./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan --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 97f817c294f65682bc18734ad52a0295ea6b342c .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 13:20:36,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 13:20:36,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 13:20:36,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 13:20:36,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 13:20:36,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 13:20:36,117 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 13:20:36,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 13:20:36,121 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 13:20:36,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 13:20:36,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 13:20:36,123 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 13:20:36,124 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 13:20:36,124 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 13:20:36,125 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 13:20:36,126 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 13:20:36,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 13:20:36,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 13:20:36,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 13:20:36,129 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 13:20:36,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 13:20:36,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 13:20:36,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 13:20:36,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 13:20:36,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 13:20:36,134 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 13:20:36,134 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 13:20:36,135 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 13:20:36,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 13:20:36,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 13:20:36,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 13:20:36,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 13:20:36,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 13:20:36,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 13:20:36,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 13:20:36,139 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 13:20:36,139 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 13:20:36,139 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 13:20:36,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 13:20:36,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 13:20:36,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 13:20:36,141 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2019-12-07 13:20:36,154 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 13:20:36,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 13:20:36,154 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 13:20:36,155 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 13:20:36,155 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 13:20:36,155 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 13:20:36,155 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 13:20:36,155 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 13:20:36,155 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 13:20:36,156 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 13:20:36,156 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 13:20:36,156 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 13:20:36,156 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 13:20:36,156 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 13:20:36,156 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 13:20:36,157 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 13:20:36,157 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 13:20:36,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 13:20:36,157 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 13:20:36,158 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 13:20:36,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 13:20:36,158 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 13:20:36,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 13:20:36,158 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-12-07 13:20:36,158 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-12-07 13:20:36,159 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-12-07 13:20:36,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 13:20:36,159 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 13:20:36,159 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 13:20:36,159 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 13:20:36,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 13:20:36,160 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 13:20:36,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 13:20:36,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 13:20:36,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 13:20:36,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 13:20:36,161 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 13:20:36,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 13:20:36,161 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 13:20:36,161 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 13:20:36,161 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan 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 -> 97f817c294f65682bc18734ad52a0295ea6b342c [2019-12-07 13:20:36,260 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 13:20:36,270 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 13:20:36,273 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 13:20:36,274 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 13:20:36,275 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 13:20:36,275 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/../../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i [2019-12-07 13:20:36,320 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/data/e24afcf4e/ed0d9500d4f64a659c75756c902b1555/FLAG6b00ea047 [2019-12-07 13:20:36,762 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 13:20:36,763 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i [2019-12-07 13:20:36,771 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/data/e24afcf4e/ed0d9500d4f64a659c75756c902b1555/FLAG6b00ea047 [2019-12-07 13:20:36,780 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/data/e24afcf4e/ed0d9500d4f64a659c75756c902b1555 [2019-12-07 13:20:36,781 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 13:20:36,782 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 13:20:36,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 13:20:36,783 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 13:20:36,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 13:20:36,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:20:36" (1/1) ... [2019-12-07 13:20:36,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@733d7c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:20:36, skipping insertion in model container [2019-12-07 13:20:36,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:20:36" (1/1) ... [2019-12-07 13:20:36,794 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 13:20:36,823 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 13:20:37,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:20:37,035 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 13:20:37,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:20:37,092 INFO L208 MainTranslator]: Completed translation [2019-12-07 13:20:37,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:20:37 WrapperNode [2019-12-07 13:20:37,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 13:20:37,093 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 13:20:37,093 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 13:20:37,093 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 13:20:37,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:20:37" (1/1) ... [2019-12-07 13:20:37,107 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:20:37" (1/1) ... [2019-12-07 13:20:37,121 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 13:20:37,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 13:20:37,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 13:20:37,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 13:20:37,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:20:37" (1/1) ... [2019-12-07 13:20:37,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:20:37" (1/1) ... [2019-12-07 13:20:37,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:20:37" (1/1) ... [2019-12-07 13:20:37,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:20:37" (1/1) ... [2019-12-07 13:20:37,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:20:37" (1/1) ... [2019-12-07 13:20:37,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:20:37" (1/1) ... [2019-12-07 13:20:37,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:20:37" (1/1) ... [2019-12-07 13:20:37,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 13:20:37,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 13:20:37,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 13:20:37,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 13:20:37,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:20:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/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 [2019-12-07 13:20:37,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 13:20:37,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 13:20:37,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 13:20:37,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 13:20:37,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 13:20:37,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 13:20:37,408 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 13:20:37,408 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-12-07 13:20:37,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:20:37 BoogieIcfgContainer [2019-12-07 13:20:37,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 13:20:37,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 13:20:37,409 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 13:20:37,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 13:20:37,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:20:36" (1/3) ... [2019-12-07 13:20:37,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61201f99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:20:37, skipping insertion in model container [2019-12-07 13:20:37,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:20:37" (2/3) ... [2019-12-07 13:20:37,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61201f99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:20:37, skipping insertion in model container [2019-12-07 13:20:37,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:20:37" (3/3) ... [2019-12-07 13:20:37,413 INFO L109 eAbstractionObserver]: Analyzing ICFG openbsd_cstpcpy-alloca-1.i [2019-12-07 13:20:37,419 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 13:20:37,424 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2019-12-07 13:20:37,431 INFO L249 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2019-12-07 13:20:37,442 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 13:20:37,443 INFO L374 AbstractCegarLoop]: Hoare is false [2019-12-07 13:20:37,443 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 13:20:37,443 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 13:20:37,443 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 13:20:37,443 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 13:20:37,443 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 13:20:37,443 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 13:20:37,451 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-12-07 13:20:37,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-12-07 13:20:37,456 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:20:37,456 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-12-07 13:20:37,456 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 13:20:37,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:20:37,460 INFO L82 PathProgramCache]: Analyzing trace with hash 104379, now seen corresponding path program 1 times [2019-12-07 13:20:37,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:20:37,466 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904178895] [2019-12-07 13:20:37,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:20:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:20:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:20:37,555 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904178895] [2019-12-07 13:20:37,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:20:37,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-07 13:20:37,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417473588] [2019-12-07 13:20:37,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 13:20:37,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:20:37,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 13:20:37,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 13:20:37,570 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-12-07 13:20:37,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:20:37,601 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-12-07 13:20:37,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 13:20:37,603 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-12-07 13:20:37,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:20:37,610 INFO L225 Difference]: With dead ends: 21 [2019-12-07 13:20:37,610 INFO L226 Difference]: Without dead ends: 19 [2019-12-07 13:20:37,612 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 13:20:37,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-12-07 13:20:37,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-12-07 13:20:37,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-12-07 13:20:37,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-12-07 13:20:37,639 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 3 [2019-12-07 13:20:37,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:20:37,640 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-12-07 13:20:37,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 13:20:37,640 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-12-07 13:20:37,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 13:20:37,640 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:20:37,640 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 13:20:37,641 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 13:20:37,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:20:37,641 INFO L82 PathProgramCache]: Analyzing trace with hash 3236553, now seen corresponding path program 1 times [2019-12-07 13:20:37,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:20:37,641 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404196602] [2019-12-07 13:20:37,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:20:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:20:37,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:20:37,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404196602] [2019-12-07 13:20:37,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:20:37,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 13:20:37,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003532973] [2019-12-07 13:20:37,674 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 13:20:37,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:20:37,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 13:20:37,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 13:20:37,674 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 3 states. [2019-12-07 13:20:37,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:20:37,694 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2019-12-07 13:20:37,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 13:20:37,695 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-12-07 13:20:37,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:20:37,695 INFO L225 Difference]: With dead ends: 17 [2019-12-07 13:20:37,695 INFO L226 Difference]: Without dead ends: 17 [2019-12-07 13:20:37,696 INFO L630 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 [2019-12-07 13:20:37,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-12-07 13:20:37,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-12-07 13:20:37,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 13:20:37,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-12-07 13:20:37,698 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 4 [2019-12-07 13:20:37,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:20:37,698 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-12-07 13:20:37,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 13:20:37,698 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-12-07 13:20:37,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 13:20:37,699 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:20:37,699 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 13:20:37,699 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 13:20:37,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:20:37,699 INFO L82 PathProgramCache]: Analyzing trace with hash 3236554, now seen corresponding path program 1 times [2019-12-07 13:20:37,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:20:37,699 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389962808] [2019-12-07 13:20:37,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:20:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:20:37,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:20:37,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389962808] [2019-12-07 13:20:37,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:20:37,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 13:20:37,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598456520] [2019-12-07 13:20:37,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 13:20:37,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:20:37,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 13:20:37,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:20:37,749 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2019-12-07 13:20:37,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:20:37,795 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2019-12-07 13:20:37,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 13:20:37,796 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-12-07 13:20:37,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:20:37,796 INFO L225 Difference]: With dead ends: 31 [2019-12-07 13:20:37,796 INFO L226 Difference]: Without dead ends: 31 [2019-12-07 13:20:37,797 INFO L630 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 [2019-12-07 13:20:37,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-12-07 13:20:37,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 19. [2019-12-07 13:20:37,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-12-07 13:20:37,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-12-07 13:20:37,800 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 4 [2019-12-07 13:20:37,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:20:37,800 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-12-07 13:20:37,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 13:20:37,800 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-12-07 13:20:37,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 13:20:37,801 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:20:37,801 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 13:20:37,801 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 13:20:37,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:20:37,801 INFO L82 PathProgramCache]: Analyzing trace with hash 3238144, now seen corresponding path program 1 times [2019-12-07 13:20:37,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:20:37,801 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163611742] [2019-12-07 13:20:37,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:20:37,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:20:37,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:20:37,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163611742] [2019-12-07 13:20:37,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:20:37,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 13:20:37,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436696342] [2019-12-07 13:20:37,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 13:20:37,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:20:37,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 13:20:37,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:20:37,834 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2019-12-07 13:20:37,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:20:37,851 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2019-12-07 13:20:37,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 13:20:37,851 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-12-07 13:20:37,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:20:37,851 INFO L225 Difference]: With dead ends: 19 [2019-12-07 13:20:37,851 INFO L226 Difference]: Without dead ends: 19 [2019-12-07 13:20:37,852 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:20:37,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-12-07 13:20:37,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-12-07 13:20:37,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-12-07 13:20:37,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-12-07 13:20:37,854 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 4 [2019-12-07 13:20:37,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:20:37,855 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-12-07 13:20:37,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 13:20:37,855 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-12-07 13:20:37,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 13:20:37,855 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:20:37,855 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-12-07 13:20:37,855 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 13:20:37,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:20:37,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1184598634, now seen corresponding path program 1 times [2019-12-07 13:20:37,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:20:37,856 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978276114] [2019-12-07 13:20:37,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:20:37,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:20:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:20:37,908 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978276114] [2019-12-07 13:20:37,908 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606435248] [2019-12-07 13:20:37,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/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 [2019-12-07 13:20:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:20:37,946 INFO L264 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 13:20:37,949 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:20:37,998 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:20:37,999 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2019-12-07 13:20:37,999 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:20:38,015 INFO L614 ElimStorePlain]: treesize reduction 10, result has 67.7 percent of original size [2019-12-07 13:20:38,017 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:20:38,018 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:16, output treesize:12 [2019-12-07 13:20:38,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:20:38,044 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:20:38,068 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:20:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:20:38,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1943242125] [2019-12-07 13:20:38,107 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2019-12-07 13:20:38,107 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 13:20:38,110 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 13:20:38,114 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 13:20:38,115 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 13:20:38,467 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 13:20:38,583 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2019-12-07 13:20:38,825 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:20:38,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:20:38,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2019-12-07 13:20:38,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240888416] [2019-12-07 13:20:38,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 13:20:38,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:20:38,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 13:20:38,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-12-07 13:20:38,827 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 9 states. [2019-12-07 13:20:38,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:20:38,879 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2019-12-07 13:20:38,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 13:20:38,879 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2019-12-07 13:20:38,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:20:38,880 INFO L225 Difference]: With dead ends: 18 [2019-12-07 13:20:38,880 INFO L226 Difference]: Without dead ends: 18 [2019-12-07 13:20:38,880 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2019-12-07 13:20:38,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-12-07 13:20:38,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-12-07 13:20:38,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 13:20:38,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-12-07 13:20:38,882 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 6 [2019-12-07 13:20:38,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:20:38,882 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-12-07 13:20:38,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 13:20:38,883 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-12-07 13:20:38,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 13:20:38,883 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:20:38,883 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 13:20:39,084 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:20:39,085 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 13:20:39,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:20:39,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1184597044, now seen corresponding path program 1 times [2019-12-07 13:20:39,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:20:39,086 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265999728] [2019-12-07 13:20:39,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:20:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:20:39,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:20:39,174 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265999728] [2019-12-07 13:20:39,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:20:39,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 13:20:39,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364879212] [2019-12-07 13:20:39,176 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 13:20:39,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:20:39,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 13:20:39,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 13:20:39,177 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2019-12-07 13:20:39,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:20:39,248 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2019-12-07 13:20:39,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 13:20:39,248 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-12-07 13:20:39,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:20:39,249 INFO L225 Difference]: With dead ends: 17 [2019-12-07 13:20:39,249 INFO L226 Difference]: Without dead ends: 17 [2019-12-07 13:20:39,249 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-07 13:20:39,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-12-07 13:20:39,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-12-07 13:20:39,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-12-07 13:20:39,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-12-07 13:20:39,251 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 6 [2019-12-07 13:20:39,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:20:39,252 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-12-07 13:20:39,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 13:20:39,252 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-12-07 13:20:39,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 13:20:39,252 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:20:39,252 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:20:39,252 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 13:20:39,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:20:39,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1932198306, now seen corresponding path program 1 times [2019-12-07 13:20:39,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:20:39,253 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861541252] [2019-12-07 13:20:39,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:20:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:20:39,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:20:39,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861541252] [2019-12-07 13:20:39,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:20:39,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 13:20:39,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71343665] [2019-12-07 13:20:39,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 13:20:39,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:20:39,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 13:20:39,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:20:39,279 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 4 states. [2019-12-07 13:20:39,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:20:39,298 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2019-12-07 13:20:39,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 13:20:39,299 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-07 13:20:39,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:20:39,299 INFO L225 Difference]: With dead ends: 15 [2019-12-07 13:20:39,299 INFO L226 Difference]: Without dead ends: 15 [2019-12-07 13:20:39,299 INFO L630 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 [2019-12-07 13:20:39,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-12-07 13:20:39,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-12-07 13:20:39,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-12-07 13:20:39,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-12-07 13:20:39,301 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 7 [2019-12-07 13:20:39,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:20:39,301 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-12-07 13:20:39,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 13:20:39,301 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-12-07 13:20:39,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 13:20:39,301 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:20:39,301 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:20:39,301 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 13:20:39,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:20:39,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1932198307, now seen corresponding path program 1 times [2019-12-07 13:20:39,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:20:39,302 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058932074] [2019-12-07 13:20:39,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:20:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:20:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:20:39,347 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058932074] [2019-12-07 13:20:39,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:20:39,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 13:20:39,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268052274] [2019-12-07 13:20:39,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 13:20:39,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:20:39,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 13:20:39,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 13:20:39,348 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 6 states. [2019-12-07 13:20:39,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:20:39,393 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-12-07 13:20:39,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 13:20:39,393 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2019-12-07 13:20:39,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:20:39,394 INFO L225 Difference]: With dead ends: 24 [2019-12-07 13:20:39,394 INFO L226 Difference]: Without dead ends: 24 [2019-12-07 13:20:39,394 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-12-07 13:20:39,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-12-07 13:20:39,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2019-12-07 13:20:39,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-12-07 13:20:39,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-12-07 13:20:39,396 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 7 [2019-12-07 13:20:39,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:20:39,396 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-12-07 13:20:39,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 13:20:39,396 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-12-07 13:20:39,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 13:20:39,396 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:20:39,396 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:20:39,396 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 13:20:39,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:20:39,397 INFO L82 PathProgramCache]: Analyzing trace with hash -231394641, now seen corresponding path program 1 times [2019-12-07 13:20:39,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:20:39,397 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236036641] [2019-12-07 13:20:39,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:20:39,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:20:39,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 13:20:39,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236036641] [2019-12-07 13:20:39,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:20:39,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 13:20:39,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044417414] [2019-12-07 13:20:39,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 13:20:39,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:20:39,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 13:20:39,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 13:20:39,433 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2019-12-07 13:20:39,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:20:39,451 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2019-12-07 13:20:39,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 13:20:39,452 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-12-07 13:20:39,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:20:39,452 INFO L225 Difference]: With dead ends: 15 [2019-12-07 13:20:39,452 INFO L226 Difference]: Without dead ends: 15 [2019-12-07 13:20:39,452 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-07 13:20:39,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-12-07 13:20:39,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-12-07 13:20:39,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-12-07 13:20:39,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-12-07 13:20:39,454 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 8 [2019-12-07 13:20:39,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:20:39,454 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-12-07 13:20:39,454 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 13:20:39,454 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-12-07 13:20:39,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 13:20:39,454 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:20:39,454 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:20:39,454 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 13:20:39,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:20:39,455 INFO L82 PathProgramCache]: Analyzing trace with hash -231394640, now seen corresponding path program 1 times [2019-12-07 13:20:39,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:20:39,455 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139566737] [2019-12-07 13:20:39,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:20:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:20:39,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:20:39,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139566737] [2019-12-07 13:20:39,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760294144] [2019-12-07 13:20:39,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/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 [2019-12-07 13:20:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:20:39,531 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-07 13:20:39,532 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:20:39,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:20:39,605 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:20:39,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:20:39,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:20:39,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 11 [2019-12-07 13:20:39,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212102029] [2019-12-07 13:20:39,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 13:20:39,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:20:39,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 13:20:39,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-12-07 13:20:39,655 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2019-12-07 13:20:39,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:20:39,686 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2019-12-07 13:20:39,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 13:20:39,686 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-12-07 13:20:39,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:20:39,687 INFO L225 Difference]: With dead ends: 16 [2019-12-07 13:20:39,687 INFO L226 Difference]: Without dead ends: 16 [2019-12-07 13:20:39,687 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-12-07 13:20:39,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-12-07 13:20:39,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-12-07 13:20:39,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-12-07 13:20:39,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-12-07 13:20:39,688 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 8 [2019-12-07 13:20:39,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:20:39,689 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-12-07 13:20:39,689 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 13:20:39,689 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-12-07 13:20:39,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 13:20:39,689 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:20:39,689 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:20:39,889 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:20:39,890 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 13:20:39,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:20:39,891 INFO L82 PathProgramCache]: Analyzing trace with hash 968050739, now seen corresponding path program 1 times [2019-12-07 13:20:39,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:20:39,891 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906939719] [2019-12-07 13:20:39,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:20:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:20:40,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:20:40,082 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906939719] [2019-12-07 13:20:40,082 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309032433] [2019-12-07 13:20:40,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/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 [2019-12-07 13:20:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:20:40,112 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 13:20:40,112 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:20:40,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:20:40,181 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:20:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:20:40,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [981577314] [2019-12-07 13:20:40,279 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 13:20:40,279 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 13:20:40,279 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 13:20:40,279 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 13:20:40,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 13:20:40,717 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:20:40,969 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 13:20:41,208 WARN L192 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 61 [2019-12-07 13:20:42,253 WARN L192 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2019-12-07 13:20:42,802 WARN L192 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 91 [2019-12-07 13:20:42,972 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2019-12-07 13:20:42,973 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:20:42,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:20:42,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2019-12-07 13:20:42,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2887835] [2019-12-07 13:20:42,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-07 13:20:42,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:20:42,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-07 13:20:42,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2019-12-07 13:20:42,975 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 17 states. [2019-12-07 13:20:43,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:20:43,238 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2019-12-07 13:20:43,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 13:20:43,238 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 10 [2019-12-07 13:20:43,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:20:43,239 INFO L225 Difference]: With dead ends: 26 [2019-12-07 13:20:43,239 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 13:20:43,239 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2019-12-07 13:20:43,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 13:20:43,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2019-12-07 13:20:43,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 13:20:43,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-12-07 13:20:43,241 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 10 [2019-12-07 13:20:43,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:20:43,241 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-12-07 13:20:43,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-07 13:20:43,241 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-12-07 13:20:43,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 13:20:43,241 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:20:43,241 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:20:43,442 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:20:43,442 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 13:20:43,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:20:43,443 INFO L82 PathProgramCache]: Analyzing trace with hash -55217598, now seen corresponding path program 1 times [2019-12-07 13:20:43,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:20:43,443 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175040785] [2019-12-07 13:20:43,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:20:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:20:43,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 13:20:43,479 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175040785] [2019-12-07 13:20:43,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:20:43,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 13:20:43,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059763332] [2019-12-07 13:20:43,479 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 13:20:43,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:20:43,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 13:20:43,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:20:43,480 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 4 states. [2019-12-07 13:20:43,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:20:43,493 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-12-07 13:20:43,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 13:20:43,494 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-12-07 13:20:43,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:20:43,494 INFO L225 Difference]: With dead ends: 21 [2019-12-07 13:20:43,494 INFO L226 Difference]: Without dead ends: 15 [2019-12-07 13:20:43,494 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:20:43,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-12-07 13:20:43,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-12-07 13:20:43,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-12-07 13:20:43,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-12-07 13:20:43,496 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2019-12-07 13:20:43,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:20:43,496 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-12-07 13:20:43,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 13:20:43,496 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-12-07 13:20:43,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 13:20:43,496 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:20:43,496 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:20:43,497 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 13:20:43,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:20:43,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1481118207, now seen corresponding path program 2 times [2019-12-07 13:20:43,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:20:43,497 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109379151] [2019-12-07 13:20:43,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:20:43,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:20:43,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:20:43,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109379151] [2019-12-07 13:20:43,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654248589] [2019-12-07 13:20:43,540 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/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 [2019-12-07 13:20:43,570 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-07 13:20:43,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:20:43,571 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2019-12-07 13:20:43,572 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:20:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 13:20:43,641 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:20:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 13:20:43,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1903086479] [2019-12-07 13:20:43,730 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 13:20:43,730 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 13:20:43,730 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 13:20:43,731 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 13:20:43,731 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 13:20:44,034 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:20:44,261 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 13:20:44,479 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 60 [2019-12-07 13:20:44,751 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2019-12-07 13:20:45,440 WARN L192 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2019-12-07 13:20:46,201 WARN L192 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 91 [2019-12-07 13:20:46,316 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:20:46,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:20:46,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2019-12-07 13:20:46,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467744556] [2019-12-07 13:20:46,317 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-07 13:20:46,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:20:46,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-07 13:20:46,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2019-12-07 13:20:46,318 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 15 states. [2019-12-07 13:20:46,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:20:46,463 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2019-12-07 13:20:46,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 13:20:46,463 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2019-12-07 13:20:46,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:20:46,464 INFO L225 Difference]: With dead ends: 20 [2019-12-07 13:20:46,464 INFO L226 Difference]: Without dead ends: 20 [2019-12-07 13:20:46,464 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2019-12-07 13:20:46,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-12-07 13:20:46,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2019-12-07 13:20:46,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 13:20:46,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-12-07 13:20:46,466 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2019-12-07 13:20:46,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:20:46,466 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-12-07 13:20:46,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-07 13:20:46,466 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-12-07 13:20:46,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 13:20:46,466 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:20:46,466 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:20:46,667 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:20:46,667 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 13:20:46,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:20:46,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1329975852, now seen corresponding path program 1 times [2019-12-07 13:20:46,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:20:46,668 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358147926] [2019-12-07 13:20:46,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:20:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:20:46,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:20:46,760 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358147926] [2019-12-07 13:20:46,760 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912282881] [2019-12-07 13:20:46,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/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 [2019-12-07 13:20:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:20:46,793 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2019-12-07 13:20:46,794 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:20:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:20:46,926 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:20:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:20:47,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [512376890] [2019-12-07 13:20:47,025 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 13:20:47,025 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 13:20:47,026 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 13:20:47,026 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 13:20:47,026 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 13:20:47,227 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:20:47,555 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 13:20:47,978 WARN L192 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 94 [2019-12-07 13:20:48,655 WARN L192 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2019-12-07 13:20:49,207 WARN L192 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 91 [2019-12-07 13:20:49,340 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:20:49,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:20:49,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2019-12-07 13:20:49,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663664867] [2019-12-07 13:20:49,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-07 13:20:49,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:20:49,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 13:20:49,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2019-12-07 13:20:49,342 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 19 states. [2019-12-07 13:20:49,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:20:49,622 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2019-12-07 13:20:49,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 13:20:49,622 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 13 [2019-12-07 13:20:49,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:20:49,622 INFO L225 Difference]: With dead ends: 19 [2019-12-07 13:20:49,622 INFO L226 Difference]: Without dead ends: 19 [2019-12-07 13:20:49,623 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2019-12-07 13:20:49,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-12-07 13:20:49,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-12-07 13:20:49,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-12-07 13:20:49,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-12-07 13:20:49,624 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-12-07 13:20:49,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:20:49,624 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-12-07 13:20:49,624 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-07 13:20:49,624 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-12-07 13:20:49,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 13:20:49,625 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:20:49,625 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2019-12-07 13:20:49,825 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:20:49,826 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 13:20:49,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:20:49,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1793460823, now seen corresponding path program 3 times [2019-12-07 13:20:49,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:20:49,827 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863161946] [2019-12-07 13:20:49,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:20:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:20:50,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:20:50,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863161946] [2019-12-07 13:20:50,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812654303] [2019-12-07 13:20:50,050 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/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 [2019-12-07 13:20:50,080 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:20:50,081 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:20:50,081 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 39 conjunts are in the unsatisfiable core [2019-12-07 13:20:50,082 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:20:50,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:20:50,198 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:20:50,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:20:50,373 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1249306241] [2019-12-07 13:20:50,374 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 13:20:50,374 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 13:20:50,374 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 13:20:50,374 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 13:20:50,374 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 13:20:50,567 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:20:50,574 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:20:50,579 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:20:50,806 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-12-07 13:20:51,044 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:20:51,323 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:20:51,514 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:20:51,696 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:20:51,874 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:20:51,885 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:20:51,896 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:20:52,013 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-12-07 13:20:52,017 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-12-07 13:20:52,043 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-12-07 13:20:52,054 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-12-07 13:20:52,153 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 13:20:52,575 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 82 [2019-12-07 13:20:52,878 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 59 [2019-12-07 13:20:53,029 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:20:53,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:20:53,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 23 [2019-12-07 13:20:53,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105638741] [2019-12-07 13:20:53,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-07 13:20:53,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:20:53,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-07 13:20:53,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2019-12-07 13:20:53,030 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 23 states. [2019-12-07 13:20:53,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:20:53,415 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2019-12-07 13:20:53,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 13:20:53,416 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 15 [2019-12-07 13:20:53,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:20:53,416 INFO L225 Difference]: With dead ends: 28 [2019-12-07 13:20:53,416 INFO L226 Difference]: Without dead ends: 21 [2019-12-07 13:20:53,416 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2019-12-07 13:20:53,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-12-07 13:20:53,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-12-07 13:20:53,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 13:20:53,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-12-07 13:20:53,418 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2019-12-07 13:20:53,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:20:53,418 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-12-07 13:20:53,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-07 13:20:53,418 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-12-07 13:20:53,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-07 13:20:53,419 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:20:53,419 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2019-12-07 13:20:53,619 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:20:53,620 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 13:20:53,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:20:53,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1560051701, now seen corresponding path program 4 times [2019-12-07 13:20:53,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:20:53,621 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587630375] [2019-12-07 13:20:53,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:20:53,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:20:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:20:53,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587630375] [2019-12-07 13:20:53,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168537647] [2019-12-07 13:20:53,697 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/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 [2019-12-07 13:20:53,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:20:53,729 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-07 13:20:53,730 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:20:53,775 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:20:53,775 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:20:53,851 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:20:53,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1312849526] [2019-12-07 13:20:53,852 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 13:20:53,852 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 13:20:53,852 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 13:20:53,852 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 13:20:53,852 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 13:20:54,089 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:20:54,328 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 13:20:54,510 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 61 [2019-12-07 13:20:55,128 WARN L192 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2019-12-07 13:20:55,515 WARN L192 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 91 [2019-12-07 13:20:55,663 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2019-12-07 13:20:55,664 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:20:55,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:20:55,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2019-12-07 13:20:55,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884756936] [2019-12-07 13:20:55,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-07 13:20:55,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:20:55,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-07 13:20:55,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2019-12-07 13:20:55,665 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 20 states. [2019-12-07 13:20:56,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:20:56,062 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2019-12-07 13:20:56,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 13:20:56,062 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 17 [2019-12-07 13:20:56,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:20:56,063 INFO L225 Difference]: With dead ends: 25 [2019-12-07 13:20:56,063 INFO L226 Difference]: Without dead ends: 25 [2019-12-07 13:20:56,064 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=195, Invalid=927, Unknown=0, NotChecked=0, Total=1122 [2019-12-07 13:20:56,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-12-07 13:20:56,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2019-12-07 13:20:56,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 13:20:56,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-12-07 13:20:56,067 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2019-12-07 13:20:56,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:20:56,067 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-12-07 13:20:56,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-07 13:20:56,067 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-12-07 13:20:56,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 13:20:56,068 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:20:56,068 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2019-12-07 13:20:56,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:20:56,269 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 13:20:56,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:20:56,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1116962488, now seen corresponding path program 2 times [2019-12-07 13:20:56,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:20:56,270 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041206406] [2019-12-07 13:20:56,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:20:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:20:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:20:56,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041206406] [2019-12-07 13:20:56,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333931267] [2019-12-07 13:20:56,350 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/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 [2019-12-07 13:20:56,383 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 13:20:56,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:20:56,384 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-07 13:20:56,385 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:20:56,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-07 13:20:56,504 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:20:56,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-07 13:20:56,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1890350534] [2019-12-07 13:20:56,704 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 13:20:56,704 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 13:20:56,705 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 13:20:56,705 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 13:20:56,705 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 13:20:57,068 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:20:57,279 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 13:20:57,684 WARN L192 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 94 [2019-12-07 13:20:58,380 WARN L192 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2019-12-07 13:20:58,794 WARN L192 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 91 [2019-12-07 13:20:58,928 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:20:58,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:20:58,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2019-12-07 13:20:58,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106198247] [2019-12-07 13:20:58,929 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-07 13:20:58,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:20:58,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-07 13:20:58,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2019-12-07 13:20:58,930 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 21 states. [2019-12-07 13:20:59,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:20:59,795 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2019-12-07 13:20:59,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 13:20:59,796 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 18 [2019-12-07 13:20:59,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:20:59,797 INFO L225 Difference]: With dead ends: 35 [2019-12-07 13:20:59,797 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 13:20:59,798 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=336, Invalid=1470, Unknown=0, NotChecked=0, Total=1806 [2019-12-07 13:20:59,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 13:20:59,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2019-12-07 13:20:59,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-07 13:20:59,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-12-07 13:20:59,802 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 18 [2019-12-07 13:20:59,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:20:59,802 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-12-07 13:20:59,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-07 13:20:59,803 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-12-07 13:20:59,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-07 13:20:59,803 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:20:59,803 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2019-12-07 13:21:00,004 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:00,004 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 13:21:00,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:00,005 INFO L82 PathProgramCache]: Analyzing trace with hash 340873419, now seen corresponding path program 5 times [2019-12-07 13:21:00,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:21:00,005 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405548106] [2019-12-07 13:21:00,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:00,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405548106] [2019-12-07 13:21:00,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113877858] [2019-12-07 13:21:00,165 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/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 [2019-12-07 13:21:00,202 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-07 13:21:00,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:00,203 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 43 conjunts are in the unsatisfiable core [2019-12-07 13:21:00,204 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:00,360 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:21:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:00,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [415713888] [2019-12-07 13:21:00,488 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 13:21:00,488 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 13:21:00,488 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 13:21:00,488 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 13:21:00,488 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 13:21:00,792 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:21:01,014 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 13:21:01,245 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 60 [2019-12-07 13:21:01,942 WARN L192 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2019-12-07 13:21:02,614 WARN L192 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 91 [2019-12-07 13:21:02,757 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:21:02,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:21:02,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 23 [2019-12-07 13:21:02,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776677630] [2019-12-07 13:21:02,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-07 13:21:02,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:21:02,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-07 13:21:02,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2019-12-07 13:21:02,758 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 23 states. [2019-12-07 13:21:03,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:03,069 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2019-12-07 13:21:03,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 13:21:03,069 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 20 [2019-12-07 13:21:03,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:03,071 INFO L225 Difference]: With dead ends: 45 [2019-12-07 13:21:03,071 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 13:21:03,071 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2019-12-07 13:21:03,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 13:21:03,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-12-07 13:21:03,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-07 13:21:03,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-12-07 13:21:03,074 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 20 [2019-12-07 13:21:03,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:03,074 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-12-07 13:21:03,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-07 13:21:03,074 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-12-07 13:21:03,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 13:21:03,074 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:03,074 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2019-12-07 13:21:03,275 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:03,275 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 13:21:03,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:03,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1081953175, now seen corresponding path program 6 times [2019-12-07 13:21:03,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:21:03,276 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300838115] [2019-12-07 13:21:03,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:03,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:03,359 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:03,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300838115] [2019-12-07 13:21:03,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978785699] [2019-12-07 13:21:03,359 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/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 [2019-12-07 13:21:03,392 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:21:03,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:03,392 INFO L264 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 25 conjunts are in the unsatisfiable core [2019-12-07 13:21:03,394 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:03,449 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:03,450 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:21:03,556 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:03,557 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [854889438] [2019-12-07 13:21:03,557 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 13:21:03,557 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 13:21:03,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 13:21:03,558 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 13:21:03,558 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 13:21:03,755 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:21:04,060 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 13:21:04,247 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 61 [2019-12-07 13:21:04,916 WARN L192 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2019-12-07 13:21:05,320 WARN L192 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 91 [2019-12-07 13:21:05,444 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:21:05,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:21:05,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 23 [2019-12-07 13:21:05,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129227503] [2019-12-07 13:21:05,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-07 13:21:05,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:21:05,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-07 13:21:05,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2019-12-07 13:21:05,445 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 24 states. [2019-12-07 13:21:05,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:05,661 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2019-12-07 13:21:05,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 13:21:05,661 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 22 [2019-12-07 13:21:05,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:05,661 INFO L225 Difference]: With dead ends: 34 [2019-12-07 13:21:05,662 INFO L226 Difference]: Without dead ends: 34 [2019-12-07 13:21:05,662 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=250, Invalid=1232, Unknown=0, NotChecked=0, Total=1482 [2019-12-07 13:21:05,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-07 13:21:05,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-12-07 13:21:05,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-07 13:21:05,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2019-12-07 13:21:05,664 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 22 [2019-12-07 13:21:05,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:05,664 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2019-12-07 13:21:05,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-07 13:21:05,665 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2019-12-07 13:21:05,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-07 13:21:05,665 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:05,665 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2019-12-07 13:21:05,865 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:05,866 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 13:21:05,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:05,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1262532161, now seen corresponding path program 7 times [2019-12-07 13:21:05,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:21:05,867 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212805180] [2019-12-07 13:21:05,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:05,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:06,156 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:06,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212805180] [2019-12-07 13:21:06,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925119972] [2019-12-07 13:21:06,156 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/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 [2019-12-07 13:21:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:06,198 INFO L264 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 53 conjunts are in the unsatisfiable core [2019-12-07 13:21:06,200 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:06,457 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:21:06,981 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:06,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1078074094] [2019-12-07 13:21:06,982 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 13:21:06,982 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 13:21:06,982 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 13:21:06,983 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 13:21:06,983 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 13:21:07,230 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:21:07,553 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 13:21:08,072 WARN L192 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 60 [2019-12-07 13:21:09,026 WARN L192 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2019-12-07 13:21:09,462 WARN L192 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 91 [2019-12-07 13:21:09,619 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:21:09,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:21:09,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 36 [2019-12-07 13:21:09,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383402532] [2019-12-07 13:21:09,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-12-07 13:21:09,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:21:09,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-12-07 13:21:09,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1751, Unknown=0, NotChecked=0, Total=1892 [2019-12-07 13:21:09,620 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 36 states. [2019-12-07 13:21:10,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:10,258 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2019-12-07 13:21:10,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 13:21:10,258 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 25 [2019-12-07 13:21:10,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:10,258 INFO L225 Difference]: With dead ends: 50 [2019-12-07 13:21:10,259 INFO L226 Difference]: Without dead ends: 37 [2019-12-07 13:21:10,259 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=272, Invalid=2808, Unknown=0, NotChecked=0, Total=3080 [2019-12-07 13:21:10,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-07 13:21:10,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-12-07 13:21:10,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-07 13:21:10,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2019-12-07 13:21:10,262 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 25 [2019-12-07 13:21:10,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:10,262 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2019-12-07 13:21:10,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-12-07 13:21:10,262 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2019-12-07 13:21:10,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-07 13:21:10,263 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:10,263 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2019-12-07 13:21:10,463 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:10,464 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 13:21:10,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:10,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1662791283, now seen corresponding path program 8 times [2019-12-07 13:21:10,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:21:10,464 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425169603] [2019-12-07 13:21:10,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:10,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:10,565 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:10,565 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425169603] [2019-12-07 13:21:10,565 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720930180] [2019-12-07 13:21:10,566 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/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 [2019-12-07 13:21:10,616 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-07 13:21:10,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:10,618 INFO L264 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 67 conjunts are in the unsatisfiable core [2019-12-07 13:21:10,620 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:10,815 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-12-07 13:21:10,815 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:21:41,845 WARN L192 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 329 DAG size of output: 53 [2019-12-07 13:21:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-12-07 13:21:41,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [262239569] [2019-12-07 13:21:41,964 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 13:21:41,964 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 13:21:41,965 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 13:21:41,965 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 13:21:41,965 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 13:21:42,220 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:21:42,450 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 13:21:42,674 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 61 [2019-12-07 13:21:43,176 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2019-12-07 13:21:43,941 WARN L192 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2019-12-07 13:21:44,784 WARN L192 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 91 [2019-12-07 13:21:45,081 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2019-12-07 13:21:45,082 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:21:45,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:21:45,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 11] total 30 [2019-12-07 13:21:45,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028617193] [2019-12-07 13:21:45,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-12-07 13:21:45,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:21:45,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-12-07 13:21:45,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1311, Unknown=0, NotChecked=0, Total=1482 [2019-12-07 13:21:45,084 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 31 states. [2019-12-07 13:21:46,386 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2019-12-07 13:21:47,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:47,104 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-12-07 13:21:47,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-07 13:21:47,104 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 27 [2019-12-07 13:21:47,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:47,104 INFO L225 Difference]: With dead ends: 45 [2019-12-07 13:21:47,104 INFO L226 Difference]: Without dead ends: 45 [2019-12-07 13:21:47,105 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=569, Invalid=2737, Unknown=0, NotChecked=0, Total=3306 [2019-12-07 13:21:47,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-12-07 13:21:47,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2019-12-07 13:21:47,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-12-07 13:21:47,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2019-12-07 13:21:47,107 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 27 [2019-12-07 13:21:47,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:47,107 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2019-12-07 13:21:47,107 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-12-07 13:21:47,107 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2019-12-07 13:21:47,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-07 13:21:47,108 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:47,108 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 1, 1, 1, 1, 1] [2019-12-07 13:21:47,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:47,309 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 13:21:47,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:47,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1422785056, now seen corresponding path program 3 times [2019-12-07 13:21:47,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:21:47,310 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401341872] [2019-12-07 13:21:47,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-12-07 13:21:47,425 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401341872] [2019-12-07 13:21:47,425 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445431149] [2019-12-07 13:21:47,425 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/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 [2019-12-07 13:21:47,465 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:21:47,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:47,466 INFO L264 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2019-12-07 13:21:47,468 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 56 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 13:21:47,661 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:21:47,884 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 51 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 13:21:47,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1070294561] [2019-12-07 13:21:47,885 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 13:21:47,885 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 13:21:47,885 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 13:21:47,886 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 13:21:47,886 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 13:21:48,059 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:21:48,066 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:21:48,090 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:21:48,289 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-12-07 13:21:48,315 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:21:48,889 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:21:48,902 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:21:48,915 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:21:48,926 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:21:48,937 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:21:49,001 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:21:49,396 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-12-07 13:21:49,400 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-12-07 13:21:49,421 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-12-07 13:21:49,431 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-12-07 13:21:49,516 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 13:21:49,970 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 82 [2019-12-07 13:21:50,278 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 59 [2019-12-07 13:21:50,415 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:21:50,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:21:50,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 37 [2019-12-07 13:21:50,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936843793] [2019-12-07 13:21:50,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-12-07 13:21:50,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:21:50,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-12-07 13:21:50,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1592, Unknown=0, NotChecked=0, Total=1806 [2019-12-07 13:21:50,416 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 37 states. [2019-12-07 13:21:51,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:51,814 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-12-07 13:21:51,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-07 13:21:51,815 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 34 [2019-12-07 13:21:51,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:51,816 INFO L225 Difference]: With dead ends: 60 [2019-12-07 13:21:51,816 INFO L226 Difference]: Without dead ends: 43 [2019-12-07 13:21:51,819 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=560, Invalid=3600, Unknown=0, NotChecked=0, Total=4160 [2019-12-07 13:21:51,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-12-07 13:21:51,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-12-07 13:21:51,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-07 13:21:51,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-12-07 13:21:51,823 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 34 [2019-12-07 13:21:51,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:51,823 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-12-07 13:21:51,824 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-12-07 13:21:51,824 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-12-07 13:21:51,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-12-07 13:21:51,825 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:51,825 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 1, 1, 1, 1, 1] [2019-12-07 13:21:52,026 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:52,026 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 13:21:52,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:52,027 INFO L82 PathProgramCache]: Analyzing trace with hash -2122646489, now seen corresponding path program 9 times [2019-12-07 13:21:52,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:21:52,027 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592105660] [2019-12-07 13:21:52,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 73 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:52,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592105660] [2019-12-07 13:21:52,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219502839] [2019-12-07 13:21:52,201 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/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 [2019-12-07 13:21:52,244 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:21:52,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:52,246 INFO L264 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 35 conjunts are in the unsatisfiable core [2019-12-07 13:21:52,247 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:52,525 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 89 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 13:21:52,525 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:21:52,749 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 83 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 13:21:52,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [591427170] [2019-12-07 13:21:52,750 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 13:21:52,750 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 13:21:52,750 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 13:21:52,750 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 13:21:52,750 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 13:21:53,085 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:21:53,242 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 13:21:53,460 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 61 [2019-12-07 13:21:54,215 WARN L192 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2019-12-07 13:21:54,748 WARN L192 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 91 [2019-12-07 13:21:54,905 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:21:54,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:21:54,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 42 [2019-12-07 13:21:54,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152358176] [2019-12-07 13:21:54,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-12-07 13:21:54,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:21:54,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-12-07 13:21:54,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=2086, Unknown=0, NotChecked=0, Total=2450 [2019-12-07 13:21:54,907 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 42 states. [2019-12-07 13:21:55,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:55,219 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2019-12-07 13:21:55,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 13:21:55,219 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2019-12-07 13:21:55,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:55,219 INFO L225 Difference]: With dead ends: 65 [2019-12-07 13:21:55,219 INFO L226 Difference]: Without dead ends: 45 [2019-12-07 13:21:55,220 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 84 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=554, Invalid=2752, Unknown=0, NotChecked=0, Total=3306 [2019-12-07 13:21:55,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-12-07 13:21:55,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-12-07 13:21:55,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-07 13:21:55,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-12-07 13:21:55,222 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2019-12-07 13:21:55,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:55,222 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-12-07 13:21:55,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-12-07 13:21:55,222 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-12-07 13:21:55,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-12-07 13:21:55,223 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:55,223 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2019-12-07 13:21:55,423 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:55,423 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 13:21:55,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:55,424 INFO L82 PathProgramCache]: Analyzing trace with hash -117442341, now seen corresponding path program 10 times [2019-12-07 13:21:55,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:21:55,424 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401157485] [2019-12-07 13:21:55,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:55,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:55,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401157485] [2019-12-07 13:21:55,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055183912] [2019-12-07 13:21:55,602 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/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 [2019-12-07 13:21:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:55,648 INFO L264 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 39 conjunts are in the unsatisfiable core [2019-12-07 13:21:55,650 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 92 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:55,964 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:21:56,245 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 85 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:56,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1755959766] [2019-12-07 13:21:56,246 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 13:21:56,246 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 13:21:56,246 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 13:21:56,246 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 13:21:56,246 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 13:21:56,425 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:21:56,719 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 13:21:56,946 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 61 [2019-12-07 13:21:57,807 WARN L192 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2019-12-07 13:21:58,296 WARN L192 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 91 [2019-12-07 13:21:58,433 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:21:58,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:21:58,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 46 [2019-12-07 13:21:58,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328505965] [2019-12-07 13:21:58,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-12-07 13:21:58,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:21:58,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-12-07 13:21:58,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=2426, Unknown=0, NotChecked=0, Total=2862 [2019-12-07 13:21:58,435 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 46 states. [2019-12-07 13:21:58,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:58,737 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2019-12-07 13:21:58,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-07 13:21:58,737 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 43 [2019-12-07 13:21:58,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:58,738 INFO L225 Difference]: With dead ends: 70 [2019-12-07 13:21:58,738 INFO L226 Difference]: Without dead ends: 47 [2019-12-07 13:21:58,739 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=672, Invalid=3234, Unknown=0, NotChecked=0, Total=3906 [2019-12-07 13:21:58,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-12-07 13:21:58,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-12-07 13:21:58,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-12-07 13:21:58,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2019-12-07 13:21:58,740 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2019-12-07 13:21:58,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:58,741 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2019-12-07 13:21:58,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-12-07 13:21:58,741 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2019-12-07 13:21:58,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-07 13:21:58,741 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:58,741 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1] [2019-12-07 13:21:58,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:58,942 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 13:21:58,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:58,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1556572017, now seen corresponding path program 11 times [2019-12-07 13:21:58,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:21:58,943 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530853725] [2019-12-07 13:21:58,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 8 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:59,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530853725] [2019-12-07 13:21:59,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028343871] [2019-12-07 13:21:59,313 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/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 [2019-12-07 13:21:59,491 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-12-07 13:21:59,491 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:59,493 INFO L264 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 94 conjunts are in the unsatisfiable core [2019-12-07 13:21:59,495 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:59,788 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 8 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:59,788 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:22:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 8 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:22:00,775 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1132265475] [2019-12-07 13:22:00,777 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 13:22:00,777 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 13:22:00,777 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 13:22:00,777 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 13:22:00,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 13:22:01,349 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:22:01,514 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 13:22:01,795 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 61 [2019-12-07 13:22:02,658 WARN L192 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2019-12-07 13:22:03,131 WARN L192 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 91 [2019-12-07 13:22:03,301 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:22:03,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:22:03,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 23] total 43 [2019-12-07 13:22:03,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884541230] [2019-12-07 13:22:03,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-12-07 13:22:03,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:22:03,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-12-07 13:22:03,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2406, Unknown=0, NotChecked=0, Total=2550 [2019-12-07 13:22:03,303 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 43 states. [2019-12-07 13:22:04,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:04,439 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2019-12-07 13:22:04,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-07 13:22:04,440 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 45 [2019-12-07 13:22:04,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:04,440 INFO L225 Difference]: With dead ends: 74 [2019-12-07 13:22:04,440 INFO L226 Difference]: Without dead ends: 49 [2019-12-07 13:22:04,441 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 102 SyntacticMatches, 12 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=296, Invalid=4260, Unknown=0, NotChecked=0, Total=4556 [2019-12-07 13:22:04,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-12-07 13:22:04,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-12-07 13:22:04,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-12-07 13:22:04,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2019-12-07 13:22:04,443 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2019-12-07 13:22:04,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:04,443 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2019-12-07 13:22:04,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-12-07 13:22:04,443 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2019-12-07 13:22:04,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-12-07 13:22:04,444 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:04,444 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1] [2019-12-07 13:22:04,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:22:04,644 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 13:22:04,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:04,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1580721341, now seen corresponding path program 12 times [2019-12-07 13:22:04,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:22:04,645 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271232248] [2019-12-07 13:22:04,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:04,868 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 66 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:22:04,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271232248] [2019-12-07 13:22:04,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741035758] [2019-12-07 13:22:04,868 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:22:04,912 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:22:04,912 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:22:04,913 INFO L264 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 50 conjunts are in the unsatisfiable core [2019-12-07 13:22:04,915 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:22:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 72 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:22:05,078 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:22:05,406 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 72 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:22:05,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1407568539] [2019-12-07 13:22:05,407 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 13:22:05,407 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 13:22:05,407 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 13:22:05,407 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 13:22:05,407 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 13:22:05,765 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:22:05,948 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 13:22:06,183 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 61 [2019-12-07 13:22:07,172 WARN L192 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2019-12-07 13:22:07,777 WARN L192 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 91 [2019-12-07 13:22:07,956 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:22:07,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:22:07,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 43 [2019-12-07 13:22:07,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455886833] [2019-12-07 13:22:07,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-12-07 13:22:07,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:22:07,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-12-07 13:22:07,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=2345, Unknown=0, NotChecked=0, Total=2652 [2019-12-07 13:22:07,958 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 44 states. [2019-12-07 13:22:08,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:08,771 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2019-12-07 13:22:08,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-07 13:22:08,772 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2019-12-07 13:22:08,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:08,773 INFO L225 Difference]: With dead ends: 53 [2019-12-07 13:22:08,773 INFO L226 Difference]: Without dead ends: 53 [2019-12-07 13:22:08,776 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 100 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=660, Invalid=3372, Unknown=0, NotChecked=0, Total=4032 [2019-12-07 13:22:08,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-07 13:22:08,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2019-12-07 13:22:08,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-12-07 13:22:08,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2019-12-07 13:22:08,779 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 47 [2019-12-07 13:22:08,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:08,780 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2019-12-07 13:22:08,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-12-07 13:22:08,780 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2019-12-07 13:22:08,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-12-07 13:22:08,781 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:08,781 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1] [2019-12-07 13:22:08,981 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:22:08,982 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 13:22:08,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:08,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1248048493, now seen corresponding path program 13 times [2019-12-07 13:22:08,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:22:08,983 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603134847] [2019-12-07 13:22:08,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:09,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:09,451 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 9 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:22:09,451 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603134847] [2019-12-07 13:22:09,451 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20659033] [2019-12-07 13:22:09,452 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:22:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:09,526 INFO L264 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 98 conjunts are in the unsatisfiable core [2019-12-07 13:22:09,528 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:22:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 9 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:22:10,255 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:22:12,783 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 9 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:22:12,783 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [35872296] [2019-12-07 13:22:12,783 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 13:22:12,783 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 13:22:12,784 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 13:22:12,784 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 13:22:12,784 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 13:22:13,003 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:22:13,010 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:22:13,016 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:22:13,209 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-12-07 13:22:13,278 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:22:13,293 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:22:13,945 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:22:14,027 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:22:14,042 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:22:14,135 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:22:14,244 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:22:14,362 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-12-07 13:22:14,366 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-12-07 13:22:14,384 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-12-07 13:22:14,396 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-12-07 13:22:14,490 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 13:22:15,156 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 82 [2019-12-07 13:22:15,601 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 59 [2019-12-07 13:22:15,781 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:22:15,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:22:15,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 26] total 61 [2019-12-07 13:22:15,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367396988] [2019-12-07 13:22:15,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-12-07 13:22:15,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:22:15,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-12-07 13:22:15,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4222, Unknown=0, NotChecked=0, Total=4422 [2019-12-07 13:22:15,783 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 61 states. [2019-12-07 13:22:17,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:17,563 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2019-12-07 13:22:17,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-07 13:22:17,563 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 50 [2019-12-07 13:22:17,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:17,564 INFO L225 Difference]: With dead ends: 82 [2019-12-07 13:22:17,564 INFO L226 Difference]: Without dead ends: 54 [2019-12-07 13:22:17,564 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 106 SyntacticMatches, 10 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=437, Invalid=7395, Unknown=0, NotChecked=0, Total=7832 [2019-12-07 13:22:17,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-12-07 13:22:17,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-12-07 13:22:17,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-07 13:22:17,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-12-07 13:22:17,566 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2019-12-07 13:22:17,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:17,566 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-12-07 13:22:17,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-12-07 13:22:17,566 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-12-07 13:22:17,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-07 13:22:17,566 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:17,566 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1] [2019-12-07 13:22:17,767 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:22:17,767 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 13:22:17,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:17,768 INFO L82 PathProgramCache]: Analyzing trace with hash -2120853409, now seen corresponding path program 14 times [2019-12-07 13:22:17,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:22:17,768 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915502787] [2019-12-07 13:22:17,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:18,025 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 83 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:22:18,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915502787] [2019-12-07 13:22:18,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758527668] [2019-12-07 13:22:18,026 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:22:18,624 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-12-07 13:22:18,625 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:22:18,628 INFO L264 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 70 conjunts are in the unsatisfiable core [2019-12-07 13:22:18,629 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:22:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2019-12-07 13:22:18,816 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:22:19,425 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2019-12-07 13:22:19,425 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1041996210] [2019-12-07 13:22:19,426 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 13:22:19,426 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 13:22:19,426 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 13:22:19,426 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 13:22:19,426 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 13:22:19,634 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:22:19,641 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:22:19,647 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:22:19,882 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-12-07 13:22:19,961 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:22:20,449 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:22:20,581 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:22:20,598 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:22:20,612 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:22:20,815 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:22:20,895 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:22:21,071 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-12-07 13:22:21,075 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-12-07 13:22:21,095 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-12-07 13:22:21,104 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-12-07 13:22:21,187 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 13:22:21,664 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 82 [2019-12-07 13:22:22,072 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 59 [2019-12-07 13:22:22,258 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2019-12-07 13:22:22,259 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:22:22,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:22:22,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 6, 6] total 32 [2019-12-07 13:22:22,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751961882] [2019-12-07 13:22:22,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-12-07 13:22:22,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:22:22,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-12-07 13:22:22,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1312, Unknown=0, NotChecked=0, Total=1482 [2019-12-07 13:22:22,261 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 33 states. [2019-12-07 13:22:23,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:23,325 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-12-07 13:22:23,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-07 13:22:23,326 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 52 [2019-12-07 13:22:23,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:23,326 INFO L225 Difference]: With dead ends: 54 [2019-12-07 13:22:23,326 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 13:22:23,326 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 7 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=692, Invalid=2848, Unknown=0, NotChecked=0, Total=3540 [2019-12-07 13:22:23,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 13:22:23,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 13:22:23,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 13:22:23,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 13:22:23,327 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 52 [2019-12-07 13:22:23,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:23,327 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 13:22:23,327 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-12-07 13:22:23,327 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 13:22:23,327 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 13:22:23,527 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:22:23,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 01:22:23 BoogieIcfgContainer [2019-12-07 13:22:23,539 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 13:22:23,540 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 13:22:23,540 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 13:22:23,541 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 13:22:23,542 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:20:37" (3/4) ... [2019-12-07 13:22:23,545 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 13:22:23,552 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2019-12-07 13:22:23,552 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-12-07 13:22:23,552 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 13:22:23,582 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c8fefdea-d6da-4647-8e73-786d48400b3e/bin/utaipan/witness.graphml [2019-12-07 13:22:23,582 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 13:22:23,583 INFO L168 Benchmark]: Toolchain (without parser) took 106801.15 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 219.7 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -110.1 MB). Peak memory consumption was 109.6 MB. Max. memory is 11.5 GB. [2019-12-07 13:22:23,583 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:22:23,584 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.50 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 82.3 MB). Free memory was 940.9 MB in the beginning and 1.1 GB in the end (delta: -125.5 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. [2019-12-07 13:22:23,584 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.87 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:22:23,584 INFO L168 Benchmark]: Boogie Preprocessor took 18.06 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 13:22:23,584 INFO L168 Benchmark]: RCFGBuilder took 268.96 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 11.5 GB. [2019-12-07 13:22:23,584 INFO L168 Benchmark]: TraceAbstraction took 106130.17 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: -35.4 MB). Peak memory consumption was 102.0 MB. Max. memory is 11.5 GB. [2019-12-07 13:22:23,585 INFO L168 Benchmark]: Witness Printer took 42.10 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 11.5 GB. [2019-12-07 13:22:23,586 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 309.50 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 82.3 MB). Free memory was 940.9 MB in the beginning and 1.1 GB in the end (delta: -125.5 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 28.87 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.06 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 268.96 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 106130.17 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: -35.4 MB). Peak memory consumption was 102.0 MB. Max. memory is 11.5 GB. * Witness Printer took 42.10 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 515]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 533]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 515]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 533]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 515]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 515]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 535]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 535]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 9 error locations. Result: SAFE, OverallTime: 106.0s, OverallIterations: 28, TraceHistogramMax: 10, AutomataDifference: 12.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 149 SDtfs, 1705 SDslu, 437 SDs, 0 SdLazy, 6991 SolverSat, 1154 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1973 GetRequests, 1010 SyntacticMatches, 80 SemanticMatches, 883 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 11710 ImplicationChecksByTransitivity, 48.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 28 MinimizatonAttempts, 50 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 44.5s InterpolantComputationTime, 1064 NumberOfCodeBlocks, 1025 NumberOfCodeBlocksAsserted, 74 NumberOfCheckSat, 1503 ConstructedInterpolants, 60 QuantifiedInterpolants, 652569 SizeOfPredicates, 399 NumberOfNonLiveVariables, 3449 ConjunctsInSsa, 806 ConjunctsInUnsatCore, 66 InterpolantComputations, 10 PerfectInterpolantSequences, 1569/3857 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...