./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI --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 56b28f59847d63942ec468b0c95f39e5b8c0763a ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:25:58,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:25:58,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:25:59,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:25:59,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:25:59,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:25:59,035 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:25:59,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:25:59,042 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:25:59,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:25:59,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:25:59,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:25:59,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:25:59,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:25:59,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:25:59,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:25:59,063 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:25:59,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:25:59,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:25:59,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:25:59,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:25:59,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:25:59,087 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:25:59,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:25:59,092 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:25:59,093 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:25:59,093 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:25:59,096 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:25:59,096 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:25:59,098 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:25:59,098 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:25:59,099 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:25:59,101 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:25:59,103 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:25:59,104 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:25:59,104 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:25:59,105 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:25:59,106 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:25:59,106 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:25:59,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:25:59,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:25:59,110 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-11 02:25:59,161 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:25:59,161 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:25:59,162 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:25:59,163 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:25:59,163 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:25:59,163 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:25:59,163 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:25:59,164 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:25:59,164 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:25:59,164 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:25:59,165 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:25:59,165 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:25:59,166 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:25:59,166 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:25:59,166 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:25:59,167 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 02:25:59,167 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 02:25:59,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:25:59,167 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:25:59,168 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:25:59,168 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:25:59,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:25:59,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:25:59,168 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 02:25:59,168 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 02:25:59,169 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 02:25:59,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:25:59,169 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:25:59,169 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:25:59,169 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:25:59,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:25:59,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:25:59,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:25:59,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:25:59,171 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:25:59,171 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:25:59,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:25:59,171 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:25:59,171 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:25:59,172 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_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56b28f59847d63942ec468b0c95f39e5b8c0763a [2021-10-11 02:25:59,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:25:59,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:25:59,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:25:59,530 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:25:59,532 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:25:59,534 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c [2021-10-11 02:25:59,627 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/data/75062735a/5fdc3467be12465d99f4210e8fade8bc/FLAGedb7ad843 [2021-10-11 02:26:00,092 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:26:00,093 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c [2021-10-11 02:26:00,100 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/data/75062735a/5fdc3467be12465d99f4210e8fade8bc/FLAGedb7ad843 [2021-10-11 02:26:00,460 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/data/75062735a/5fdc3467be12465d99f4210e8fade8bc [2021-10-11 02:26:00,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:26:00,464 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:26:00,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:00,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:26:00,471 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:26:00,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:00" (1/1) ... [2021-10-11 02:26:00,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a1782cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:00, skipping insertion in model container [2021-10-11 02:26:00,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:00" (1/1) ... [2021-10-11 02:26:00,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:26:00,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:26:00,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:00,673 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:26:00,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:00,703 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:26:00,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:00 WrapperNode [2021-10-11 02:26:00,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:00,705 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:00,705 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:26:00,706 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:26:00,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:00" (1/1) ... [2021-10-11 02:26:00,719 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:00" (1/1) ... [2021-10-11 02:26:00,739 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:00,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:26:00,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:26:00,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:26:00,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:00" (1/1) ... [2021-10-11 02:26:00,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:00" (1/1) ... [2021-10-11 02:26:00,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:00" (1/1) ... [2021-10-11 02:26:00,752 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:00" (1/1) ... [2021-10-11 02:26:00,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:00" (1/1) ... [2021-10-11 02:26:00,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:00" (1/1) ... [2021-10-11 02:26:00,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:00" (1/1) ... [2021-10-11 02:26:00,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:26:00,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:26:00,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:26:00,767 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:26:00,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:00" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:26:00,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:26:00,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:26:00,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:26:00,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:26:00,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:26:00,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:26:01,279 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:26:01,279 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-11 02:26:01,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:01 BoogieIcfgContainer [2021-10-11 02:26:01,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:26:01,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:26:01,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:26:01,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:26:01,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:26:00" (1/3) ... [2021-10-11 02:26:01,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f10bbdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:01, skipping insertion in model container [2021-10-11 02:26:01,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:00" (2/3) ... [2021-10-11 02:26:01,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f10bbdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:01, skipping insertion in model container [2021-10-11 02:26:01,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:01" (3/3) ... [2021-10-11 02:26:01,301 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration.c [2021-10-11 02:26:01,312 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:26:01,315 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2021-10-11 02:26:01,325 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-10-11 02:26:01,342 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:26:01,342 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 02:26:01,342 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:26:01,343 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:26:01,343 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:26:01,343 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:26:01,343 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:26:01,343 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:26:01,357 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2021-10-11 02:26:01,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:26:01,364 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:01,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:26:01,365 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:26:01,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:01,371 INFO L82 PathProgramCache]: Analyzing trace with hash 3150815, now seen corresponding path program 1 times [2021-10-11 02:26:01,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:01,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067321542] [2021-10-11 02:26:01,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:01,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:01,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067321542] [2021-10-11 02:26:01,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:01,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:26:01,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292940980] [2021-10-11 02:26:01,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:26:01,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:01,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:26:01,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:01,639 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2021-10-11 02:26:01,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:01,733 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-10-11 02:26:01,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:01,735 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2021-10-11 02:26:01,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:01,754 INFO L225 Difference]: With dead ends: 37 [2021-10-11 02:26:01,755 INFO L226 Difference]: Without dead ends: 35 [2021-10-11 02:26:01,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:01,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-11 02:26:01,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2021-10-11 02:26:01,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-11 02:26:01,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-10-11 02:26:01,796 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2021-10-11 02:26:01,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:01,797 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-10-11 02:26:01,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:26:01,797 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-10-11 02:26:01,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:26:01,798 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:01,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:26:01,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:26:01,799 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:26:01,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:01,803 INFO L82 PathProgramCache]: Analyzing trace with hash 3078660, now seen corresponding path program 1 times [2021-10-11 02:26:01,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:01,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492315472] [2021-10-11 02:26:01,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:01,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492315472] [2021-10-11 02:26:01,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:01,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:26:01,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059493597] [2021-10-11 02:26:01,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:26:01,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:01,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:26:01,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:01,880 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2021-10-11 02:26:01,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:01,914 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-10-11 02:26:01,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:01,914 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2021-10-11 02:26:01,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:01,920 INFO L225 Difference]: With dead ends: 37 [2021-10-11 02:26:01,920 INFO L226 Difference]: Without dead ends: 37 [2021-10-11 02:26:01,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:01,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-11 02:26:01,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2021-10-11 02:26:01,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-11 02:26:01,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-10-11 02:26:01,929 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 4 [2021-10-11 02:26:01,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:01,929 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-10-11 02:26:01,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:26:01,931 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-10-11 02:26:01,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:26:01,932 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:01,932 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:26:01,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:26:01,932 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:26:01,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:01,933 INFO L82 PathProgramCache]: Analyzing trace with hash 3080752, now seen corresponding path program 1 times [2021-10-11 02:26:01,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:01,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511362715] [2021-10-11 02:26:01,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:01,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:02,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511362715] [2021-10-11 02:26:02,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:02,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:26:02,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921892852] [2021-10-11 02:26:02,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:02,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:02,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:02,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:02,034 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 4 states. [2021-10-11 02:26:02,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:02,135 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-10-11 02:26:02,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:26:02,136 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2021-10-11 02:26:02,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:02,138 INFO L225 Difference]: With dead ends: 42 [2021-10-11 02:26:02,139 INFO L226 Difference]: Without dead ends: 42 [2021-10-11 02:26:02,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:26:02,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-11 02:26:02,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 23. [2021-10-11 02:26:02,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-11 02:26:02,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-10-11 02:26:02,146 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 4 [2021-10-11 02:26:02,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:02,146 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-10-11 02:26:02,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:02,146 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-10-11 02:26:02,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:26:02,146 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:02,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:26:02,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:26:02,147 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:26:02,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:02,147 INFO L82 PathProgramCache]: Analyzing trace with hash 95438513, now seen corresponding path program 1 times [2021-10-11 02:26:02,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:02,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116871065] [2021-10-11 02:26:02,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:02,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:02,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116871065] [2021-10-11 02:26:02,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:02,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:26:02,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845928557] [2021-10-11 02:26:02,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:02,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:02,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:02,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:02,188 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 4 states. [2021-10-11 02:26:02,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:02,267 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-10-11 02:26:02,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:26:02,268 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2021-10-11 02:26:02,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:02,268 INFO L225 Difference]: With dead ends: 22 [2021-10-11 02:26:02,269 INFO L226 Difference]: Without dead ends: 22 [2021-10-11 02:26:02,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:26:02,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-11 02:26:02,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-11 02:26:02,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-11 02:26:02,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-10-11 02:26:02,273 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 5 [2021-10-11 02:26:02,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:02,273 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-10-11 02:26:02,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:02,274 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-10-11 02:26:02,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:26:02,274 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:02,274 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:26:02,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:26:02,275 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:26:02,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:02,275 INFO L82 PathProgramCache]: Analyzing trace with hash 95438514, now seen corresponding path program 1 times [2021-10-11 02:26:02,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:02,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55424633] [2021-10-11 02:26:02,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:02,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:02,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:02,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55424633] [2021-10-11 02:26:02,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:02,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:26:02,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240015060] [2021-10-11 02:26:02,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:02,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:02,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:02,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:02,322 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 4 states. [2021-10-11 02:26:02,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:02,387 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-10-11 02:26:02,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:26:02,388 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2021-10-11 02:26:02,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:02,389 INFO L225 Difference]: With dead ends: 35 [2021-10-11 02:26:02,389 INFO L226 Difference]: Without dead ends: 35 [2021-10-11 02:26:02,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:26:02,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-11 02:26:02,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 23. [2021-10-11 02:26:02,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-11 02:26:02,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-10-11 02:26:02,393 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 5 [2021-10-11 02:26:02,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:02,394 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-10-11 02:26:02,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:02,394 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-10-11 02:26:02,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:26:02,395 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:02,395 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-10-11 02:26:02,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 02:26:02,395 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:26:02,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:02,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1522149287, now seen corresponding path program 1 times [2021-10-11 02:26:02,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:02,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476757282] [2021-10-11 02:26:02,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:02,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:02,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476757282] [2021-10-11 02:26:02,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212854680] [2021-10-11 02:26:02,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:02,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:26:02,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:02,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:02,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:02,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:26:02,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 9 [2021-10-11 02:26:02,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792015225] [2021-10-11 02:26:02,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 02:26:02,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:02,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 02:26:02,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:26:02,708 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 7 states. [2021-10-11 02:26:02,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:02,831 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2021-10-11 02:26:02,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 02:26:02,833 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2021-10-11 02:26:02,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:02,834 INFO L225 Difference]: With dead ends: 50 [2021-10-11 02:26:02,841 INFO L226 Difference]: Without dead ends: 50 [2021-10-11 02:26:02,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:26:02,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-11 02:26:02,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 26. [2021-10-11 02:26:02,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-11 02:26:02,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-10-11 02:26:02,854 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 7 [2021-10-11 02:26:02,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:02,855 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-10-11 02:26:02,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 02:26:02,855 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-10-11 02:26:02,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:26:02,856 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:02,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:03,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-11 02:26:03,075 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:26:03,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:03,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1522151379, now seen corresponding path program 1 times [2021-10-11 02:26:03,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:03,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758922096] [2021-10-11 02:26:03,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:03,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758922096] [2021-10-11 02:26:03,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:03,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:26:03,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981862946] [2021-10-11 02:26:03,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:26:03,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:03,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:26:03,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:26:03,189 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2021-10-11 02:26:03,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:03,214 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2021-10-11 02:26:03,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:03,215 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2021-10-11 02:26:03,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:03,219 INFO L225 Difference]: With dead ends: 24 [2021-10-11 02:26:03,219 INFO L226 Difference]: Without dead ends: 24 [2021-10-11 02:26:03,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:26:03,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-11 02:26:03,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-11 02:26:03,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-11 02:26:03,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-10-11 02:26:03,224 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2021-10-11 02:26:03,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:03,224 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-10-11 02:26:03,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:26:03,224 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-10-11 02:26:03,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:26:03,224 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:03,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:03,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-11 02:26:03,225 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:26:03,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:03,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1522151380, now seen corresponding path program 1 times [2021-10-11 02:26:03,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:03,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201551395] [2021-10-11 02:26:03,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:03,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:03,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:26:03,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201551395] [2021-10-11 02:26:03,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:03,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:26:03,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467022401] [2021-10-11 02:26:03,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:03,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:03,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:03,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:03,279 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 4 states. [2021-10-11 02:26:03,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:03,313 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-10-11 02:26:03,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:03,313 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-10-11 02:26:03,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:03,314 INFO L225 Difference]: With dead ends: 25 [2021-10-11 02:26:03,314 INFO L226 Difference]: Without dead ends: 25 [2021-10-11 02:26:03,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:03,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-11 02:26:03,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-10-11 02:26:03,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-10-11 02:26:03,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-10-11 02:26:03,317 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 7 [2021-10-11 02:26:03,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:03,317 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-10-11 02:26:03,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:03,317 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-10-11 02:26:03,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:26:03,318 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:03,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:03,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-11 02:26:03,318 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:26:03,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:03,319 INFO L82 PathProgramCache]: Analyzing trace with hash 148383000, now seen corresponding path program 1 times [2021-10-11 02:26:03,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:03,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505815336] [2021-10-11 02:26:03,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:26:03,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505815336] [2021-10-11 02:26:03,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240723835] [2021-10-11 02:26:03,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:03,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:26:03,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:03,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:26:03,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:03,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:26:03,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [460521142] [2021-10-11 02:26:03,550 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-11 02:26:03,551 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:26:03,556 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:26:03,562 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:26:03,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:26:03,816 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:04,104 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:04,183 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:04,925 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:26:05,299 WARN L197 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2021-10-11 02:26:05,618 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-10-11 02:26:05,757 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-10-11 02:26:05,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:26:05,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 12 [2021-10-11 02:26:05,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448488617] [2021-10-11 02:26:05,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:26:05,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:05,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:26:05,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:26:05,827 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 8 states. [2021-10-11 02:26:06,206 WARN L197 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 83 [2021-10-11 02:26:06,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:06,297 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-10-11 02:26:06,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 02:26:06,297 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2021-10-11 02:26:06,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:06,298 INFO L225 Difference]: With dead ends: 27 [2021-10-11 02:26:06,298 INFO L226 Difference]: Without dead ends: 27 [2021-10-11 02:26:06,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-10-11 02:26:06,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-11 02:26:06,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-10-11 02:26:06,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-11 02:26:06,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-10-11 02:26:06,301 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 10 [2021-10-11 02:26:06,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:06,302 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-10-11 02:26:06,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:26:06,302 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-10-11 02:26:06,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:26:06,302 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:06,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:06,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:06,511 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:26:06,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:06,511 INFO L82 PathProgramCache]: Analyzing trace with hash 862142579, now seen corresponding path program 1 times [2021-10-11 02:26:06,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:06,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877601223] [2021-10-11 02:26:06,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:26:06,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877601223] [2021-10-11 02:26:06,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901151605] [2021-10-11 02:26:06,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:06,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:06,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:26:06,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:26:06,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:26:06,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [114471092] [2021-10-11 02:26:06,649 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-10-11 02:26:06,649 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:26:06,650 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:26:06,650 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:26:06,650 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:26:06,740 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:06,915 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:06,968 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:07,605 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:26:07,980 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2021-10-11 02:26:08,437 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-10-11 02:26:08,628 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:26:08,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:26:08,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-10-11 02:26:08,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508972974] [2021-10-11 02:26:08,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 02:26:08,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:08,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 02:26:08,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-10-11 02:26:08,630 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 7 states. [2021-10-11 02:26:08,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:08,699 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2021-10-11 02:26:08,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:26:08,700 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2021-10-11 02:26:08,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:08,701 INFO L225 Difference]: With dead ends: 67 [2021-10-11 02:26:08,701 INFO L226 Difference]: Without dead ends: 67 [2021-10-11 02:26:08,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-10-11 02:26:08,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-11 02:26:08,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2021-10-11 02:26:08,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-10-11 02:26:08,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2021-10-11 02:26:08,717 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 12 [2021-10-11 02:26:08,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:08,717 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2021-10-11 02:26:08,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 02:26:08,717 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2021-10-11 02:26:08,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-11 02:26:08,718 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:08,718 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2021-10-11 02:26:08,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-10-11 02:26:08,943 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:26:08,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:08,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1163785730, now seen corresponding path program 1 times [2021-10-11 02:26:08,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:08,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380009527] [2021-10-11 02:26:08,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:08,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:26:09,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380009527] [2021-10-11 02:26:09,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833031637] [2021-10-11 02:26:09,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:09,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-11 02:26:09,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:09,075 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:26:09,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:26:09,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1626014608] [2021-10-11 02:26:09,109 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:26:09,110 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:26:09,110 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:26:09,110 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:26:09,110 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:26:09,177 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:09,320 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:09,366 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:09,804 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:26:10,269 WARN L197 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2021-10-11 02:26:10,749 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-10-11 02:26:10,750 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:26:10,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:26:10,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-10-11 02:26:10,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006335481] [2021-10-11 02:26:10,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:26:10,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:10,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:26:10,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-11 02:26:10,752 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand 6 states. [2021-10-11 02:26:10,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:10,829 INFO L93 Difference]: Finished difference Result 146 states and 202 transitions. [2021-10-11 02:26:10,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:26:10,831 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2021-10-11 02:26:10,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:10,833 INFO L225 Difference]: With dead ends: 146 [2021-10-11 02:26:10,833 INFO L226 Difference]: Without dead ends: 146 [2021-10-11 02:26:10,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:26:10,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-11 02:26:10,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 75. [2021-10-11 02:26:10,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-10-11 02:26:10,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 106 transitions. [2021-10-11 02:26:10,850 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 106 transitions. Word has length 13 [2021-10-11 02:26:10,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:10,850 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 106 transitions. [2021-10-11 02:26:10,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:26:10,851 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 106 transitions. [2021-10-11 02:26:10,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-11 02:26:10,851 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:10,852 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1] [2021-10-11 02:26:11,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:11,071 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:26:11,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:11,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1163783637, now seen corresponding path program 1 times [2021-10-11 02:26:11,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:11,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034625210] [2021-10-11 02:26:11,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:11,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:26:11,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034625210] [2021-10-11 02:26:11,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193134166] [2021-10-11 02:26:11,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:11,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:11,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 02:26:11,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:26:11,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:26:11,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1161795883] [2021-10-11 02:26:11,249 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:26:11,249 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:26:11,249 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:26:11,249 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:26:11,249 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:26:11,309 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:11,418 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:11,470 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:11,832 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:26:11,972 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-10-11 02:26:12,307 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2021-10-11 02:26:12,744 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-10-11 02:26:12,745 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:26:12,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:26:12,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-10-11 02:26:12,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867560295] [2021-10-11 02:26:12,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-10-11 02:26:12,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:12,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-11 02:26:12,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-10-11 02:26:12,747 INFO L87 Difference]: Start difference. First operand 75 states and 106 transitions. Second operand 10 states. [2021-10-11 02:26:12,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:12,896 INFO L93 Difference]: Finished difference Result 78 states and 104 transitions. [2021-10-11 02:26:12,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 02:26:12,897 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2021-10-11 02:26:12,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:12,897 INFO L225 Difference]: With dead ends: 78 [2021-10-11 02:26:12,897 INFO L226 Difference]: Without dead ends: 78 [2021-10-11 02:26:12,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-10-11 02:26:12,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-11 02:26:12,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2021-10-11 02:26:12,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-10-11 02:26:12,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 103 transitions. [2021-10-11 02:26:12,902 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 103 transitions. Word has length 13 [2021-10-11 02:26:12,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:12,902 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 103 transitions. [2021-10-11 02:26:12,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-10-11 02:26:12,903 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 103 transitions. [2021-10-11 02:26:12,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-11 02:26:12,903 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:12,903 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2021-10-11 02:26:13,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:13,127 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:26:13,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:13,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1717619208, now seen corresponding path program 1 times [2021-10-11 02:26:13,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:13,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189583484] [2021-10-11 02:26:13,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:13,192 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-11 02:26:13,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189583484] [2021-10-11 02:26:13,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305487] [2021-10-11 02:26:13,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:13,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-11 02:26:13,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:13,304 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:26:13,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:13,352 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:26:13,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [435045171] [2021-10-11 02:26:13,357 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:26:13,358 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:26:13,358 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:26:13,358 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:26:13,358 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:26:13,414 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:13,506 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:13,553 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:13,954 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:26:14,331 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2021-10-11 02:26:14,761 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:26:14,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:26:14,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2021-10-11 02:26:14,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311009889] [2021-10-11 02:26:14,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-10-11 02:26:14,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:14,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-11 02:26:14,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-11 02:26:14,763 INFO L87 Difference]: Start difference. First operand 75 states and 103 transitions. Second operand 10 states. [2021-10-11 02:26:14,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:14,986 INFO L93 Difference]: Finished difference Result 120 states and 158 transitions. [2021-10-11 02:26:14,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-11 02:26:14,986 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2021-10-11 02:26:14,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:14,987 INFO L225 Difference]: With dead ends: 120 [2021-10-11 02:26:14,988 INFO L226 Difference]: Without dead ends: 120 [2021-10-11 02:26:14,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-10-11 02:26:14,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-11 02:26:14,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 74. [2021-10-11 02:26:14,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-10-11 02:26:14,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2021-10-11 02:26:14,993 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 14 [2021-10-11 02:26:14,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:14,993 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2021-10-11 02:26:14,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-10-11 02:26:14,993 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2021-10-11 02:26:14,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-11 02:26:14,993 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:14,994 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1] [2021-10-11 02:26:15,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:15,194 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:26:15,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:15,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1364564582, now seen corresponding path program 2 times [2021-10-11 02:26:15,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:15,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164905255] [2021-10-11 02:26:15,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:15,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-11 02:26:15,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164905255] [2021-10-11 02:26:15,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510411445] [2021-10-11 02:26:15,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:15,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 02:26:15,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:26:15,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-11 02:26:15,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-11 02:26:15,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-11 02:26:15,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1822938545] [2021-10-11 02:26:15,428 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:26:15,429 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:26:15,429 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:26:15,429 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:26:15,429 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:26:15,480 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:15,568 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:15,619 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:15,973 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:26:16,113 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-10-11 02:26:16,466 WARN L197 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2021-10-11 02:26:16,858 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:26:16,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:26:16,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 8 [2021-10-11 02:26:16,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958089385] [2021-10-11 02:26:16,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-10-11 02:26:16,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:16,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-11 02:26:16,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-10-11 02:26:16,860 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand 10 states. [2021-10-11 02:26:16,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:16,959 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2021-10-11 02:26:16,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:26:16,960 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2021-10-11 02:26:16,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:16,960 INFO L225 Difference]: With dead ends: 92 [2021-10-11 02:26:16,960 INFO L226 Difference]: Without dead ends: 92 [2021-10-11 02:26:16,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-10-11 02:26:16,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-11 02:26:16,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2021-10-11 02:26:16,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-10-11 02:26:16,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 111 transitions. [2021-10-11 02:26:16,965 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 111 transitions. Word has length 16 [2021-10-11 02:26:16,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:16,965 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 111 transitions. [2021-10-11 02:26:16,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-10-11 02:26:16,965 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 111 transitions. [2021-10-11 02:26:16,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-11 02:26:16,966 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:16,966 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1] [2021-10-11 02:26:17,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:17,189 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:26:17,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:17,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1721852877, now seen corresponding path program 2 times [2021-10-11 02:26:17,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:17,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287940944] [2021-10-11 02:26:17,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:17,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:17,261 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-11 02:26:17,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287940944] [2021-10-11 02:26:17,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923592318] [2021-10-11 02:26:17,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:17,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 02:26:17,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:26:17,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 02:26:17,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:17,365 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-11 02:26:17,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:17,446 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-11 02:26:17,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1831415299] [2021-10-11 02:26:17,450 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:26:17,451 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:26:17,451 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:26:17,451 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:26:17,451 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:26:17,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:17,601 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:17,636 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:17,956 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:26:18,314 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2021-10-11 02:26:18,670 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:26:18,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:26:18,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 15 [2021-10-11 02:26:18,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876219724] [2021-10-11 02:26:18,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-10-11 02:26:18,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:18,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-11 02:26:18,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-10-11 02:26:18,672 INFO L87 Difference]: Start difference. First operand 89 states and 111 transitions. Second operand 15 states. [2021-10-11 02:26:18,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:18,999 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2021-10-11 02:26:18,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-11 02:26:18,999 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2021-10-11 02:26:18,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:18,999 INFO L225 Difference]: With dead ends: 86 [2021-10-11 02:26:19,000 INFO L226 Difference]: Without dead ends: 86 [2021-10-11 02:26:19,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=223, Invalid=833, Unknown=0, NotChecked=0, Total=1056 [2021-10-11 02:26:19,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-11 02:26:19,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2021-10-11 02:26:19,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-10-11 02:26:19,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2021-10-11 02:26:19,003 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 22 [2021-10-11 02:26:19,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:19,003 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2021-10-11 02:26:19,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-10-11 02:26:19,004 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2021-10-11 02:26:19,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-11 02:26:19,005 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:19,005 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:19,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-10-11 02:26:19,231 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:26:19,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:19,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1364720339, now seen corresponding path program 2 times [2021-10-11 02:26:19,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:19,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451234762] [2021-10-11 02:26:19,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:19,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-11 02:26:19,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451234762] [2021-10-11 02:26:19,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358533561] [2021-10-11 02:26:19,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:19,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-10-11 02:26:19,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:26:19,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 02:26:19,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:19,449 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-10-11 02:26:19,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:19,510 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-10-11 02:26:19,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:26:19,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [7] total 11 [2021-10-11 02:26:19,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838225758] [2021-10-11 02:26:19,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:26:19,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:19,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:26:19,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-11 02:26:19,511 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand 6 states. [2021-10-11 02:26:19,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:19,546 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2021-10-11 02:26:19,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:26:19,546 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2021-10-11 02:26:19,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:19,547 INFO L225 Difference]: With dead ends: 59 [2021-10-11 02:26:19,547 INFO L226 Difference]: Without dead ends: 58 [2021-10-11 02:26:19,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-11 02:26:19,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-11 02:26:19,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2021-10-11 02:26:19,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-10-11 02:26:19,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-10-11 02:26:19,550 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 39 [2021-10-11 02:26:19,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:19,550 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-10-11 02:26:19,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:26:19,550 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-10-11 02:26:19,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-11 02:26:19,551 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:19,551 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2021-10-11 02:26:19,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-10-11 02:26:19,779 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:26:19,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:19,779 INFO L82 PathProgramCache]: Analyzing trace with hash 643346751, now seen corresponding path program 1 times [2021-10-11 02:26:19,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:19,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72846292] [2021-10-11 02:26:19,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:19,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-11 02:26:19,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72846292] [2021-10-11 02:26:19,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7371325] [2021-10-11 02:26:19,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:19,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:19,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-11 02:26:19,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 68 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-11 02:26:19,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:20,031 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 68 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-11 02:26:20,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [458910009] [2021-10-11 02:26:20,032 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-11 02:26:20,032 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:26:20,033 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:26:20,033 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:26:20,033 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:26:20,087 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:20,173 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:20,221 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:20,598 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:26:20,882 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2021-10-11 02:26:21,335 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:26:21,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:26:21,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2021-10-11 02:26:21,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590591407] [2021-10-11 02:26:21,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-10-11 02:26:21,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:21,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-11 02:26:21,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-10-11 02:26:21,337 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 13 states. [2021-10-11 02:26:21,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:21,536 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2021-10-11 02:26:21,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-11 02:26:21,537 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2021-10-11 02:26:21,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:21,537 INFO L225 Difference]: With dead ends: 70 [2021-10-11 02:26:21,537 INFO L226 Difference]: Without dead ends: 70 [2021-10-11 02:26:21,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-10-11 02:26:21,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-11 02:26:21,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2021-10-11 02:26:21,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-10-11 02:26:21,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2021-10-11 02:26:21,540 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 40 [2021-10-11 02:26:21,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:21,540 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2021-10-11 02:26:21,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-10-11 02:26:21,540 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2021-10-11 02:26:21,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-11 02:26:21,541 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:21,541 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2021-10-11 02:26:21,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-10-11 02:26:21,757 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:26:21,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:21,757 INFO L82 PathProgramCache]: Analyzing trace with hash 195207405, now seen corresponding path program 2 times [2021-10-11 02:26:21,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:21,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694195389] [2021-10-11 02:26:21,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:21,824 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-11 02:26:21,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694195389] [2021-10-11 02:26:21,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370295185] [2021-10-11 02:26:21,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:21,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 02:26:21,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:26:21,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-11 02:26:21,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-10-11 02:26:21,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:22,092 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-10-11 02:26:22,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1836966110] [2021-10-11 02:26:22,095 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-11 02:26:22,095 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:26:22,095 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:26:22,095 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:26:22,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:26:22,151 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:22,226 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:22,288 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:22,670 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:26:22,956 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2021-10-11 02:26:23,416 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:26:23,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:26:23,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2021-10-11 02:26:23,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978174775] [2021-10-11 02:26:23,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-10-11 02:26:23,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:23,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-11 02:26:23,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-10-11 02:26:23,417 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 15 states. [2021-10-11 02:26:23,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:23,636 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2021-10-11 02:26:23,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-11 02:26:23,636 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2021-10-11 02:26:23,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:23,637 INFO L225 Difference]: With dead ends: 86 [2021-10-11 02:26:23,637 INFO L226 Difference]: Without dead ends: 86 [2021-10-11 02:26:23,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2021-10-11 02:26:23,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-11 02:26:23,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 69. [2021-10-11 02:26:23,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-10-11 02:26:23,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2021-10-11 02:26:23,640 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 46 [2021-10-11 02:26:23,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:23,640 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2021-10-11 02:26:23,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-10-11 02:26:23,641 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2021-10-11 02:26:23,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-11 02:26:23,642 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:23,642 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 5, 5, 4, 1, 1] [2021-10-11 02:26:23,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-10-11 02:26:23,842 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:26:23,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:23,843 INFO L82 PathProgramCache]: Analyzing trace with hash -468192513, now seen corresponding path program 3 times [2021-10-11 02:26:23,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:23,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408892559] [2021-10-11 02:26:23,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:23,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:23,980 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 57 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-11 02:26:23,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408892559] [2021-10-11 02:26:23,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781875616] [2021-10-11 02:26:23,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:24,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 02:26:24,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:26:24,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-11 02:26:24,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 140 proven. 118 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-11 02:26:24,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:24,274 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 140 proven. 118 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-11 02:26:24,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1867111984] [2021-10-11 02:26:24,276 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:26:24,276 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:26:24,277 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:26:24,277 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:26:24,277 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:26:24,340 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:24,429 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:24,451 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:24,746 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:26:25,122 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2021-10-11 02:26:25,488 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:26:25,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:26:25,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2021-10-11 02:26:25,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278059633] [2021-10-11 02:26:25,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-10-11 02:26:25,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:25,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-11 02:26:25,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-10-11 02:26:25,490 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 20 states. [2021-10-11 02:26:26,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:26,054 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2021-10-11 02:26:26,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-11 02:26:26,054 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2021-10-11 02:26:26,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:26,055 INFO L225 Difference]: With dead ends: 79 [2021-10-11 02:26:26,055 INFO L226 Difference]: Without dead ends: 79 [2021-10-11 02:26:26,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=404, Invalid=1666, Unknown=0, NotChecked=0, Total=2070 [2021-10-11 02:26:26,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-11 02:26:26,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-10-11 02:26:26,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-10-11 02:26:26,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-10-11 02:26:26,058 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 52 [2021-10-11 02:26:26,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:26,058 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-10-11 02:26:26,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-10-11 02:26:26,058 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-10-11 02:26:26,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-11 02:26:26,060 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:26,060 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 4, 1, 1] [2021-10-11 02:26:26,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-10-11 02:26:26,263 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:26:26,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:26,263 INFO L82 PathProgramCache]: Analyzing trace with hash -168928524, now seen corresponding path program 4 times [2021-10-11 02:26:26,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:26,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78089464] [2021-10-11 02:26:26,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:26,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-11 02:26:26,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78089464] [2021-10-11 02:26:26,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682984990] [2021-10-11 02:26:26,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:26,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-11 02:26:26,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:26,779 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-11 02:26:26,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:26,941 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-11 02:26:26,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [516587042] [2021-10-11 02:26:26,944 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:26:26,944 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:26:26,945 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:26:26,945 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:26:26,945 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:26:26,991 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:27,069 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:27,106 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:27,402 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:26:27,553 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-10-11 02:26:27,870 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2021-10-11 02:26:28,254 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:26:28,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:26:28,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 17 [2021-10-11 02:26:28,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528712095] [2021-10-11 02:26:28,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-10-11 02:26:28,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:28,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-11 02:26:28,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-10-11 02:26:28,255 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 19 states. [2021-10-11 02:26:28,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:28,500 INFO L93 Difference]: Finished difference Result 185 states and 200 transitions. [2021-10-11 02:26:28,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-11 02:26:28,500 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2021-10-11 02:26:28,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:28,501 INFO L225 Difference]: With dead ends: 185 [2021-10-11 02:26:28,501 INFO L226 Difference]: Without dead ends: 185 [2021-10-11 02:26:28,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2021-10-11 02:26:28,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-10-11 02:26:28,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-10-11 02:26:28,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2021-10-11 02:26:28,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 200 transitions. [2021-10-11 02:26:28,506 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 200 transitions. Word has length 61 [2021-10-11 02:26:28,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:28,507 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 200 transitions. [2021-10-11 02:26:28,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-10-11 02:26:28,507 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 200 transitions. [2021-10-11 02:26:28,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-11 02:26:28,508 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:28,508 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 5, 5, 4, 4, 1, 1, 1] [2021-10-11 02:26:28,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-10-11 02:26:28,715 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:26:28,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:28,715 INFO L82 PathProgramCache]: Analyzing trace with hash 563326648, now seen corresponding path program 3 times [2021-10-11 02:26:28,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:28,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360680245] [2021-10-11 02:26:28,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 350 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-10-11 02:26:28,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360680245] [2021-10-11 02:26:28,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963125547] [2021-10-11 02:26:28,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:28,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 02:26:28,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:26:28,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-11 02:26:28,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 345 proven. 31 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-11 02:26:29,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 345 proven. 31 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-11 02:26:29,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2138419201] [2021-10-11 02:26:29,454 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-11 02:26:29,454 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:26:29,455 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:26:29,455 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:26:29,455 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:26:29,504 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:29,599 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:29,650 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:30,000 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:26:30,449 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2021-10-11 02:26:31,042 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:26:31,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:26:31,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 12] total 26 [2021-10-11 02:26:31,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403235497] [2021-10-11 02:26:31,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-10-11 02:26:31,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:31,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-11 02:26:31,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1085, Unknown=0, NotChecked=0, Total=1260 [2021-10-11 02:26:31,047 INFO L87 Difference]: Start difference. First operand 185 states and 200 transitions. Second operand 27 states. [2021-10-11 02:26:31,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:31,535 INFO L93 Difference]: Finished difference Result 193 states and 207 transitions. [2021-10-11 02:26:31,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-11 02:26:31,536 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 76 [2021-10-11 02:26:31,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:31,537 INFO L225 Difference]: With dead ends: 193 [2021-10-11 02:26:31,537 INFO L226 Difference]: Without dead ends: 193 [2021-10-11 02:26:31,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=323, Invalid=1747, Unknown=0, NotChecked=0, Total=2070 [2021-10-11 02:26:31,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-10-11 02:26:31,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 188. [2021-10-11 02:26:31,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2021-10-11 02:26:31,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 202 transitions. [2021-10-11 02:26:31,542 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 202 transitions. Word has length 76 [2021-10-11 02:26:31,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:31,542 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 202 transitions. [2021-10-11 02:26:31,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-10-11 02:26:31,542 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 202 transitions. [2021-10-11 02:26:31,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-10-11 02:26:31,544 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:31,544 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 6, 6, 6, 6, 5, 5, 1, 1, 1] [2021-10-11 02:26:31,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:31,759 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:26:31,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:31,759 INFO L82 PathProgramCache]: Analyzing trace with hash -82073872, now seen corresponding path program 4 times [2021-10-11 02:26:31,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:31,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392714957] [2021-10-11 02:26:31,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:31,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 0 proven. 631 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-10-11 02:26:31,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392714957] [2021-10-11 02:26:31,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653088364] [2021-10-11 02:26:31,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:31,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-11 02:26:31,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:32,174 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 361 proven. 305 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-10-11 02:26:32,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 361 proven. 305 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-10-11 02:26:32,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [928971927] [2021-10-11 02:26:32,395 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-11 02:26:32,396 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:26:32,396 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:26:32,396 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:26:32,396 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:26:32,442 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:32,519 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:32,552 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:32,907 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:26:33,322 WARN L197 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2021-10-11 02:26:33,853 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:26:33,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:26:33,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 26 [2021-10-11 02:26:33,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560753639] [2021-10-11 02:26:33,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-10-11 02:26:33,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:33,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-11 02:26:33,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2021-10-11 02:26:33,856 INFO L87 Difference]: Start difference. First operand 188 states and 202 transitions. Second operand 27 states. [2021-10-11 02:26:35,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:35,073 INFO L93 Difference]: Finished difference Result 227 states and 240 transitions. [2021-10-11 02:26:35,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-11 02:26:35,076 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 97 [2021-10-11 02:26:35,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:35,077 INFO L225 Difference]: With dead ends: 227 [2021-10-11 02:26:35,078 INFO L226 Difference]: Without dead ends: 227 [2021-10-11 02:26:35,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=977, Invalid=5029, Unknown=0, NotChecked=0, Total=6006 [2021-10-11 02:26:35,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-10-11 02:26:35,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 206. [2021-10-11 02:26:35,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2021-10-11 02:26:35,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 219 transitions. [2021-10-11 02:26:35,088 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 219 transitions. Word has length 97 [2021-10-11 02:26:35,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:35,089 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 219 transitions. [2021-10-11 02:26:35,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-10-11 02:26:35,089 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 219 transitions. [2021-10-11 02:26:35,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-10-11 02:26:35,094 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:35,094 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 7, 7, 7, 6, 5, 5, 1, 1, 1] [2021-10-11 02:26:35,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:35,307 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:26:35,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:35,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1389824217, now seen corresponding path program 5 times [2021-10-11 02:26:35,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:35,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319503244] [2021-10-11 02:26:35,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:35,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 1135 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-10-11 02:26:35,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319503244] [2021-10-11 02:26:35,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271186218] [2021-10-11 02:26:35,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:35,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 02:26:35,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:26:35,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 02:26:35,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:35,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 1331 trivial. 0 not checked. [2021-10-11 02:26:35,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1331 trivial. 0 not checked. [2021-10-11 02:26:35,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:26:35,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 6] total 20 [2021-10-11 02:26:35,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596924076] [2021-10-11 02:26:35,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 02:26:35,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:35,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 02:26:35,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-10-11 02:26:35,930 INFO L87 Difference]: Start difference. First operand 206 states and 219 transitions. Second operand 7 states. [2021-10-11 02:26:36,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:36,014 INFO L93 Difference]: Finished difference Result 204 states and 217 transitions. [2021-10-11 02:26:36,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:26:36,014 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 121 [2021-10-11 02:26:36,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:36,015 INFO L225 Difference]: With dead ends: 204 [2021-10-11 02:26:36,015 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:26:36,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-10-11 02:26:36,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:26:36,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:26:36,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:26:36,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:26:36,016 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 121 [2021-10-11 02:26:36,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:36,016 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:26:36,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 02:26:36,017 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:26:36,017 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:26:36,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable759,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:36,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:26:36 BoogieIcfgContainer [2021-10-11 02:26:36,231 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:26:36,231 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:26:36,231 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:26:36,231 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:26:36,232 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:01" (3/4) ... [2021-10-11 02:26:36,235 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:26:36,243 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2021-10-11 02:26:36,244 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-11 02:26:36,244 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-11 02:26:36,275 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47da9e1-a9db-44f1-a9e1-bfb450c16a33/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:26:36,275 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:26:36,276 INFO L168 Benchmark]: Toolchain (without parser) took 35811.66 ms. Allocated memory was 92.3 MB in the beginning and 373.3 MB in the end (delta: 281.0 MB). Free memory was 57.3 MB in the beginning and 255.2 MB in the end (delta: -197.9 MB). Peak memory consumption was 82.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:36,276 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 92.3 MB. Free memory is still 74.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:36,277 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.32 ms. Allocated memory is still 92.3 MB. Free memory was 57.1 MB in the beginning and 70.3 MB in the end (delta: -13.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:36,277 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.98 ms. Allocated memory is still 92.3 MB. Free memory was 70.3 MB in the beginning and 68.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:36,277 INFO L168 Benchmark]: Boogie Preprocessor took 25.84 ms. Allocated memory is still 92.3 MB. Free memory was 68.6 MB in the beginning and 67.7 MB in the end (delta: 885.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:36,278 INFO L168 Benchmark]: RCFGBuilder took 515.70 ms. Allocated memory is still 92.3 MB. Free memory was 67.4 MB in the beginning and 45.8 MB in the end (delta: 21.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:36,278 INFO L168 Benchmark]: TraceAbstraction took 34946.94 ms. Allocated memory was 92.3 MB in the beginning and 373.3 MB in the end (delta: 281.0 MB). Free memory was 45.2 MB in the beginning and 257.9 MB in the end (delta: -212.7 MB). Peak memory consumption was 70.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:36,279 INFO L168 Benchmark]: Witness Printer took 44.22 ms. Allocated memory is still 373.3 MB. Free memory was 257.9 MB in the beginning and 255.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:36,280 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 92.3 MB. Free memory is still 74.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 238.32 ms. Allocated memory is still 92.3 MB. Free memory was 57.1 MB in the beginning and 70.3 MB in the end (delta: -13.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.98 ms. Allocated memory is still 92.3 MB. Free memory was 70.3 MB in the beginning and 68.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.84 ms. Allocated memory is still 92.3 MB. Free memory was 68.6 MB in the beginning and 67.7 MB in the end (delta: 885.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 515.70 ms. Allocated memory is still 92.3 MB. Free memory was 67.4 MB in the beginning and 45.8 MB in the end (delta: 21.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 34946.94 ms. Allocated memory was 92.3 MB in the beginning and 373.3 MB in the end (delta: 281.0 MB). Free memory was 45.2 MB in the beginning and 257.9 MB in the end (delta: -212.7 MB). Peak memory consumption was 70.9 MB. Max. memory is 16.1 GB. * Witness Printer took 44.22 ms. Allocated memory is still 373.3 MB. Free memory was 257.9 MB in the beginning and 255.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 23]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 18]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 34.8s, OverallIterations: 23, TraceHistogramMax: 27, AutomataDifference: 5.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 227 SDtfs, 1490 SDslu, 625 SDs, 0 SdLazy, 2809 SolverSat, 432 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1953 GetRequests, 1524 SyntacticMatches, 5 SemanticMatches, 424 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4047 ImplicationChecksByTransitivity, 15.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=206occurred in iteration=22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 23 MinimizatonAttempts, 314 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 4.7s InterpolantComputationTime, 1314 NumberOfCodeBlocks, 1116 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 1898 ConstructedInterpolants, 26 QuantifiedInterpolants, 648565 SizeOfPredicates, 54 NumberOfNonLiveVariables, 2466 ConjunctsInSsa, 164 ConjunctsInUnsatCore, 55 InterpolantComputations, 12 PerfectInterpolantSequences, 6805/11381 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: OVERALL_TIME[ms]: 1376, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 12, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 33, TOOLS_POST_TIME[ms]: 655, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 32, TOOLS_QUANTIFIERELIM_TIME[ms]: 634, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 116, FLUID_QUERY_TIME[ms]: 8, FLUID_QUERIES: 56, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 6, DOMAIN_JOIN_TIME[ms]: 379, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 3, DOMAIN_WIDEN_TIME[ms]: 244, DOMAIN_ISSUBSETEQ_APPLICATIONS: 4, DOMAIN_ISSUBSETEQ_TIME[ms]: 17, DOMAIN_ISBOTTOM_APPLICATIONS: 12, DOMAIN_ISBOTTOM_TIME[ms]: 23, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 1080, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 1080, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 4, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 4, PATH_EXPR_TIME[ms]: 4, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 8, DAG_COMPRESSION_PROCESSED_NODES: 77, DAG_COMPRESSION_RETAINED_NODES: 31, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...