./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/lockfree-3.3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/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_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 39b25c4e2cc4769f7c060343bf6a1efac7abb2b9 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/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_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 39b25c4e2cc4769f7c060343bf6a1efac7abb2b9 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:46:57,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:46:57,900 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:46:57,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:46:57,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:46:57,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:46:57,991 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:46:57,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:46:58,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:46:58,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:46:58,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:46:58,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:46:58,015 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:46:58,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:46:58,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:46:58,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:46:58,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:46:58,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:46:58,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:46:58,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:46:58,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:46:58,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:46:58,062 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:46:58,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:46:58,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:46:58,070 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:46:58,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:46:58,073 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:46:58,074 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:46:58,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:46:58,076 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:46:58,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:46:58,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:46:58,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:46:58,084 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:46:58,085 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:46:58,086 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:46:58,086 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:46:58,087 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:46:58,088 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:46:58,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:46:58,093 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-13 07:46:58,155 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:46:58,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:46:58,158 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:46:58,158 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:46:58,159 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:46:58,159 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:46:58,159 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:46:58,160 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:46:58,160 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:46:58,160 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:46:58,162 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:46:58,162 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:46:58,162 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:46:58,163 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:46:58,163 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:46:58,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 07:46:58,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 07:46:58,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:46:58,165 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:46:58,165 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:46:58,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:46:58,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:46:58,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:46:58,167 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 07:46:58,167 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 07:46:58,167 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 07:46:58,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:46:58,170 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:46:58,170 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:46:58,170 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:46:58,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:46:58,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:46:58,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:46:58,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:46:58,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:46:58,173 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:46:58,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:46:58,173 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:46:58,173 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:46:58,174 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_0e1558ba-c794-46d0-a2df-11d45e1b972d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39b25c4e2cc4769f7c060343bf6a1efac7abb2b9 [2021-10-13 07:46:58,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:46:58,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:46:58,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:46:58,584 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:46:58,585 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:46:58,586 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/memsafety/lockfree-3.3.i [2021-10-13 07:46:58,685 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/data/9f484000a/47a995c13e18430f8a48c0b443189480/FLAGcfdff4445 [2021-10-13 07:46:59,474 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:46:59,475 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/sv-benchmarks/c/memsafety/lockfree-3.3.i [2021-10-13 07:46:59,503 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/data/9f484000a/47a995c13e18430f8a48c0b443189480/FLAGcfdff4445 [2021-10-13 07:46:59,714 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/data/9f484000a/47a995c13e18430f8a48c0b443189480 [2021-10-13 07:46:59,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:46:59,719 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:46:59,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:46:59,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:46:59,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:46:59,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:46:59" (1/1) ... [2021-10-13 07:46:59,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fd89c61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:46:59, skipping insertion in model container [2021-10-13 07:46:59,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:46:59" (1/1) ... [2021-10-13 07:46:59,738 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:46:59,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:47:00,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:47:00,224 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:47:00,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:47:00,344 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:47:00,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:00 WrapperNode [2021-10-13 07:47:00,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:47:00,347 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:47:00,347 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:47:00,347 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:47:00,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:00" (1/1) ... [2021-10-13 07:47:00,402 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:00" (1/1) ... [2021-10-13 07:47:00,445 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:47:00,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:47:00,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:47:00,448 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:47:00,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:00" (1/1) ... [2021-10-13 07:47:00,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:00" (1/1) ... [2021-10-13 07:47:00,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:00" (1/1) ... [2021-10-13 07:47:00,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:00" (1/1) ... [2021-10-13 07:47:00,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:00" (1/1) ... [2021-10-13 07:47:00,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:00" (1/1) ... [2021-10-13 07:47:00,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:00" (1/1) ... [2021-10-13 07:47:00,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:47:00,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:47:00,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:47:00,520 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:47:00,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:00" (1/1) ... [2021-10-13 07:47:00,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:47:00,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:47:00,566 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:47:00,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:47:00,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 07:47:00,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 07:47:00,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:47:00,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:47:00,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:47:00,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:47:00,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:47:00,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:47:00,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:47:00,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:47:01,416 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:47:01,417 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-13 07:47:01,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:47:01 BoogieIcfgContainer [2021-10-13 07:47:01,423 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:47:01,425 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:47:01,426 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:47:01,430 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:47:01,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:46:59" (1/3) ... [2021-10-13 07:47:01,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e3df9d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:47:01, skipping insertion in model container [2021-10-13 07:47:01,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:00" (2/3) ... [2021-10-13 07:47:01,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e3df9d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:47:01, skipping insertion in model container [2021-10-13 07:47:01,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:47:01" (3/3) ... [2021-10-13 07:47:01,435 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.3.i [2021-10-13 07:47:01,443 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:47:01,443 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-10-13 07:47:01,517 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:47:01,530 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 07:47:01,531 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-13 07:47:01,554 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 26 states have (on average 2.269230769230769) internal successors, (59), 46 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:01,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:47:01,562 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:47:01,563 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:47:01,564 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 07:47:01,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:47:01,573 INFO L82 PathProgramCache]: Analyzing trace with hash 5879242, now seen corresponding path program 1 times [2021-10-13 07:47:01,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:47:01,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897113085] [2021-10-13 07:47:01,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:01,587 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:47:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:01,764 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 07:47:01,765 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:47:01,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897113085] [2021-10-13 07:47:01,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897113085] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:47:01,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:47:01,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:47:01,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619202198] [2021-10-13 07:47:01,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:47:01,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:47:01,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:47:01,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:47:01,812 INFO L87 Difference]: Start difference. First operand has 47 states, 26 states have (on average 2.269230769230769) internal successors, (59), 46 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:01,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:47:01,831 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2021-10-13 07:47:01,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:47:01,833 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-10-13 07:47:01,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:47:01,846 INFO L225 Difference]: With dead ends: 47 [2021-10-13 07:47:01,846 INFO L226 Difference]: Without dead ends: 46 [2021-10-13 07:47:01,848 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:47:01,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-13 07:47:01,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-10-13 07:47:01,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 45 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:01,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2021-10-13 07:47:01,894 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 4 [2021-10-13 07:47:01,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:47:01,894 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2021-10-13 07:47:01,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:01,895 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2021-10-13 07:47:01,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:47:01,896 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:47:01,896 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:47:01,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:47:01,897 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 07:47:01,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:47:01,899 INFO L82 PathProgramCache]: Analyzing trace with hash 183444173, now seen corresponding path program 1 times [2021-10-13 07:47:01,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:47:01,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708865022] [2021-10-13 07:47:01,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:01,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:47:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:02,012 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 07:47:02,013 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:47:02,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708865022] [2021-10-13 07:47:02,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708865022] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:47:02,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:47:02,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 07:47:02,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630555788] [2021-10-13 07:47:02,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:47:02,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:47:02,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:47:02,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:47:02,021 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:02,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:47:02,166 INFO L93 Difference]: Finished difference Result 84 states and 106 transitions. [2021-10-13 07:47:02,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:47:02,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-10-13 07:47:02,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:47:02,175 INFO L225 Difference]: With dead ends: 84 [2021-10-13 07:47:02,176 INFO L226 Difference]: Without dead ends: 83 [2021-10-13 07:47:02,179 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:47:02,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-13 07:47:02,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2021-10-13 07:47:02,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 63 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:02,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 96 transitions. [2021-10-13 07:47:02,203 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 96 transitions. Word has length 5 [2021-10-13 07:47:02,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:47:02,204 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 96 transitions. [2021-10-13 07:47:02,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:02,204 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 96 transitions. [2021-10-13 07:47:02,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:47:02,205 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:47:02,206 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:47:02,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:47:02,211 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 07:47:02,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:47:02,213 INFO L82 PathProgramCache]: Analyzing trace with hash 183442981, now seen corresponding path program 1 times [2021-10-13 07:47:02,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:47:02,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044862894] [2021-10-13 07:47:02,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:02,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:47:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:02,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:02,328 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:47:02,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044862894] [2021-10-13 07:47:02,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044862894] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:47:02,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:47:02,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:47:02,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387398221] [2021-10-13 07:47:02,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:47:02,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:47:02,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:47:02,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:47:02,333 INFO L87 Difference]: Start difference. First operand 64 states and 96 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:02,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:47:02,366 INFO L93 Difference]: Finished difference Result 116 states and 179 transitions. [2021-10-13 07:47:02,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:47:02,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-10-13 07:47:02,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:47:02,369 INFO L225 Difference]: With dead ends: 116 [2021-10-13 07:47:02,370 INFO L226 Difference]: Without dead ends: 115 [2021-10-13 07:47:02,370 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:47:02,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-13 07:47:02,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 97. [2021-10-13 07:47:02,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 77 states have (on average 2.155844155844156) internal successors, (166), 96 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:02,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 166 transitions. [2021-10-13 07:47:02,384 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 166 transitions. Word has length 5 [2021-10-13 07:47:02,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:47:02,385 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 166 transitions. [2021-10-13 07:47:02,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:02,386 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 166 transitions. [2021-10-13 07:47:02,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:47:02,387 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:47:02,387 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:47:02,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:47:02,387 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 07:47:02,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:47:02,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1391708690, now seen corresponding path program 1 times [2021-10-13 07:47:02,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:47:02,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258526993] [2021-10-13 07:47:02,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:02,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:47:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:02,488 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 07:47:02,489 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:47:02,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258526993] [2021-10-13 07:47:02,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258526993] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:47:02,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:47:02,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:47:02,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606694122] [2021-10-13 07:47:02,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:47:02,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:47:02,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:47:02,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:47:02,493 INFO L87 Difference]: Start difference. First operand 97 states and 166 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:02,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:47:02,581 INFO L93 Difference]: Finished difference Result 146 states and 235 transitions. [2021-10-13 07:47:02,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:47:02,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-10-13 07:47:02,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:47:02,585 INFO L225 Difference]: With dead ends: 146 [2021-10-13 07:47:02,585 INFO L226 Difference]: Without dead ends: 146 [2021-10-13 07:47:02,585 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:47:02,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-13 07:47:02,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 127. [2021-10-13 07:47:02,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 109 states have (on average 2.0458715596330275) internal successors, (223), 126 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 07:47:02,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 223 transitions. [2021-10-13 07:47:02,603 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 223 transitions. Word has length 6 [2021-10-13 07:47:02,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:47:02,603 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 223 transitions. [2021-10-13 07:47:02,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:02,604 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 223 transitions. [2021-10-13 07:47:02,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:47:02,605 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:47:02,605 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:47:02,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 07:47:02,606 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 07:47:02,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:47:02,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1391708691, now seen corresponding path program 1 times [2021-10-13 07:47:02,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:47:02,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243547395] [2021-10-13 07:47:02,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:02,608 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:47:02,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:02,718 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 07:47:02,719 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:47:02,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243547395] [2021-10-13 07:47:02,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243547395] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:47:02,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:47:02,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:47:02,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331280508] [2021-10-13 07:47:02,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:47:02,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:47:02,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:47:02,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:47:02,724 INFO L87 Difference]: Start difference. First operand 127 states and 223 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:02,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:47:02,831 INFO L93 Difference]: Finished difference Result 141 states and 226 transitions. [2021-10-13 07:47:02,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:47:02,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-10-13 07:47:02,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:47:02,836 INFO L225 Difference]: With dead ends: 141 [2021-10-13 07:47:02,836 INFO L226 Difference]: Without dead ends: 141 [2021-10-13 07:47:02,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:47:02,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-10-13 07:47:02,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 125. [2021-10-13 07:47:02,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 109 states have (on average 1.9724770642201834) internal successors, (215), 124 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:02,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 215 transitions. [2021-10-13 07:47:02,875 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 215 transitions. Word has length 6 [2021-10-13 07:47:02,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:47:02,876 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 215 transitions. [2021-10-13 07:47:02,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:02,876 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 215 transitions. [2021-10-13 07:47:02,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:47:02,878 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:47:02,878 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:47:02,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 07:47:02,879 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 07:47:02,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:47:02,880 INFO L82 PathProgramCache]: Analyzing trace with hash 193304434, now seen corresponding path program 1 times [2021-10-13 07:47:02,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:47:02,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828641400] [2021-10-13 07:47:02,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:02,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:47:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:02,951 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 07:47:02,951 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:47:02,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828641400] [2021-10-13 07:47:02,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828641400] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:47:02,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:47:02,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:47:02,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806273938] [2021-10-13 07:47:02,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:47:02,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:47:02,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:47:02,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:47:02,956 INFO L87 Difference]: Start difference. First operand 125 states and 215 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 07:47:02,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:47:02,985 INFO L93 Difference]: Finished difference Result 136 states and 191 transitions. [2021-10-13 07:47:02,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:47:02,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 07:47:02,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:47:02,987 INFO L225 Difference]: With dead ends: 136 [2021-10-13 07:47:02,988 INFO L226 Difference]: Without dead ends: 136 [2021-10-13 07:47:02,988 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:47:02,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-13 07:47:02,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 79. [2021-10-13 07:47:02,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 67 states have (on average 1.8507462686567164) internal successors, (124), 78 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 07:47:02,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 124 transitions. [2021-10-13 07:47:02,996 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 124 transitions. Word has length 7 [2021-10-13 07:47:02,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:47:02,997 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 124 transitions. [2021-10-13 07:47:02,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 07:47:02,997 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 124 transitions. [2021-10-13 07:47:02,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:47:02,998 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:47:02,998 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:47:02,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 07:47:02,999 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 07:47:02,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:47:03,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1747871635, now seen corresponding path program 1 times [2021-10-13 07:47:03,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:47:03,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964841727] [2021-10-13 07:47:03,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:03,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:47:03,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:03,037 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 07:47:03,037 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:47:03,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964841727] [2021-10-13 07:47:03,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964841727] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:47:03,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:47:03,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:47:03,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286667618] [2021-10-13 07:47:03,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:47:03,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:47:03,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:47:03,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:47:03,041 INFO L87 Difference]: Start difference. First operand 79 states and 124 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:03,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:47:03,077 INFO L93 Difference]: Finished difference Result 173 states and 247 transitions. [2021-10-13 07:47:03,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:47:03,078 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 07:47:03,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:47:03,080 INFO L225 Difference]: With dead ends: 173 [2021-10-13 07:47:03,080 INFO L226 Difference]: Without dead ends: 173 [2021-10-13 07:47:03,081 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:47:03,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-10-13 07:47:03,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 113. [2021-10-13 07:47:03,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 101 states have (on average 1.7128712871287128) internal successors, (173), 112 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:03,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 173 transitions. [2021-10-13 07:47:03,090 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 173 transitions. Word has length 8 [2021-10-13 07:47:03,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:47:03,090 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 173 transitions. [2021-10-13 07:47:03,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:03,091 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 173 transitions. [2021-10-13 07:47:03,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:47:03,092 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:47:03,092 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:47:03,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 07:47:03,093 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 07:47:03,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:47:03,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1589040439, now seen corresponding path program 1 times [2021-10-13 07:47:03,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:47:03,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880071689] [2021-10-13 07:47:03,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:03,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:47:03,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:03,148 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 07:47:03,148 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:47:03,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880071689] [2021-10-13 07:47:03,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880071689] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:47:03,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233238682] [2021-10-13 07:47:03,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:03,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:47:03,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:47:03,152 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:47:03,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:47:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:03,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:47:03,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:03,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:03,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:03,540 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 07:47:03,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233238682] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:03,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1153238706] [2021-10-13 07:47:03,566 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-13 07:47:03,566 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:47:03,572 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:47:03,579 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:47:03,580 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:47:03,624 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:47:03,632 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:47:03,633 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:47:03,634 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-13 07:47:03,635 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:47:03,636 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:47:03,637 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-13 07:47:03,642 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 137 [2021-10-13 07:47:03,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:47:03,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-13 07:47:03,695 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:47:03,696 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-13 07:47:03,698 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:47:03,699 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-13 07:47:03,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:47:03,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:47:03,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:47:03,739 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:47:03,743 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 135 [2021-10-13 07:47:03,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:47:03,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:134, output treesize:135 [2021-10-13 07:47:03,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-13 07:47:03,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:47:03,962 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_44| 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 07:47:03,966 INFO L168 Benchmark]: Toolchain (without parser) took 4246.32 ms. Allocated memory was 104.9 MB in the beginning and 140.5 MB in the end (delta: 35.7 MB). Free memory was 70.1 MB in the beginning and 61.5 MB in the end (delta: 8.6 MB). Peak memory consumption was 45.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:47:03,966 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 104.9 MB. Free memory is still 59.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:47:03,967 INFO L168 Benchmark]: CACSL2BoogieTranslator took 624.40 ms. Allocated memory is still 104.9 MB. Free memory was 69.9 MB in the beginning and 70.3 MB in the end (delta: -408.7 kB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:47:03,967 INFO L168 Benchmark]: Boogie Procedure Inliner took 100.33 ms. Allocated memory is still 104.9 MB. Free memory was 70.3 MB in the beginning and 68.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:47:03,968 INFO L168 Benchmark]: Boogie Preprocessor took 70.49 ms. Allocated memory is still 104.9 MB. Free memory was 68.2 MB in the beginning and 66.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:47:03,968 INFO L168 Benchmark]: RCFGBuilder took 904.27 ms. Allocated memory was 104.9 MB in the beginning and 140.5 MB in the end (delta: 35.7 MB). Free memory was 66.5 MB in the beginning and 112.7 MB in the end (delta: -46.3 MB). Peak memory consumption was 28.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:47:03,969 INFO L168 Benchmark]: TraceAbstraction took 2539.24 ms. Allocated memory is still 140.5 MB. Free memory was 112.0 MB in the beginning and 61.5 MB in the end (delta: 50.5 MB). Peak memory consumption was 51.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:47:03,972 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 104.9 MB. Free memory is still 59.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 624.40 ms. Allocated memory is still 104.9 MB. Free memory was 69.9 MB in the beginning and 70.3 MB in the end (delta: -408.7 kB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 100.33 ms. Allocated memory is still 104.9 MB. Free memory was 70.3 MB in the beginning and 68.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 70.49 ms. Allocated memory is still 104.9 MB. Free memory was 68.2 MB in the beginning and 66.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 904.27 ms. Allocated memory was 104.9 MB in the beginning and 140.5 MB in the end (delta: 35.7 MB). Free memory was 66.5 MB in the beginning and 112.7 MB in the end (delta: -46.3 MB). Peak memory consumption was 28.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2539.24 ms. Allocated memory is still 140.5 MB. Free memory was 112.0 MB in the beginning and 61.5 MB in the end (delta: 50.5 MB). Peak memory consumption was 51.0 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_44| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_44|: 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 07:47:04,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:47:06,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:47:06,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:47:06,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:47:06,861 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:47:06,866 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:47:06,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:47:06,879 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:47:06,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:47:06,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:47:06,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:47:06,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:47:06,898 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:47:06,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:47:06,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:47:06,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:47:06,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:47:06,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:47:06,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:47:06,920 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:47:06,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:47:06,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:47:06,929 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:47:06,932 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:47:06,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:47:06,939 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:47:06,939 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:47:06,942 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:47:06,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:47:06,944 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:47:06,945 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:47:06,946 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:47:06,948 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:47:06,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:47:06,951 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:47:06,952 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:47:06,953 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:47:06,953 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:47:06,953 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:47:06,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:47:06,957 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:47:06,958 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-13 07:47:07,011 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:47:07,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:47:07,012 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:47:07,012 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:47:07,013 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:47:07,013 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:47:07,013 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:47:07,013 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:47:07,013 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:47:07,014 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 07:47:07,014 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 07:47:07,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:47:07,015 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:47:07,015 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:47:07,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:47:07,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:47:07,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:47:07,016 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 07:47:07,016 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 07:47:07,016 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 07:47:07,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:47:07,017 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:47:07,017 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:47:07,017 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:47:07,017 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:47:07,017 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:47:07,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:47:07,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:47:07,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:47:07,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:47:07,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:47:07,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:47:07,019 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:47:07,019 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:47:07,020 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:47:07,020 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:47:07,020 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_0e1558ba-c794-46d0-a2df-11d45e1b972d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39b25c4e2cc4769f7c060343bf6a1efac7abb2b9 [2021-10-13 07:47:07,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:47:07,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:47:07,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:47:07,530 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:47:07,530 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:47:07,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/memsafety/lockfree-3.3.i [2021-10-13 07:47:07,608 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/data/2c8dd804b/652fde2e0750469bb83523264862b7cf/FLAGe42a0e556 [2021-10-13 07:47:08,253 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:47:08,254 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/sv-benchmarks/c/memsafety/lockfree-3.3.i [2021-10-13 07:47:08,274 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/data/2c8dd804b/652fde2e0750469bb83523264862b7cf/FLAGe42a0e556 [2021-10-13 07:47:08,517 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/data/2c8dd804b/652fde2e0750469bb83523264862b7cf [2021-10-13 07:47:08,519 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:47:08,521 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:47:08,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:47:08,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:47:08,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:47:08,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:47:08" (1/1) ... [2021-10-13 07:47:08,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1324d7a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:08, skipping insertion in model container [2021-10-13 07:47:08,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:47:08" (1/1) ... [2021-10-13 07:47:08,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:47:08,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:47:09,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:47:09,093 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:47:09,183 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:47:09,226 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:47:09,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:09 WrapperNode [2021-10-13 07:47:09,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:47:09,229 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:47:09,229 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:47:09,229 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:47:09,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:09" (1/1) ... [2021-10-13 07:47:09,264 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:09" (1/1) ... [2021-10-13 07:47:09,312 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:47:09,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:47:09,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:47:09,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:47:09,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:09" (1/1) ... [2021-10-13 07:47:09,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:09" (1/1) ... [2021-10-13 07:47:09,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:09" (1/1) ... [2021-10-13 07:47:09,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:09" (1/1) ... [2021-10-13 07:47:09,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:09" (1/1) ... [2021-10-13 07:47:09,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:09" (1/1) ... [2021-10-13 07:47:09,372 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:09" (1/1) ... [2021-10-13 07:47:09,375 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:47:09,376 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:47:09,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:47:09,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:47:09,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:09" (1/1) ... [2021-10-13 07:47:09,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:47:09,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:47:09,414 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:47:09,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:47:09,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 07:47:09,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:47:09,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:47:09,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:47:09,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:47:09,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:47:09,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 07:47:09,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:47:09,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:47:09,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:47:10,318 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:47:10,319 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-13 07:47:10,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:47:10 BoogieIcfgContainer [2021-10-13 07:47:10,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:47:10,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:47:10,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:47:10,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:47:10,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:47:08" (1/3) ... [2021-10-13 07:47:10,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b931972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:47:10, skipping insertion in model container [2021-10-13 07:47:10,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:09" (2/3) ... [2021-10-13 07:47:10,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b931972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:47:10, skipping insertion in model container [2021-10-13 07:47:10,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:47:10" (3/3) ... [2021-10-13 07:47:10,332 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.3.i [2021-10-13 07:47:10,341 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:47:10,341 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-10-13 07:47:10,409 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:47:10,420 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 07:47:10,420 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-13 07:47:10,441 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 39 states have (on average 2.0) internal successors, (78), 59 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:10,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:47:10,460 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:47:10,461 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:47:10,461 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 07:47:10,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:47:10,468 INFO L82 PathProgramCache]: Analyzing trace with hash 28701576, now seen corresponding path program 1 times [2021-10-13 07:47:10,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:47:10,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [922717682] [2021-10-13 07:47:10,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:10,494 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:47:10,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:47:10,497 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:47:10,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:47:10,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:10,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:47:10,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:10,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:10,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:10,790 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:47:10,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [922717682] [2021-10-13 07:47:10,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [922717682] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:47:10,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:47:10,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:47:10,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732815457] [2021-10-13 07:47:10,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:47:10,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:47:10,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:47:10,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:47:10,821 INFO L87 Difference]: Start difference. First operand has 60 states, 39 states have (on average 2.0) internal successors, (78), 59 states have internal predecessors, (78), 0 states have call successors, (0), 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 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:10,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:47:10,906 INFO L93 Difference]: Finished difference Result 103 states and 135 transitions. [2021-10-13 07:47:10,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:47:10,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-10-13 07:47:10,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:47:10,922 INFO L225 Difference]: With dead ends: 103 [2021-10-13 07:47:10,922 INFO L226 Difference]: Without dead ends: 101 [2021-10-13 07:47:10,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:47:10,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-13 07:47:10,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2021-10-13 07:47:10,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 82 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 07:47:10,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 125 transitions. [2021-10-13 07:47:10,973 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 125 transitions. Word has length 5 [2021-10-13 07:47:10,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:47:10,974 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 125 transitions. [2021-10-13 07:47:10,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:10,974 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 125 transitions. [2021-10-13 07:47:10,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:47:10,975 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:47:10,993 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:47:11,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-13 07:47:11,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:47:11,194 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 07:47:11,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:47:11,195 INFO L82 PathProgramCache]: Analyzing trace with hash 889747453, now seen corresponding path program 1 times [2021-10-13 07:47:11,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:47:11,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725059360] [2021-10-13 07:47:11,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:11,197 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:47:11,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:47:11,201 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:47:11,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:47:11,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:11,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:47:11,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:11,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:11,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:11,361 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 07:47:11,362 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:47:11,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725059360] [2021-10-13 07:47:11,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725059360] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:47:11,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:47:11,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:47:11,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918296771] [2021-10-13 07:47:11,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:47:11,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:47:11,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:47:11,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:47:11,371 INFO L87 Difference]: Start difference. First operand 83 states and 125 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:11,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:47:11,569 INFO L93 Difference]: Finished difference Result 155 states and 235 transitions. [2021-10-13 07:47:11,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:47:11,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-10-13 07:47:11,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:47:11,574 INFO L225 Difference]: With dead ends: 155 [2021-10-13 07:47:11,574 INFO L226 Difference]: Without dead ends: 152 [2021-10-13 07:47:11,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:47:11,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-13 07:47:11,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 132. [2021-10-13 07:47:11,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 112 states have (on average 1.9732142857142858) internal successors, (221), 131 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:11,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 221 transitions. [2021-10-13 07:47:11,600 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 221 transitions. Word has length 6 [2021-10-13 07:47:11,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:47:11,600 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 221 transitions. [2021-10-13 07:47:11,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:11,601 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 221 transitions. [2021-10-13 07:47:11,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:47:11,602 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:47:11,602 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:47:11,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:11,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:47:11,816 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 07:47:11,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:47:11,817 INFO L82 PathProgramCache]: Analyzing trace with hash 889692424, now seen corresponding path program 1 times [2021-10-13 07:47:11,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:47:11,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646528612] [2021-10-13 07:47:11,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:11,818 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:47:11,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:47:11,820 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:47:11,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:47:11,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:11,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:47:11,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:12,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:47:12,024 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 07:47:12,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:12,048 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 07:47:12,049 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:47:12,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646528612] [2021-10-13 07:47:12,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646528612] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:47:12,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:47:12,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:47:12,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217087994] [2021-10-13 07:47:12,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:47:12,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:47:12,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:47:12,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:47:12,055 INFO L87 Difference]: Start difference. First operand 132 states and 221 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:12,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:47:12,265 INFO L93 Difference]: Finished difference Result 199 states and 318 transitions. [2021-10-13 07:47:12,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:47:12,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-10-13 07:47:12,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:47:12,269 INFO L225 Difference]: With dead ends: 199 [2021-10-13 07:47:12,269 INFO L226 Difference]: Without dead ends: 199 [2021-10-13 07:47:12,269 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:47:12,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-10-13 07:47:12,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 178. [2021-10-13 07:47:12,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 160 states have (on average 1.9) internal successors, (304), 177 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:12,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 304 transitions. [2021-10-13 07:47:12,307 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 304 transitions. Word has length 6 [2021-10-13 07:47:12,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:47:12,308 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 304 transitions. [2021-10-13 07:47:12,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:12,309 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 304 transitions. [2021-10-13 07:47:12,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:47:12,310 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:47:12,311 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:47:12,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:12,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:47:12,528 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 07:47:12,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:47:12,529 INFO L82 PathProgramCache]: Analyzing trace with hash 889692425, now seen corresponding path program 1 times [2021-10-13 07:47:12,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:47:12,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1375535806] [2021-10-13 07:47:12,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:12,530 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:47:12,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:47:12,532 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:47:12,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:47:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:12,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:47:12,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:12,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:47:12,685 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 07:47:12,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:12,768 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 07:47:12,768 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:47:12,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1375535806] [2021-10-13 07:47:12,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1375535806] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:47:12,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:47:12,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 07:47:12,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218059891] [2021-10-13 07:47:12,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:47:12,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:47:12,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:47:12,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:47:12,772 INFO L87 Difference]: Start difference. First operand 178 states and 304 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:13,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:47:13,133 INFO L93 Difference]: Finished difference Result 262 states and 412 transitions. [2021-10-13 07:47:13,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:47:13,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 07:47:13,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:47:13,137 INFO L225 Difference]: With dead ends: 262 [2021-10-13 07:47:13,138 INFO L226 Difference]: Without dead ends: 262 [2021-10-13 07:47:13,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:47:13,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-10-13 07:47:13,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 224. [2021-10-13 07:47:13,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 208 states have (on average 1.8509615384615385) internal successors, (385), 223 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:13,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 385 transitions. [2021-10-13 07:47:13,184 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 385 transitions. Word has length 6 [2021-10-13 07:47:13,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:47:13,184 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 385 transitions. [2021-10-13 07:47:13,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:13,184 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 385 transitions. [2021-10-13 07:47:13,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:47:13,185 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:47:13,185 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:47:13,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:13,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:47:13,406 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 07:47:13,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:47:13,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1810669365, now seen corresponding path program 1 times [2021-10-13 07:47:13,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:47:13,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127899114] [2021-10-13 07:47:13,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:13,408 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:47:13,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:47:13,409 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:47:13,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:47:13,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:13,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:47:13,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:13,548 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 07:47:13,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:13,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:13,595 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:47:13,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127899114] [2021-10-13 07:47:13,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127899114] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:47:13,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:47:13,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:47:13,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035941934] [2021-10-13 07:47:13,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:47:13,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:47:13,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:47:13,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:47:13,598 INFO L87 Difference]: Start difference. First operand 224 states and 385 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 07:47:13,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:47:13,663 INFO L93 Difference]: Finished difference Result 197 states and 290 transitions. [2021-10-13 07:47:13,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:47:13,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 07:47:13,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:47:13,667 INFO L225 Difference]: With dead ends: 197 [2021-10-13 07:47:13,668 INFO L226 Difference]: Without dead ends: 197 [2021-10-13 07:47:13,668 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:47:13,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-10-13 07:47:13,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 134. [2021-10-13 07:47:13,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 122 states have (on average 1.7950819672131149) internal successors, (219), 133 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:13,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 219 transitions. [2021-10-13 07:47:13,695 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 219 transitions. Word has length 7 [2021-10-13 07:47:13,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:47:13,696 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 219 transitions. [2021-10-13 07:47:13,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 07:47:13,696 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 219 transitions. [2021-10-13 07:47:13,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:47:13,697 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:47:13,697 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:47:13,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:13,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:47:13,916 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 07:47:13,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:47:13,917 INFO L82 PathProgramCache]: Analyzing trace with hash 346576936, now seen corresponding path program 1 times [2021-10-13 07:47:13,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:47:13,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656765730] [2021-10-13 07:47:13,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:13,918 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:47:13,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:47:13,919 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:47:13,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 07:47:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:13,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:47:13,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:14,067 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 07:47:14,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:14,104 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 07:47:14,105 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:47:14,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656765730] [2021-10-13 07:47:14,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656765730] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:47:14,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:47:14,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:47:14,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374178707] [2021-10-13 07:47:14,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:47:14,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:47:14,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:47:14,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:47:14,112 INFO L87 Difference]: Start difference. First operand 134 states and 219 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:14,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:47:14,154 INFO L93 Difference]: Finished difference Result 271 states and 417 transitions. [2021-10-13 07:47:14,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:47:14,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 07:47:14,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:47:14,158 INFO L225 Difference]: With dead ends: 271 [2021-10-13 07:47:14,158 INFO L226 Difference]: Without dead ends: 271 [2021-10-13 07:47:14,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:47:14,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-10-13 07:47:14,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 178. [2021-10-13 07:47:14,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 166 states have (on average 1.7349397590361446) internal successors, (288), 177 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 07:47:14,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 288 transitions. [2021-10-13 07:47:14,173 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 288 transitions. Word has length 8 [2021-10-13 07:47:14,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:47:14,174 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 288 transitions. [2021-10-13 07:47:14,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:14,174 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 288 transitions. [2021-10-13 07:47:14,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:47:14,175 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:47:14,176 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:47:14,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:14,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:47:14,393 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 07:47:14,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:47:14,394 INFO L82 PathProgramCache]: Analyzing trace with hash 212840816, now seen corresponding path program 1 times [2021-10-13 07:47:14,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:47:14,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [328417517] [2021-10-13 07:47:14,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:14,394 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:47:14,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:47:14,395 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:47:14,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 07:47:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:14,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:47:14,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:14,574 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 07:47:14,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:14,644 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 07:47:14,644 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:47:14,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [328417517] [2021-10-13 07:47:14,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [328417517] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:14,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [889652831] [2021-10-13 07:47:14,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:14,646 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:47:14,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:47:14,648 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:47:14,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-10-13 07:47:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:14,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:47:14,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:14,852 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 07:47:14,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:14,902 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 07:47:14,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [889652831] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:14,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770845767] [2021-10-13 07:47:14,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:14,903 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:47:14,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:47:14,906 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:47:14,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 07:47:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:15,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:47:15,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:15,108 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 07:47:15,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:15,188 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 07:47:15,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770845767] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:15,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:47:15,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2021-10-13 07:47:15,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836305306] [2021-10-13 07:47:15,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:47:15,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:47:15,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:47:15,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:47:15,191 INFO L87 Difference]: Start difference. First operand 178 states and 288 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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 07:47:15,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:47:15,505 INFO L93 Difference]: Finished difference Result 809 states and 1240 transitions. [2021-10-13 07:47:15,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 07:47:15,506 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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 11 [2021-10-13 07:47:15,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:47:15,513 INFO L225 Difference]: With dead ends: 809 [2021-10-13 07:47:15,513 INFO L226 Difference]: Without dead ends: 809 [2021-10-13 07:47:15,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 187.6ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-10-13 07:47:15,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2021-10-13 07:47:15,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 388. [2021-10-13 07:47:15,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 376 states have (on average 1.7154255319148937) internal successors, (645), 387 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:15,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 645 transitions. [2021-10-13 07:47:15,535 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 645 transitions. Word has length 11 [2021-10-13 07:47:15,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:47:15,535 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 645 transitions. [2021-10-13 07:47:15,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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 07:47:15,536 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 645 transitions. [2021-10-13 07:47:15,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:47:15,537 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:47:15,537 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:47:15,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:15,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:15,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-10-13 07:47:16,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:47:16,165 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 07:47:16,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:47:16,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1598757208, now seen corresponding path program 1 times [2021-10-13 07:47:16,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:47:16,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239943489] [2021-10-13 07:47:16,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:16,166 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:47:16,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:47:16,167 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:47:16,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 07:47:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:16,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:47:16,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:16,326 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 07:47:16,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:16,378 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 07:47:16,378 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:47:16,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239943489] [2021-10-13 07:47:16,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239943489] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:16,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [864838740] [2021-10-13 07:47:16,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:16,382 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:47:16,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:47:16,383 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:47:16,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-10-13 07:47:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:16,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:47:16,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:16,611 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 07:47:16,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:16,649 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 07:47:16,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [864838740] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:16,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82072319] [2021-10-13 07:47:16,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:16,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:47:16,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:47:16,657 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:47:16,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 07:47:16,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:16,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:47:16,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:16,832 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 07:47:16,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:16,877 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 07:47:16,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82072319] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:16,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:47:16,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 5 [2021-10-13 07:47:16,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152245751] [2021-10-13 07:47:16,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:47:16,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:47:16,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:47:16,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:47:16,880 INFO L87 Difference]: Start difference. First operand 388 states and 645 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 07:47:16,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:47:16,946 INFO L93 Difference]: Finished difference Result 906 states and 1447 transitions. [2021-10-13 07:47:16,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:47:16,946 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 07:47:16,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:47:16,956 INFO L225 Difference]: With dead ends: 906 [2021-10-13 07:47:16,956 INFO L226 Difference]: Without dead ends: 906 [2021-10-13 07:47:16,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:47:16,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-10-13 07:47:16,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 882. [2021-10-13 07:47:16,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 870 states have (on average 1.6632183908045977) internal successors, (1447), 881 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:16,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1447 transitions. [2021-10-13 07:47:16,990 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1447 transitions. Word has length 11 [2021-10-13 07:47:16,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:47:16,990 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 1447 transitions. [2021-10-13 07:47:16,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 07:47:16,991 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1447 transitions. [2021-10-13 07:47:16,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:47:16,994 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:47:16,994 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:47:17,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:17,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-10-13 07:47:17,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:17,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:47:17,601 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 07:47:17,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:47:17,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1435756047, now seen corresponding path program 1 times [2021-10-13 07:47:17,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:47:17,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102635299] [2021-10-13 07:47:17,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:17,602 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:47:17,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:47:17,606 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:47:17,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 07:47:17,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:17,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:47:17,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:17,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:17,915 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:17,915 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:47:17,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102635299] [2021-10-13 07:47:17,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102635299] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:17,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2130982548] [2021-10-13 07:47:17,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:17,917 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:47:17,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:47:17,920 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:47:17,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-10-13 07:47:18,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:18,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:47:18,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:18,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:18,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:18,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2130982548] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:18,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876597999] [2021-10-13 07:47:18,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:18,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:47:18,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:47:18,323 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:47:18,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-13 07:47:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:18,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:47:18,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:18,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:18,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876597999] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:18,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:47:18,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2021-10-13 07:47:18,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761759346] [2021-10-13 07:47:18,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:47:18,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:47:18,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:47:18,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:47:18,707 INFO L87 Difference]: Start difference. First operand 882 states and 1447 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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 07:47:18,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:47:18,831 INFO L93 Difference]: Finished difference Result 1114 states and 1761 transitions. [2021-10-13 07:47:18,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:47:18,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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 07:47:18,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:47:18,841 INFO L225 Difference]: With dead ends: 1114 [2021-10-13 07:47:18,841 INFO L226 Difference]: Without dead ends: 1114 [2021-10-13 07:47:18,842 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:47:18,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-10-13 07:47:18,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 993. [2021-10-13 07:47:18,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 981 states have (on average 1.6136595310907238) internal successors, (1583), 992 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:18,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1583 transitions. [2021-10-13 07:47:18,878 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1583 transitions. Word has length 16 [2021-10-13 07:47:18,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:47:18,878 INFO L470 AbstractCegarLoop]: Abstraction has 993 states and 1583 transitions. [2021-10-13 07:47:18,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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 07:47:18,879 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1583 transitions. [2021-10-13 07:47:18,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 07:47:18,886 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:47:18,887 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:47:18,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:19,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-10-13 07:47:19,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-10-13 07:47:19,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:47:19,504 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 07:47:19,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:47:19,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1786470878, now seen corresponding path program 1 times [2021-10-13 07:47:19,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:47:19,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727828744] [2021-10-13 07:47:19,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:19,505 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:47:19,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:47:19,507 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:47:19,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 07:47:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:19,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:47:19,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:19,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:19,839 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:47:19,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727828744] [2021-10-13 07:47:19,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727828744] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:19,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1527617637] [2021-10-13 07:47:19,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:19,840 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:47:19,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:47:19,845 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:47:19,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-10-13 07:47:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:20,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:47:20,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:20,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:20,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:20,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:20,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1527617637] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:20,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676911775] [2021-10-13 07:47:20,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:20,271 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:47:20,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:47:20,272 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:47:20,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-13 07:47:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:20,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:47:20,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:20,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:20,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:20,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:20,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676911775] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:20,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:47:20,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2021-10-13 07:47:20,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225308778] [2021-10-13 07:47:20,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:47:20,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:47:20,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:47:20,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:47:20,686 INFO L87 Difference]: Start difference. First operand 993 states and 1583 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:21,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:47:21,047 INFO L93 Difference]: Finished difference Result 1571 states and 2402 transitions. [2021-10-13 07:47:21,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 07:47:21,048 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 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 19 [2021-10-13 07:47:21,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:47:21,059 INFO L225 Difference]: With dead ends: 1571 [2021-10-13 07:47:21,060 INFO L226 Difference]: Without dead ends: 1571 [2021-10-13 07:47:21,060 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 225.3ms TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-10-13 07:47:21,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2021-10-13 07:47:21,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 954. [2021-10-13 07:47:21,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 942 states have (on average 1.5976645435244161) internal successors, (1505), 953 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:21,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1505 transitions. [2021-10-13 07:47:21,101 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1505 transitions. Word has length 19 [2021-10-13 07:47:21,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:47:21,101 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 1505 transitions. [2021-10-13 07:47:21,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:21,102 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1505 transitions. [2021-10-13 07:47:21,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 07:47:21,103 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:47:21,103 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:47:21,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:21,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:21,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:21,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:47:21,718 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 07:47:21,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:47:21,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1138871677, now seen corresponding path program 1 times [2021-10-13 07:47:21,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:47:21,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204773367] [2021-10-13 07:47:21,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:21,719 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:47:21,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:47:21,720 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:47:21,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-13 07:47:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:22,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:47:22,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:47:22,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:22,248 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:47:22,249 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:47:22,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204773367] [2021-10-13 07:47:22,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1204773367] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:22,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [429301312] [2021-10-13 07:47:22,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:22,250 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:47:22,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:47:22,251 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:47:22,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-10-13 07:47:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:22,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:47:22,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:22,659 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:47:22,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:22,752 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:47:22,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [429301312] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:22,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967287958] [2021-10-13 07:47:22,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:22,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:47:22,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:47:22,754 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:47:22,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-13 07:47:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:23,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:47:23,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-13 07:47:23,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-13 07:47:23,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967287958] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:47:23,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 07:47:23,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5, 5, 5] total 11 [2021-10-13 07:47:23,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295680209] [2021-10-13 07:47:23,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:47:23,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:47:23,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:47:23,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-13 07:47:23,297 INFO L87 Difference]: Start difference. First operand 954 states and 1505 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 07:47:23,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:47:23,445 INFO L93 Difference]: Finished difference Result 1447 states and 2319 transitions. [2021-10-13 07:47:23,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:47:23,446 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 26 [2021-10-13 07:47:23,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:47:23,457 INFO L225 Difference]: With dead ends: 1447 [2021-10-13 07:47:23,457 INFO L226 Difference]: Without dead ends: 1447 [2021-10-13 07:47:23,458 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 136.1ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:47:23,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2021-10-13 07:47:23,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 1435. [2021-10-13 07:47:23,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1423 states have (on average 1.629655657062544) internal successors, (2319), 1434 states have internal predecessors, (2319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:23,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 2319 transitions. [2021-10-13 07:47:23,506 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 2319 transitions. Word has length 26 [2021-10-13 07:47:23,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:47:23,506 INFO L470 AbstractCegarLoop]: Abstraction has 1435 states and 2319 transitions. [2021-10-13 07:47:23,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 07:47:23,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 2319 transitions. [2021-10-13 07:47:23,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 07:47:23,508 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:47:23,508 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:47:23,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:23,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:23,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:24,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:47:24,121 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 07:47:24,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:47:24,121 INFO L82 PathProgramCache]: Analyzing trace with hash -990026877, now seen corresponding path program 1 times [2021-10-13 07:47:24,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:47:24,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821685831] [2021-10-13 07:47:24,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:24,122 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:47:24,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:47:24,124 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:47:24,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-13 07:47:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:24,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:47:24,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:24,626 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:24,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:25,139 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:25,139 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:47:25,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821685831] [2021-10-13 07:47:25,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821685831] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:25,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1256384459] [2021-10-13 07:47:25,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:25,140 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:47:25,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:47:25,142 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:47:25,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-10-13 07:47:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:25,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 07:47:25,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:25,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:25,847 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:25,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1256384459] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:25,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994088048] [2021-10-13 07:47:25,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:25,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:47:25,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:47:25,849 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:47:25,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-13 07:47:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:26,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:47:26,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-13 07:47:26,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:26,488 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-13 07:47:26,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994088048] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 07:47:26,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-13 07:47:26,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 8, 7, 7, 7] total 24 [2021-10-13 07:47:26,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806321260] [2021-10-13 07:47:26,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 07:47:26,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:47:26,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 07:47:26,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-10-13 07:47:26,490 INFO L87 Difference]: Start difference. First operand 1435 states and 2319 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:26,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:47:26,740 INFO L93 Difference]: Finished difference Result 2527 states and 4074 transitions. [2021-10-13 07:47:26,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 07:47:26,741 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 07:47:26,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:47:26,759 INFO L225 Difference]: With dead ends: 2527 [2021-10-13 07:47:26,759 INFO L226 Difference]: Without dead ends: 2527 [2021-10-13 07:47:26,760 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 467.7ms TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-10-13 07:47:26,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2021-10-13 07:47:26,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 1695. [2021-10-13 07:47:26,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1683 states have (on average 1.625668449197861) internal successors, (2736), 1694 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:26,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 2736 transitions. [2021-10-13 07:47:26,826 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 2736 transitions. Word has length 26 [2021-10-13 07:47:26,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:47:26,827 INFO L470 AbstractCegarLoop]: Abstraction has 1695 states and 2736 transitions. [2021-10-13 07:47:26,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:26,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 2736 transitions. [2021-10-13 07:47:26,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 07:47:26,828 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:47:26,828 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:47:26,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:27,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-10-13 07:47:27,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-10-13 07:47:27,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:47:27,442 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 07:47:27,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:47:27,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1139637279, now seen corresponding path program 2 times [2021-10-13 07:47:27,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:47:27,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [885034290] [2021-10-13 07:47:27,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:47:27,443 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:47:27,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:47:27,444 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:47:27,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-13 07:47:27,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:47:27,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:47:27,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:47:27,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:27,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:28,065 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:47:28,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [885034290] [2021-10-13 07:47:28,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [885034290] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:28,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [368442679] [2021-10-13 07:47:28,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:47:28,066 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:47:28,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:47:28,067 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:47:28,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-10-13 07:47:28,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:47:28,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:47:28,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:47:28,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:28,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:28,753 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:28,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [368442679] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:28,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439052664] [2021-10-13 07:47:28,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:47:28,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:47:28,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:47:28,755 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:47:28,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-13 07:47:29,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:47:29,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:47:29,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:47:29,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:29,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-13 07:47:29,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439052664] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:29,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:47:29,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 9, 7] total 20 [2021-10-13 07:47:29,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290917258] [2021-10-13 07:47:29,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 07:47:29,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:47:29,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 07:47:29,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-10-13 07:47:29,602 INFO L87 Difference]: Start difference. First operand 1695 states and 2736 transitions. Second operand has 20 states, 20 states have (on average 3.75) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:30,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:47:30,906 INFO L93 Difference]: Finished difference Result 4858 states and 7508 transitions. [2021-10-13 07:47:30,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-13 07:47:30,906 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 07:47:30,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:47:30,942 INFO L225 Difference]: With dead ends: 4858 [2021-10-13 07:47:30,942 INFO L226 Difference]: Without dead ends: 4858 [2021-10-13 07:47:30,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 936.9ms TimeCoverageRelationStatistics Valid=660, Invalid=1790, Unknown=0, NotChecked=0, Total=2450 [2021-10-13 07:47:30,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4858 states. [2021-10-13 07:47:31,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4858 to 3320. [2021-10-13 07:47:31,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3320 states, 3308 states have (on average 1.5556227327690448) internal successors, (5146), 3319 states have internal predecessors, (5146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:31,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3320 states to 3320 states and 5146 transitions. [2021-10-13 07:47:31,092 INFO L78 Accepts]: Start accepts. Automaton has 3320 states and 5146 transitions. Word has length 26 [2021-10-13 07:47:31,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:47:31,093 INFO L470 AbstractCegarLoop]: Abstraction has 3320 states and 5146 transitions. [2021-10-13 07:47:31,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:31,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3320 states and 5146 transitions. [2021-10-13 07:47:31,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-13 07:47:31,098 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:47:31,098 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:47:31,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:31,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:31,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:31,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:47:31,713 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 07:47:31,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:47:31,713 INFO L82 PathProgramCache]: Analyzing trace with hash -681445988, now seen corresponding path program 1 times [2021-10-13 07:47:31,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:47:31,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527650211] [2021-10-13 07:47:31,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:31,714 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:47:31,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:47:31,721 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:47:31,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-13 07:47:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:32,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:47:32,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:32,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:32,443 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:32,443 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:47:32,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527650211] [2021-10-13 07:47:32,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527650211] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:32,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1870792597] [2021-10-13 07:47:32,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:32,445 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:47:32,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:47:32,446 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:47:32,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-10-13 07:47:32,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:32,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:47:32,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:33,057 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:33,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:33,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1870792597] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:33,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631178000] [2021-10-13 07:47:33,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:33,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:47:33,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:47:33,220 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:47:33,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-13 07:47:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:33,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:47:33,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:33,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:34,016 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:34,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631178000] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:34,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:47:34,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-10-13 07:47:34,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974167269] [2021-10-13 07:47:34,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 07:47:34,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:47:34,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 07:47:34,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-10-13 07:47:34,019 INFO L87 Difference]: Start difference. First operand 3320 states and 5146 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 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 07:47:34,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:47:34,990 INFO L93 Difference]: Finished difference Result 3936 states and 6039 transitions. [2021-10-13 07:47:34,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-13 07:47:34,990 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-13 07:47:34,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:47:35,017 INFO L225 Difference]: With dead ends: 3936 [2021-10-13 07:47:35,017 INFO L226 Difference]: Without dead ends: 3936 [2021-10-13 07:47:35,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 705.0ms TimeCoverageRelationStatistics Valid=430, Invalid=1826, Unknown=0, NotChecked=0, Total=2256 [2021-10-13 07:47:35,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3936 states. [2021-10-13 07:47:35,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3936 to 2863. [2021-10-13 07:47:35,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2851 states have (on average 1.5489301999298493) internal successors, (4416), 2862 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:35,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 4416 transitions. [2021-10-13 07:47:35,133 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 4416 transitions. Word has length 36 [2021-10-13 07:47:35,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:47:35,134 INFO L470 AbstractCegarLoop]: Abstraction has 2863 states and 4416 transitions. [2021-10-13 07:47:35,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 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 07:47:35,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 4416 transitions. [2021-10-13 07:47:35,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-13 07:47:35,136 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:47:35,136 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:47:35,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:35,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-10-13 07:47:35,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:35,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:47:35,750 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 07:47:35,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:47:35,751 INFO L82 PathProgramCache]: Analyzing trace with hash 812497874, now seen corresponding path program 1 times [2021-10-13 07:47:35,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:47:35,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1965077268] [2021-10-13 07:47:35,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:35,752 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:47:35,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:47:35,753 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:47:35,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-13 07:47:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:36,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:47:36,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-13 07:47:36,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:36,433 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-13 07:47:36,433 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:47:36,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1965077268] [2021-10-13 07:47:36,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1965077268] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:36,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [397255632] [2021-10-13 07:47:36,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:36,434 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:47:36,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:47:36,435 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:47:36,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-10-13 07:47:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:37,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:47:37,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:37,251 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-13 07:47:37,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-13 07:47:37,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [397255632] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:37,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891679188] [2021-10-13 07:47:37,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:37,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:47:37,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:47:37,411 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:47:37,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-13 07:47:37,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:38,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:47:38,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-13 07:47:38,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-13 07:47:38,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891679188] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:38,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:47:38,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 4 [2021-10-13 07:47:38,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934044073] [2021-10-13 07:47:38,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:47:38,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:47:38,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:47:38,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:47:38,317 INFO L87 Difference]: Start difference. First operand 2863 states and 4416 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:38,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:47:38,502 INFO L93 Difference]: Finished difference Result 5421 states and 8408 transitions. [2021-10-13 07:47:38,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:47:38,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-10-13 07:47:38,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:47:38,561 INFO L225 Difference]: With dead ends: 5421 [2021-10-13 07:47:38,561 INFO L226 Difference]: Without dead ends: 5421 [2021-10-13 07:47:38,564 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:47:38,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5421 states. [2021-10-13 07:47:38,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5421 to 4803. [2021-10-13 07:47:38,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 4791 states have (on average 1.5616781465247338) internal successors, (7482), 4802 states have internal predecessors, (7482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:38,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 7482 transitions. [2021-10-13 07:47:38,710 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 7482 transitions. Word has length 44 [2021-10-13 07:47:38,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:47:38,711 INFO L470 AbstractCegarLoop]: Abstraction has 4803 states and 7482 transitions. [2021-10-13 07:47:38,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:38,711 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 7482 transitions. [2021-10-13 07:47:38,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-13 07:47:38,713 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:47:38,713 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:47:38,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:38,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:39,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:39,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:47:39,328 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 07:47:39,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:47:39,329 INFO L82 PathProgramCache]: Analyzing trace with hash -426383378, now seen corresponding path program 1 times [2021-10-13 07:47:39,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:47:39,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818833874] [2021-10-13 07:47:39,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:39,330 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:47:39,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:47:39,330 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:47:39,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-13 07:47:39,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:39,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:47:39,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:39,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:47:39,987 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-13 07:47:39,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-13 07:47:40,170 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:47:40,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818833874] [2021-10-13 07:47:40,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818833874] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:40,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1208862463] [2021-10-13 07:47:40,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:40,171 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:47:40,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:47:40,172 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:47:40,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-10-13 07:47:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:41,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:47:41,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:41,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:47:41,262 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-13 07:47:41,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 42 proven. 12 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-13 07:47:41,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1208862463] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:41,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463493654] [2021-10-13 07:47:41,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:41,419 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:47:41,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:47:41,425 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:47:41,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-13 07:47:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:42,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:47:42,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-13 07:47:42,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-13 07:47:42,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463493654] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:42,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:47:42,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 4 [2021-10-13 07:47:42,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849412824] [2021-10-13 07:47:42,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:47:42,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:47:42,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:47:42,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:47:42,405 INFO L87 Difference]: Start difference. First operand 4803 states and 7482 transitions. Second operand has 5 states, 4 states have (on average 10.75) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:42,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:47:42,951 INFO L93 Difference]: Finished difference Result 9250 states and 14275 transitions. [2021-10-13 07:47:42,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:47:42,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.75) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-10-13 07:47:42,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:47:42,973 INFO L225 Difference]: With dead ends: 9250 [2021-10-13 07:47:42,974 INFO L226 Difference]: Without dead ends: 9250 [2021-10-13 07:47:42,974 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 263 SyntacticMatches, 7 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:47:42,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9250 states. [2021-10-13 07:47:43,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9250 to 8484. [2021-10-13 07:47:43,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8484 states, 8473 states have (on average 1.5583618553050866) internal successors, (13204), 8483 states have internal predecessors, (13204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:43,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8484 states to 8484 states and 13204 transitions. [2021-10-13 07:47:43,255 INFO L78 Accepts]: Start accepts. Automaton has 8484 states and 13204 transitions. Word has length 46 [2021-10-13 07:47:43,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:47:43,255 INFO L470 AbstractCegarLoop]: Abstraction has 8484 states and 13204 transitions. [2021-10-13 07:47:43,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.75) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:43,256 INFO L276 IsEmpty]: Start isEmpty. Operand 8484 states and 13204 transitions. [2021-10-13 07:47:43,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-13 07:47:43,257 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:47:43,258 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:47:43,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:43,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:43,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:43,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:47:43,863 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 07:47:43,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:47:43,863 INFO L82 PathProgramCache]: Analyzing trace with hash -426383377, now seen corresponding path program 1 times [2021-10-13 07:47:43,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:47:43,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119605880] [2021-10-13 07:47:43,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:43,864 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:47:43,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:47:43,869 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:47:43,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-10-13 07:47:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:44,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:47:44,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:44,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:47:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-13 07:47:44,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-13 07:47:45,674 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:47:45,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119605880] [2021-10-13 07:47:45,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119605880] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:45,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1465398708] [2021-10-13 07:47:45,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:45,675 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:47:45,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:47:45,677 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:47:45,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-10-13 07:47:46,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:46,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:47:46,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:46,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:47:46,933 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-13 07:47:46,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:47,503 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-13 07:47:47,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1465398708] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:47,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497443284] [2021-10-13 07:47:47,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:47,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:47:47,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:47:47,505 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:47:47,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-13 07:47:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:48,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:47:48,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:48,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:47:48,580 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-13 07:47:48,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-13 07:47:49,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497443284] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:49,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:47:49,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2021-10-13 07:47:49,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136234487] [2021-10-13 07:47:49,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:47:49,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:47:49,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:47:49,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:47:49,083 INFO L87 Difference]: Start difference. First operand 8484 states and 13204 transitions. Second operand has 8 states, 7 states have (on average 8.285714285714286) internal successors, (58), 8 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 07:47:50,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:47:50,179 INFO L93 Difference]: Finished difference Result 13777 states and 20972 transitions. [2021-10-13 07:47:50,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:47:50,180 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.285714285714286) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-10-13 07:47:50,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:47:50,214 INFO L225 Difference]: With dead ends: 13777 [2021-10-13 07:47:50,215 INFO L226 Difference]: Without dead ends: 13777 [2021-10-13 07:47:50,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 309.9ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:47:50,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13777 states. [2021-10-13 07:47:50,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13777 to 12212. [2021-10-13 07:47:50,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12212 states, 12201 states have (on average 1.5429882796492091) internal successors, (18826), 12211 states have internal predecessors, (18826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12212 states to 12212 states and 18826 transitions. [2021-10-13 07:47:50,553 INFO L78 Accepts]: Start accepts. Automaton has 12212 states and 18826 transitions. Word has length 46 [2021-10-13 07:47:50,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:47:50,554 INFO L470 AbstractCegarLoop]: Abstraction has 12212 states and 18826 transitions. [2021-10-13 07:47:50,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.285714285714286) internal successors, (58), 8 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 07:47:50,555 INFO L276 IsEmpty]: Start isEmpty. Operand 12212 states and 18826 transitions. [2021-10-13 07:47:50,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-13 07:47:50,558 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:47:50,558 INFO L512 BasicCegarLoop]: trace histogram [10, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:47:50,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:50,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2021-10-13 07:47:50,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:51,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:47:51,173 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 07:47:51,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:47:51,173 INFO L82 PathProgramCache]: Analyzing trace with hash 456298912, now seen corresponding path program 1 times [2021-10-13 07:47:51,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:47:51,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518564117] [2021-10-13 07:47:51,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:51,174 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:47:51,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:47:51,175 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:47:51,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-10-13 07:47:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:51,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:47:51,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:52,105 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 41 proven. 30 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-10-13 07:47:52,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 41 proven. 30 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-10-13 07:47:52,309 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:47:52,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518564117] [2021-10-13 07:47:52,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518564117] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:52,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1759624378] [2021-10-13 07:47:52,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:52,310 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:47:52,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:47:52,312 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:47:52,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-10-13 07:47:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:53,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:47:53,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 41 proven. 52 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-10-13 07:47:53,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:53,703 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 41 proven. 30 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-10-13 07:47:53,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1759624378] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:53,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568875221] [2021-10-13 07:47:53,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:53,704 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:47:53,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:47:53,707 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:47:53,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-13 07:47:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:54,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:47:54,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 25 proven. 49 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-10-13 07:47:54,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 25 proven. 49 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-10-13 07:47:55,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568875221] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:55,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:47:55,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 6, 6, 6] total 14 [2021-10-13 07:47:55,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038873293] [2021-10-13 07:47:55,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 07:47:55,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:47:55,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 07:47:55,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-10-13 07:47:55,116 INFO L87 Difference]: Start difference. First operand 12212 states and 18826 transitions. Second operand has 15 states, 15 states have (on average 6.066666666666666) internal successors, (91), 14 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 07:47:55,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:47:55,723 INFO L93 Difference]: Finished difference Result 33133 states and 48848 transitions. [2021-10-13 07:47:55,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 07:47:55,724 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.066666666666666) internal successors, (91), 14 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 56 [2021-10-13 07:47:55,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:47:55,810 INFO L225 Difference]: With dead ends: 33133 [2021-10-13 07:47:55,810 INFO L226 Difference]: Without dead ends: 33133 [2021-10-13 07:47:55,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 341.1ms TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 07:47:55,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33133 states. [2021-10-13 07:47:56,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33133 to 23542. [2021-10-13 07:47:56,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23542 states, 23531 states have (on average 1.5084781777230036) internal successors, (35496), 23541 states have internal predecessors, (35496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:56,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23542 states to 23542 states and 35496 transitions. [2021-10-13 07:47:56,414 INFO L78 Accepts]: Start accepts. Automaton has 23542 states and 35496 transitions. Word has length 56 [2021-10-13 07:47:56,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:47:56,414 INFO L470 AbstractCegarLoop]: Abstraction has 23542 states and 35496 transitions. [2021-10-13 07:47:56,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.066666666666666) internal successors, (91), 14 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 07:47:56,415 INFO L276 IsEmpty]: Start isEmpty. Operand 23542 states and 35496 transitions. [2021-10-13 07:47:56,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-10-13 07:47:56,418 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:47:56,418 INFO L512 BasicCegarLoop]: trace histogram [10, 6, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:47:56,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:56,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:56,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-10-13 07:47:57,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:47:57,033 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 07:47:57,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:47:57,033 INFO L82 PathProgramCache]: Analyzing trace with hash 797221759, now seen corresponding path program 1 times [2021-10-13 07:47:57,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:47:57,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714396431] [2021-10-13 07:47:57,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:57,034 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:47:57,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:47:57,035 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:47:57,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-10-13 07:47:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:47:57,924 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:47:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:47:58,125 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 07:47:58,125 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:47:58,127 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 07:47:58,129 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 07:47:58,129 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 07:47:58,129 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-13 07:47:58,130 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-13 07:47:58,130 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-13 07:47:58,130 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-13 07:47:58,130 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-13 07:47:58,130 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-13 07:47:58,131 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-13 07:47:58,131 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-13 07:47:58,131 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-13 07:47:58,131 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-13 07:47:58,131 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-13 07:47:58,132 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-13 07:47:58,132 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-13 07:47:58,132 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-13 07:47:58,132 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:47:58,132 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:47:58,133 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:47:58,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:58,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:47:58,345 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:47:58,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:47:58 BoogieIcfgContainer [2021-10-13 07:47:58,448 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:47:58,449 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:47:58,449 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:47:58,449 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:47:58,450 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:47:10" (3/4) ... [2021-10-13 07:47:58,453 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 07:47:58,453 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:47:58,455 INFO L168 Benchmark]: Toolchain (without parser) took 49933.23 ms. Allocated memory was 73.4 MB in the beginning and 341.8 MB in the end (delta: 268.4 MB). Free memory was 58.2 MB in the beginning and 172.3 MB in the end (delta: -114.1 MB). Peak memory consumption was 154.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:47:58,455 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 73.4 MB. Free memory was 54.9 MB in the beginning and 54.8 MB in the end (delta: 63.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:47:58,456 INFO L168 Benchmark]: CACSL2BoogieTranslator took 705.10 ms. Allocated memory is still 73.4 MB. Free memory was 58.1 MB in the beginning and 49.9 MB in the end (delta: 8.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:47:58,456 INFO L168 Benchmark]: Boogie Procedure Inliner took 83.65 ms. Allocated memory is still 73.4 MB. Free memory was 49.9 MB in the beginning and 47.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:47:58,457 INFO L168 Benchmark]: Boogie Preprocessor took 62.13 ms. Allocated memory is still 73.4 MB. Free memory was 47.8 MB in the beginning and 46.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:47:58,457 INFO L168 Benchmark]: RCFGBuilder took 945.35 ms. Allocated memory is still 73.4 MB. Free memory was 46.0 MB in the beginning and 52.7 MB in the end (delta: -6.7 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:47:58,458 INFO L168 Benchmark]: TraceAbstraction took 48124.82 ms. Allocated memory was 73.4 MB in the beginning and 341.8 MB in the end (delta: 268.4 MB). Free memory was 52.1 MB in the beginning and 172.3 MB in the end (delta: -120.2 MB). Peak memory consumption was 149.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:47:58,458 INFO L168 Benchmark]: Witness Printer took 4.47 ms. Allocated memory is still 341.8 MB. Free memory is still 172.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:47:58,460 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 73.4 MB. Free memory was 54.9 MB in the beginning and 54.8 MB in the end (delta: 63.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 705.10 ms. Allocated memory is still 73.4 MB. Free memory was 58.1 MB in the beginning and 49.9 MB in the end (delta: 8.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 83.65 ms. Allocated memory is still 73.4 MB. Free memory was 49.9 MB in the beginning and 47.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 62.13 ms. Allocated memory is still 73.4 MB. Free memory was 47.8 MB in the beginning and 46.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 945.35 ms. Allocated memory is still 73.4 MB. Free memory was 46.0 MB in the beginning and 52.7 MB in the end (delta: -6.7 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 48124.82 ms. Allocated memory was 73.4 MB in the beginning and 341.8 MB in the end (delta: 268.4 MB). Free memory was 52.1 MB in the beginning and 172.3 MB in the end (delta: -120.2 MB). Peak memory consumption was 149.1 MB. Max. memory is 16.1 GB. * Witness Printer took 4.47 ms. Allocated memory is still 341.8 MB. Free memory is still 172.3 MB. There was no memory consumed. 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 - UnprovableResult [Line: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; VAL [garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) [L538] x1->data = 0 VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L541] case 2: VAL [garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L542] x1->data = 4 VAL [garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L545] t1 = S VAL [garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: VAL [garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L548] x1->next = t1 VAL [garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: VAL [garbage={0:0}, pc1=6, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L551] COND TRUE S == t1 [L552] S = x1 VAL [garbage={0:0}, pc1=6, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L567] pc4++ [L568] case 1: [L569] t4 = S VAL [garbage={0:0}, pc1=6, pc4=2, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L567] pc4++ [L568] case 1: [L571] case 2: VAL [garbage={0:0}, pc1=6, pc4=3, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L572] COND FALSE !(t4 == ((void *)0)) VAL [garbage={0:0}, pc1=6, pc4=3, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L567] pc4++ [L568] case 1: [L571] case 2: [L575] case 3: VAL [garbage={0:0}, pc1=6, pc4=4, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L576] EXPR t4->next VAL [garbage={0:0}, pc1=6, pc4=4, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L576] x4 = t4->next [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L567] pc4++ [L568] case 1: [L571] case 2: [L575] case 3: [L578] case 4: VAL [garbage={0:0}, pc1=6, pc4=5, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L579] COND TRUE S == t4 [L580] S = x4 VAL [garbage={0:0}, pc1=6, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: [L556] case 6: [L557] pc1 = 1 VAL [garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L594] COND FALSE !(S || 1 != pc1 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) VAL [garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 60 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 47937.7ms, OverallIterations: 19, TraceHistogramMax: 10, EmptinessCheckTime: 58.8ms, AutomataDifference: 7367.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2370 SDtfs, 9999 SDslu, 7600 SDs, 0 SdLazy, 1669 SolverSat, 686 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3297.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2330 GetRequests, 2083 SyntacticMatches, 7 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1687 ImplicationChecksByTransitivity, 3521.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=23542occurred in iteration=18, InterpolantAutomatonStates: 210, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2049.7ms AutomataMinimizationTime, 18 MinimizatonAttempts, 17431 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 587.9ms SsaConstructionTime, 1649.9ms SatisfiabilityAnalysisTime, 13142.2ms InterpolantComputationTime, 1193 NumberOfCodeBlocks, 1193 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 2170 ConstructedInterpolants, 0 QuantifiedInterpolants, 10037 SizeOfPredicates, 120 NumberOfNonLiveVariables, 4624 ConjunctsInSsa, 280 ConjunctsInUnsatCore, 84 InterpolantComputations, 15 PerfectInterpolantSequences, 1702/2994 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-13 07:47:58,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e1558ba-c794-46d0-a2df-11d45e1b972d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...