./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_33f90220-b425-400b-a558-88e26b3e9a32/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_33f90220-b425-400b-a558-88e26b3e9a32/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_33f90220-b425-400b-a558-88e26b3e9a32/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_33f90220-b425-400b-a558-88e26b3e9a32/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_33f90220-b425-400b-a558-88e26b3e9a32/bin/utaipan/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_33f90220-b425-400b-a558-88e26b3e9a32/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 573d04c3ab16ffed1ccac6c6179d92b670a825d7 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 14:57:01,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 14:57:01,469 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 14:57:01,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 14:57:01,477 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 14:57:01,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 14:57:01,478 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 14:57:01,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 14:57:01,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 14:57:01,482 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 14:57:01,482 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 14:57:01,483 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 14:57:01,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 14:57:01,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 14:57:01,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 14:57:01,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 14:57:01,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 14:57:01,486 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 14:57:01,488 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 14:57:01,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 14:57:01,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 14:57:01,491 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 14:57:01,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 14:57:01,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 14:57:01,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 14:57:01,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 14:57:01,494 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 14:57:01,495 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 14:57:01,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 14:57:01,495 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 14:57:01,496 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 14:57:01,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 14:57:01,496 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 14:57:01,497 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 14:57:01,497 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 14:57:01,497 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 14:57:01,498 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 14:57:01,498 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 14:57:01,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 14:57:01,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 14:57:01,499 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 14:57:01,499 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_33f90220-b425-400b-a558-88e26b3e9a32/bin/utaipan/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2019-12-07 14:57:01,510 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 14:57:01,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 14:57:01,510 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 14:57:01,511 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 14:57:01,511 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 14:57:01,511 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 14:57:01,511 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 14:57:01,511 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 14:57:01,511 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 14:57:01,511 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 14:57:01,511 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 14:57:01,512 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 14:57:01,512 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 14:57:01,512 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 14:57:01,512 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 14:57:01,512 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 14:57:01,513 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 14:57:01,513 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 14:57:01,513 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 14:57:01,513 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 14:57:01,513 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 14:57:01,513 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 14:57:01,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 14:57:01,513 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-12-07 14:57:01,513 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-12-07 14:57:01,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 14:57:01,514 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 14:57:01,514 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 14:57:01,514 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 14:57:01,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 14:57:01,514 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 14:57:01,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 14:57:01,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 14:57:01,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 14:57:01,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 14:57:01,515 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 14:57:01,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 14:57:01,515 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 14:57:01,515 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 14:57:01,515 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_33f90220-b425-400b-a558-88e26b3e9a32/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-memcleanup) ) 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 -> 573d04c3ab16ffed1ccac6c6179d92b670a825d7 [2019-12-07 14:57:01,617 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 14:57:01,625 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 14:57:01,628 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 14:57:01,629 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 14:57:01,629 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 14:57:01,630 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_33f90220-b425-400b-a558-88e26b3e9a32/bin/utaipan/../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2019-12-07 14:57:01,669 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_33f90220-b425-400b-a558-88e26b3e9a32/bin/utaipan/data/19dbc5cd7/e55f3279b8d149daad29d556a8a86fd6/FLAG9d8b0247f [2019-12-07 14:57:02,119 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 14:57:02,119 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_33f90220-b425-400b-a558-88e26b3e9a32/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2019-12-07 14:57:02,128 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_33f90220-b425-400b-a558-88e26b3e9a32/bin/utaipan/data/19dbc5cd7/e55f3279b8d149daad29d556a8a86fd6/FLAG9d8b0247f [2019-12-07 14:57:02,136 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_33f90220-b425-400b-a558-88e26b3e9a32/bin/utaipan/data/19dbc5cd7/e55f3279b8d149daad29d556a8a86fd6 [2019-12-07 14:57:02,138 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 14:57:02,139 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 14:57:02,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 14:57:02,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 14:57:02,142 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 14:57:02,142 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 02:57:02" (1/1) ... [2019-12-07 14:57:02,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@247d07ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:57:02, skipping insertion in model container [2019-12-07 14:57:02,144 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 02:57:02" (1/1) ... [2019-12-07 14:57:02,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 14:57:02,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 14:57:02,394 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 14:57:02,402 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 14:57:02,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 14:57:02,466 INFO L208 MainTranslator]: Completed translation [2019-12-07 14:57:02,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:57:02 WrapperNode [2019-12-07 14:57:02,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 14:57:02,467 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 14:57:02,467 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 14:57:02,467 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 14:57:02,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:57:02" (1/1) ... [2019-12-07 14:57:02,482 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:57:02" (1/1) ... [2019-12-07 14:57:02,499 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 14:57:02,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 14:57:02,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 14:57:02,499 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 14:57:02,505 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:57:02" (1/1) ... [2019-12-07 14:57:02,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:57:02" (1/1) ... [2019-12-07 14:57:02,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:57:02" (1/1) ... [2019-12-07 14:57:02,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:57:02" (1/1) ... [2019-12-07 14:57:02,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:57:02" (1/1) ... [2019-12-07 14:57:02,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:57:02" (1/1) ... [2019-12-07 14:57:02,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:57:02" (1/1) ... [2019-12-07 14:57:02,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 14:57:02,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 14:57:02,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 14:57:02,520 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 14:57:02,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:57:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_33f90220-b425-400b-a558-88e26b3e9a32/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 14:57:02,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 14:57:02,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 14:57:02,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 14:57:02,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-12-07 14:57:02,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-12-07 14:57:02,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 14:57:02,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 14:57:02,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 14:57:02,877 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 14:57:02,877 INFO L287 CfgBuilder]: Removed 11 assume(true) statements. [2019-12-07 14:57:02,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:57:02 BoogieIcfgContainer [2019-12-07 14:57:02,878 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 14:57:02,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 14:57:02,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 14:57:02,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 14:57:02,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 02:57:02" (1/3) ... [2019-12-07 14:57:02,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ecbd394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 02:57:02, skipping insertion in model container [2019-12-07 14:57:02,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:57:02" (2/3) ... [2019-12-07 14:57:02,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ecbd394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 02:57:02, skipping insertion in model container [2019-12-07 14:57:02,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:57:02" (3/3) ... [2019-12-07 14:57:02,882 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2019-12-07 14:57:02,888 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 14:57:02,893 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 35 error locations. [2019-12-07 14:57:02,901 INFO L249 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2019-12-07 14:57:02,913 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 14:57:02,913 INFO L374 AbstractCegarLoop]: Hoare is false [2019-12-07 14:57:02,913 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 14:57:02,913 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 14:57:02,913 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 14:57:02,913 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 14:57:02,913 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 14:57:02,913 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 14:57:02,924 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states. [2019-12-07 14:57:02,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-12-07 14:57:02,929 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:57:02,930 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-12-07 14:57:02,930 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2019-12-07 14:57:02,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:57:02,934 INFO L82 PathProgramCache]: Analyzing trace with hash 201781, now seen corresponding path program 1 times [2019-12-07 14:57:02,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:57:02,940 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903049765] [2019-12-07 14:57:02,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:57:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:57:03,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:57:03,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903049765] [2019-12-07 14:57:03,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:57:03,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 14:57:03,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061547952] [2019-12-07 14:57:03,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 14:57:03,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 14:57:03,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 14:57:03,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 14:57:03,054 INFO L87 Difference]: Start difference. First operand 72 states. Second operand 3 states. [2019-12-07 14:57:03,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:57:03,081 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2019-12-07 14:57:03,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 14:57:03,083 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-12-07 14:57:03,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:57:03,090 INFO L225 Difference]: With dead ends: 95 [2019-12-07 14:57:03,090 INFO L226 Difference]: Without dead ends: 92 [2019-12-07 14:57:03,091 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 14:57:03,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-12-07 14:57:03,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2019-12-07 14:57:03,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-07 14:57:03,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2019-12-07 14:57:03,116 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 3 [2019-12-07 14:57:03,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:57:03,116 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2019-12-07 14:57:03,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 14:57:03,116 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2019-12-07 14:57:03,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 14:57:03,116 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:57:03,116 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 14:57:03,117 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2019-12-07 14:57:03,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:57:03,117 INFO L82 PathProgramCache]: Analyzing trace with hash 6088482, now seen corresponding path program 1 times [2019-12-07 14:57:03,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:57:03,117 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398854174] [2019-12-07 14:57:03,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:57:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:57:03,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:57:03,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398854174] [2019-12-07 14:57:03,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:57:03,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 14:57:03,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386904327] [2019-12-07 14:57:03,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 14:57:03,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 14:57:03,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 14:57:03,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 14:57:03,139 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 3 states. [2019-12-07 14:57:03,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:57:03,208 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2019-12-07 14:57:03,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 14:57:03,208 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-12-07 14:57:03,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:57:03,209 INFO L225 Difference]: With dead ends: 93 [2019-12-07 14:57:03,209 INFO L226 Difference]: Without dead ends: 93 [2019-12-07 14:57:03,210 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 14:57:03,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-12-07 14:57:03,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 66. [2019-12-07 14:57:03,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-12-07 14:57:03,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2019-12-07 14:57:03,215 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 4 [2019-12-07 14:57:03,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:57:03,215 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2019-12-07 14:57:03,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 14:57:03,215 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2019-12-07 14:57:03,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 14:57:03,216 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:57:03,216 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 14:57:03,216 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2019-12-07 14:57:03,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:57:03,216 INFO L82 PathProgramCache]: Analyzing trace with hash 6088483, now seen corresponding path program 1 times [2019-12-07 14:57:03,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:57:03,216 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931438313] [2019-12-07 14:57:03,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:57:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:57:03,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:57:03,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931438313] [2019-12-07 14:57:03,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:57:03,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 14:57:03,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172565940] [2019-12-07 14:57:03,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 14:57:03,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 14:57:03,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 14:57:03,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 14:57:03,248 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 3 states. [2019-12-07 14:57:03,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:57:03,290 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2019-12-07 14:57:03,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 14:57:03,290 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-12-07 14:57:03,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:57:03,291 INFO L225 Difference]: With dead ends: 61 [2019-12-07 14:57:03,291 INFO L226 Difference]: Without dead ends: 61 [2019-12-07 14:57:03,291 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 14:57:03,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-12-07 14:57:03,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-12-07 14:57:03,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-12-07 14:57:03,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2019-12-07 14:57:03,295 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 4 [2019-12-07 14:57:03,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:57:03,295 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2019-12-07 14:57:03,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 14:57:03,295 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2019-12-07 14:57:03,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 14:57:03,296 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:57:03,296 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:57:03,296 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2019-12-07 14:57:03,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:57:03,296 INFO L82 PathProgramCache]: Analyzing trace with hash 568646588, now seen corresponding path program 1 times [2019-12-07 14:57:03,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:57:03,296 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732231119] [2019-12-07 14:57:03,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:57:03,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:57:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:57:03,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732231119] [2019-12-07 14:57:03,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:57:03,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 14:57:03,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498468156] [2019-12-07 14:57:03,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 14:57:03,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 14:57:03,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 14:57:03,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 14:57:03,337 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 3 states. [2019-12-07 14:57:03,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:57:03,350 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2019-12-07 14:57:03,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 14:57:03,350 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-12-07 14:57:03,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:57:03,351 INFO L225 Difference]: With dead ends: 69 [2019-12-07 14:57:03,351 INFO L226 Difference]: Without dead ends: 69 [2019-12-07 14:57:03,351 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 14:57:03,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-07 14:57:03,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-12-07 14:57:03,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-12-07 14:57:03,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2019-12-07 14:57:03,355 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 10 [2019-12-07 14:57:03,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:57:03,355 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2019-12-07 14:57:03,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 14:57:03,355 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2019-12-07 14:57:03,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 14:57:03,356 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:57:03,356 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:57:03,356 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2019-12-07 14:57:03,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:57:03,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1008683973, now seen corresponding path program 1 times [2019-12-07 14:57:03,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:57:03,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195114066] [2019-12-07 14:57:03,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:57:03,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:57:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:57:03,392 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195114066] [2019-12-07 14:57:03,392 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695505152] [2019-12-07 14:57:03,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_33f90220-b425-400b-a558-88e26b3e9a32/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:57:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:57:03,433 INFO L264 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 14:57:03,436 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:57:03,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:57:03,452 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 14:57:03,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:57:03,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [890871787] [2019-12-07 14:57:03,478 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-12-07 14:57:03,478 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 14:57:03,482 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 14:57:03,486 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 14:57:03,487 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 14:57:03,577 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:03,775 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:05,390 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 14:57:05,860 WARN L192 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2019-12-07 14:57:06,072 WARN L192 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2019-12-07 14:57:06,349 WARN L192 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2019-12-07 14:57:06,800 WARN L192 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2019-12-07 14:57:07,177 WARN L192 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 71 [2019-12-07 14:57:07,231 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:57:07,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 14:57:07,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2019-12-07 14:57:07,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931503161] [2019-12-07 14:57:07,232 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 14:57:07,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 14:57:07,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 14:57:07,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-07 14:57:07,233 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand 7 states. [2019-12-07 14:57:07,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:57:07,256 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2019-12-07 14:57:07,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 14:57:07,256 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-12-07 14:57:07,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:57:07,257 INFO L225 Difference]: With dead ends: 94 [2019-12-07 14:57:07,257 INFO L226 Difference]: Without dead ends: 94 [2019-12-07 14:57:07,258 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-07 14:57:07,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-12-07 14:57:07,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2019-12-07 14:57:07,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-12-07 14:57:07,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 104 transitions. [2019-12-07 14:57:07,262 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 104 transitions. Word has length 12 [2019-12-07 14:57:07,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:57:07,262 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 104 transitions. [2019-12-07 14:57:07,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 14:57:07,263 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 104 transitions. [2019-12-07 14:57:07,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-07 14:57:07,263 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:57:07,263 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2019-12-07 14:57:07,464 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:57:07,464 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2019-12-07 14:57:07,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:57:07,465 INFO L82 PathProgramCache]: Analyzing trace with hash 496370220, now seen corresponding path program 1 times [2019-12-07 14:57:07,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:57:07,466 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763745905] [2019-12-07 14:57:07,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:57:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:57:07,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:57:07,532 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763745905] [2019-12-07 14:57:07,532 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569594654] [2019-12-07 14:57:07,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_33f90220-b425-400b-a558-88e26b3e9a32/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:57:07,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:57:07,568 INFO L264 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 14:57:07,569 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:57:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:57:07,598 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 14:57:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:57:07,611 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1013978247] [2019-12-07 14:57:07,612 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-12-07 14:57:07,612 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 14:57:07,613 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 14:57:07,613 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 14:57:07,613 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 14:57:07,654 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:07,749 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:08,898 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:09,274 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 14:57:09,621 WARN L192 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 75 [2019-12-07 14:57:10,034 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2019-12-07 14:57:10,492 WARN L192 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2019-12-07 14:57:10,967 WARN L192 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2019-12-07 14:57:11,345 WARN L192 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2019-12-07 14:57:11,665 WARN L192 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2019-12-07 14:57:12,020 WARN L192 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 71 [2019-12-07 14:57:12,372 WARN L192 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 72 [2019-12-07 14:57:12,373 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:57:12,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 14:57:12,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2019-12-07 14:57:12,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084778624] [2019-12-07 14:57:12,374 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 14:57:12,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 14:57:12,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 14:57:12,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-07 14:57:12,374 INFO L87 Difference]: Start difference. First operand 90 states and 104 transitions. Second operand 7 states. [2019-12-07 14:57:12,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:57:12,520 INFO L93 Difference]: Finished difference Result 116 states and 130 transitions. [2019-12-07 14:57:12,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 14:57:12,521 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-12-07 14:57:12,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:57:12,523 INFO L225 Difference]: With dead ends: 116 [2019-12-07 14:57:12,523 INFO L226 Difference]: Without dead ends: 116 [2019-12-07 14:57:12,524 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-07 14:57:12,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-12-07 14:57:12,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 89. [2019-12-07 14:57:12,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-07 14:57:12,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2019-12-07 14:57:12,537 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 19 [2019-12-07 14:57:12,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:57:12,537 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2019-12-07 14:57:12,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 14:57:12,538 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2019-12-07 14:57:12,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-07 14:57:12,539 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:57:12,539 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2019-12-07 14:57:12,740 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:57:12,741 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2019-12-07 14:57:12,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:57:12,741 INFO L82 PathProgramCache]: Analyzing trace with hash 496370221, now seen corresponding path program 1 times [2019-12-07 14:57:12,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:57:12,741 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956541100] [2019-12-07 14:57:12,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:57:12,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:57:12,803 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:57:12,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956541100] [2019-12-07 14:57:12,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593864337] [2019-12-07 14:57:12,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_33f90220-b425-400b-a558-88e26b3e9a32/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:57:12,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:57:12,839 INFO L264 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 14:57:12,840 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:57:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:57:12,906 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 14:57:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:57:12,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1597039122] [2019-12-07 14:57:12,998 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-12-07 14:57:12,998 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 14:57:12,998 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 14:57:12,998 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 14:57:12,998 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 14:57:13,021 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:13,129 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:13,573 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:13,990 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:14,375 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 14:57:14,681 WARN L192 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 75 [2019-12-07 14:57:15,111 WARN L192 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2019-12-07 14:57:15,318 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2019-12-07 14:57:15,586 WARN L192 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2019-12-07 14:57:15,941 WARN L192 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2019-12-07 14:57:16,389 WARN L192 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 71 [2019-12-07 14:57:16,836 WARN L192 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 72 [2019-12-07 14:57:16,837 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:57:16,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 14:57:16,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 7] total 12 [2019-12-07 14:57:16,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954538740] [2019-12-07 14:57:16,838 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 14:57:16,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 14:57:16,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 14:57:16,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2019-12-07 14:57:16,838 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 13 states. [2019-12-07 14:57:16,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:57:16,901 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2019-12-07 14:57:16,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 14:57:16,902 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2019-12-07 14:57:16,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:57:16,902 INFO L225 Difference]: With dead ends: 88 [2019-12-07 14:57:16,902 INFO L226 Difference]: Without dead ends: 88 [2019-12-07 14:57:16,903 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2019-12-07 14:57:16,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-12-07 14:57:16,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-12-07 14:57:16,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-07 14:57:16,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2019-12-07 14:57:16,908 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 19 [2019-12-07 14:57:16,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:57:16,908 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2019-12-07 14:57:16,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 14:57:16,909 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2019-12-07 14:57:16,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-07 14:57:16,909 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:57:16,909 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2019-12-07 14:57:17,110 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:57:17,111 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2019-12-07 14:57:17,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:57:17,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1197369291, now seen corresponding path program 2 times [2019-12-07 14:57:17,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:57:17,112 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796505427] [2019-12-07 14:57:17,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:57:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:57:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-12-07 14:57:17,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796505427] [2019-12-07 14:57:17,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926861449] [2019-12-07 14:57:17,179 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_33f90220-b425-400b-a558-88e26b3e9a32/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:57:17,213 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-07 14:57:17,213 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:57:17,214 INFO L264 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-07 14:57:17,215 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:57:17,252 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-12-07 14:57:17,252 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 14:57:17,255 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-12-07 14:57:17,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-12-07 14:57:17,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 8 [2019-12-07 14:57:17,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995235048] [2019-12-07 14:57:17,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 14:57:17,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 14:57:17,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 14:57:17,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-12-07 14:57:17,257 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand 5 states. [2019-12-07 14:57:17,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:57:17,359 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2019-12-07 14:57:17,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 14:57:17,359 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2019-12-07 14:57:17,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:57:17,359 INFO L225 Difference]: With dead ends: 116 [2019-12-07 14:57:17,360 INFO L226 Difference]: Without dead ends: 116 [2019-12-07 14:57:17,360 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-12-07 14:57:17,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-12-07 14:57:17,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 88. [2019-12-07 14:57:17,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-07 14:57:17,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2019-12-07 14:57:17,363 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 39 [2019-12-07 14:57:17,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:57:17,363 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2019-12-07 14:57:17,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 14:57:17,364 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2019-12-07 14:57:17,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-07 14:57:17,364 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:57:17,364 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2019-12-07 14:57:17,565 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:57:17,565 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2019-12-07 14:57:17,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:57:17,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1197369292, now seen corresponding path program 1 times [2019-12-07 14:57:17,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:57:17,566 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069004256] [2019-12-07 14:57:17,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:57:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:57:17,616 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-12-07 14:57:17,617 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069004256] [2019-12-07 14:57:17,617 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756186216] [2019-12-07 14:57:17,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_33f90220-b425-400b-a558-88e26b3e9a32/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:57:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:57:17,663 INFO L264 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 14:57:17,665 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:57:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:57:17,692 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 14:57:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:57:17,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2098441685] [2019-12-07 14:57:17,718 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-12-07 14:57:17,718 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 14:57:17,718 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 14:57:17,718 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 14:57:17,718 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 14:57:17,743 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:17,839 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:18,917 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:19,301 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 14:57:19,873 WARN L192 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2019-12-07 14:57:20,189 WARN L192 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2019-12-07 14:57:20,445 WARN L192 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2019-12-07 14:57:20,818 WARN L192 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2019-12-07 14:57:21,193 WARN L192 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 71 [2019-12-07 14:57:21,270 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:57:21,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 14:57:21,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2019-12-07 14:57:21,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416982493] [2019-12-07 14:57:21,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 14:57:21,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 14:57:21,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 14:57:21,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2019-12-07 14:57:21,272 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand 10 states. [2019-12-07 14:57:21,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:57:21,465 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2019-12-07 14:57:21,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 14:57:21,465 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2019-12-07 14:57:21,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:57:21,466 INFO L225 Difference]: With dead ends: 98 [2019-12-07 14:57:21,466 INFO L226 Difference]: Without dead ends: 98 [2019-12-07 14:57:21,467 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2019-12-07 14:57:21,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-12-07 14:57:21,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-12-07 14:57:21,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-07 14:57:21,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2019-12-07 14:57:21,471 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 39 [2019-12-07 14:57:21,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:57:21,471 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2019-12-07 14:57:21,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 14:57:21,472 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2019-12-07 14:57:21,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-07 14:57:21,473 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:57:21,473 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1] [2019-12-07 14:57:21,673 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:57:21,674 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2019-12-07 14:57:21,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:57:21,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1337319924, now seen corresponding path program 1 times [2019-12-07 14:57:21,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:57:21,675 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644574596] [2019-12-07 14:57:21,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:57:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:57:21,747 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-12-07 14:57:21,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644574596] [2019-12-07 14:57:21,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:57:21,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 14:57:21,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347347674] [2019-12-07 14:57:21,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 14:57:21,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 14:57:21,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 14:57:21,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 14:57:21,748 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand 5 states. [2019-12-07 14:57:21,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:57:21,834 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2019-12-07 14:57:21,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 14:57:21,834 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2019-12-07 14:57:21,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:57:21,835 INFO L225 Difference]: With dead ends: 112 [2019-12-07 14:57:21,835 INFO L226 Difference]: Without dead ends: 112 [2019-12-07 14:57:21,836 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-07 14:57:21,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-12-07 14:57:21,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 92. [2019-12-07 14:57:21,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-12-07 14:57:21,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2019-12-07 14:57:21,838 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 52 [2019-12-07 14:57:21,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:57:21,838 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2019-12-07 14:57:21,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 14:57:21,838 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2019-12-07 14:57:21,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-12-07 14:57:21,840 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:57:21,840 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2019-12-07 14:57:21,840 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2019-12-07 14:57:21,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:57:21,840 INFO L82 PathProgramCache]: Analyzing trace with hash 969226710, now seen corresponding path program 1 times [2019-12-07 14:57:21,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:57:21,840 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535822022] [2019-12-07 14:57:21,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:57:21,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:57:21,893 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-12-07 14:57:21,894 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535822022] [2019-12-07 14:57:21,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:57:21,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 14:57:21,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797886554] [2019-12-07 14:57:21,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 14:57:21,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 14:57:21,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 14:57:21,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-12-07 14:57:21,894 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand 6 states. [2019-12-07 14:57:21,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:57:21,963 INFO L93 Difference]: Finished difference Result 123 states and 138 transitions. [2019-12-07 14:57:21,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 14:57:21,963 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2019-12-07 14:57:21,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:57:21,964 INFO L225 Difference]: With dead ends: 123 [2019-12-07 14:57:21,964 INFO L226 Difference]: Without dead ends: 123 [2019-12-07 14:57:21,964 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-12-07 14:57:21,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-12-07 14:57:21,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2019-12-07 14:57:21,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-12-07 14:57:21,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 121 transitions. [2019-12-07 14:57:21,967 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 121 transitions. Word has length 54 [2019-12-07 14:57:21,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:57:21,967 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 121 transitions. [2019-12-07 14:57:21,967 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 14:57:21,967 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 121 transitions. [2019-12-07 14:57:21,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-12-07 14:57:21,968 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:57:21,968 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:57:21,968 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2019-12-07 14:57:21,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:57:21,969 INFO L82 PathProgramCache]: Analyzing trace with hash -18743565, now seen corresponding path program 1 times [2019-12-07 14:57:21,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:57:21,969 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152487673] [2019-12-07 14:57:21,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:57:21,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:57:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-12-07 14:57:22,027 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152487673] [2019-12-07 14:57:22,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:57:22,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-12-07 14:57:22,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971048480] [2019-12-07 14:57:22,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 14:57:22,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 14:57:22,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 14:57:22,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-12-07 14:57:22,028 INFO L87 Difference]: Start difference. First operand 104 states and 121 transitions. Second operand 7 states. [2019-12-07 14:57:22,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:57:22,145 INFO L93 Difference]: Finished difference Result 118 states and 133 transitions. [2019-12-07 14:57:22,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 14:57:22,145 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2019-12-07 14:57:22,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:57:22,146 INFO L225 Difference]: With dead ends: 118 [2019-12-07 14:57:22,146 INFO L226 Difference]: Without dead ends: 118 [2019-12-07 14:57:22,146 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-12-07 14:57:22,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-12-07 14:57:22,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 109. [2019-12-07 14:57:22,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-12-07 14:57:22,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2019-12-07 14:57:22,148 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 55 [2019-12-07 14:57:22,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:57:22,148 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2019-12-07 14:57:22,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 14:57:22,148 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2019-12-07 14:57:22,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-12-07 14:57:22,149 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:57:22,149 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:57:22,149 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2019-12-07 14:57:22,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:57:22,150 INFO L82 PathProgramCache]: Analyzing trace with hash -18741442, now seen corresponding path program 1 times [2019-12-07 14:57:22,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:57:22,150 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810393361] [2019-12-07 14:57:22,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:57:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:57:22,188 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-12-07 14:57:22,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810393361] [2019-12-07 14:57:22,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:57:22,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 14:57:22,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595662951] [2019-12-07 14:57:22,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 14:57:22,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 14:57:22,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 14:57:22,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 14:57:22,189 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand 5 states. [2019-12-07 14:57:22,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:57:22,267 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2019-12-07 14:57:22,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 14:57:22,267 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2019-12-07 14:57:22,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:57:22,268 INFO L225 Difference]: With dead ends: 116 [2019-12-07 14:57:22,268 INFO L226 Difference]: Without dead ends: 116 [2019-12-07 14:57:22,268 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-07 14:57:22,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-12-07 14:57:22,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2019-12-07 14:57:22,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-12-07 14:57:22,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 124 transitions. [2019-12-07 14:57:22,270 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 124 transitions. Word has length 55 [2019-12-07 14:57:22,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:57:22,270 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 124 transitions. [2019-12-07 14:57:22,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 14:57:22,270 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 124 transitions. [2019-12-07 14:57:22,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-12-07 14:57:22,271 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:57:22,271 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:57:22,271 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2019-12-07 14:57:22,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:57:22,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1899387737, now seen corresponding path program 1 times [2019-12-07 14:57:22,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:57:22,271 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568430305] [2019-12-07 14:57:22,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:57:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:57:22,366 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 56 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-12-07 14:57:22,366 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568430305] [2019-12-07 14:57:22,366 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113738204] [2019-12-07 14:57:22,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_33f90220-b425-400b-a558-88e26b3e9a32/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:57:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:57:22,430 INFO L264 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-07 14:57:22,432 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:57:22,579 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 56 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-12-07 14:57:22,579 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 14:57:34,082 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 56 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-12-07 14:57:34,082 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2010756265] [2019-12-07 14:57:34,083 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-12-07 14:57:34,083 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 14:57:34,084 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 14:57:34,084 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 14:57:34,084 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 14:57:34,107 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:34,230 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:34,690 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:34,948 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:34,980 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:35,267 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:35,542 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:35,549 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:35,828 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 14:57:36,025 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2019-12-07 14:57:36,260 WARN L192 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2019-12-07 14:57:36,629 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2019-12-07 14:57:36,852 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2019-12-07 14:57:37,135 WARN L192 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2019-12-07 14:57:37,462 WARN L192 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2019-12-07 14:57:37,810 WARN L192 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 72 [2019-12-07 14:57:38,454 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 74 [2019-12-07 14:57:38,658 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2019-12-07 14:57:38,743 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:57:38,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 14:57:38,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2019-12-07 14:57:38,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374329587] [2019-12-07 14:57:38,744 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-07 14:57:38,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 14:57:38,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-07 14:57:38,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1077, Unknown=1, NotChecked=0, Total=1260 [2019-12-07 14:57:38,745 INFO L87 Difference]: Start difference. First operand 109 states and 124 transitions. Second operand 20 states. [2019-12-07 14:57:39,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:57:39,283 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2019-12-07 14:57:39,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 14:57:39,284 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2019-12-07 14:57:39,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:57:39,284 INFO L225 Difference]: With dead ends: 136 [2019-12-07 14:57:39,284 INFO L226 Difference]: Without dead ends: 136 [2019-12-07 14:57:39,285 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 149 SyntacticMatches, 8 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=376, Invalid=1975, Unknown=1, NotChecked=0, Total=2352 [2019-12-07 14:57:39,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-12-07 14:57:39,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 109. [2019-12-07 14:57:39,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-12-07 14:57:39,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 123 transitions. [2019-12-07 14:57:39,287 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 123 transitions. Word has length 59 [2019-12-07 14:57:39,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:57:39,287 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 123 transitions. [2019-12-07 14:57:39,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-07 14:57:39,288 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 123 transitions. [2019-12-07 14:57:39,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-12-07 14:57:39,289 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:57:39,289 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:57:39,489 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:57:39,490 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2019-12-07 14:57:39,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:57:39,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1111941965, now seen corresponding path program 1 times [2019-12-07 14:57:39,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:57:39,491 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882168666] [2019-12-07 14:57:39,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:57:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:57:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 50 proven. 32 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-12-07 14:57:39,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882168666] [2019-12-07 14:57:39,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447255208] [2019-12-07 14:57:39,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_33f90220-b425-400b-a558-88e26b3e9a32/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:57:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:57:39,758 INFO L264 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-07 14:57:39,760 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:57:39,855 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 56 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-12-07 14:57:39,855 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 14:57:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 56 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-12-07 14:57:48,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [769839166] [2019-12-07 14:57:48,669 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-12-07 14:57:48,669 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 14:57:48,669 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 14:57:48,669 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 14:57:48,669 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 14:57:48,695 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:48,788 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:49,235 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:49,514 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:49,545 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:49,792 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:50,070 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:50,100 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:50,338 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 14:57:50,537 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2019-12-07 14:57:50,772 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2019-12-07 14:57:51,157 WARN L192 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2019-12-07 14:57:51,382 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2019-12-07 14:57:51,721 WARN L192 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2019-12-07 14:57:52,119 WARN L192 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2019-12-07 14:57:52,473 WARN L192 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 72 [2019-12-07 14:57:52,796 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2019-12-07 14:57:53,178 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 74 [2019-12-07 14:57:53,373 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2019-12-07 14:57:53,688 WARN L192 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 80 [2019-12-07 14:57:53,907 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:57:53,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 14:57:53,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 20 [2019-12-07 14:57:53,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884778753] [2019-12-07 14:57:53,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-07 14:57:53,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 14:57:53,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-07 14:57:53,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1195, Unknown=1, NotChecked=0, Total=1406 [2019-12-07 14:57:53,909 INFO L87 Difference]: Start difference. First operand 109 states and 123 transitions. Second operand 20 states. [2019-12-07 14:57:54,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:57:54,600 INFO L93 Difference]: Finished difference Result 136 states and 149 transitions. [2019-12-07 14:57:54,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 14:57:54,600 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2019-12-07 14:57:54,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:57:54,601 INFO L225 Difference]: With dead ends: 136 [2019-12-07 14:57:54,601 INFO L226 Difference]: Without dead ends: 136 [2019-12-07 14:57:54,602 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 155 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=386, Invalid=1965, Unknown=1, NotChecked=0, Total=2352 [2019-12-07 14:57:54,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-12-07 14:57:54,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 109. [2019-12-07 14:57:54,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-12-07 14:57:54,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2019-12-07 14:57:54,605 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 60 [2019-12-07 14:57:54,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:57:54,605 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2019-12-07 14:57:54,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-07 14:57:54,605 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2019-12-07 14:57:54,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-12-07 14:57:54,606 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:57:54,606 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:57:54,806 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:57:54,807 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2019-12-07 14:57:54,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:57:54,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1133545265, now seen corresponding path program 1 times [2019-12-07 14:57:54,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:57:54,808 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649876581] [2019-12-07 14:57:54,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:57:54,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:57:54,926 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 56 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-12-07 14:57:54,926 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649876581] [2019-12-07 14:57:54,926 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380113915] [2019-12-07 14:57:54,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_33f90220-b425-400b-a558-88e26b3e9a32/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:57:54,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:57:54,994 INFO L264 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-07 14:57:54,996 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:57:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 61 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-12-07 14:57:55,327 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 14:57:55,595 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 60 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-12-07 14:57:55,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1145610014] [2019-12-07 14:57:55,596 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-12-07 14:57:55,596 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 14:57:55,596 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 14:57:55,596 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 14:57:55,597 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 14:57:55,620 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:55,707 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:56,159 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:56,384 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:56,440 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:57,453 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:57,501 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:57,539 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 14:57:57,906 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 14:57:58,125 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2019-12-07 14:57:58,386 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2019-12-07 14:57:58,826 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2019-12-07 14:57:59,087 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2019-12-07 14:57:59,406 WARN L192 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2019-12-07 14:57:59,979 WARN L192 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2019-12-07 14:58:00,600 WARN L192 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2019-12-07 14:58:00,820 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2019-12-07 14:58:01,163 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2019-12-07 14:58:01,514 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 59 [2019-12-07 14:58:01,855 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 61 [2019-12-07 14:58:02,268 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 69 [2019-12-07 14:58:02,546 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 81 [2019-12-07 14:58:02,815 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 77 [2019-12-07 14:58:02,906 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:58:02,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 14:58:02,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 13] total 32 [2019-12-07 14:58:02,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943526973] [2019-12-07 14:58:02,907 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-12-07 14:58:02,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 14:58:02,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-12-07 14:58:02,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=2173, Unknown=0, NotChecked=0, Total=2450 [2019-12-07 14:58:02,908 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand 32 states. [2019-12-07 14:58:04,242 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2019-12-07 14:58:04,399 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 89 [2019-12-07 14:58:04,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:58:04,870 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2019-12-07 14:58:04,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-07 14:58:04,870 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 61 [2019-12-07 14:58:04,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:58:04,871 INFO L225 Difference]: With dead ends: 123 [2019-12-07 14:58:04,871 INFO L226 Difference]: Without dead ends: 123 [2019-12-07 14:58:04,872 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 143 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=738, Invalid=4092, Unknown=0, NotChecked=0, Total=4830 [2019-12-07 14:58:04,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-12-07 14:58:04,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 99. [2019-12-07 14:58:04,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-07 14:58:04,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2019-12-07 14:58:04,874 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 61 [2019-12-07 14:58:04,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:58:04,874 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2019-12-07 14:58:04,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-12-07 14:58:04,874 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2019-12-07 14:58:04,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-12-07 14:58:04,875 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:58:04,875 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:58:05,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:58:05,076 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2019-12-07 14:58:05,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:58:05,076 INFO L82 PathProgramCache]: Analyzing trace with hash -110325956, now seen corresponding path program 1 times [2019-12-07 14:58:05,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:58:05,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789221638] [2019-12-07 14:58:05,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:58:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:58:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:58:05,189 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-12-07 14:58:05,190 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 14:58:05,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 02:58:05 BoogieIcfgContainer [2019-12-07 14:58:05,223 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 14:58:05,224 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 14:58:05,224 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 14:58:05,224 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 14:58:05,224 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:57:02" (3/4) ... [2019-12-07 14:58:05,226 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 14:58:05,264 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_33f90220-b425-400b-a558-88e26b3e9a32/bin/utaipan/witness.graphml [2019-12-07 14:58:05,264 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 14:58:05,265 INFO L168 Benchmark]: Toolchain (without parser) took 63126.34 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 358.1 MB). Free memory was 939.3 MB in the beginning and 1.0 GB in the end (delta: -81.0 MB). Peak memory consumption was 277.1 MB. Max. memory is 11.5 GB. [2019-12-07 14:58:05,265 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 14:58:05,265 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.36 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.0 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -136.1 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2019-12-07 14:58:05,265 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.52 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 14:58:05,265 INFO L168 Benchmark]: Boogie Preprocessor took 20.93 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 14:58:05,266 INFO L168 Benchmark]: RCFGBuilder took 357.93 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 45.2 MB). Peak memory consumption was 45.2 MB. Max. memory is 11.5 GB. [2019-12-07 14:58:05,266 INFO L168 Benchmark]: TraceAbstraction took 62345.02 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 261.1 MB). Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: -10.4 MB). Peak memory consumption was 250.7 MB. Max. memory is 11.5 GB. [2019-12-07 14:58:05,266 INFO L168 Benchmark]: Witness Printer took 40.80 ms. Allocated memory is still 1.4 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 11.5 GB. [2019-12-07 14:58:05,266 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 327.36 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.0 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -136.1 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.52 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.93 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 357.93 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 45.2 MB). Peak memory consumption was 45.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 62345.02 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 261.1 MB). Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: -10.4 MB). Peak memory consumption was 250.7 MB. Max. memory is 11.5 GB. * Witness Printer took 40.80 ms. Allocated memory is still 1.4 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 605]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L588] const int len = 5; [L568] DLL head = ((void *)0); [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND FALSE !(\read(head)) [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND FALSE !(len > 0) [L585] return head; [L589] DLL head = dll_create(len); [L590] head->next [L590] COND TRUE head->next [L591] EXPR head->data_0 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 [L591] EXPR head->data_1 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L591] EXPR head->data_2 [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L591] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L605] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 72 locations, 35 error locations. Result: UNSAFE, OverallTime: 62.2s, OverallIterations: 17, TraceHistogramMax: 5, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 646 SDtfs, 4021 SDslu, 1263 SDs, 0 SdLazy, 1996 SolverSat, 421 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1043 GetRequests, 730 SyntacticMatches, 35 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2931 ImplicationChecksByTransitivity, 44.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=109occurred in iteration=12, 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, 16 MinimizatonAttempts, 241 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 22.2s InterpolantComputationTime, 914 NumberOfCodeBlocks, 887 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1129 ConstructedInterpolants, 34 QuantifiedInterpolants, 219423 SizeOfPredicates, 82 NumberOfNonLiveVariables, 1873 ConjunctsInSsa, 153 ConjunctsInUnsatCore, 32 InterpolantComputations, 10 PerfectInterpolantSequences, 1442/1712 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...