./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/getNumbers4-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/getNumbers4-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/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 b8a667539b0a7850f9a7aa38ebbe1ead0e2c55d4 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 06:21:14,284 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 06:21:14,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 06:21:14,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 06:21:14,316 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 06:21:14,317 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 06:21:14,319 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 06:21:14,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 06:21:14,323 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 06:21:14,324 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 06:21:14,325 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 06:21:14,326 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 06:21:14,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 06:21:14,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 06:21:14,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 06:21:14,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 06:21:14,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 06:21:14,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 06:21:14,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 06:21:14,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 06:21:14,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 06:21:14,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 06:21:14,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 06:21:14,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 06:21:14,342 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 06:21:14,342 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 06:21:14,342 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 06:21:14,343 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 06:21:14,343 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 06:21:14,344 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 06:21:14,345 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 06:21:14,345 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 06:21:14,346 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 06:21:14,347 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 06:21:14,347 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 06:21:14,348 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 06:21:14,348 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 06:21:14,348 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 06:21:14,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 06:21:14,349 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 06:21:14,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 06:21:14,351 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 06:21:14,374 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 06:21:14,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 06:21:14,375 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 06:21:14,375 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 06:21:14,375 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 06:21:14,376 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 06:21:14,376 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 06:21:14,376 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 06:21:14,376 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 06:21:14,380 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 06:21:14,380 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 06:21:14,381 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 06:21:14,381 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 06:21:14,381 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 06:21:14,381 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 06:21:14,382 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 06:21:14,382 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 06:21:14,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 06:21:14,383 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 06:21:14,383 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 06:21:14,383 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 06:21:14,383 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 06:21:14,383 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 06:21:14,383 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 06:21:14,384 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 06:21:14,384 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 06:21:14,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 06:21:14,384 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 06:21:14,384 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 06:21:14,384 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 06:21:14,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 06:21:14,385 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 06:21:14,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 06:21:14,385 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 06:21:14,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 06:21:14,386 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 06:21:14,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 06:21:14,386 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 06:21:14,386 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 06:21:14,386 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8a667539b0a7850f9a7aa38ebbe1ead0e2c55d4 [2020-12-09 06:21:14,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 06:21:14,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 06:21:14,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 06:21:14,582 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 06:21:14,582 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 06:21:14,583 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/bin/utaipan/../../sv-benchmarks/c/memsafety-ext3/getNumbers4-1.c [2020-12-09 06:21:14,622 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/bin/utaipan/data/5d8b8efb9/54d8f97460f843dca0145d67c47c8515/FLAGa9bb49bd0 [2020-12-09 06:21:14,980 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 06:21:14,980 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/sv-benchmarks/c/memsafety-ext3/getNumbers4-1.c [2020-12-09 06:21:14,991 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/bin/utaipan/data/5d8b8efb9/54d8f97460f843dca0145d67c47c8515/FLAGa9bb49bd0 [2020-12-09 06:21:15,008 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/bin/utaipan/data/5d8b8efb9/54d8f97460f843dca0145d67c47c8515 [2020-12-09 06:21:15,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 06:21:15,011 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 06:21:15,012 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 06:21:15,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 06:21:15,015 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 06:21:15,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:21:15" (1/1) ... [2020-12-09 06:21:15,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3743435e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:21:15, skipping insertion in model container [2020-12-09 06:21:15,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:21:15" (1/1) ... [2020-12-09 06:21:15,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 06:21:15,035 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 06:21:15,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 06:21:15,149 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 06:21:15,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 06:21:15,174 INFO L208 MainTranslator]: Completed translation [2020-12-09 06:21:15,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:21:15 WrapperNode [2020-12-09 06:21:15,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 06:21:15,175 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 06:21:15,175 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 06:21:15,175 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 06:21:15,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:21:15" (1/1) ... [2020-12-09 06:21:15,187 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:21:15" (1/1) ... [2020-12-09 06:21:15,202 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 06:21:15,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 06:21:15,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 06:21:15,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 06:21:15,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:21:15" (1/1) ... [2020-12-09 06:21:15,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:21:15" (1/1) ... [2020-12-09 06:21:15,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:21:15" (1/1) ... [2020-12-09 06:21:15,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:21:15" (1/1) ... [2020-12-09 06:21:15,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:21:15" (1/1) ... [2020-12-09 06:21:15,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:21:15" (1/1) ... [2020-12-09 06:21:15,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:21:15" (1/1) ... [2020-12-09 06:21:15,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 06:21:15,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 06:21:15,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 06:21:15,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 06:21:15,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:21:15" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/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 [2020-12-09 06:21:15,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 06:21:15,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 06:21:15,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 06:21:15,285 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 06:21:15,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 06:21:15,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 06:21:15,660 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 06:21:15,660 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-09 06:21:15,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:21:15 BoogieIcfgContainer [2020-12-09 06:21:15,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 06:21:15,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 06:21:15,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 06:21:15,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 06:21:15,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 06:21:15" (1/3) ... [2020-12-09 06:21:15,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dd78126 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:21:15, skipping insertion in model container [2020-12-09 06:21:15,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:21:15" (2/3) ... [2020-12-09 06:21:15,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dd78126 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:21:15, skipping insertion in model container [2020-12-09 06:21:15,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:21:15" (3/3) ... [2020-12-09 06:21:15,669 INFO L111 eAbstractionObserver]: Analyzing ICFG getNumbers4-1.c [2020-12-09 06:21:15,678 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 06:21:15,681 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 17 error locations. [2020-12-09 06:21:15,688 INFO L253 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2020-12-09 06:21:15,702 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 06:21:15,702 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 06:21:15,702 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 06:21:15,703 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 06:21:15,703 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 06:21:15,703 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 06:21:15,703 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 06:21:15,703 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 06:21:15,712 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-12-09 06:21:15,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 06:21:15,717 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:21:15,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 06:21:15,717 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:21:15,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:21:15,721 INFO L82 PathProgramCache]: Analyzing trace with hash 144472, now seen corresponding path program 1 times [2020-12-09 06:21:15,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:21:15,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268554749] [2020-12-09 06:21:15,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:21:15,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:21:15,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268554749] [2020-12-09 06:21:15,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:21:15,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 06:21:15,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664430433] [2020-12-09 06:21:15,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 06:21:15,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:21:15,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 06:21:15,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 06:21:15,871 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-12-09 06:21:15,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:21:15,904 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-12-09 06:21:15,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 06:21:15,906 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 06:21:15,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:21:15,911 INFO L225 Difference]: With dead ends: 32 [2020-12-09 06:21:15,911 INFO L226 Difference]: Without dead ends: 31 [2020-12-09 06:21:15,912 INFO L677 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 [2020-12-09 06:21:15,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-09 06:21:15,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-09 06:21:15,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 06:21:15,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-12-09 06:21:15,934 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 3 [2020-12-09 06:21:15,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:21:15,934 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-12-09 06:21:15,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 06:21:15,934 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-12-09 06:21:15,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 06:21:15,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:21:15,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 06:21:15,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 06:21:15,935 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:21:15,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:21:15,935 INFO L82 PathProgramCache]: Analyzing trace with hash 144473, now seen corresponding path program 1 times [2020-12-09 06:21:15,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:21:15,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417780000] [2020-12-09 06:21:15,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:21:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:21:15,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417780000] [2020-12-09 06:21:15,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:21:15,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 06:21:15,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456513215] [2020-12-09 06:21:15,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 06:21:15,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:21:15,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 06:21:15,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 06:21:15,984 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 3 states. [2020-12-09 06:21:16,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:21:16,013 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-12-09 06:21:16,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 06:21:16,014 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 06:21:16,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:21:16,015 INFO L225 Difference]: With dead ends: 33 [2020-12-09 06:21:16,015 INFO L226 Difference]: Without dead ends: 33 [2020-12-09 06:21:16,015 INFO L677 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 [2020-12-09 06:21:16,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-09 06:21:16,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-09 06:21:16,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 06:21:16,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-12-09 06:21:16,020 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 3 [2020-12-09 06:21:16,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:21:16,021 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-12-09 06:21:16,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 06:21:16,021 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-12-09 06:21:16,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 06:21:16,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:21:16,021 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-12-09 06:21:16,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 06:21:16,022 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:21:16,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:21:16,022 INFO L82 PathProgramCache]: Analyzing trace with hash 138938820, now seen corresponding path program 1 times [2020-12-09 06:21:16,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:21:16,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820524726] [2020-12-09 06:21:16,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:21:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:16,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:21:16,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820524726] [2020-12-09 06:21:16,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182460102] [2020-12-09 06:21:16,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/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 [2020-12-09 06:21:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:16,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 06:21:16,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:21:16,177 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_39|], 3=[|v_#valid_45|]} [2020-12-09 06:21:16,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 06:21:16,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 06:21:16,240 INFO L348 Elim1Store]: treesize reduction 103, result has 28.5 percent of original size [2020-12-09 06:21:16,240 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 46 [2020-12-09 06:21:16,244 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 06:21:16,274 INFO L625 ElimStorePlain]: treesize reduction 10, result has 84.8 percent of original size [2020-12-09 06:21:16,282 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2020-12-09 06:21:16,290 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2020-12-09 06:21:16,326 INFO L625 ElimStorePlain]: treesize reduction 18, result has 73.5 percent of original size [2020-12-09 06:21:16,332 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 06:21:16,337 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 06:21:16,340 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 06:21:16,343 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 6 disjuncts [2020-12-09 06:21:16,362 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-09 06:21:16,362 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:39, output treesize:50 [2020-12-09 06:21:16,368 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 06:21:16,370 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 06:21:16,372 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 06:21:16,375 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 6 disjuncts [2020-12-09 06:21:16,423 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 06:21:16,425 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 06:21:16,427 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 06:21:16,430 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 6 disjuncts [2020-12-09 06:21:16,502 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 06:21:16,504 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 06:21:16,506 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 06:21:16,508 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 6 disjuncts [2020-12-09 06:21:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:21:16,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:21:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:21:16,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1066678001] [2020-12-09 06:21:16,640 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-12-09 06:21:16,640 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:21:16,644 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:21:16,648 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:21:16,648 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:21:17,352 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:21:18,053 WARN L197 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 118 [2020-12-09 06:21:18,135 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:21:18,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:21:18,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2020-12-09 06:21:18,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583392120] [2020-12-09 06:21:18,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 06:21:18,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:21:18,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 06:21:18,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-12-09 06:21:18,137 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 8 states. [2020-12-09 06:21:18,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:21:18,272 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2020-12-09 06:21:18,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 06:21:18,272 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2020-12-09 06:21:18,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:21:18,273 INFO L225 Difference]: With dead ends: 93 [2020-12-09 06:21:18,273 INFO L226 Difference]: Without dead ends: 93 [2020-12-09 06:21:18,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-12-09 06:21:18,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-09 06:21:18,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 39. [2020-12-09 06:21:18,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-09 06:21:18,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-12-09 06:21:18,278 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 5 [2020-12-09 06:21:18,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:21:18,278 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-12-09 06:21:18,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 06:21:18,278 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-12-09 06:21:18,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 06:21:18,279 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:21:18,279 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2020-12-09 06:21:18,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-09 06:21:18,480 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:21:18,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:21:18,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1218859716, now seen corresponding path program 1 times [2020-12-09 06:21:18,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:21:18,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458165093] [2020-12-09 06:21:18,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:21:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:18,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:21:18,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458165093] [2020-12-09 06:21:18,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896249207] [2020-12-09 06:21:18,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/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 [2020-12-09 06:21:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:18,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 06:21:18,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:21:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:21:18,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:21:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:21:18,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1882109535] [2020-12-09 06:21:18,619 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 06:21:18,619 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:21:18,619 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:21:18,619 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:21:18,619 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:21:19,186 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:21:19,685 WARN L197 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 118 [2020-12-09 06:21:19,928 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 61 [2020-12-09 06:21:19,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:21:19,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4, 4] total 11 [2020-12-09 06:21:19,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053076615] [2020-12-09 06:21:19,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 06:21:19,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:21:19,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 06:21:19,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-12-09 06:21:19,960 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 5 states. [2020-12-09 06:21:20,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:21:20,136 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2020-12-09 06:21:20,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 06:21:20,136 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-09 06:21:20,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:21:20,137 INFO L225 Difference]: With dead ends: 71 [2020-12-09 06:21:20,137 INFO L226 Difference]: Without dead ends: 71 [2020-12-09 06:21:20,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-12-09 06:21:20,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-09 06:21:20,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 41. [2020-12-09 06:21:20,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-09 06:21:20,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-12-09 06:21:20,143 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 8 [2020-12-09 06:21:20,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:21:20,143 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-12-09 06:21:20,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 06:21:20,143 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-12-09 06:21:20,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 06:21:20,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:21:20,143 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2020-12-09 06:21:20,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-09 06:21:20,345 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:21:20,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:21:20,346 INFO L82 PathProgramCache]: Analyzing trace with hash 870054440, now seen corresponding path program 1 times [2020-12-09 06:21:20,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:21:20,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615664519] [2020-12-09 06:21:20,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:21:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:21:20,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615664519] [2020-12-09 06:21:20,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153519099] [2020-12-09 06:21:20,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/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 [2020-12-09 06:21:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:20,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 06:21:20,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:21:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:21:20,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:21:20,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:21:20,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1958355297] [2020-12-09 06:21:20,439 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 06:21:20,439 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:21:20,439 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:21:20,439 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:21:20,440 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:21:20,943 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:21:21,117 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 70 [2020-12-09 06:21:21,645 WARN L197 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 118 [2020-12-09 06:21:21,902 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 61 [2020-12-09 06:21:22,148 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 67 [2020-12-09 06:21:22,148 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:21:22,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:21:22,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2020-12-09 06:21:22,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242717775] [2020-12-09 06:21:22,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 06:21:22,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:21:22,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 06:21:22,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-09 06:21:22,150 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 9 states. [2020-12-09 06:21:22,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:21:22,171 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-12-09 06:21:22,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 06:21:22,171 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-09 06:21:22,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:21:22,172 INFO L225 Difference]: With dead ends: 45 [2020-12-09 06:21:22,172 INFO L226 Difference]: Without dead ends: 45 [2020-12-09 06:21:22,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-09 06:21:22,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-09 06:21:22,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-12-09 06:21:22,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-09 06:21:22,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-12-09 06:21:22,175 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 9 [2020-12-09 06:21:22,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:21:22,175 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-12-09 06:21:22,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 06:21:22,175 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-12-09 06:21:22,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 06:21:22,175 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:21:22,175 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2020-12-09 06:21:22,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-09 06:21:22,377 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:21:22,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:21:22,378 INFO L82 PathProgramCache]: Analyzing trace with hash -541970043, now seen corresponding path program 2 times [2020-12-09 06:21:22,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:21:22,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444911089] [2020-12-09 06:21:22,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:21:22,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:22,487 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:21:22,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444911089] [2020-12-09 06:21:22,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331450315] [2020-12-09 06:21:22,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/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 [2020-12-09 06:21:22,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 06:21:22,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:21:22,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 06:21:22,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:21:23,121 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-09 06:21:23,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:21:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-09 06:21:23,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 06:21:23,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 11 [2020-12-09 06:21:23,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115461843] [2020-12-09 06:21:23,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 06:21:23,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:21:23,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 06:21:23,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-12-09 06:21:23,198 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 5 states. [2020-12-09 06:21:23,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:21:23,242 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-12-09 06:21:23,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 06:21:23,243 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 06:21:23,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:21:23,243 INFO L225 Difference]: With dead ends: 43 [2020-12-09 06:21:23,243 INFO L226 Difference]: Without dead ends: 43 [2020-12-09 06:21:23,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-12-09 06:21:23,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-09 06:21:23,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-09 06:21:23,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-09 06:21:23,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-12-09 06:21:23,247 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 11 [2020-12-09 06:21:23,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:21:23,248 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-12-09 06:21:23,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 06:21:23,248 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-12-09 06:21:23,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 06:21:23,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:21:23,248 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2020-12-09 06:21:23,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:21:23,449 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:21:23,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:21:23,451 INFO L82 PathProgramCache]: Analyzing trace with hash -194222508, now seen corresponding path program 2 times [2020-12-09 06:21:23,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:21:23,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704970251] [2020-12-09 06:21:23,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:21:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:23,631 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:21:23,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704970251] [2020-12-09 06:21:23,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466193858] [2020-12-09 06:21:23,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/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 [2020-12-09 06:21:23,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 06:21:23,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:21:23,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 06:21:23,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:21:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-09 06:21:24,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:21:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-09 06:21:24,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 06:21:24,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [8] total 10 [2020-12-09 06:21:24,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947627236] [2020-12-09 06:21:24,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 06:21:24,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:21:24,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 06:21:24,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-12-09 06:21:24,416 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 4 states. [2020-12-09 06:21:24,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:21:24,439 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-12-09 06:21:24,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 06:21:24,439 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-09 06:21:24,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:21:24,440 INFO L225 Difference]: With dead ends: 42 [2020-12-09 06:21:24,440 INFO L226 Difference]: Without dead ends: 42 [2020-12-09 06:21:24,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 15 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-12-09 06:21:24,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-09 06:21:24,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-09 06:21:24,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-09 06:21:24,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-12-09 06:21:24,444 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 17 [2020-12-09 06:21:24,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:21:24,444 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-12-09 06:21:24,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 06:21:24,444 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-12-09 06:21:24,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 06:21:24,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:21:24,445 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2020-12-09 06:21:24,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-12-09 06:21:24,646 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:21:24,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:21:24,646 INFO L82 PathProgramCache]: Analyzing trace with hash -194222507, now seen corresponding path program 1 times [2020-12-09 06:21:24,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:21:24,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188707176] [2020-12-09 06:21:24,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:21:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:21:24,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188707176] [2020-12-09 06:21:24,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104600177] [2020-12-09 06:21:24,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/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 [2020-12-09 06:21:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:24,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 06:21:24,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:21:24,854 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:21:24,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:21:24,887 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:21:24,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [226572304] [2020-12-09 06:21:24,888 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 06:21:24,888 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:21:24,888 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:21:24,888 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:21:24,888 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:21:25,438 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:21:25,661 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 71 [2020-12-09 06:21:26,176 WARN L197 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 118 [2020-12-09 06:21:26,446 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 61 [2020-12-09 06:21:26,727 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 67 [2020-12-09 06:21:26,728 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:21:26,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:21:26,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2020-12-09 06:21:26,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301122196] [2020-12-09 06:21:26,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-09 06:21:26,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:21:26,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-09 06:21:26,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-12-09 06:21:26,729 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 13 states. [2020-12-09 06:21:26,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:21:26,754 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-12-09 06:21:26,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 06:21:26,755 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-12-09 06:21:26,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:21:26,755 INFO L225 Difference]: With dead ends: 50 [2020-12-09 06:21:26,755 INFO L226 Difference]: Without dead ends: 50 [2020-12-09 06:21:26,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-12-09 06:21:26,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-09 06:21:26,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-09 06:21:26,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-09 06:21:26,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-12-09 06:21:26,758 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 17 [2020-12-09 06:21:26,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:21:26,758 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-12-09 06:21:26,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-09 06:21:26,758 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-12-09 06:21:26,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-09 06:21:26,759 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:21:26,759 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2020-12-09 06:21:26,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:21:26,960 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:21:26,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:21:26,961 INFO L82 PathProgramCache]: Analyzing trace with hash 2140399233, now seen corresponding path program 2 times [2020-12-09 06:21:26,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:21:26,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427924122] [2020-12-09 06:21:26,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:21:26,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:27,013 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 06:21:27,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427924122] [2020-12-09 06:21:27,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:21:27,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 06:21:27,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943738603] [2020-12-09 06:21:27,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 06:21:27,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:21:27,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 06:21:27,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 06:21:27,014 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 4 states. [2020-12-09 06:21:27,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:21:27,044 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-12-09 06:21:27,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 06:21:27,045 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-12-09 06:21:27,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:21:27,045 INFO L225 Difference]: With dead ends: 51 [2020-12-09 06:21:27,045 INFO L226 Difference]: Without dead ends: 51 [2020-12-09 06:21:27,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 06:21:27,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-09 06:21:27,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-09 06:21:27,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-09 06:21:27,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-12-09 06:21:27,048 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 25 [2020-12-09 06:21:27,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:21:27,048 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-12-09 06:21:27,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 06:21:27,048 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-12-09 06:21:27,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-09 06:21:27,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:21:27,049 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1] [2020-12-09 06:21:27,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2020-12-09 06:21:27,049 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:21:27,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:21:27,049 INFO L82 PathProgramCache]: Analyzing trace with hash -365594060, now seen corresponding path program 1 times [2020-12-09 06:21:27,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:21:27,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501252492] [2020-12-09 06:21:27,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:21:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:27,192 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 72 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:21:27,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501252492] [2020-12-09 06:21:27,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895055702] [2020-12-09 06:21:27,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/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 [2020-12-09 06:21:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:27,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-09 06:21:27,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:21:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 90 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:21:27,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:21:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 90 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:21:27,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1100778067] [2020-12-09 06:21:27,639 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 06:21:27,639 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:21:27,639 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:21:27,639 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:21:27,639 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:21:28,194 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:21:28,886 WARN L197 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 118 [2020-12-09 06:21:29,266 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-12-09 06:21:29,515 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:21:29,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:21:29,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2020-12-09 06:21:29,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191719518] [2020-12-09 06:21:29,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-09 06:21:29,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:21:29,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-09 06:21:29,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=594, Invalid=1476, Unknown=0, NotChecked=0, Total=2070 [2020-12-09 06:21:29,518 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 41 states. [2020-12-09 06:21:29,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:21:29,949 INFO L93 Difference]: Finished difference Result 104 states and 114 transitions. [2020-12-09 06:21:29,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-09 06:21:29,949 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 27 [2020-12-09 06:21:29,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:21:29,950 INFO L225 Difference]: With dead ends: 104 [2020-12-09 06:21:29,950 INFO L226 Difference]: Without dead ends: 104 [2020-12-09 06:21:29,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1068, Invalid=2472, Unknown=0, NotChecked=0, Total=3540 [2020-12-09 06:21:29,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-09 06:21:29,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 59. [2020-12-09 06:21:29,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-09 06:21:29,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2020-12-09 06:21:29,955 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 27 [2020-12-09 06:21:29,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:21:29,955 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2020-12-09 06:21:29,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-09 06:21:29,955 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2020-12-09 06:21:29,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-09 06:21:29,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:21:29,956 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1] [2020-12-09 06:21:30,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-12-09 06:21:30,157 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:21:30,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:21:30,157 INFO L82 PathProgramCache]: Analyzing trace with hash -365594061, now seen corresponding path program 1 times [2020-12-09 06:21:30,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:21:30,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519439528] [2020-12-09 06:21:30,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:21:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:30,174 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 06:21:30,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519439528] [2020-12-09 06:21:30,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:21:30,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 06:21:30,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913136097] [2020-12-09 06:21:30,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 06:21:30,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:21:30,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 06:21:30,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 06:21:30,175 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 3 states. [2020-12-09 06:21:30,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:21:30,192 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-12-09 06:21:30,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 06:21:30,192 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-12-09 06:21:30,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:21:30,194 INFO L225 Difference]: With dead ends: 58 [2020-12-09 06:21:30,194 INFO L226 Difference]: Without dead ends: 58 [2020-12-09 06:21:30,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 06:21:30,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-09 06:21:30,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-09 06:21:30,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-09 06:21:30,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-12-09 06:21:30,197 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 27 [2020-12-09 06:21:30,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:21:30,197 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-12-09 06:21:30,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 06:21:30,197 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-12-09 06:21:30,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-09 06:21:30,198 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:21:30,198 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1] [2020-12-09 06:21:30,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2020-12-09 06:21:30,198 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:21:30,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:21:30,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1551486001, now seen corresponding path program 1 times [2020-12-09 06:21:30,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:21:30,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281706565] [2020-12-09 06:21:30,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:21:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:30,254 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 06:21:30,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281706565] [2020-12-09 06:21:30,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738064776] [2020-12-09 06:21:30,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/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 [2020-12-09 06:21:30,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:30,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 06:21:30,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:21:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 06:21:30,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:21:30,443 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 06:21:30,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [218204836] [2020-12-09 06:21:30,444 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 06:21:30,444 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:21:30,444 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:21:30,444 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:21:30,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:21:31,083 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:21:31,207 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2020-12-09 06:21:31,748 WARN L197 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 118 [2020-12-09 06:21:32,078 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-12-09 06:21:32,222 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-09 06:21:32,242 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:21:32,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:21:32,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2020-12-09 06:21:32,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760383012] [2020-12-09 06:21:32,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 06:21:32,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:21:32,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 06:21:32,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-12-09 06:21:32,243 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 8 states. [2020-12-09 06:21:32,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:21:32,333 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-12-09 06:21:32,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 06:21:32,333 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-12-09 06:21:32,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:21:32,334 INFO L225 Difference]: With dead ends: 59 [2020-12-09 06:21:32,334 INFO L226 Difference]: Without dead ends: 59 [2020-12-09 06:21:32,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-12-09 06:21:32,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-09 06:21:32,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-09 06:21:32,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-09 06:21:32,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-12-09 06:21:32,338 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 28 [2020-12-09 06:21:32,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:21:32,338 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-12-09 06:21:32,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 06:21:32,338 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-12-09 06:21:32,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-09 06:21:32,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:21:32,339 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 4, 4, 1, 1, 1] [2020-12-09 06:21:32,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-12-09 06:21:32,541 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:21:32,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:21:32,542 INFO L82 PathProgramCache]: Analyzing trace with hash -808709660, now seen corresponding path program 2 times [2020-12-09 06:21:32,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:21:32,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760094057] [2020-12-09 06:21:32,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:21:32,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 72 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:21:32,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760094057] [2020-12-09 06:21:32,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516975929] [2020-12-09 06:21:32,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/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 [2020-12-09 06:21:32,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 06:21:32,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:21:32,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 06:21:32,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:21:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-12-09 06:21:34,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:21:34,314 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-12-09 06:21:34,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 06:21:34,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16, 5] total 26 [2020-12-09 06:21:34,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898222378] [2020-12-09 06:21:34,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 06:21:34,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:21:34,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 06:21:34,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2020-12-09 06:21:34,315 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 7 states. [2020-12-09 06:21:34,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:21:34,503 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2020-12-09 06:21:34,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 06:21:34,503 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-12-09 06:21:34,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:21:34,504 INFO L225 Difference]: With dead ends: 58 [2020-12-09 06:21:34,504 INFO L226 Difference]: Without dead ends: 58 [2020-12-09 06:21:34,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 20 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2020-12-09 06:21:34,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-09 06:21:34,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-09 06:21:34,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-09 06:21:34,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-12-09 06:21:34,506 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 36 [2020-12-09 06:21:34,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:21:34,506 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-12-09 06:21:34,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 06:21:34,506 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-12-09 06:21:34,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-09 06:21:34,507 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:21:34,507 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 1, 1, 1, 1, 1] [2020-12-09 06:21:34,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:21:34,709 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:21:34,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:21:34,710 INFO L82 PathProgramCache]: Analyzing trace with hash 699901090, now seen corresponding path program 1 times [2020-12-09 06:21:34,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:21:34,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245125512] [2020-12-09 06:21:34,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:21:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:34,751 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-12-09 06:21:34,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245125512] [2020-12-09 06:21:34,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:21:34,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 06:21:34,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997912530] [2020-12-09 06:21:34,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 06:21:34,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:21:34,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 06:21:34,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 06:21:34,752 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 4 states. [2020-12-09 06:21:34,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:21:34,775 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2020-12-09 06:21:34,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 06:21:34,775 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-12-09 06:21:34,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:21:34,776 INFO L225 Difference]: With dead ends: 57 [2020-12-09 06:21:34,776 INFO L226 Difference]: Without dead ends: 57 [2020-12-09 06:21:34,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 06:21:34,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-09 06:21:34,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-09 06:21:34,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-09 06:21:34,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-12-09 06:21:34,778 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 37 [2020-12-09 06:21:34,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:21:34,778 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-12-09 06:21:34,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 06:21:34,778 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-12-09 06:21:34,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-09 06:21:34,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:21:34,779 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 1, 1, 1, 1, 1] [2020-12-09 06:21:34,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2020-12-09 06:21:34,779 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:21:34,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:21:34,779 INFO L82 PathProgramCache]: Analyzing trace with hash 699901091, now seen corresponding path program 1 times [2020-12-09 06:21:34,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:21:34,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907506127] [2020-12-09 06:21:34,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:21:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:34,825 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-12-09 06:21:34,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907506127] [2020-12-09 06:21:34,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774917995] [2020-12-09 06:21:34,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/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 [2020-12-09 06:21:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:34,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 06:21:34,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:21:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 06:21:34,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:21:34,974 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 06:21:34,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1477687163] [2020-12-09 06:21:34,975 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 06:21:34,975 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:21:34,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:21:34,976 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:21:34,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:21:35,564 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:21:35,729 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2020-12-09 06:21:36,271 WARN L197 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 118 [2020-12-09 06:21:36,592 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-12-09 06:21:36,961 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-12-09 06:21:37,001 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:21:37,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:21:37,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 16 [2020-12-09 06:21:37,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033713652] [2020-12-09 06:21:37,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-09 06:21:37,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:21:37,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-09 06:21:37,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-12-09 06:21:37,003 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 16 states. [2020-12-09 06:21:37,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:21:37,217 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2020-12-09 06:21:37,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-09 06:21:37,218 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-12-09 06:21:37,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:21:37,218 INFO L225 Difference]: With dead ends: 83 [2020-12-09 06:21:37,218 INFO L226 Difference]: Without dead ends: 83 [2020-12-09 06:21:37,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2020-12-09 06:21:37,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-09 06:21:37,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2020-12-09 06:21:37,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-09 06:21:37,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2020-12-09 06:21:37,221 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 37 [2020-12-09 06:21:37,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:21:37,221 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2020-12-09 06:21:37,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-09 06:21:37,221 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2020-12-09 06:21:37,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-09 06:21:37,222 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:21:37,222 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 4, 1, 1, 1] [2020-12-09 06:21:37,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:21:37,423 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:21:37,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:21:37,424 INFO L82 PathProgramCache]: Analyzing trace with hash 699804289, now seen corresponding path program 2 times [2020-12-09 06:21:37,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:21:37,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972966512] [2020-12-09 06:21:37,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:21:37,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:37,532 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 06:21:37,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972966512] [2020-12-09 06:21:37,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538689319] [2020-12-09 06:21:37,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/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 [2020-12-09 06:21:37,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 06:21:37,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:21:37,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 06:21:37,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:21:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2020-12-09 06:21:37,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:21:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2020-12-09 06:21:37,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1228792416] [2020-12-09 06:21:37,838 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 06:21:37,838 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:21:37,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:21:37,838 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:21:37,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:21:38,366 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:21:38,510 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2020-12-09 06:21:39,068 WARN L197 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 118 [2020-12-09 06:21:39,432 WARN L197 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-12-09 06:21:39,591 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-09 06:21:39,702 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:21:39,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:21:39,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2020-12-09 06:21:39,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491487439] [2020-12-09 06:21:39,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-09 06:21:39,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:21:39,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-09 06:21:39,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2020-12-09 06:21:39,703 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand 16 states. [2020-12-09 06:21:39,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:21:39,953 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2020-12-09 06:21:39,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 06:21:39,953 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-12-09 06:21:39,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:21:39,953 INFO L225 Difference]: With dead ends: 74 [2020-12-09 06:21:39,954 INFO L226 Difference]: Without dead ends: 74 [2020-12-09 06:21:39,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=183, Invalid=629, Unknown=0, NotChecked=0, Total=812 [2020-12-09 06:21:39,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-09 06:21:39,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-09 06:21:39,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-09 06:21:39,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-12-09 06:21:39,956 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 37 [2020-12-09 06:21:39,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:21:39,956 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-12-09 06:21:39,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-09 06:21:39,956 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-12-09 06:21:39,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-09 06:21:39,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:21:39,956 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2020-12-09 06:21:40,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:21:40,158 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:21:40,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:21:40,158 INFO L82 PathProgramCache]: Analyzing trace with hash 555846072, now seen corresponding path program 1 times [2020-12-09 06:21:40,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:21:40,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060446470] [2020-12-09 06:21:40,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:21:40,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-09 06:21:40,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060446470] [2020-12-09 06:21:40,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:21:40,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 06:21:40,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572783623] [2020-12-09 06:21:40,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 06:21:40,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:21:40,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 06:21:40,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 06:21:40,202 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 3 states. [2020-12-09 06:21:40,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:21:40,217 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2020-12-09 06:21:40,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 06:21:40,217 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-09 06:21:40,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:21:40,218 INFO L225 Difference]: With dead ends: 73 [2020-12-09 06:21:40,218 INFO L226 Difference]: Without dead ends: 73 [2020-12-09 06:21:40,218 INFO L677 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 [2020-12-09 06:21:40,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-09 06:21:40,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-12-09 06:21:40,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-09 06:21:40,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-12-09 06:21:40,220 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 56 [2020-12-09 06:21:40,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:21:40,220 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-12-09 06:21:40,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 06:21:40,220 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-12-09 06:21:40,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-09 06:21:40,220 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:21:40,221 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2020-12-09 06:21:40,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296 [2020-12-09 06:21:40,221 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:21:40,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:21:40,221 INFO L82 PathProgramCache]: Analyzing trace with hash 555846073, now seen corresponding path program 1 times [2020-12-09 06:21:40,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:21:40,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125427174] [2020-12-09 06:21:40,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:21:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:40,292 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-09 06:21:40,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125427174] [2020-12-09 06:21:40,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:21:40,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 06:21:40,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988378456] [2020-12-09 06:21:40,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 06:21:40,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:21:40,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 06:21:40,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 06:21:40,293 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 4 states. [2020-12-09 06:21:40,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:21:40,323 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2020-12-09 06:21:40,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 06:21:40,323 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-12-09 06:21:40,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:21:40,323 INFO L225 Difference]: With dead ends: 74 [2020-12-09 06:21:40,324 INFO L226 Difference]: Without dead ends: 74 [2020-12-09 06:21:40,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 06:21:40,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-09 06:21:40,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-09 06:21:40,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-09 06:21:40,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-12-09 06:21:40,325 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 56 [2020-12-09 06:21:40,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:21:40,325 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-12-09 06:21:40,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 06:21:40,326 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-12-09 06:21:40,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-09 06:21:40,326 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:21:40,326 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 06:21:40,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297 [2020-12-09 06:21:40,326 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:21:40,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:21:40,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1592198464, now seen corresponding path program 1 times [2020-12-09 06:21:40,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:21:40,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028953792] [2020-12-09 06:21:40,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:21:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:40,466 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 108 proven. 39 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 06:21:40,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028953792] [2020-12-09 06:21:40,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317479940] [2020-12-09 06:21:40,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/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 [2020-12-09 06:21:40,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:40,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-09 06:21:40,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:21:40,716 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 135 proven. 12 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 06:21:40,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:21:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 135 proven. 12 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 06:21:40,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1805304035] [2020-12-09 06:21:40,980 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 06:21:40,980 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:21:40,980 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:21:40,980 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:21:40,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:21:41,613 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:21:41,782 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2020-12-09 06:21:42,420 WARN L197 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 118 [2020-12-09 06:21:42,804 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-12-09 06:21:42,993 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-09 06:21:43,495 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-12-09 06:21:43,661 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-12-09 06:21:43,862 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2020-12-09 06:21:43,862 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:21:43,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:21:43,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2020-12-09 06:21:43,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359420156] [2020-12-09 06:21:43,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-09 06:21:43,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:21:43,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-09 06:21:43,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=739, Invalid=1913, Unknown=0, NotChecked=0, Total=2652 [2020-12-09 06:21:43,865 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 44 states. [2020-12-09 06:21:44,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:21:44,304 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2020-12-09 06:21:44,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-09 06:21:44,304 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 58 [2020-12-09 06:21:44,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:21:44,305 INFO L225 Difference]: With dead ends: 110 [2020-12-09 06:21:44,305 INFO L226 Difference]: Without dead ends: 110 [2020-12-09 06:21:44,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 126 SyntacticMatches, 10 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2110 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1255, Invalid=3035, Unknown=0, NotChecked=0, Total=4290 [2020-12-09 06:21:44,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-09 06:21:44,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-12-09 06:21:44,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-09 06:21:44,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2020-12-09 06:21:44,307 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 58 [2020-12-09 06:21:44,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:21:44,308 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2020-12-09 06:21:44,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-09 06:21:44,308 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2020-12-09 06:21:44,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-09 06:21:44,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:21:44,308 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1] [2020-12-09 06:21:44,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2020-12-09 06:21:44,510 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:21:44,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:21:44,511 INFO L82 PathProgramCache]: Analyzing trace with hash 2113512124, now seen corresponding path program 1 times [2020-12-09 06:21:44,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:21:44,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755824630] [2020-12-09 06:21:44,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:21:44,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-09 06:21:44,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755824630] [2020-12-09 06:21:44,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914600218] [2020-12-09 06:21:44,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/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 [2020-12-09 06:21:44,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:44,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 06:21:44,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:21:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-09 06:21:45,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:21:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-09 06:21:45,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [901149896] [2020-12-09 06:21:45,275 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 06:21:45,275 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:21:45,275 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:21:45,275 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:21:45,275 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:21:45,967 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:21:46,148 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2020-12-09 06:21:46,690 WARN L197 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 118 [2020-12-09 06:21:47,020 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-12-09 06:21:47,580 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-12-09 06:21:47,741 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-12-09 06:21:47,945 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2020-12-09 06:21:47,946 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:21:47,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:21:47,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2020-12-09 06:21:47,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707617760] [2020-12-09 06:21:47,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 06:21:47,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:21:47,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 06:21:47,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-12-09 06:21:47,947 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand 11 states. [2020-12-09 06:21:48,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:21:48,061 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2020-12-09 06:21:48,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 06:21:48,061 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-12-09 06:21:48,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:21:48,062 INFO L225 Difference]: With dead ends: 83 [2020-12-09 06:21:48,062 INFO L226 Difference]: Without dead ends: 83 [2020-12-09 06:21:48,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 151 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2020-12-09 06:21:48,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-09 06:21:48,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-12-09 06:21:48,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-09 06:21:48,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2020-12-09 06:21:48,064 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 59 [2020-12-09 06:21:48,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:21:48,064 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2020-12-09 06:21:48,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 06:21:48,064 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2020-12-09 06:21:48,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-09 06:21:48,064 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:21:48,064 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 4, 4, 1, 1, 1, 1] [2020-12-09 06:21:48,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable360 [2020-12-09 06:21:48,265 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:21:48,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:21:48,266 INFO L82 PathProgramCache]: Analyzing trace with hash -284729245, now seen corresponding path program 2 times [2020-12-09 06:21:48,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:21:48,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394494369] [2020-12-09 06:21:48,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:21:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:48,493 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 108 proven. 63 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 06:21:48,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394494369] [2020-12-09 06:21:48,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769724415] [2020-12-09 06:21:48,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/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 [2020-12-09 06:21:48,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 06:21:48,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:21:48,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-09 06:21:48,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:21:48,737 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2020-12-09 06:21:48,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:21:48,958 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2020-12-09 06:21:48,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1631745667] [2020-12-09 06:21:48,959 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 06:21:48,959 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:21:48,959 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:21:48,959 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:21:48,960 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:21:49,614 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:21:49,815 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2020-12-09 06:21:50,472 WARN L197 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 118 [2020-12-09 06:21:50,851 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-12-09 06:21:51,043 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-09 06:21:51,618 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-12-09 06:21:51,816 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-12-09 06:21:52,056 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2020-12-09 06:21:52,057 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:21:52,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:21:52,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 4, 4] total 25 [2020-12-09 06:21:52,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530786170] [2020-12-09 06:21:52,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-09 06:21:52,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:21:52,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-09 06:21:52,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2020-12-09 06:21:52,058 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 27 states. [2020-12-09 06:21:52,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:21:52,753 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2020-12-09 06:21:52,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-09 06:21:52,753 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 67 [2020-12-09 06:21:52,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:21:52,754 INFO L225 Difference]: With dead ends: 87 [2020-12-09 06:21:52,754 INFO L226 Difference]: Without dead ends: 87 [2020-12-09 06:21:52,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 173 SyntacticMatches, 10 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=558, Invalid=2094, Unknown=0, NotChecked=0, Total=2652 [2020-12-09 06:21:52,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-09 06:21:52,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-12-09 06:21:52,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-09 06:21:52,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2020-12-09 06:21:52,756 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 67 [2020-12-09 06:21:52,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:21:52,756 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2020-12-09 06:21:52,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-09 06:21:52,756 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2020-12-09 06:21:52,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-09 06:21:52,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:21:52,757 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 5, 4, 1, 1, 1, 1] [2020-12-09 06:21:52,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:21:52,958 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:21:52,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:21:52,958 INFO L82 PathProgramCache]: Analyzing trace with hash -236672007, now seen corresponding path program 2 times [2020-12-09 06:21:52,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:21:52,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501672350] [2020-12-09 06:21:52,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:21:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-09 06:21:53,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501672350] [2020-12-09 06:21:53,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310007397] [2020-12-09 06:21:53,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/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 [2020-12-09 06:21:53,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 06:21:53,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:21:53,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 06:21:53,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:21:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2020-12-09 06:21:53,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:21:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2020-12-09 06:21:53,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [294764923] [2020-12-09 06:21:53,895 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 06:21:53,895 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:21:53,895 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:21:53,895 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:21:53,895 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:21:54,573 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:21:54,759 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2020-12-09 06:21:55,396 WARN L197 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 118 [2020-12-09 06:21:55,742 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-12-09 06:21:55,915 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-09 06:21:56,309 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-12-09 06:21:56,472 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-12-09 06:21:56,659 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2020-12-09 06:21:56,660 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:21:56,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:21:56,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2020-12-09 06:21:56,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433482397] [2020-12-09 06:21:56,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-09 06:21:56,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:21:56,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-09 06:21:56,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2020-12-09 06:21:56,661 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 16 states. [2020-12-09 06:21:56,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:21:56,994 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2020-12-09 06:21:56,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 06:21:56,994 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2020-12-09 06:21:56,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:21:56,995 INFO L225 Difference]: With dead ends: 86 [2020-12-09 06:21:56,995 INFO L226 Difference]: Without dead ends: 86 [2020-12-09 06:21:56,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 176 SyntacticMatches, 10 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2020-12-09 06:21:56,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-09 06:21:56,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-09 06:21:56,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-09 06:21:56,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2020-12-09 06:21:56,997 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 68 [2020-12-09 06:21:56,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:21:56,997 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2020-12-09 06:21:56,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-09 06:21:56,997 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2020-12-09 06:21:56,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-09 06:21:56,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:21:56,998 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-09 06:21:57,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2020-12-09 06:21:57,199 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:21:57,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:21:57,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1653474581, now seen corresponding path program 1 times [2020-12-09 06:21:57,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:21:57,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760241019] [2020-12-09 06:21:57,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:21:57,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:57,266 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-12-09 06:21:57,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760241019] [2020-12-09 06:21:57,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:21:57,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 06:21:57,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935171123] [2020-12-09 06:21:57,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 06:21:57,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:21:57,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 06:21:57,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 06:21:57,268 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 4 states. [2020-12-09 06:21:57,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:21:57,296 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2020-12-09 06:21:57,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 06:21:57,297 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-12-09 06:21:57,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:21:57,298 INFO L225 Difference]: With dead ends: 84 [2020-12-09 06:21:57,298 INFO L226 Difference]: Without dead ends: 84 [2020-12-09 06:21:57,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 06:21:57,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-09 06:21:57,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-12-09 06:21:57,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-09 06:21:57,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2020-12-09 06:21:57,299 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 74 [2020-12-09 06:21:57,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:21:57,300 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2020-12-09 06:21:57,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 06:21:57,300 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2020-12-09 06:21:57,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-09 06:21:57,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:21:57,300 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-09 06:21:57,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548 [2020-12-09 06:21:57,300 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:21:57,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:21:57,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1653474580, now seen corresponding path program 1 times [2020-12-09 06:21:57,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:21:57,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090673417] [2020-12-09 06:21:57,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:21:57,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-09 06:21:57,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090673417] [2020-12-09 06:21:57,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7368917] [2020-12-09 06:21:57,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/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 [2020-12-09 06:21:57,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:21:57,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 06:21:57,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:21:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-09 06:21:57,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:21:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-09 06:21:57,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [604686758] [2020-12-09 06:21:57,559 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 06:21:57,559 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:21:57,559 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:21:57,559 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:21:57,559 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:21:58,221 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:21:58,413 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 74 [2020-12-09 06:21:59,008 WARN L197 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 118 [2020-12-09 06:21:59,340 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-12-09 06:21:59,786 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-12-09 06:21:59,937 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-12-09 06:22:00,123 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2020-12-09 06:22:00,308 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2020-12-09 06:22:00,348 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:22:00,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:22:00,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2020-12-09 06:22:00,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376329958] [2020-12-09 06:22:00,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-09 06:22:00,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:22:00,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-09 06:22:00,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2020-12-09 06:22:00,350 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 13 states. [2020-12-09 06:22:00,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:22:00,394 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2020-12-09 06:22:00,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 06:22:00,395 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 74 [2020-12-09 06:22:00,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:22:00,395 INFO L225 Difference]: With dead ends: 96 [2020-12-09 06:22:00,395 INFO L226 Difference]: Without dead ends: 96 [2020-12-09 06:22:00,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 197 SyntacticMatches, 12 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2020-12-09 06:22:00,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-09 06:22:00,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-12-09 06:22:00,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-09 06:22:00,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2020-12-09 06:22:00,397 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 74 [2020-12-09 06:22:00,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:22:00,397 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2020-12-09 06:22:00,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-09 06:22:00,397 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2020-12-09 06:22:00,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-09 06:22:00,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:22:00,398 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2020-12-09 06:22:00,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:22:00,599 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:22:00,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:22:00,600 INFO L82 PathProgramCache]: Analyzing trace with hash -284619476, now seen corresponding path program 2 times [2020-12-09 06:22:00,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:22:00,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463825143] [2020-12-09 06:22:00,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:22:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:22:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 108 proven. 37 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-09 06:22:00,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463825143] [2020-12-09 06:22:00,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289812912] [2020-12-09 06:22:00,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/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 [2020-12-09 06:22:00,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 06:22:00,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:22:00,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-09 06:22:00,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:22:01,498 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-12-09 06:22:01,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:22:01,598 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-12-09 06:22:01,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 06:22:01,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [13] total 17 [2020-12-09 06:22:01,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113064904] [2020-12-09 06:22:01,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 06:22:01,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:22:01,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 06:22:01,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-12-09 06:22:01,599 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 6 states. [2020-12-09 06:22:01,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:22:01,688 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2020-12-09 06:22:01,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 06:22:01,688 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2020-12-09 06:22:01,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:22:01,689 INFO L225 Difference]: With dead ends: 109 [2020-12-09 06:22:01,689 INFO L226 Difference]: Without dead ends: 109 [2020-12-09 06:22:01,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2020-12-09 06:22:01,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-09 06:22:01,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2020-12-09 06:22:01,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-09 06:22:01,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2020-12-09 06:22:01,691 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 86 [2020-12-09 06:22:01,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:22:01,691 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2020-12-09 06:22:01,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 06:22:01,691 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2020-12-09 06:22:01,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-09 06:22:01,692 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:22:01,692 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:22:01,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2020-12-09 06:22:01,893 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:22:01,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:22:01,893 INFO L82 PathProgramCache]: Analyzing trace with hash -233269146, now seen corresponding path program 1 times [2020-12-09 06:22:01,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:22:01,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686257274] [2020-12-09 06:22:01,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:22:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:22:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-12-09 06:22:01,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686257274] [2020-12-09 06:22:01,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:22:01,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 06:22:01,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395931480] [2020-12-09 06:22:01,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 06:22:01,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:22:01,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 06:22:01,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 06:22:01,934 INFO L87 Difference]: Start difference. First operand 101 states and 108 transitions. Second operand 3 states. [2020-12-09 06:22:01,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:22:01,952 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2020-12-09 06:22:01,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 06:22:01,953 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-12-09 06:22:01,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:22:01,954 INFO L225 Difference]: With dead ends: 100 [2020-12-09 06:22:01,954 INFO L226 Difference]: Without dead ends: 100 [2020-12-09 06:22:01,954 INFO L677 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 [2020-12-09 06:22:01,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-09 06:22:01,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-12-09 06:22:01,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-09 06:22:01,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2020-12-09 06:22:01,957 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 87 [2020-12-09 06:22:01,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:22:01,957 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2020-12-09 06:22:01,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 06:22:01,957 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2020-12-09 06:22:01,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-09 06:22:01,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:22:01,958 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:22:01,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable612 [2020-12-09 06:22:01,958 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:22:01,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:22:01,959 INFO L82 PathProgramCache]: Analyzing trace with hash -233269145, now seen corresponding path program 1 times [2020-12-09 06:22:01,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:22:01,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394234319] [2020-12-09 06:22:01,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:22:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:22:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-12-09 06:22:02,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394234319] [2020-12-09 06:22:02,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:22:02,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 06:22:02,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774215489] [2020-12-09 06:22:02,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 06:22:02,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:22:02,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 06:22:02,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 06:22:02,051 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand 4 states. [2020-12-09 06:22:02,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:22:02,084 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2020-12-09 06:22:02,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 06:22:02,085 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2020-12-09 06:22:02,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:22:02,086 INFO L225 Difference]: With dead ends: 100 [2020-12-09 06:22:02,086 INFO L226 Difference]: Without dead ends: 100 [2020-12-09 06:22:02,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 06:22:02,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-09 06:22:02,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-12-09 06:22:02,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-09 06:22:02,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2020-12-09 06:22:02,089 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 87 [2020-12-09 06:22:02,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:22:02,089 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2020-12-09 06:22:02,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 06:22:02,089 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2020-12-09 06:22:02,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-09 06:22:02,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:22:02,090 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:22:02,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable613 [2020-12-09 06:22:02,090 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:22:02,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:22:02,090 INFO L82 PathProgramCache]: Analyzing trace with hash -62510508, now seen corresponding path program 1 times [2020-12-09 06:22:02,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:22:02,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301759254] [2020-12-09 06:22:02,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:22:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:22:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-12-09 06:22:02,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301759254] [2020-12-09 06:22:02,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642397211] [2020-12-09 06:22:02,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/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 [2020-12-09 06:22:02,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:22:02,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 06:22:02,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:22:02,282 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-12-09 06:22:02,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:22:02,339 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-12-09 06:22:02,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [870891169] [2020-12-09 06:22:02,340 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-12-09 06:22:02,340 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:22:02,340 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:22:02,341 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:22:02,341 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:22:03,205 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:22:03,420 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2020-12-09 06:22:03,990 WARN L197 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 118 [2020-12-09 06:22:04,340 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-12-09 06:22:04,477 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-09 06:22:04,757 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-12-09 06:22:04,906 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-12-09 06:22:05,083 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2020-12-09 06:22:05,268 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2020-12-09 06:22:05,465 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2020-12-09 06:22:05,701 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 89 [2020-12-09 06:22:05,934 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 80 [2020-12-09 06:22:05,987 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:22:05,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:22:05,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2020-12-09 06:22:05,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320702267] [2020-12-09 06:22:05,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 06:22:05,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:22:05,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 06:22:05,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-12-09 06:22:05,988 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 7 states. [2020-12-09 06:22:06,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:22:06,014 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2020-12-09 06:22:06,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 06:22:06,015 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 90 [2020-12-09 06:22:06,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:22:06,015 INFO L225 Difference]: With dead ends: 108 [2020-12-09 06:22:06,015 INFO L226 Difference]: Without dead ends: 108 [2020-12-09 06:22:06,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 244 SyntacticMatches, 11 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-12-09 06:22:06,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-09 06:22:06,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 105. [2020-12-09 06:22:06,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-09 06:22:06,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 112 transitions. [2020-12-09 06:22:06,017 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 112 transitions. Word has length 90 [2020-12-09 06:22:06,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:22:06,017 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 112 transitions. [2020-12-09 06:22:06,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 06:22:06,017 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 112 transitions. [2020-12-09 06:22:06,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-09 06:22:06,018 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:22:06,018 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 06:22:06,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable614 [2020-12-09 06:22:06,219 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:22:06,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:22:06,220 INFO L82 PathProgramCache]: Analyzing trace with hash -62568869, now seen corresponding path program 1 times [2020-12-09 06:22:06,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:22:06,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999733913] [2020-12-09 06:22:06,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:22:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:22:06,324 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-12-09 06:22:06,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999733913] [2020-12-09 06:22:06,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415143667] [2020-12-09 06:22:06,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/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 [2020-12-09 06:22:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:22:06,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 06:22:06,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:22:06,571 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-12-09 06:22:06,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:22:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-12-09 06:22:06,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1918257070] [2020-12-09 06:22:06,681 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2020-12-09 06:22:06,681 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:22:06,681 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:22:06,681 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:22:06,681 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:22:07,521 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:22:07,754 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 92 [2020-12-09 06:22:08,327 WARN L197 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 118 [2020-12-09 06:22:08,676 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-12-09 06:22:08,831 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-09 06:22:09,201 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-12-09 06:22:09,356 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-12-09 06:22:09,549 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2020-12-09 06:22:09,736 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2020-12-09 06:22:09,936 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2020-12-09 06:22:10,183 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 89 [2020-12-09 06:22:10,184 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:22:10,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:22:10,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2020-12-09 06:22:10,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566708726] [2020-12-09 06:22:10,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 06:22:10,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:22:10,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 06:22:10,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2020-12-09 06:22:10,185 INFO L87 Difference]: Start difference. First operand 105 states and 112 transitions. Second operand 8 states. [2020-12-09 06:22:10,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:22:10,273 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2020-12-09 06:22:10,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 06:22:10,274 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 90 [2020-12-09 06:22:10,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:22:10,274 INFO L225 Difference]: With dead ends: 109 [2020-12-09 06:22:10,274 INFO L226 Difference]: Without dead ends: 109 [2020-12-09 06:22:10,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 242 SyntacticMatches, 12 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-12-09 06:22:10,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-09 06:22:10,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2020-12-09 06:22:10,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-09 06:22:10,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 113 transitions. [2020-12-09 06:22:10,277 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 113 transitions. Word has length 90 [2020-12-09 06:22:10,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:22:10,277 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 113 transitions. [2020-12-09 06:22:10,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 06:22:10,277 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 113 transitions. [2020-12-09 06:22:10,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-09 06:22:10,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:22:10,278 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 3, 2, 2, 1, 1, 1, 1, 1] [2020-12-09 06:22:10,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable688 [2020-12-09 06:22:10,479 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:22:10,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:22:10,480 INFO L82 PathProgramCache]: Analyzing trace with hash 905644, now seen corresponding path program 1 times [2020-12-09 06:22:10,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:22:10,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421228906] [2020-12-09 06:22:10,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:22:10,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:22:10,688 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 108 proven. 44 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-09 06:22:10,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421228906] [2020-12-09 06:22:10,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195047598] [2020-12-09 06:22:10,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/bin/utaipan/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:22:10,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:22:10,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-09 06:22:10,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:22:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 135 proven. 17 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-09 06:22:11,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:22:11,380 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 135 proven. 17 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-09 06:22:11,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [21723761] [2020-12-09 06:22:11,381 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2020-12-09 06:22:11,381 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:22:11,381 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:22:11,381 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:22:11,382 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:22:12,277 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:22:12,512 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2020-12-09 06:22:13,184 WARN L197 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 118 [2020-12-09 06:22:13,617 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-12-09 06:22:13,832 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-09 06:22:14,417 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-12-09 06:22:14,606 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-12-09 06:22:14,844 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2020-12-09 06:22:15,084 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2020-12-09 06:22:15,330 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2020-12-09 06:22:15,631 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 89 [2020-12-09 06:22:15,632 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:22:15,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:22:15,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2020-12-09 06:22:15,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353543517] [2020-12-09 06:22:15,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-09 06:22:15,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:22:15,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-09 06:22:15,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=2520, Unknown=0, NotChecked=0, Total=3306 [2020-12-09 06:22:15,633 INFO L87 Difference]: Start difference. First operand 107 states and 113 transitions. Second operand 47 states. [2020-12-09 06:22:16,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:22:16,324 INFO L93 Difference]: Finished difference Result 125 states and 131 transitions. [2020-12-09 06:22:16,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-09 06:22:16,325 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2020-12-09 06:22:16,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:22:16,325 INFO L225 Difference]: With dead ends: 125 [2020-12-09 06:22:16,325 INFO L226 Difference]: Without dead ends: 125 [2020-12-09 06:22:16,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 223 SyntacticMatches, 10 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2368 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1409, Invalid=3993, Unknown=0, NotChecked=0, Total=5402 [2020-12-09 06:22:16,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-09 06:22:16,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 112. [2020-12-09 06:22:16,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-09 06:22:16,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 119 transitions. [2020-12-09 06:22:16,329 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 119 transitions. Word has length 92 [2020-12-09 06:22:16,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:22:16,329 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 119 transitions. [2020-12-09 06:22:16,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-09 06:22:16,329 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 119 transitions. [2020-12-09 06:22:16,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-09 06:22:16,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:22:16,329 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:22:16,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable763 [2020-12-09 06:22:16,531 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:22:16,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:22:16,531 INFO L82 PathProgramCache]: Analyzing trace with hash -619023520, now seen corresponding path program 2 times [2020-12-09 06:22:16,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:22:16,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861480807] [2020-12-09 06:22:16,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:22:16,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:22:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2020-12-09 06:22:16,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861480807] [2020-12-09 06:22:16,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:22:16,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 06:22:16,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671128270] [2020-12-09 06:22:16,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 06:22:16,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:22:16,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 06:22:16,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 06:22:16,606 INFO L87 Difference]: Start difference. First operand 112 states and 119 transitions. Second operand 4 states. [2020-12-09 06:22:16,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:22:16,632 INFO L93 Difference]: Finished difference Result 111 states and 118 transitions. [2020-12-09 06:22:16,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 06:22:16,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2020-12-09 06:22:16,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:22:16,634 INFO L225 Difference]: With dead ends: 111 [2020-12-09 06:22:16,634 INFO L226 Difference]: Without dead ends: 111 [2020-12-09 06:22:16,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 06:22:16,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-09 06:22:16,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-12-09 06:22:16,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-09 06:22:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 118 transitions. [2020-12-09 06:22:16,636 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 118 transitions. Word has length 99 [2020-12-09 06:22:16,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:22:16,636 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 118 transitions. [2020-12-09 06:22:16,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 06:22:16,636 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 118 transitions. [2020-12-09 06:22:16,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-09 06:22:16,636 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:22:16,636 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:22:16,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable839 [2020-12-09 06:22:16,637 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:22:16,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:22:16,637 INFO L82 PathProgramCache]: Analyzing trace with hash -619023519, now seen corresponding path program 1 times [2020-12-09 06:22:16,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:22:16,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265288816] [2020-12-09 06:22:16,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:22:16,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:22:16,687 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-12-09 06:22:16,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265288816] [2020-12-09 06:22:16,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064067100] [2020-12-09 06:22:16,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/bin/utaipan/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:22:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:22:16,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 06:22:16,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:22:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-12-09 06:22:16,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:22:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-12-09 06:22:16,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1515925915] [2020-12-09 06:22:16,919 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-12-09 06:22:16,919 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:22:16,919 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:22:16,919 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:22:16,919 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:22:17,814 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:22:18,048 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 86 [2020-12-09 06:22:18,618 WARN L197 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 118 [2020-12-09 06:22:18,983 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-12-09 06:22:19,144 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-09 06:22:19,489 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-12-09 06:22:19,637 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-12-09 06:22:19,826 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2020-12-09 06:22:20,022 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2020-12-09 06:22:20,228 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2020-12-09 06:22:20,495 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 89 [2020-12-09 06:22:20,746 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 80 [2020-12-09 06:22:20,799 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:22:20,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:22:20,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2020-12-09 06:22:20,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92028546] [2020-12-09 06:22:20,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-09 06:22:20,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:22:20,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-09 06:22:20,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-12-09 06:22:20,800 INFO L87 Difference]: Start difference. First operand 111 states and 118 transitions. Second operand 13 states. [2020-12-09 06:22:20,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:22:20,863 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2020-12-09 06:22:20,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 06:22:20,863 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 99 [2020-12-09 06:22:20,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:22:20,864 INFO L225 Difference]: With dead ends: 130 [2020-12-09 06:22:20,864 INFO L226 Difference]: Without dead ends: 130 [2020-12-09 06:22:20,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 268 SyntacticMatches, 11 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-12-09 06:22:20,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-09 06:22:20,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 122. [2020-12-09 06:22:20,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-12-09 06:22:20,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 134 transitions. [2020-12-09 06:22:20,866 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 134 transitions. Word has length 99 [2020-12-09 06:22:20,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:22:20,866 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 134 transitions. [2020-12-09 06:22:20,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-09 06:22:20,866 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 134 transitions. [2020-12-09 06:22:20,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-09 06:22:20,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:22:20,867 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 4, 1, 1, 1, 1, 1] [2020-12-09 06:22:21,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2020-12-09 06:22:21,068 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:22:21,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:22:21,069 INFO L82 PathProgramCache]: Analyzing trace with hash -619081881, now seen corresponding path program 2 times [2020-12-09 06:22:21,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:22:21,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669855963] [2020-12-09 06:22:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:22:21,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:22:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-12-09 06:22:21,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669855963] [2020-12-09 06:22:21,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408347656] [2020-12-09 06:22:21,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/bin/utaipan/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:22:21,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 06:22:21,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:22:21,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 06:22:21,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:22:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2020-12-09 06:22:21,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:22:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2020-12-09 06:22:21,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [589421553] [2020-12-09 06:22:21,818 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2020-12-09 06:22:21,818 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:22:21,819 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:22:21,819 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:22:21,819 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:22:22,706 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:22:22,967 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 92 [2020-12-09 06:22:23,541 WARN L197 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 118 [2020-12-09 06:22:23,903 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-12-09 06:22:24,070 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-09 06:22:24,500 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-12-09 06:22:24,680 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-12-09 06:22:24,904 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2020-12-09 06:22:25,120 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2020-12-09 06:22:25,351 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2020-12-09 06:22:25,621 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 89 [2020-12-09 06:22:25,622 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:22:25,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:22:25,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2020-12-09 06:22:25,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023668287] [2020-12-09 06:22:25,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-09 06:22:25,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:22:25,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-09 06:22:25,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2020-12-09 06:22:25,624 INFO L87 Difference]: Start difference. First operand 122 states and 134 transitions. Second operand 16 states. [2020-12-09 06:22:25,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:22:25,910 INFO L93 Difference]: Finished difference Result 121 states and 128 transitions. [2020-12-09 06:22:25,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 06:22:25,910 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 99 [2020-12-09 06:22:25,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:22:25,911 INFO L225 Difference]: With dead ends: 121 [2020-12-09 06:22:25,911 INFO L226 Difference]: Without dead ends: 121 [2020-12-09 06:22:25,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 266 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2020-12-09 06:22:25,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-09 06:22:25,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-12-09 06:22:25,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-09 06:22:25,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 128 transitions. [2020-12-09 06:22:25,913 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 128 transitions. Word has length 99 [2020-12-09 06:22:25,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:22:25,913 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 128 transitions. [2020-12-09 06:22:25,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-09 06:22:25,913 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 128 transitions. [2020-12-09 06:22:25,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-09 06:22:25,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:22:25,914 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 7, 6, 6, 1, 1, 1, 1, 1] [2020-12-09 06:22:26,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable915,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:22:26,115 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:22:26,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:22:26,115 INFO L82 PathProgramCache]: Analyzing trace with hash 873413292, now seen corresponding path program 2 times [2020-12-09 06:22:26,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:22:26,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582144976] [2020-12-09 06:22:26,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:22:26,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:22:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 108 proven. 94 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-09 06:22:26,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582144976] [2020-12-09 06:22:26,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197050360] [2020-12-09 06:22:26,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/bin/utaipan/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:22:26,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 06:22:26,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:22:26,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 06:22:26,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:22:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2020-12-09 06:22:27,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:22:27,754 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2020-12-09 06:22:27,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 06:22:27,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [19, 5] total 29 [2020-12-09 06:22:27,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993930255] [2020-12-09 06:22:27,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 06:22:27,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:22:27,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 06:22:27,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2020-12-09 06:22:27,755 INFO L87 Difference]: Start difference. First operand 121 states and 128 transitions. Second operand 7 states. [2020-12-09 06:22:27,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:22:27,948 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2020-12-09 06:22:27,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 06:22:27,949 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 104 [2020-12-09 06:22:27,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:22:27,949 INFO L225 Difference]: With dead ends: 120 [2020-12-09 06:22:27,950 INFO L226 Difference]: Without dead ends: 120 [2020-12-09 06:22:27,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2020-12-09 06:22:27,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-09 06:22:27,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-12-09 06:22:27,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-09 06:22:27,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2020-12-09 06:22:27,952 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 104 [2020-12-09 06:22:27,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:22:27,952 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2020-12-09 06:22:27,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 06:22:27,952 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2020-12-09 06:22:27,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-09 06:22:27,953 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:22:27,953 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:22:28,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable989 [2020-12-09 06:22:28,154 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:22:28,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:22:28,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1529492961, now seen corresponding path program 2 times [2020-12-09 06:22:28,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:22:28,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265719857] [2020-12-09 06:22:28,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:22:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:22:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-12-09 06:22:28,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265719857] [2020-12-09 06:22:28,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:22:28,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 06:22:28,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792725802] [2020-12-09 06:22:28,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 06:22:28,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:22:28,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 06:22:28,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 06:22:28,281 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 4 states. [2020-12-09 06:22:28,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:22:28,319 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2020-12-09 06:22:28,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 06:22:28,320 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 117 [2020-12-09 06:22:28,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:22:28,321 INFO L225 Difference]: With dead ends: 122 [2020-12-09 06:22:28,321 INFO L226 Difference]: Without dead ends: 122 [2020-12-09 06:22:28,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 06:22:28,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-09 06:22:28,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-12-09 06:22:28,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-12-09 06:22:28,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2020-12-09 06:22:28,323 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 117 [2020-12-09 06:22:28,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:22:28,323 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2020-12-09 06:22:28,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 06:22:28,323 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2020-12-09 06:22:28,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-09 06:22:28,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:22:28,324 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:22:28,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable990 [2020-12-09 06:22:28,324 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:22:28,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:22:28,325 INFO L82 PathProgramCache]: Analyzing trace with hash 963946492, now seen corresponding path program 1 times [2020-12-09 06:22:28,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:22:28,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084499360] [2020-12-09 06:22:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:22:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:22:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-12-09 06:22:28,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084499360] [2020-12-09 06:22:28,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412037560] [2020-12-09 06:22:28,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/bin/utaipan/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:22:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:22:28,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-09 06:22:28,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:22:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 135 proven. 12 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-12-09 06:22:28,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:22:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 135 proven. 12 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-12-09 06:22:29,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1599783162] [2020-12-09 06:22:29,153 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-12-09 06:22:29,153 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:22:29,153 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:22:29,153 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:22:29,153 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:22:30,172 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:22:30,475 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 89 [2020-12-09 06:22:31,169 WARN L197 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 118 [2020-12-09 06:22:31,598 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-12-09 06:22:31,815 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-09 06:22:32,419 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-12-09 06:22:32,628 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-12-09 06:22:32,891 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2020-12-09 06:22:33,138 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2020-12-09 06:22:33,388 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2020-12-09 06:22:33,691 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 89 [2020-12-09 06:22:33,998 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2020-12-09 06:22:34,331 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 83 [2020-12-09 06:22:34,332 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:22:34,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:22:34,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 14, 14] total 31 [2020-12-09 06:22:34,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14815252] [2020-12-09 06:22:34,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-09 06:22:34,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:22:34,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-09 06:22:34,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1587, Unknown=0, NotChecked=0, Total=2070 [2020-12-09 06:22:34,334 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 33 states. [2020-12-09 06:22:34,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:22:34,825 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2020-12-09 06:22:34,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-09 06:22:34,826 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 119 [2020-12-09 06:22:34,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:22:34,827 INFO L225 Difference]: With dead ends: 132 [2020-12-09 06:22:34,827 INFO L226 Difference]: Without dead ends: 132 [2020-12-09 06:22:34,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 304 SyntacticMatches, 10 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=916, Invalid=2624, Unknown=0, NotChecked=0, Total=3540 [2020-12-09 06:22:34,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-09 06:22:34,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2020-12-09 06:22:34,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-09 06:22:34,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 134 transitions. [2020-12-09 06:22:34,830 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 134 transitions. Word has length 119 [2020-12-09 06:22:34,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:22:34,830 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 134 transitions. [2020-12-09 06:22:34,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-09 06:22:34,830 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 134 transitions. [2020-12-09 06:22:34,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-09 06:22:34,831 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:22:34,831 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:22:35,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable991,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:22:35,032 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:22:35,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:22:35,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1360329889, now seen corresponding path program 1 times [2020-12-09 06:22:35,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:22:35,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762483053] [2020-12-09 06:22:35,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:22:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:22:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2020-12-09 06:22:35,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762483053] [2020-12-09 06:22:35,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:22:35,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 06:22:35,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786517853] [2020-12-09 06:22:35,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 06:22:35,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:22:35,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 06:22:35,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 06:22:35,113 INFO L87 Difference]: Start difference. First operand 128 states and 134 transitions. Second operand 3 states. [2020-12-09 06:22:35,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:22:35,126 INFO L93 Difference]: Finished difference Result 127 states and 133 transitions. [2020-12-09 06:22:35,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 06:22:35,127 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2020-12-09 06:22:35,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:22:35,127 INFO L225 Difference]: With dead ends: 127 [2020-12-09 06:22:35,127 INFO L226 Difference]: Without dead ends: 126 [2020-12-09 06:22:35,128 INFO L677 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 [2020-12-09 06:22:35,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-09 06:22:35,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-12-09 06:22:35,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-09 06:22:35,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2020-12-09 06:22:35,130 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 121 [2020-12-09 06:22:35,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:22:35,130 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2020-12-09 06:22:35,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 06:22:35,130 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2020-12-09 06:22:35,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-09 06:22:35,130 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:22:35,130 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 4, 1, 1, 1, 1, 1, 1] [2020-12-09 06:22:35,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1076 [2020-12-09 06:22:35,131 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:22:35,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:22:35,131 INFO L82 PathProgramCache]: Analyzing trace with hash 966663629, now seen corresponding path program 2 times [2020-12-09 06:22:35,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:22:35,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286468227] [2020-12-09 06:22:35,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:22:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:22:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-12-09 06:22:35,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286468227] [2020-12-09 06:22:35,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941429451] [2020-12-09 06:22:35,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/bin/utaipan/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:22:35,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 06:22:35,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:22:35,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 06:22:35,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:22:35,496 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2020-12-09 06:22:35,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:22:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2020-12-09 06:22:35,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 06:22:35,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 15 [2020-12-09 06:22:35,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865363290] [2020-12-09 06:22:35,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 06:22:35,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:22:35,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 06:22:35,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-12-09 06:22:35,717 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 6 states. [2020-12-09 06:22:35,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:22:35,812 INFO L93 Difference]: Finished difference Result 125 states and 129 transitions. [2020-12-09 06:22:35,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 06:22:35,813 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2020-12-09 06:22:35,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:22:35,813 INFO L225 Difference]: With dead ends: 125 [2020-12-09 06:22:35,813 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 06:22:35,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2020-12-09 06:22:35,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 06:22:35,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 06:22:35,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 06:22:35,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 06:22:35,814 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 125 [2020-12-09 06:22:35,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:22:35,814 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 06:22:35,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 06:22:35,814 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 06:22:35,814 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 06:22:36,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1077 [2020-12-09 06:22:36,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 06:22:36 BoogieIcfgContainer [2020-12-09 06:22:36,026 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 06:22:36,027 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 06:22:36,027 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 06:22:36,028 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 06:22:36,028 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:21:15" (3/4) ... [2020-12-09 06:22:36,035 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 06:22:36,053 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 23 nodes and edges [2020-12-09 06:22:36,053 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-12-09 06:22:36,053 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 06:22:36,054 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 06:22:36,081 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_8eb03b3e-d733-4e80-853e-d89ccb082e9b/bin/utaipan/witness.graphml [2020-12-09 06:22:36,081 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 06:22:36,082 INFO L168 Benchmark]: Toolchain (without parser) took 81070.38 ms. Allocated memory was 113.2 MB in the beginning and 197.1 MB in the end (delta: 83.9 MB). Free memory was 92.8 MB in the beginning and 87.0 MB in the end (delta: 5.8 MB). Peak memory consumption was 89.8 MB. Max. memory is 16.1 GB. [2020-12-09 06:22:36,082 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 83.9 MB. Free memory is still 60.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 06:22:36,082 INFO L168 Benchmark]: CACSL2BoogieTranslator took 162.42 ms. Allocated memory is still 113.2 MB. Free memory was 92.4 MB in the beginning and 82.6 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 06:22:36,082 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.33 ms. Allocated memory is still 113.2 MB. Free memory was 82.6 MB in the beginning and 81.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 06:22:36,082 INFO L168 Benchmark]: Boogie Preprocessor took 20.29 ms. Allocated memory is still 113.2 MB. Free memory was 81.0 MB in the beginning and 79.3 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 06:22:36,082 INFO L168 Benchmark]: RCFGBuilder took 439.05 ms. Allocated memory is still 113.2 MB. Free memory was 79.3 MB in the beginning and 88.6 MB in the end (delta: -9.3 MB). Peak memory consumption was 38.2 MB. Max. memory is 16.1 GB. [2020-12-09 06:22:36,082 INFO L168 Benchmark]: TraceAbstraction took 80361.78 ms. Allocated memory was 113.2 MB in the beginning and 197.1 MB in the end (delta: 83.9 MB). Free memory was 88.0 MB in the beginning and 89.9 MB in the end (delta: -1.9 MB). Peak memory consumption was 83.0 MB. Max. memory is 16.1 GB. [2020-12-09 06:22:36,083 INFO L168 Benchmark]: Witness Printer took 54.38 ms. Allocated memory is still 197.1 MB. Free memory was 89.9 MB in the beginning and 87.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 06:22:36,083 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 83.9 MB. Free memory is still 60.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 162.42 ms. Allocated memory is still 113.2 MB. Free memory was 92.4 MB in the beginning and 82.6 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 27.33 ms. Allocated memory is still 113.2 MB. Free memory was 82.6 MB in the beginning and 81.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.29 ms. Allocated memory is still 113.2 MB. Free memory was 81.0 MB in the beginning and 79.3 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 439.05 ms. Allocated memory is still 113.2 MB. Free memory was 79.3 MB in the beginning and 88.6 MB in the end (delta: -9.3 MB). Peak memory consumption was 38.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 80361.78 ms. Allocated memory was 113.2 MB in the beginning and 197.1 MB in the end (delta: 83.9 MB). Free memory was 88.0 MB in the beginning and 89.9 MB in the end (delta: -1.9 MB). Peak memory consumption was 83.0 MB. Max. memory is 16.1 GB. * Witness Printer took 54.38 ms. Allocated memory is still 197.1 MB. Free memory was 89.9 MB in the beginning and 87.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 38]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 9]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 38]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 9]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 38]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 47]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 19]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 43]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 47]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 19]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 38]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 19]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 28]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 28]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 19]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 28]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 28]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 17 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 17 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 80.3s, OverallIterations: 38, TraceHistogramMax: 10, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 564 SDtfs, 4157 SDslu, 1262 SDs, 0 SdLazy, 3714 SolverSat, 492 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4313 GetRequests, 3408 SyntacticMatches, 180 SemanticMatches, 725 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11397 ImplicationChecksByTransitivity, 48.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=128occurred in iteration=36, 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, 38 MinimizatonAttempts, 206 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 14.0s InterpolantComputationTime, 3716 NumberOfCodeBlocks, 3159 NumberOfCodeBlocksAsserted, 68 NumberOfCheckSat, 5090 ConstructedInterpolants, 378 QuantifiedInterpolants, 4364694 SizeOfPredicates, 119 NumberOfNonLiveVariables, 5367 ConjunctsInSsa, 282 ConjunctsInUnsatCore, 88 InterpolantComputations, 21 PerfectInterpolantSequences, 20096/21268 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME[ms]: 568, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 6, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 12, TOOLS_POST_TIME[ms]: 356, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 12, TOOLS_QUANTIFIERELIM_TIME[ms]: 353, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 204, FLUID_QUERY_TIME[ms]: 1, FLUID_QUERIES: 26, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 2, DOMAIN_JOIN_TIME[ms]: 63, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 121, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME[ms]: 9, DOMAIN_ISBOTTOM_APPLICATIONS: 6, DOMAIN_ISBOTTOM_TIME[ms]: 13, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 272, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 272, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 0, PATH_EXPR_TIME[ms]: 0, REGEX_TO_DAG_TIME[ms]: 0, DAG_COMPRESSION_TIME[ms]: 2, DAG_COMPRESSION_PROCESSED_NODES: 53, DAG_COMPRESSION_RETAINED_NODES: 20, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...