments, 232 HoareAnnotationTreeSize, 6 FomulaSimplifications, 6342831293 FormulaSimplificationTreeSizeReduction, 2024.9ms HoareSimplificationTime, 6 FomulaSimplificationsInter, 1426392 FormulaSimplificationTreeSizeReductionInter, 3165.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 587.2ms SsaConstructionTime, 1857.5ms SatisfiabilityAnalysisTime, 20638.6ms InterpolantComputationTime, 1492 NumberOfCodeBlocks, 1357 NumberOfCodeBlocksAsserted, 57 NumberOfCheckSat, 2870 ConstructedInterpolants, 9 QuantifiedInterpolants, 12315 SizeOfPredicates, 231 NumberOfNonLiveVariables, 4487 ConjunctsInSsa, 583 ConjunctsInUnsatCore, 114 InterpolantComputations, 48 PerfectInterpolantSequences, 1105/2648 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 18 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: ((((!(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) && main__t == 1bv32) && ~bvsle32(0bv32, ~bvadd64(main__t, 1bv32))) && (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) && ~bvsle32(0bv32, ~bvadd64(main__t, 1bv32))) && __VERIFIER_assert__cond == 1bv32) && (main__t == 0bv32 || __VERIFIER_assert__cond == 1bv32)) && ~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 1bv32)) - InvariantResult [Line: 101]: Loop Invariant Derived loop invariant: ((~bvsle32(~bvadd64(main__t, 1bv32), main__tagbuf_len) && ~bvsle32(0bv32, main__t)) && ~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 1bv32)) && ~bvsle32(main__t, main__tagbuf_len) - InvariantResult [Line: 56]: Loop Invariant Derived loop invariant: ((((((~bvsle32(0bv32, main__t) && ~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 1bv32)) && 3bv32 == main__t) && ~bvsle32(main__t, main__tagbuf_len)) || ((main__t == 1bv32 && !(~bvadd64(main__tagbuf_len, 1bv32) == main__t)) && ~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 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))) || ((2bv32 == main__t && ~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 1bv32)) && ~bvsle32(main__t, main__tagbuf_len))) || (((~bvsle32(0bv32, main__t) && !(__VERIFIER_assert__cond == 0bv32)) && ~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 1bv32)) && ~bvsle32(main__t, main__tagbuf_len)) - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 282]: 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) && ~bvsle32(0bv32, main__t)) && __VERIFIER_assert__cond == 1bv32) && __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: 1 RESULT: Ultimate proved your program to be correct! [2021-10-13 07:26:21,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a5945c9-4578-44c1-a303-d598aaff8915/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...