./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_35a06eac-d97d-402a-8183-e105098932fe/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_35a06eac-d97d-402a-8183-e105098932fe/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_35a06eac-d97d-402a-8183-e105098932fe/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_35a06eac-d97d-402a-8183-e105098932fe/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_35a06eac-d97d-402a-8183-e105098932fe/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_35a06eac-d97d-402a-8183-e105098932fe/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b812e7d14425eea3a24125f5e2db40eadfc6c14c ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 15:01:02,695 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 15:01:02,696 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 15:01:02,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 15:01:02,703 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 15:01:02,704 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 15:01:02,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 15:01:02,706 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 15:01:02,707 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 15:01:02,708 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 15:01:02,709 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 15:01:02,709 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 15:01:02,710 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 15:01:02,710 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 15:01:02,711 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 15:01:02,712 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 15:01:02,712 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 15:01:02,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 15:01:02,714 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 15:01:02,715 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 15:01:02,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 15:01:02,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 15:01:02,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 15:01:02,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 15:01:02,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 15:01:02,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 15:01:02,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 15:01:02,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 15:01:02,721 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 15:01:02,722 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 15:01:02,722 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 15:01:02,722 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 15:01:02,722 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 15:01:02,723 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 15:01:02,724 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 15:01:02,724 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 15:01:02,724 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 15:01:02,724 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 15:01:02,724 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 15:01:02,725 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 15:01:02,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 15:01:02,726 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_35a06eac-d97d-402a-8183-e105098932fe/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2019-12-07 15:01:02,736 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 15:01:02,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 15:01:02,737 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 15:01:02,737 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 15:01:02,737 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 15:01:02,737 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 15:01:02,737 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 15:01:02,737 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 15:01:02,737 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 15:01:02,738 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 15:01:02,738 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 15:01:02,738 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 15:01:02,738 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 15:01:02,738 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 15:01:02,738 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 15:01:02,739 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 15:01:02,739 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 15:01:02,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 15:01:02,739 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 15:01:02,739 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 15:01:02,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 15:01:02,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 15:01:02,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 15:01:02,740 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-12-07 15:01:02,740 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-12-07 15:01:02,740 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-12-07 15:01:02,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 15:01:02,740 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 15:01:02,740 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 15:01:02,740 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 15:01:02,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 15:01:02,741 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 15:01:02,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 15:01:02,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 15:01:02,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 15:01:02,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 15:01:02,741 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 15:01:02,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 15:01:02,742 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 15:01:02,742 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 15:01:02,742 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_35a06eac-d97d-402a-8183-e105098932fe/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b812e7d14425eea3a24125f5e2db40eadfc6c14c [2019-12-07 15:01:02,839 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 15:01:02,849 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 15:01:02,852 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 15:01:02,853 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 15:01:02,853 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 15:01:02,854 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_35a06eac-d97d-402a-8183-e105098932fe/bin/utaipan/../../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i [2019-12-07 15:01:02,898 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_35a06eac-d97d-402a-8183-e105098932fe/bin/utaipan/data/42ae8064b/b3b2bbda1de54cc29c42d430644ac58b/FLAG58e6768f7 [2019-12-07 15:01:03,334 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 15:01:03,335 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_35a06eac-d97d-402a-8183-e105098932fe/sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i [2019-12-07 15:01:03,343 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_35a06eac-d97d-402a-8183-e105098932fe/bin/utaipan/data/42ae8064b/b3b2bbda1de54cc29c42d430644ac58b/FLAG58e6768f7 [2019-12-07 15:01:03,352 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_35a06eac-d97d-402a-8183-e105098932fe/bin/utaipan/data/42ae8064b/b3b2bbda1de54cc29c42d430644ac58b [2019-12-07 15:01:03,353 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 15:01:03,354 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 15:01:03,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 15:01:03,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 15:01:03,357 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 15:01:03,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 03:01:03" (1/1) ... [2019-12-07 15:01:03,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eba8e3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:01:03, skipping insertion in model container [2019-12-07 15:01:03,360 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 03:01:03" (1/1) ... [2019-12-07 15:01:03,365 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 15:01:03,396 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 15:01:03,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 15:01:03,615 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 15:01:03,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 15:01:03,670 INFO L208 MainTranslator]: Completed translation [2019-12-07 15:01:03,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:01:03 WrapperNode [2019-12-07 15:01:03,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 15:01:03,671 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 15:01:03,671 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 15:01:03,671 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 15:01:03,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:01:03" (1/1) ... [2019-12-07 15:01:03,686 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:01:03" (1/1) ... [2019-12-07 15:01:03,699 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 15:01:03,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 15:01:03,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 15:01:03,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 15:01:03,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:01:03" (1/1) ... [2019-12-07 15:01:03,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:01:03" (1/1) ... [2019-12-07 15:01:03,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:01:03" (1/1) ... [2019-12-07 15:01:03,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:01:03" (1/1) ... [2019-12-07 15:01:03,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:01:03" (1/1) ... [2019-12-07 15:01:03,714 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:01:03" (1/1) ... [2019-12-07 15:01:03,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:01:03" (1/1) ... [2019-12-07 15:01:03,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 15:01:03,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 15:01:03,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 15:01:03,717 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 15:01:03,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:01:03" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_35a06eac-d97d-402a-8183-e105098932fe/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 15:01:03,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 15:01:03,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 15:01:03,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 15:01:03,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 15:01:03,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 15:01:03,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 15:01:03,958 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 15:01:03,958 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-12-07 15:01:03,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:01:03 BoogieIcfgContainer [2019-12-07 15:01:03,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 15:01:03,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 15:01:03,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 15:01:03,961 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 15:01:03,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 03:01:03" (1/3) ... [2019-12-07 15:01:03,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e86e5f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 03:01:03, skipping insertion in model container [2019-12-07 15:01:03,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:01:03" (2/3) ... [2019-12-07 15:01:03,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e86e5f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 03:01:03, skipping insertion in model container [2019-12-07 15:01:03,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:01:03" (3/3) ... [2019-12-07 15:01:03,963 INFO L109 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlen-alloca-1.i [2019-12-07 15:01:03,970 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 15:01:03,974 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-12-07 15:01:03,981 INFO L249 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-12-07 15:01:03,993 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 15:01:03,993 INFO L374 AbstractCegarLoop]: Hoare is false [2019-12-07 15:01:03,993 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 15:01:03,993 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 15:01:03,994 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 15:01:03,994 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 15:01:03,994 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 15:01:03,994 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 15:01:04,002 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-12-07 15:01:04,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-12-07 15:01:04,007 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:01:04,007 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-12-07 15:01:04,007 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 15:01:04,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:01:04,011 INFO L82 PathProgramCache]: Analyzing trace with hash 91841, now seen corresponding path program 1 times [2019-12-07 15:01:04,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:01:04,017 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447383333] [2019-12-07 15:01:04,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:01:04,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:01:04,112 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 15:01:04,113 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447383333] [2019-12-07 15:01:04,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:01:04,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-07 15:01:04,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605303747] [2019-12-07 15:01:04,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 15:01:04,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 15:01:04,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 15:01:04,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 15:01:04,127 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 3 states. [2019-12-07 15:01:04,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:01:04,152 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2019-12-07 15:01:04,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 15:01:04,153 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-12-07 15:01:04,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:01:04,159 INFO L225 Difference]: With dead ends: 14 [2019-12-07 15:01:04,159 INFO L226 Difference]: Without dead ends: 13 [2019-12-07 15:01:04,161 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 15:01:04,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-12-07 15:01:04,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-12-07 15:01:04,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-12-07 15:01:04,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-12-07 15:01:04,188 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 3 [2019-12-07 15:01:04,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:01:04,188 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-12-07 15:01:04,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 15:01:04,188 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-12-07 15:01:04,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-12-07 15:01:04,188 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:01:04,189 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-12-07 15:01:04,189 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 15:01:04,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:01:04,189 INFO L82 PathProgramCache]: Analyzing trace with hash 91842, now seen corresponding path program 1 times [2019-12-07 15:01:04,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:01:04,190 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963685502] [2019-12-07 15:01:04,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:01:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:01:04,233 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 15:01:04,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963685502] [2019-12-07 15:01:04,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:01:04,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 15:01:04,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228704705] [2019-12-07 15:01:04,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 15:01:04,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 15:01:04,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 15:01:04,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 15:01:04,236 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 4 states. [2019-12-07 15:01:04,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:01:04,266 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2019-12-07 15:01:04,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 15:01:04,266 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-12-07 15:01:04,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:01:04,267 INFO L225 Difference]: With dead ends: 12 [2019-12-07 15:01:04,267 INFO L226 Difference]: Without dead ends: 12 [2019-12-07 15:01:04,267 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 15:01:04,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-12-07 15:01:04,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-12-07 15:01:04,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-12-07 15:01:04,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-12-07 15:01:04,270 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 3 [2019-12-07 15:01:04,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:01:04,270 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-12-07 15:01:04,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 15:01:04,270 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2019-12-07 15:01:04,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-12-07 15:01:04,270 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:01:04,270 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-12-07 15:01:04,271 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 15:01:04,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:01:04,271 INFO L82 PathProgramCache]: Analyzing trace with hash 93215, now seen corresponding path program 1 times [2019-12-07 15:01:04,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:01:04,271 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135276734] [2019-12-07 15:01:04,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:01:04,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:01:04,308 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 15:01:04,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135276734] [2019-12-07 15:01:04,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:01:04,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-07 15:01:04,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306891747] [2019-12-07 15:01:04,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 15:01:04,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 15:01:04,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 15:01:04,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 15:01:04,310 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2019-12-07 15:01:04,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:01:04,320 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2019-12-07 15:01:04,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 15:01:04,320 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-12-07 15:01:04,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:01:04,320 INFO L225 Difference]: With dead ends: 11 [2019-12-07 15:01:04,321 INFO L226 Difference]: Without dead ends: 11 [2019-12-07 15:01:04,321 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 15:01:04,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-12-07 15:01:04,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-12-07 15:01:04,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 15:01:04,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-12-07 15:01:04,323 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 3 [2019-12-07 15:01:04,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:01:04,323 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-12-07 15:01:04,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 15:01:04,323 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-12-07 15:01:04,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 15:01:04,323 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:01:04,323 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 15:01:04,324 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 15:01:04,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:01:04,324 INFO L82 PathProgramCache]: Analyzing trace with hash 2890506, now seen corresponding path program 1 times [2019-12-07 15:01:04,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:01:04,324 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772115245] [2019-12-07 15:01:04,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:01:04,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:01:04,345 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 15:01:04,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772115245] [2019-12-07 15:01:04,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:01:04,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 15:01:04,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937141540] [2019-12-07 15:01:04,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 15:01:04,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 15:01:04,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 15:01:04,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 15:01:04,346 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 3 states. [2019-12-07 15:01:04,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:01:04,356 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2019-12-07 15:01:04,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 15:01:04,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-12-07 15:01:04,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:01:04,357 INFO L225 Difference]: With dead ends: 10 [2019-12-07 15:01:04,357 INFO L226 Difference]: Without dead ends: 10 [2019-12-07 15:01:04,357 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 15:01:04,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-12-07 15:01:04,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-12-07 15:01:04,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-12-07 15:01:04,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2019-12-07 15:01:04,359 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 4 [2019-12-07 15:01:04,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:01:04,359 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-12-07 15:01:04,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 15:01:04,359 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2019-12-07 15:01:04,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 15:01:04,359 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:01:04,359 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 15:01:04,359 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 15:01:04,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:01:04,360 INFO L82 PathProgramCache]: Analyzing trace with hash 2890507, now seen corresponding path program 1 times [2019-12-07 15:01:04,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:01:04,360 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609223743] [2019-12-07 15:01:04,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:01:04,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:01:04,388 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 15:01:04,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609223743] [2019-12-07 15:01:04,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:01:04,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 15:01:04,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425169430] [2019-12-07 15:01:04,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 15:01:04,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 15:01:04,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 15:01:04,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 15:01:04,390 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 4 states. [2019-12-07 15:01:04,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:01:04,411 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2019-12-07 15:01:04,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 15:01:04,411 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-12-07 15:01:04,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:01:04,411 INFO L225 Difference]: With dead ends: 11 [2019-12-07 15:01:04,411 INFO L226 Difference]: Without dead ends: 11 [2019-12-07 15:01:04,412 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 15:01:04,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-12-07 15:01:04,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-12-07 15:01:04,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 15:01:04,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-12-07 15:01:04,413 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 4 [2019-12-07 15:01:04,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:01:04,414 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-12-07 15:01:04,414 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 15:01:04,414 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-12-07 15:01:04,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 15:01:04,414 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:01:04,414 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 15:01:04,414 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 15:01:04,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:01:04,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1517190188, now seen corresponding path program 1 times [2019-12-07 15:01:04,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:01:04,415 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484550674] [2019-12-07 15:01:04,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:01:04,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:01:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:04,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484550674] [2019-12-07 15:01:04,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:01:04,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 15:01:04,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629238338] [2019-12-07 15:01:04,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 15:01:04,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 15:01:04,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 15:01:04,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-12-07 15:01:04,501 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2019-12-07 15:01:04,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:01:04,545 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2019-12-07 15:01:04,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 15:01:04,546 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2019-12-07 15:01:04,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:01:04,546 INFO L225 Difference]: With dead ends: 19 [2019-12-07 15:01:04,546 INFO L226 Difference]: Without dead ends: 19 [2019-12-07 15:01:04,547 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-07 15:01:04,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-12-07 15:01:04,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2019-12-07 15:01:04,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-12-07 15:01:04,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-12-07 15:01:04,549 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 6 [2019-12-07 15:01:04,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:01:04,549 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-12-07 15:01:04,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 15:01:04,550 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-12-07 15:01:04,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 15:01:04,550 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:01:04,550 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:01:04,550 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 15:01:04,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:01:04,551 INFO L82 PathProgramCache]: Analyzing trace with hash 211727863, now seen corresponding path program 1 times [2019-12-07 15:01:04,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:01:04,551 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545206489] [2019-12-07 15:01:04,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:01:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:01:04,592 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 15:01:04,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545206489] [2019-12-07 15:01:04,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:01:04,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 15:01:04,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991601517] [2019-12-07 15:01:04,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 15:01:04,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 15:01:04,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 15:01:04,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 15:01:04,593 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2019-12-07 15:01:04,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:01:04,601 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2019-12-07 15:01:04,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 15:01:04,602 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-07 15:01:04,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:01:04,602 INFO L225 Difference]: With dead ends: 14 [2019-12-07 15:01:04,602 INFO L226 Difference]: Without dead ends: 9 [2019-12-07 15:01:04,602 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 15:01:04,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-12-07 15:01:04,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-12-07 15:01:04,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-12-07 15:01:04,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-12-07 15:01:04,603 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2019-12-07 15:01:04,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:01:04,603 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-12-07 15:01:04,604 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 15:01:04,604 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-12-07 15:01:04,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 15:01:04,604 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:01:04,604 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:01:04,604 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 15:01:04,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:01:04,604 INFO L82 PathProgramCache]: Analyzing trace with hash 2013045642, now seen corresponding path program 1 times [2019-12-07 15:01:04,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:01:04,605 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316737664] [2019-12-07 15:01:04,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:01:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:01:04,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:04,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316737664] [2019-12-07 15:01:04,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830450759] [2019-12-07 15:01:04,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_35a06eac-d97d-402a-8183-e105098932fe/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 15:01:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:01:04,694 INFO L264 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 15:01:04,698 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:01:04,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:04,729 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 15:01:04,796 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-12-07 15:01:04,796 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 15:01:04,798 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 15:01:04,798 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 15:01:04,798 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:9, output treesize:3 [2019-12-07 15:01:04,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:04,814 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1625951970] [2019-12-07 15:01:04,829 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 15:01:04,830 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 15:01:04,833 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 15:01:04,837 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 15:01:04,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 15:01:04,931 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 15:01:05,223 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 15:01:05,366 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 45 [2019-12-07 15:01:05,752 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2019-12-07 15:01:05,829 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 15:01:05,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 15:01:05,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2019-12-07 15:01:05,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626603314] [2019-12-07 15:01:05,830 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 15:01:05,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 15:01:05,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 15:01:05,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2019-12-07 15:01:05,831 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 12 states. [2019-12-07 15:01:05,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:01:05,949 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2019-12-07 15:01:05,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 15:01:05,949 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 8 [2019-12-07 15:01:05,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:01:05,950 INFO L225 Difference]: With dead ends: 12 [2019-12-07 15:01:05,950 INFO L226 Difference]: Without dead ends: 12 [2019-12-07 15:01:05,950 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2019-12-07 15:01:05,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-12-07 15:01:05,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2019-12-07 15:01:05,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 15:01:05,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-12-07 15:01:05,952 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2019-12-07 15:01:05,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:01:05,952 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-12-07 15:01:05,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 15:01:05,952 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-12-07 15:01:05,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 15:01:05,953 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:01:05,953 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 15:01:06,153 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:01:06,154 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 15:01:06,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:01:06,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1801578643, now seen corresponding path program 2 times [2019-12-07 15:01:06,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:01:06,156 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074026417] [2019-12-07 15:01:06,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:01:06,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:01:06,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:06,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074026417] [2019-12-07 15:01:06,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830768716] [2019-12-07 15:01:06,407 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_35a06eac-d97d-402a-8183-e105098932fe/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 15:01:06,436 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 15:01:06,436 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:01:06,437 INFO L264 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2019-12-07 15:01:06,437 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:01:06,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:06,548 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 15:01:06,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:06,636 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2133006979] [2019-12-07 15:01:06,637 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 15:01:06,637 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 15:01:06,637 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 15:01:06,637 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 15:01:06,637 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 15:01:06,691 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 15:01:06,869 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 15:01:07,410 WARN L192 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2019-12-07 15:01:07,570 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 15:01:07,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 15:01:07,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2019-12-07 15:01:07,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410978054] [2019-12-07 15:01:07,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-07 15:01:07,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 15:01:07,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-07 15:01:07,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2019-12-07 15:01:07,572 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 21 states. [2019-12-07 15:01:08,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:01:08,091 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2019-12-07 15:01:08,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 15:01:08,091 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 10 [2019-12-07 15:01:08,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:01:08,092 INFO L225 Difference]: With dead ends: 19 [2019-12-07 15:01:08,092 INFO L226 Difference]: Without dead ends: 14 [2019-12-07 15:01:08,092 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2019-12-07 15:01:08,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-12-07 15:01:08,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2019-12-07 15:01:08,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-12-07 15:01:08,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-12-07 15:01:08,094 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-12-07 15:01:08,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:01:08,094 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-12-07 15:01:08,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-07 15:01:08,094 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-12-07 15:01:08,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 15:01:08,094 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:01:08,095 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1] [2019-12-07 15:01:08,295 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:01:08,296 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 15:01:08,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:01:08,297 INFO L82 PathProgramCache]: Analyzing trace with hash -819315383, now seen corresponding path program 3 times [2019-12-07 15:01:08,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:01:08,298 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557715536] [2019-12-07 15:01:08,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:01:08,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:01:08,399 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 15:01:08,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557715536] [2019-12-07 15:01:08,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706289867] [2019-12-07 15:01:08,400 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_35a06eac-d97d-402a-8183-e105098932fe/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 15:01:08,427 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 15:01:08,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:01:08,428 INFO L264 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 27 conjunts are in the unsatisfiable core [2019-12-07 15:01:08,429 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:01:08,523 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 15:01:08,523 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 15:01:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:08,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1400913688] [2019-12-07 15:01:08,622 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 15:01:08,622 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 15:01:08,622 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 15:01:08,623 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 15:01:08,623 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 15:01:08,663 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 15:01:08,814 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 15:01:09,367 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2019-12-07 15:01:09,494 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 15:01:09,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 15:01:09,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2019-12-07 15:01:09,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350038839] [2019-12-07 15:01:09,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-07 15:01:09,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 15:01:09,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-07 15:01:09,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2019-12-07 15:01:09,497 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 23 states. [2019-12-07 15:01:09,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:01:09,749 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2019-12-07 15:01:09,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 15:01:09,749 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 12 [2019-12-07 15:01:09,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:01:09,749 INFO L225 Difference]: With dead ends: 16 [2019-12-07 15:01:09,750 INFO L226 Difference]: Without dead ends: 16 [2019-12-07 15:01:09,750 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2019-12-07 15:01:09,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-12-07 15:01:09,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-12-07 15:01:09,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-12-07 15:01:09,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-12-07 15:01:09,752 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2019-12-07 15:01:09,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:01:09,752 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-12-07 15:01:09,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-07 15:01:09,752 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-12-07 15:01:09,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 15:01:09,752 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:01:09,752 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2019-12-07 15:01:09,953 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:01:09,954 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 15:01:09,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:01:09,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1383068014, now seen corresponding path program 4 times [2019-12-07 15:01:09,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:01:09,955 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165420003] [2019-12-07 15:01:09,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:01:09,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:01:10,057 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:10,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165420003] [2019-12-07 15:01:10,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239752089] [2019-12-07 15:01:10,057 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_35a06eac-d97d-402a-8183-e105098932fe/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 15:01:10,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:01:10,085 INFO L264 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-07 15:01:10,086 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:01:10,269 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:10,269 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 15:01:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:10,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [660979485] [2019-12-07 15:01:10,474 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 15:01:10,474 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 15:01:10,474 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 15:01:10,474 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 15:01:10,474 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 15:01:10,506 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 15:01:10,659 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 15:01:11,742 WARN L192 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2019-12-07 15:01:12,113 WARN L192 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2019-12-07 15:01:12,115 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 15:01:12,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 15:01:12,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2019-12-07 15:01:12,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295351835] [2019-12-07 15:01:12,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-07 15:01:12,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 15:01:12,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-07 15:01:12,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2019-12-07 15:01:12,119 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 29 states. [2019-12-07 15:01:12,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:01:12,685 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2019-12-07 15:01:12,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 15:01:12,685 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 14 [2019-12-07 15:01:12,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:01:12,685 INFO L225 Difference]: With dead ends: 25 [2019-12-07 15:01:12,686 INFO L226 Difference]: Without dead ends: 18 [2019-12-07 15:01:12,686 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=223, Invalid=1757, Unknown=0, NotChecked=0, Total=1980 [2019-12-07 15:01:12,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-12-07 15:01:12,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-12-07 15:01:12,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 15:01:12,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-12-07 15:01:12,688 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2019-12-07 15:01:12,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:01:12,688 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-12-07 15:01:12,688 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-07 15:01:12,689 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-12-07 15:01:12,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 15:01:12,689 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:01:12,689 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1] [2019-12-07 15:01:12,890 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:01:12,890 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 15:01:12,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:01:12,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1760356280, now seen corresponding path program 5 times [2019-12-07 15:01:12,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:01:12,892 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152407201] [2019-12-07 15:01:12,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:01:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:01:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:13,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152407201] [2019-12-07 15:01:13,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52635151] [2019-12-07 15:01:13,005 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_35a06eac-d97d-402a-8183-e105098932fe/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 15:01:13,035 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-07 15:01:13,035 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:01:13,036 INFO L264 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-07 15:01:13,037 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:01:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:13,155 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 15:01:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:13,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [532860527] [2019-12-07 15:01:13,323 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 15:01:13,323 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 15:01:13,323 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 15:01:13,323 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 15:01:13,323 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 15:01:13,448 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 15:01:13,473 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 15:01:13,572 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 15:01:13,872 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2019-12-07 15:01:14,153 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2019-12-07 15:01:14,242 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 15:01:14,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 15:01:14,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2019-12-07 15:01:14,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708190355] [2019-12-07 15:01:14,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-07 15:01:14,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 15:01:14,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-07 15:01:14,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2019-12-07 15:01:14,243 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 29 states. [2019-12-07 15:01:14,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:01:14,512 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2019-12-07 15:01:14,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 15:01:14,513 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 16 [2019-12-07 15:01:14,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:01:14,513 INFO L225 Difference]: With dead ends: 20 [2019-12-07 15:01:14,513 INFO L226 Difference]: Without dead ends: 20 [2019-12-07 15:01:14,514 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=291, Invalid=1349, Unknown=0, NotChecked=0, Total=1640 [2019-12-07 15:01:14,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-12-07 15:01:14,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-12-07 15:01:14,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-12-07 15:01:14,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-12-07 15:01:14,515 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2019-12-07 15:01:14,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:01:14,515 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-12-07 15:01:14,515 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-07 15:01:14,515 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-12-07 15:01:14,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 15:01:14,516 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:01:14,516 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2019-12-07 15:01:14,716 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:01:14,716 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 15:01:14,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:01:14,717 INFO L82 PathProgramCache]: Analyzing trace with hash 514729425, now seen corresponding path program 6 times [2019-12-07 15:01:14,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:01:14,717 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333167099] [2019-12-07 15:01:14,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:01:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:01:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:14,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333167099] [2019-12-07 15:01:14,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369011868] [2019-12-07 15:01:14,878 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_35a06eac-d97d-402a-8183-e105098932fe/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 15:01:14,909 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 15:01:14,909 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:01:14,910 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 37 conjunts are in the unsatisfiable core [2019-12-07 15:01:14,911 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:01:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:15,014 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 15:01:15,107 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:15,108 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [76780378] [2019-12-07 15:01:15,108 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 15:01:15,108 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 15:01:15,109 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 15:01:15,109 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 15:01:15,109 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 15:01:15,145 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 15:01:15,293 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 15:01:15,806 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2019-12-07 15:01:15,899 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 15:01:15,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 15:01:15,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2019-12-07 15:01:15,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477147944] [2019-12-07 15:01:15,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-07 15:01:15,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 15:01:15,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-07 15:01:15,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2019-12-07 15:01:15,900 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 23 states. [2019-12-07 15:01:16,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:01:16,149 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2019-12-07 15:01:16,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 15:01:16,149 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 18 [2019-12-07 15:01:16,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:01:16,150 INFO L225 Difference]: With dead ends: 31 [2019-12-07 15:01:16,150 INFO L226 Difference]: Without dead ends: 22 [2019-12-07 15:01:16,150 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2019-12-07 15:01:16,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-12-07 15:01:16,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-12-07 15:01:16,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-12-07 15:01:16,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-12-07 15:01:16,152 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2019-12-07 15:01:16,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:01:16,152 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-12-07 15:01:16,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-07 15:01:16,152 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-12-07 15:01:16,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-07 15:01:16,153 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:01:16,153 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1] [2019-12-07 15:01:16,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:01:16,354 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 15:01:16,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:01:16,354 INFO L82 PathProgramCache]: Analyzing trace with hash 394880135, now seen corresponding path program 7 times [2019-12-07 15:01:16,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:01:16,355 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349552756] [2019-12-07 15:01:16,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:01:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:01:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:16,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349552756] [2019-12-07 15:01:16,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322864954] [2019-12-07 15:01:16,467 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_35a06eac-d97d-402a-8183-e105098932fe/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 15:01:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:01:16,496 INFO L264 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 35 conjunts are in the unsatisfiable core [2019-12-07 15:01:16,497 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:01:16,547 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:16,547 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 15:01:16,689 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:16,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [913633814] [2019-12-07 15:01:16,690 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 15:01:16,690 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 15:01:16,691 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 15:01:16,691 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 15:01:16,691 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 15:01:16,815 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 15:01:16,822 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 15:01:16,920 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 15:01:17,215 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2019-12-07 15:01:17,506 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2019-12-07 15:01:17,591 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 15:01:17,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 15:01:17,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2019-12-07 15:01:17,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898310834] [2019-12-07 15:01:17,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-07 15:01:17,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 15:01:17,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-07 15:01:17,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2019-12-07 15:01:17,593 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 24 states. [2019-12-07 15:01:17,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:01:17,902 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-12-07 15:01:17,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 15:01:17,902 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 20 [2019-12-07 15:01:17,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:01:17,903 INFO L225 Difference]: With dead ends: 24 [2019-12-07 15:01:17,903 INFO L226 Difference]: Without dead ends: 24 [2019-12-07 15:01:17,903 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2019-12-07 15:01:17,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-12-07 15:01:17,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-12-07 15:01:17,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-07 15:01:17,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-12-07 15:01:17,905 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2019-12-07 15:01:17,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:01:17,905 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-12-07 15:01:17,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-07 15:01:17,905 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-12-07 15:01:17,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 15:01:17,906 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:01:17,906 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2019-12-07 15:01:18,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:01:18,107 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 15:01:18,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:01:18,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1522687568, now seen corresponding path program 8 times [2019-12-07 15:01:18,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:01:18,108 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412802624] [2019-12-07 15:01:18,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:01:18,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:01:18,428 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:18,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412802624] [2019-12-07 15:01:18,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539044850] [2019-12-07 15:01:18,429 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_35a06eac-d97d-402a-8183-e105098932fe/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 15:01:18,466 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-07 15:01:18,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:01:18,467 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 45 conjunts are in the unsatisfiable core [2019-12-07 15:01:18,468 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:01:18,765 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:18,766 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 15:01:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:19,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [412966352] [2019-12-07 15:01:19,217 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 15:01:19,218 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 15:01:19,218 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 15:01:19,218 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 15:01:19,218 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 15:01:19,348 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 15:01:19,354 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 15:01:19,439 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 15:01:19,842 WARN L192 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2019-12-07 15:01:20,734 WARN L192 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2019-12-07 15:01:21,056 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2019-12-07 15:01:21,057 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 15:01:21,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 15:01:21,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 34 [2019-12-07 15:01:21,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842025678] [2019-12-07 15:01:21,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-12-07 15:01:21,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 15:01:21,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-12-07 15:01:21,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1449, Unknown=0, NotChecked=0, Total=1560 [2019-12-07 15:01:21,060 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 35 states. [2019-12-07 15:01:22,245 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2019-12-07 15:01:23,357 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 24 [2019-12-07 15:01:23,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:01:23,398 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2019-12-07 15:01:23,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-07 15:01:23,399 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 22 [2019-12-07 15:01:23,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:01:23,401 INFO L225 Difference]: With dead ends: 37 [2019-12-07 15:01:23,401 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 15:01:23,404 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=266, Invalid=2926, Unknown=0, NotChecked=0, Total=3192 [2019-12-07 15:01:23,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 15:01:23,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2019-12-07 15:01:23,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-12-07 15:01:23,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-12-07 15:01:23,410 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2019-12-07 15:01:23,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:01:23,411 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-12-07 15:01:23,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-12-07 15:01:23,411 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-12-07 15:01:23,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-07 15:01:23,413 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:01:23,413 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1] [2019-12-07 15:01:23,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:01:23,615 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 15:01:23,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:01:23,615 INFO L82 PathProgramCache]: Analyzing trace with hash -506244602, now seen corresponding path program 9 times [2019-12-07 15:01:23,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:01:23,616 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639508537] [2019-12-07 15:01:23,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:01:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:01:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:23,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639508537] [2019-12-07 15:01:23,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218272105] [2019-12-07 15:01:23,730 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_35a06eac-d97d-402a-8183-e105098932fe/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:01:23,767 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 15:01:23,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:01:23,768 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 42 conjunts are in the unsatisfiable core [2019-12-07 15:01:23,769 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:01:23,983 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:23,983 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 15:01:24,253 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:24,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1054572434] [2019-12-07 15:01:24,254 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 15:01:24,254 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 15:01:24,254 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 15:01:24,255 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 15:01:24,255 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 15:01:24,284 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 15:01:24,411 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 15:01:24,628 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 45 [2019-12-07 15:01:25,119 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2019-12-07 15:01:25,297 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2019-12-07 15:01:25,297 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 15:01:25,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 15:01:25,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2019-12-07 15:01:25,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38693055] [2019-12-07 15:01:25,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-12-07 15:01:25,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 15:01:25,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-12-07 15:01:25,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1908, Unknown=0, NotChecked=0, Total=2162 [2019-12-07 15:01:25,300 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 41 states. [2019-12-07 15:01:25,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:01:25,928 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2019-12-07 15:01:25,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 15:01:25,928 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 24 [2019-12-07 15:01:25,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:01:25,928 INFO L225 Difference]: With dead ends: 28 [2019-12-07 15:01:25,928 INFO L226 Difference]: Without dead ends: 28 [2019-12-07 15:01:25,929 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=489, Invalid=2591, Unknown=0, NotChecked=0, Total=3080 [2019-12-07 15:01:25,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-07 15:01:25,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-12-07 15:01:25,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-07 15:01:25,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-12-07 15:01:25,931 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2019-12-07 15:01:25,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:01:25,931 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-12-07 15:01:25,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-12-07 15:01:25,931 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-12-07 15:01:25,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-07 15:01:25,932 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:01:25,932 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2019-12-07 15:01:26,132 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:01:26,133 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 15:01:26,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:01:26,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1169758193, now seen corresponding path program 10 times [2019-12-07 15:01:26,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:01:26,135 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360701267] [2019-12-07 15:01:26,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:01:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:01:26,276 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:26,277 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360701267] [2019-12-07 15:01:26,277 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122510305] [2019-12-07 15:01:26,277 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_35a06eac-d97d-402a-8183-e105098932fe/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:01:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:01:26,310 INFO L264 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 51 conjunts are in the unsatisfiable core [2019-12-07 15:01:26,311 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:01:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:26,353 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 15:01:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:26,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1227494684] [2019-12-07 15:01:26,406 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 15:01:26,406 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 15:01:26,406 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 15:01:26,407 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 15:01:26,407 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 15:01:26,537 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 15:01:26,549 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 15:01:26,630 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 15:01:26,929 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2019-12-07 15:01:27,212 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2019-12-07 15:01:27,299 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 15:01:27,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 15:01:27,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 19 [2019-12-07 15:01:27,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187287044] [2019-12-07 15:01:27,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-07 15:01:27,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 15:01:27,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-07 15:01:27,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2019-12-07 15:01:27,300 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 20 states. [2019-12-07 15:01:27,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:01:27,663 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2019-12-07 15:01:27,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-07 15:01:27,664 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 26 [2019-12-07 15:01:27,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:01:27,664 INFO L225 Difference]: With dead ends: 43 [2019-12-07 15:01:27,664 INFO L226 Difference]: Without dead ends: 30 [2019-12-07 15:01:27,665 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=141, Invalid=1191, Unknown=0, NotChecked=0, Total=1332 [2019-12-07 15:01:27,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-07 15:01:27,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-12-07 15:01:27,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-07 15:01:27,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-12-07 15:01:27,667 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2019-12-07 15:01:27,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:01:27,667 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-12-07 15:01:27,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-07 15:01:27,667 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-12-07 15:01:27,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-07 15:01:27,668 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:01:27,668 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1] [2019-12-07 15:01:27,869 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:01:27,870 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 15:01:27,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:01:27,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1549070139, now seen corresponding path program 11 times [2019-12-07 15:01:27,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:01:27,871 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552066133] [2019-12-07 15:01:27,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:01:27,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:01:28,041 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:28,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552066133] [2019-12-07 15:01:28,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148016315] [2019-12-07 15:01:28,042 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_35a06eac-d97d-402a-8183-e105098932fe/bin/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:01:28,086 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-12-07 15:01:28,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:01:28,088 INFO L264 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 42 conjunts are in the unsatisfiable core [2019-12-07 15:01:28,089 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:01:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:28,371 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 15:01:28,723 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:28,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [636440773] [2019-12-07 15:01:28,724 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 15:01:28,724 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 15:01:28,724 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 15:01:28,724 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 15:01:28,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 15:01:28,753 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 15:01:28,876 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 15:01:29,528 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2019-12-07 15:01:29,773 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2019-12-07 15:01:29,775 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 15:01:29,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 15:01:29,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2019-12-07 15:01:29,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617144442] [2019-12-07 15:01:29,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-12-07 15:01:29,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 15:01:29,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-12-07 15:01:29,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=2412, Unknown=0, NotChecked=0, Total=2756 [2019-12-07 15:01:29,779 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 47 states. [2019-12-07 15:01:30,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:01:30,817 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2019-12-07 15:01:30,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 15:01:30,817 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 28 [2019-12-07 15:01:30,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:01:30,818 INFO L225 Difference]: With dead ends: 32 [2019-12-07 15:01:30,818 INFO L226 Difference]: Without dead ends: 32 [2019-12-07 15:01:30,819 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=680, Invalid=3226, Unknown=0, NotChecked=0, Total=3906 [2019-12-07 15:01:30,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-07 15:01:30,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-12-07 15:01:30,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-12-07 15:01:30,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2019-12-07 15:01:30,820 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2019-12-07 15:01:30,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:01:30,821 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2019-12-07 15:01:30,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-12-07 15:01:30,821 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2019-12-07 15:01:30,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-07 15:01:30,821 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:01:30,821 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2019-12-07 15:01:31,022 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:01:31,023 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 15:01:31,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:01:31,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1697248014, now seen corresponding path program 12 times [2019-12-07 15:01:31,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:01:31,024 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106955591] [2019-12-07 15:01:31,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:01:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:01:31,219 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:31,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106955591] [2019-12-07 15:01:31,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929534120] [2019-12-07 15:01:31,219 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_35a06eac-d97d-402a-8183-e105098932fe/bin/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:01:31,260 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 15:01:31,261 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:01:31,262 INFO L264 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 55 conjunts are in the unsatisfiable core [2019-12-07 15:01:31,263 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:01:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:31,462 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 15:01:31,626 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:31,626 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [120639593] [2019-12-07 15:01:31,627 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 15:01:31,627 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 15:01:31,627 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 15:01:31,627 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 15:01:31,627 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 15:01:31,760 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 15:01:31,767 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 15:01:31,884 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 15:01:32,219 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2019-12-07 15:01:32,540 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2019-12-07 15:01:32,638 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 15:01:32,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 15:01:32,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 30 [2019-12-07 15:01:32,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437891106] [2019-12-07 15:01:32,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-12-07 15:01:32,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 15:01:32,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-12-07 15:01:32,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1180, Unknown=0, NotChecked=0, Total=1260 [2019-12-07 15:01:32,640 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 31 states. [2019-12-07 15:01:33,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:01:33,891 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2019-12-07 15:01:33,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-07 15:01:33,893 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2019-12-07 15:01:33,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:01:33,894 INFO L225 Difference]: With dead ends: 49 [2019-12-07 15:01:33,895 INFO L226 Difference]: Without dead ends: 34 [2019-12-07 15:01:33,898 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 65 SyntacticMatches, 8 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=251, Invalid=3055, Unknown=0, NotChecked=0, Total=3306 [2019-12-07 15:01:33,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-07 15:01:33,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-12-07 15:01:33,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-07 15:01:33,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2019-12-07 15:01:33,903 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2019-12-07 15:01:33,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:01:33,904 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2019-12-07 15:01:33,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-12-07 15:01:33,905 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2019-12-07 15:01:33,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-07 15:01:33,906 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:01:33,906 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1] [2019-12-07 15:01:34,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:01:34,108 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 15:01:34,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:01:34,108 INFO L82 PathProgramCache]: Analyzing trace with hash 977195204, now seen corresponding path program 13 times [2019-12-07 15:01:34,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:01:34,109 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973940981] [2019-12-07 15:01:34,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:01:34,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:01:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:34,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973940981] [2019-12-07 15:01:34,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171002017] [2019-12-07 15:01:34,276 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_35a06eac-d97d-402a-8183-e105098932fe/bin/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:01:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:01:34,317 INFO L264 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 50 conjunts are in the unsatisfiable core [2019-12-07 15:01:34,318 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:01:34,444 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:34,444 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 15:01:34,774 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:34,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1584872837] [2019-12-07 15:01:34,775 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 15:01:34,775 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 15:01:34,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 15:01:34,775 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 15:01:34,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 15:01:34,912 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 15:01:34,923 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 15:01:34,986 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 15:01:35,312 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2019-12-07 15:01:35,614 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2019-12-07 15:01:35,709 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 15:01:35,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 15:01:35,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2019-12-07 15:01:35,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723586019] [2019-12-07 15:01:35,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-12-07 15:01:35,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 15:01:35,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-12-07 15:01:35,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2019-12-07 15:01:35,711 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 36 states. [2019-12-07 15:01:36,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:01:36,336 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-12-07 15:01:36,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-07 15:01:36,336 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 32 [2019-12-07 15:01:36,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:01:36,337 INFO L225 Difference]: With dead ends: 36 [2019-12-07 15:01:36,337 INFO L226 Difference]: Without dead ends: 36 [2019-12-07 15:01:36,338 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 64 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=603, Invalid=2819, Unknown=0, NotChecked=0, Total=3422 [2019-12-07 15:01:36,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-07 15:01:36,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-12-07 15:01:36,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-07 15:01:36,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-12-07 15:01:36,339 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2019-12-07 15:01:36,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:01:36,339 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-12-07 15:01:36,340 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-12-07 15:01:36,340 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-12-07 15:01:36,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-07 15:01:36,340 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:01:36,340 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2019-12-07 15:01:36,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:01:36,541 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 15:01:36,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:01:36,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1513246899, now seen corresponding path program 14 times [2019-12-07 15:01:36,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:01:36,542 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857160239] [2019-12-07 15:01:36,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:01:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:01:36,766 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 8 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:01:36,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857160239] [2019-12-07 15:01:36,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017142007] [2019-12-07 15:01:36,766 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_35a06eac-d97d-402a-8183-e105098932fe/bin/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:01:36,831 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-12-07 15:01:36,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:01:36,833 INFO L264 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 37 conjunts are in the unsatisfiable core [2019-12-07 15:01:36,834 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:01:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-12-07 15:01:37,028 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 15:01:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-12-07 15:01:37,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1369603626] [2019-12-07 15:01:37,208 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 15:01:37,208 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 15:01:37,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 15:01:37,208 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 15:01:37,208 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 15:01:37,325 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 15:01:37,331 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 15:01:37,414 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 15:01:37,755 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2019-12-07 15:01:38,088 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2019-12-07 15:01:38,195 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 15:01:38,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 15:01:38,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 4, 4] total 28 [2019-12-07 15:01:38,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654082310] [2019-12-07 15:01:38,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-07 15:01:38,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 15:01:38,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-07 15:01:38,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1048, Unknown=0, NotChecked=0, Total=1122 [2019-12-07 15:01:38,197 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 29 states. [2019-12-07 15:01:39,668 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2019-12-07 15:01:40,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:01:40,083 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-12-07 15:01:40,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-07 15:01:40,083 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 34 [2019-12-07 15:01:40,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:01:40,083 INFO L225 Difference]: With dead ends: 54 [2019-12-07 15:01:40,083 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 15:01:40,084 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=431, Invalid=3475, Unknown=0, NotChecked=0, Total=3906 [2019-12-07 15:01:40,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 15:01:40,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 15:01:40,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 15:01:40,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 15:01:40,085 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2019-12-07 15:01:40,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:01:40,085 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 15:01:40,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-07 15:01:40,085 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 15:01:40,085 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 15:01:40,285 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:01:40,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 03:01:40 BoogieIcfgContainer [2019-12-07 15:01:40,291 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 15:01:40,291 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 15:01:40,292 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 15:01:40,292 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 15:01:40,292 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:01:03" (3/4) ... [2019-12-07 15:01:40,294 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 15:01:40,302 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2019-12-07 15:01:40,302 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2019-12-07 15:01:40,302 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 15:01:40,332 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_35a06eac-d97d-402a-8183-e105098932fe/bin/utaipan/witness.graphml [2019-12-07 15:01:40,332 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 15:01:40,334 INFO L168 Benchmark]: Toolchain (without parser) took 36979.44 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 360.7 MB). Free memory was 944.2 MB in the beginning and 1.2 GB in the end (delta: -260.6 MB). Peak memory consumption was 100.1 MB. Max. memory is 11.5 GB. [2019-12-07 15:01:40,334 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 960.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 15:01:40,334 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.05 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 104.9 MB). Free memory was 938.9 MB in the beginning and 1.1 GB in the end (delta: -150.0 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2019-12-07 15:01:40,334 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.19 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 15:01:40,335 INFO L168 Benchmark]: Boogie Preprocessor took 17.15 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 15:01:40,335 INFO L168 Benchmark]: RCFGBuilder took 242.03 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: 28.8 MB). Peak memory consumption was 28.8 MB. Max. memory is 11.5 GB. [2019-12-07 15:01:40,335 INFO L168 Benchmark]: TraceAbstraction took 36331.88 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 255.9 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -153.8 MB). Peak memory consumption was 102.1 MB. Max. memory is 11.5 GB. [2019-12-07 15:01:40,335 INFO L168 Benchmark]: Witness Printer took 41.09 ms. Allocated memory is still 1.4 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 11.5 GB. [2019-12-07 15:01:40,337 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 960.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 316.05 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 104.9 MB). Free memory was 938.9 MB in the beginning and 1.1 GB in the end (delta: -150.0 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 28.19 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.15 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 242.03 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: 28.8 MB). Peak memory consumption was 28.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 36331.88 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 255.9 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -153.8 MB). Peak memory consumption was 102.1 MB. Max. memory is 11.5 GB. * Witness Printer took 41.09 ms. Allocated memory is still 1.4 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 530]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 530]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 7 error locations. Result: SAFE, OverallTime: 36.2s, OverallIterations: 21, TraceHistogramMax: 8, AutomataDifference: 10.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 63 SDtfs, 887 SDslu, 166 SDs, 0 SdLazy, 4261 SolverSat, 601 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1226 GetRequests, 543 SyntacticMatches, 43 SemanticMatches, 640 ConstructedPredicates, 0 IntricatePredicates, 8 DeprecatedPredicates, 5922 ImplicationChecksByTransitivity, 24.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=20, 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, 21 MinimizatonAttempts, 17 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.8s InterpolantComputationTime, 618 NumberOfCodeBlocks, 618 NumberOfCodeBlocksAsserted, 63 NumberOfCheckSat, 863 ConstructedInterpolants, 49 QuantifiedInterpolants, 202600 SizeOfPredicates, 176 NumberOfNonLiveVariables, 1869 ConjunctsInSsa, 531 ConjunctsInUnsatCore, 49 InterpolantComputations, 7 PerfectInterpolantSequences, 588/1870 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...