./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c --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_6ea24267-e8c4-460b-aed8-ea12f94277b9/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_6ea24267-e8c4-460b-aed8-ea12f94277b9/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6ea24267-e8c4-460b-aed8-ea12f94277b9/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6ea24267-e8c4-460b-aed8-ea12f94277b9/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c -s /tmp/vcloud-vcloud-master/worker/run_dir_6ea24267-e8c4-460b-aed8-ea12f94277b9/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6ea24267-e8c4-460b-aed8-ea12f94277b9/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 a4e278d158dd9e8a83bb0a2afcbaa26c6819a0f8 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 11:42:34,764 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 11:42:34,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 11:42:34,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 11:42:34,775 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 11:42:34,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 11:42:34,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 11:42:34,779 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 11:42:34,780 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 11:42:34,781 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 11:42:34,781 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 11:42:34,782 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 11:42:34,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 11:42:34,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 11:42:34,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 11:42:34,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 11:42:34,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 11:42:34,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 11:42:34,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 11:42:34,789 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 11:42:34,790 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 11:42:34,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 11:42:34,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 11:42:34,791 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 11:42:34,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 11:42:34,793 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 11:42:34,793 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 11:42:34,794 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 11:42:34,794 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 11:42:34,795 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 11:42:34,795 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 11:42:34,795 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 11:42:34,796 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 11:42:34,796 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 11:42:34,797 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 11:42:34,797 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 11:42:34,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 11:42:34,797 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 11:42:34,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 11:42:34,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 11:42:34,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 11:42:34,799 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6ea24267-e8c4-460b-aed8-ea12f94277b9/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2019-12-07 11:42:34,812 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 11:42:34,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 11:42:34,813 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 11:42:34,813 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 11:42:34,813 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 11:42:34,814 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 11:42:34,814 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 11:42:34,814 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 11:42:34,814 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 11:42:34,814 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 11:42:34,814 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 11:42:34,814 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 11:42:34,815 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 11:42:34,815 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 11:42:34,815 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 11:42:34,815 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 11:42:34,815 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 11:42:34,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 11:42:34,816 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 11:42:34,816 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 11:42:34,816 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 11:42:34,816 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 11:42:34,816 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 11:42:34,816 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-12-07 11:42:34,816 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-12-07 11:42:34,816 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-12-07 11:42:34,817 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 11:42:34,817 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 11:42:34,817 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 11:42:34,817 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 11:42:34,817 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 11:42:34,817 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 11:42:34,817 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 11:42:34,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 11:42:34,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 11:42:34,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 11:42:34,818 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 11:42:34,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 11:42:34,819 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 11:42:34,819 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 11:42:34,819 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_6ea24267-e8c4-460b-aed8-ea12f94277b9/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 -> a4e278d158dd9e8a83bb0a2afcbaa26c6819a0f8 [2019-12-07 11:42:34,924 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 11:42:34,934 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 11:42:34,937 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 11:42:34,938 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 11:42:34,939 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 11:42:34,939 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6ea24267-e8c4-460b-aed8-ea12f94277b9/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2019-12-07 11:42:34,977 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6ea24267-e8c4-460b-aed8-ea12f94277b9/bin/utaipan/data/e66b350b1/2e8e4c34619b4d79b34db56f01981405/FLAG0f917a404 [2019-12-07 11:42:35,370 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 11:42:35,371 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6ea24267-e8c4-460b-aed8-ea12f94277b9/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2019-12-07 11:42:35,374 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6ea24267-e8c4-460b-aed8-ea12f94277b9/bin/utaipan/data/e66b350b1/2e8e4c34619b4d79b34db56f01981405/FLAG0f917a404 [2019-12-07 11:42:35,383 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6ea24267-e8c4-460b-aed8-ea12f94277b9/bin/utaipan/data/e66b350b1/2e8e4c34619b4d79b34db56f01981405 [2019-12-07 11:42:35,385 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 11:42:35,385 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 11:42:35,386 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 11:42:35,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 11:42:35,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 11:42:35,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 11:42:35" (1/1) ... [2019-12-07 11:42:35,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a8ebb28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:42:35, skipping insertion in model container [2019-12-07 11:42:35,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 11:42:35" (1/1) ... [2019-12-07 11:42:35,396 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 11:42:35,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 11:42:35,543 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 11:42:35,549 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 11:42:35,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 11:42:35,573 INFO L208 MainTranslator]: Completed translation [2019-12-07 11:42:35,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:42:35 WrapperNode [2019-12-07 11:42:35,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 11:42:35,574 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 11:42:35,574 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 11:42:35,574 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 11:42:35,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:42:35" (1/1) ... [2019-12-07 11:42:35,585 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:42:35" (1/1) ... [2019-12-07 11:42:35,600 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 11:42:35,600 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 11:42:35,600 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 11:42:35,600 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 11:42:35,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:42:35" (1/1) ... [2019-12-07 11:42:35,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:42:35" (1/1) ... [2019-12-07 11:42:35,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:42:35" (1/1) ... [2019-12-07 11:42:35,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:42:35" (1/1) ... [2019-12-07 11:42:35,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:42:35" (1/1) ... [2019-12-07 11:42:35,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:42:35" (1/1) ... [2019-12-07 11:42:35,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:42:35" (1/1) ... [2019-12-07 11:42:35,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 11:42:35,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 11:42:35,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 11:42:35,618 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 11:42:35,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:42:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ea24267-e8c4-460b-aed8-ea12f94277b9/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 11:42:35,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 11:42:35,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 11:42:35,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 11:42:35,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 11:42:35,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 11:42:35,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 11:42:35,884 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 11:42:35,884 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-12-07 11:42:35,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:42:35 BoogieIcfgContainer [2019-12-07 11:42:35,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 11:42:35,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 11:42:35,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 11:42:35,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 11:42:35,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 11:42:35" (1/3) ... [2019-12-07 11:42:35,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d6d5ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 11:42:35, skipping insertion in model container [2019-12-07 11:42:35,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:42:35" (2/3) ... [2019-12-07 11:42:35,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d6d5ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 11:42:35, skipping insertion in model container [2019-12-07 11:42:35,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:42:35" (3/3) ... [2019-12-07 11:42:35,892 INFO L109 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength.c [2019-12-07 11:42:35,901 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 11:42:35,908 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-12-07 11:42:35,915 INFO L249 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-12-07 11:42:35,927 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 11:42:35,928 INFO L374 AbstractCegarLoop]: Hoare is false [2019-12-07 11:42:35,928 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 11:42:35,928 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 11:42:35,928 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 11:42:35,928 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 11:42:35,928 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 11:42:35,928 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 11:42:35,937 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-12-07 11:42:35,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 11:42:35,942 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:42:35,942 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 11:42:35,943 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 11:42:35,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:42:35,947 INFO L82 PathProgramCache]: Analyzing trace with hash 3121969, now seen corresponding path program 1 times [2019-12-07 11:42:35,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:42:35,953 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236874314] [2019-12-07 11:42:35,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:42:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:42:36,049 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 11:42:36,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236874314] [2019-12-07 11:42:36,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:42:36,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 11:42:36,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071411456] [2019-12-07 11:42:36,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 11:42:36,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:42:36,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 11:42:36,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 11:42:36,069 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-12-07 11:42:36,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:42:36,109 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2019-12-07 11:42:36,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 11:42:36,111 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-12-07 11:42:36,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:42:36,117 INFO L225 Difference]: With dead ends: 37 [2019-12-07 11:42:36,117 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 11:42:36,118 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 11:42:36,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 11:42:36,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2019-12-07 11:42:36,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 11:42:36,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-12-07 11:42:36,140 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2019-12-07 11:42:36,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:42:36,140 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-12-07 11:42:36,140 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 11:42:36,140 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-12-07 11:42:36,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 11:42:36,140 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:42:36,140 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 11:42:36,141 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 11:42:36,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:42:36,141 INFO L82 PathProgramCache]: Analyzing trace with hash 3050837, now seen corresponding path program 1 times [2019-12-07 11:42:36,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:42:36,141 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702682806] [2019-12-07 11:42:36,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:42:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:42:36,167 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 11:42:36,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702682806] [2019-12-07 11:42:36,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:42:36,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-07 11:42:36,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707167946] [2019-12-07 11:42:36,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 11:42:36,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:42:36,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 11:42:36,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 11:42:36,170 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2019-12-07 11:42:36,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:42:36,188 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2019-12-07 11:42:36,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 11:42:36,189 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-12-07 11:42:36,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:42:36,189 INFO L225 Difference]: With dead ends: 18 [2019-12-07 11:42:36,189 INFO L226 Difference]: Without dead ends: 18 [2019-12-07 11:42:36,190 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 11:42:36,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-12-07 11:42:36,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-12-07 11:42:36,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-12-07 11:42:36,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2019-12-07 11:42:36,193 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 4 [2019-12-07 11:42:36,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:42:36,193 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2019-12-07 11:42:36,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 11:42:36,193 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2019-12-07 11:42:36,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 11:42:36,194 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:42:36,194 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 11:42:36,194 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 11:42:36,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:42:36,194 INFO L82 PathProgramCache]: Analyzing trace with hash 3050838, now seen corresponding path program 1 times [2019-12-07 11:42:36,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:42:36,194 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123843164] [2019-12-07 11:42:36,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:42:36,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:42:36,226 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 11:42:36,226 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123843164] [2019-12-07 11:42:36,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:42:36,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-07 11:42:36,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368976954] [2019-12-07 11:42:36,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 11:42:36,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:42:36,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 11:42:36,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 11:42:36,227 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 3 states. [2019-12-07 11:42:36,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:42:36,248 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2019-12-07 11:42:36,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 11:42:36,248 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-12-07 11:42:36,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:42:36,249 INFO L225 Difference]: With dead ends: 25 [2019-12-07 11:42:36,249 INFO L226 Difference]: Without dead ends: 25 [2019-12-07 11:42:36,249 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 11:42:36,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-12-07 11:42:36,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2019-12-07 11:42:36,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 11:42:36,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2019-12-07 11:42:36,252 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 4 [2019-12-07 11:42:36,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:42:36,252 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2019-12-07 11:42:36,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 11:42:36,252 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2019-12-07 11:42:36,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 11:42:36,252 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:42:36,253 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 11:42:36,253 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 11:42:36,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:42:36,253 INFO L82 PathProgramCache]: Analyzing trace with hash 3048869, now seen corresponding path program 1 times [2019-12-07 11:42:36,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:42:36,253 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904929009] [2019-12-07 11:42:36,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:42:36,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:42:36,276 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 11:42:36,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904929009] [2019-12-07 11:42:36,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:42:36,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 11:42:36,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042387670] [2019-12-07 11:42:36,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 11:42:36,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:42:36,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 11:42:36,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 11:42:36,277 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand 4 states. [2019-12-07 11:42:36,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:42:36,320 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-12-07 11:42:36,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 11:42:36,321 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-12-07 11:42:36,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:42:36,321 INFO L225 Difference]: With dead ends: 38 [2019-12-07 11:42:36,321 INFO L226 Difference]: Without dead ends: 38 [2019-12-07 11:42:36,321 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 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 11:42:36,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-07 11:42:36,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 20. [2019-12-07 11:42:36,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 11:42:36,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-12-07 11:42:36,324 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2019-12-07 11:42:36,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:42:36,324 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-12-07 11:42:36,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 11:42:36,324 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-12-07 11:42:36,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 11:42:36,325 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:42:36,325 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:42:36,325 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 11:42:36,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:42:36,325 INFO L82 PathProgramCache]: Analyzing trace with hash 694595734, now seen corresponding path program 1 times [2019-12-07 11:42:36,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:42:36,325 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462167279] [2019-12-07 11:42:36,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:42:36,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:42:36,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:42:36,348 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462167279] [2019-12-07 11:42:36,349 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8618574] [2019-12-07 11:42:36,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ea24267-e8c4-460b-aed8-ea12f94277b9/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 11:42:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:42:36,376 INFO L264 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 11:42:36,379 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:42:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:42:36,394 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:42:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:42:36,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1732419512] [2019-12-07 11:42:36,421 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 11:42:36,421 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:42:36,425 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:42:36,429 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:42:36,430 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:42:36,600 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:36,623 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:42:36,781 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2019-12-07 11:42:36,941 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2019-12-07 11:42:37,061 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2019-12-07 11:42:37,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:42:37,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2019-12-07 11:42:37,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366835027] [2019-12-07 11:42:37,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 11:42:37,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:42:37,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 11:42:37,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2019-12-07 11:42:37,064 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 5 states. [2019-12-07 11:42:37,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:42:37,231 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-12-07 11:42:37,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 11:42:37,232 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-12-07 11:42:37,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:42:37,232 INFO L225 Difference]: With dead ends: 26 [2019-12-07 11:42:37,232 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 11:42:37,233 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2019-12-07 11:42:37,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 11:42:37,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-12-07 11:42:37,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-07 11:42:37,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2019-12-07 11:42:37,235 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 7 [2019-12-07 11:42:37,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:42:37,236 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2019-12-07 11:42:37,236 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 11:42:37,236 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2019-12-07 11:42:37,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 11:42:37,236 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:42:37,236 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-12-07 11:42:37,437 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:42:37,438 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 11:42:37,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:42:37,438 INFO L82 PathProgramCache]: Analyzing trace with hash 694522633, now seen corresponding path program 1 times [2019-12-07 11:42:37,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:42:37,439 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938612837] [2019-12-07 11:42:37,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:42:37,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:42:37,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:42:37,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938612837] [2019-12-07 11:42:37,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:42:37,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 11:42:37,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186680969] [2019-12-07 11:42:37,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 11:42:37,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:42:37,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 11:42:37,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 11:42:37,497 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 4 states. [2019-12-07 11:42:37,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:42:37,515 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2019-12-07 11:42:37,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 11:42:37,515 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-07 11:42:37,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:42:37,516 INFO L225 Difference]: With dead ends: 39 [2019-12-07 11:42:37,516 INFO L226 Difference]: Without dead ends: 39 [2019-12-07 11:42:37,516 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 11:42:37,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-12-07 11:42:37,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2019-12-07 11:42:37,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 11:42:37,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-12-07 11:42:37,519 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 7 [2019-12-07 11:42:37,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:42:37,519 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-12-07 11:42:37,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 11:42:37,519 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-12-07 11:42:37,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 11:42:37,519 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:42:37,519 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 11:42:37,520 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 11:42:37,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:42:37,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1666401205, now seen corresponding path program 1 times [2019-12-07 11:42:37,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:42:37,520 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845236162] [2019-12-07 11:42:37,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:42:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:42:37,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:42:37,577 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845236162] [2019-12-07 11:42:37,577 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218165688] [2019-12-07 11:42:37,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ea24267-e8c4-460b-aed8-ea12f94277b9/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 11:42:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:42:37,602 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 11:42:37,603 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:42:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:42:37,615 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:42:37,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:42:37,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [997307658] [2019-12-07 11:42:37,640 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 11:42:37,641 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:42:37,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:42:37,641 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:42:37,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:42:37,713 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:37,740 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:37,804 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:37,995 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:38,002 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:38,034 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:38,042 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:38,048 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:38,076 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:38,085 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:38,177 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:38,184 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:38,205 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:38,213 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:38,218 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:38,337 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:42:38,551 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 77 [2019-12-07 11:42:38,763 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 69 [2019-12-07 11:42:38,960 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 73 [2019-12-07 11:42:39,127 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2019-12-07 11:42:39,184 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:42:39,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:42:39,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 5 [2019-12-07 11:42:39,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961312083] [2019-12-07 11:42:39,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 11:42:39,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:42:39,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 11:42:39,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2019-12-07 11:42:39,185 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 7 states. [2019-12-07 11:42:39,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:42:39,250 INFO L93 Difference]: Finished difference Result 84 states and 102 transitions. [2019-12-07 11:42:39,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 11:42:39,250 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-07 11:42:39,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:42:39,251 INFO L225 Difference]: With dead ends: 84 [2019-12-07 11:42:39,251 INFO L226 Difference]: Without dead ends: 84 [2019-12-07 11:42:39,251 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-07 11:42:39,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-07 11:42:39,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2019-12-07 11:42:39,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-07 11:42:39,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 101 transitions. [2019-12-07 11:42:39,256 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 101 transitions. Word has length 10 [2019-12-07 11:42:39,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:42:39,256 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 101 transitions. [2019-12-07 11:42:39,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 11:42:39,256 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 101 transitions. [2019-12-07 11:42:39,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 11:42:39,257 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:42:39,257 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 11:42:39,457 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:42:39,458 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 11:42:39,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:42:39,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1666399236, now seen corresponding path program 1 times [2019-12-07 11:42:39,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:42:39,459 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498901321] [2019-12-07 11:42:39,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:42:39,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:42:39,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:42:39,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498901321] [2019-12-07 11:42:39,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523960658] [2019-12-07 11:42:39,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ea24267-e8c4-460b-aed8-ea12f94277b9/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 11:42:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:42:39,545 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 11:42:39,546 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:42:39,567 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 11:42:39,567 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:42:39,580 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 11:42:39,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [571949618] [2019-12-07 11:42:39,581 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 11:42:39,581 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:42:39,581 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:42:39,581 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:42:39,582 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:42:39,636 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:39,657 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:39,700 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:39,883 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:39,892 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:39,900 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:39,907 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:39,912 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:39,943 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:40,059 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:40,067 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:40,074 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:40,080 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:40,084 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:40,160 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:42:40,286 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2019-12-07 11:42:40,594 WARN L192 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2019-12-07 11:42:40,874 WARN L192 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 83 [2019-12-07 11:42:41,111 WARN L192 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2019-12-07 11:42:41,177 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:42:41,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:42:41,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2019-12-07 11:42:41,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257645443] [2019-12-07 11:42:41,177 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 11:42:41,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:42:41,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 11:42:41,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2019-12-07 11:42:41,178 INFO L87 Difference]: Start difference. First operand 71 states and 101 transitions. Second operand 10 states. [2019-12-07 11:42:41,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:42:41,287 INFO L93 Difference]: Finished difference Result 80 states and 106 transitions. [2019-12-07 11:42:41,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 11:42:41,288 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-07 11:42:41,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:42:41,290 INFO L225 Difference]: With dead ends: 80 [2019-12-07 11:42:41,290 INFO L226 Difference]: Without dead ends: 80 [2019-12-07 11:42:41,290 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2019-12-07 11:42:41,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-07 11:42:41,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2019-12-07 11:42:41,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-07 11:42:41,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 100 transitions. [2019-12-07 11:42:41,297 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 100 transitions. Word has length 10 [2019-12-07 11:42:41,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:42:41,297 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 100 transitions. [2019-12-07 11:42:41,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 11:42:41,297 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 100 transitions. [2019-12-07 11:42:41,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 11:42:41,298 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:42:41,298 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2019-12-07 11:42:41,498 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:42:41,499 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 11:42:41,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:42:41,500 INFO L82 PathProgramCache]: Analyzing trace with hash -499405208, now seen corresponding path program 2 times [2019-12-07 11:42:41,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:42:41,500 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331648996] [2019-12-07 11:42:41,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:42:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:42:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:42:41,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331648996] [2019-12-07 11:42:41,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298888703] [2019-12-07 11:42:41,570 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ea24267-e8c4-460b-aed8-ea12f94277b9/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 11:42:41,593 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-07 11:42:41,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:42:41,593 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 11:42:41,594 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:42:41,621 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 11:42:41,621 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:42:41,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 11:42:41,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2079199465] [2019-12-07 11:42:41,656 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 11:42:41,656 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:42:41,656 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:42:41,656 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:42:41,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:42:41,710 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:41,732 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:41,763 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:41,945 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:41,953 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:41,960 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:41,966 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:41,971 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:41,995 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:42,001 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:42,100 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:42,107 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:42,114 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:42,119 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:42,124 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:42,202 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:42:42,340 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2019-12-07 11:42:42,621 WARN L192 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2019-12-07 11:42:42,917 WARN L192 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 83 [2019-12-07 11:42:43,218 WARN L192 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2019-12-07 11:42:43,283 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:42:43,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:42:43,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 14 [2019-12-07 11:42:43,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492458553] [2019-12-07 11:42:43,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 11:42:43,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:42:43,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 11:42:43,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2019-12-07 11:42:43,284 INFO L87 Difference]: Start difference. First operand 72 states and 100 transitions. Second operand 14 states. [2019-12-07 11:42:43,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:42:43,538 INFO L93 Difference]: Finished difference Result 134 states and 174 transitions. [2019-12-07 11:42:43,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 11:42:43,539 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2019-12-07 11:42:43,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:42:43,540 INFO L225 Difference]: With dead ends: 134 [2019-12-07 11:42:43,540 INFO L226 Difference]: Without dead ends: 134 [2019-12-07 11:42:43,541 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2019-12-07 11:42:43,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-12-07 11:42:43,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 87. [2019-12-07 11:42:43,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-12-07 11:42:43,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 122 transitions. [2019-12-07 11:42:43,548 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 122 transitions. Word has length 13 [2019-12-07 11:42:43,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:42:43,548 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 122 transitions. [2019-12-07 11:42:43,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 11:42:43,548 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 122 transitions. [2019-12-07 11:42:43,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 11:42:43,549 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:42:43,549 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2019-12-07 11:42:43,749 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:42:43,750 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 11:42:43,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:42:43,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1046560043, now seen corresponding path program 1 times [2019-12-07 11:42:43,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:42:43,751 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212522629] [2019-12-07 11:42:43,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:42:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:42:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:42:43,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212522629] [2019-12-07 11:42:43,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641144568] [2019-12-07 11:42:43,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ea24267-e8c4-460b-aed8-ea12f94277b9/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 11:42:43,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:42:43,830 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 11:42:43,831 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:42:43,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:42:43,832 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:42:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:42:43,841 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1449635240] [2019-12-07 11:42:43,841 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 11:42:43,842 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:42:43,842 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:42:43,842 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:42:43,842 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:42:43,887 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:43,902 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:43,934 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:44,081 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:44,088 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:44,095 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:44,100 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:44,103 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:44,241 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:44,250 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:44,259 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:44,265 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:44,269 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:44,345 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:42:44,674 WARN L192 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2019-12-07 11:42:44,941 WARN L192 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 83 [2019-12-07 11:42:45,236 WARN L192 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2019-12-07 11:42:45,313 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:42:45,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:42:45,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2019-12-07 11:42:45,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314920540] [2019-12-07 11:42:45,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 11:42:45,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:42:45,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 11:42:45,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-12-07 11:42:45,315 INFO L87 Difference]: Start difference. First operand 87 states and 122 transitions. Second operand 5 states. [2019-12-07 11:42:45,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:42:45,343 INFO L93 Difference]: Finished difference Result 86 states and 115 transitions. [2019-12-07 11:42:45,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 11:42:45,344 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-12-07 11:42:45,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:42:45,345 INFO L225 Difference]: With dead ends: 86 [2019-12-07 11:42:45,345 INFO L226 Difference]: Without dead ends: 86 [2019-12-07 11:42:45,345 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-12-07 11:42:45,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-07 11:42:45,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-12-07 11:42:45,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-07 11:42:45,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 115 transitions. [2019-12-07 11:42:45,352 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 115 transitions. Word has length 14 [2019-12-07 11:42:45,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:42:45,352 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 115 transitions. [2019-12-07 11:42:45,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 11:42:45,352 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 115 transitions. [2019-12-07 11:42:45,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 11:42:45,353 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:42:45,353 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2019-12-07 11:42:45,554 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:42:45,555 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 11:42:45,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:42:45,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1046560044, now seen corresponding path program 1 times [2019-12-07 11:42:45,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:42:45,556 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851942394] [2019-12-07 11:42:45,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:42:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:42:45,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 11:42:45,636 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851942394] [2019-12-07 11:42:45,636 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687778500] [2019-12-07 11:42:45,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ea24267-e8c4-460b-aed8-ea12f94277b9/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 11:42:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:42:45,660 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-07 11:42:45,661 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:42:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 11:42:45,674 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:42:45,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 11:42:45,693 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1795714515] [2019-12-07 11:42:45,693 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 11:42:45,693 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:42:45,694 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:42:45,694 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:42:45,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:42:45,740 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:45,762 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:45,794 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:45,933 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:45,940 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:45,946 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:45,951 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:45,955 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:45,979 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:46,054 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:46,074 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:46,080 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:46,085 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:46,089 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:46,160 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:42:47,073 WARN L192 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2019-12-07 11:42:47,770 WARN L192 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 83 [2019-12-07 11:42:48,565 WARN L192 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2019-12-07 11:42:48,805 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2019-12-07 11:42:48,807 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:42:48,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:42:48,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 2, 2] total 9 [2019-12-07 11:42:48,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834025158] [2019-12-07 11:42:48,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 11:42:48,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:42:48,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 11:42:48,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2019-12-07 11:42:48,810 INFO L87 Difference]: Start difference. First operand 86 states and 115 transitions. Second operand 11 states. [2019-12-07 11:42:49,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:42:49,608 INFO L93 Difference]: Finished difference Result 120 states and 152 transitions. [2019-12-07 11:42:49,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 11:42:49,609 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-07 11:42:49,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:42:49,610 INFO L225 Difference]: With dead ends: 120 [2019-12-07 11:42:49,610 INFO L226 Difference]: Without dead ends: 120 [2019-12-07 11:42:49,612 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2019-12-07 11:42:49,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-12-07 11:42:49,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 79. [2019-12-07 11:42:49,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-12-07 11:42:49,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2019-12-07 11:42:49,623 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 14 [2019-12-07 11:42:49,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:42:49,623 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2019-12-07 11:42:49,624 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 11:42:49,624 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2019-12-07 11:42:49,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 11:42:49,626 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:42:49,626 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:42:49,826 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:42:49,828 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 11:42:49,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:42:49,828 INFO L82 PathProgramCache]: Analyzing trace with hash 46214387, now seen corresponding path program 1 times [2019-12-07 11:42:49,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:42:49,829 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893130209] [2019-12-07 11:42:49,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:42:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:42:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:42:49,889 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893130209] [2019-12-07 11:42:49,889 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107692047] [2019-12-07 11:42:49,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ea24267-e8c4-460b-aed8-ea12f94277b9/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 11:42:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:42:49,916 INFO L264 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 11:42:49,917 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:42:49,930 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 11:42:49,930 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:42:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 11:42:49,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [417347531] [2019-12-07 11:42:49,943 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 11:42:49,943 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:42:49,943 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:42:49,943 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:42:49,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:42:49,988 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:50,008 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:50,034 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:50,141 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:50,146 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:50,166 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:50,172 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:50,176 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:50,216 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:50,296 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:50,317 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:50,324 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:50,330 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:50,334 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:50,416 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:42:50,632 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 69 [2019-12-07 11:42:50,841 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 73 [2019-12-07 11:42:51,024 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2019-12-07 11:42:51,123 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:42:51,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:42:51,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2019-12-07 11:42:51,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473738613] [2019-12-07 11:42:51,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 11:42:51,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:42:51,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 11:42:51,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-07 11:42:51,124 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand 10 states. [2019-12-07 11:42:51,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:42:51,263 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2019-12-07 11:42:51,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 11:42:51,263 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-12-07 11:42:51,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:42:51,264 INFO L225 Difference]: With dead ends: 73 [2019-12-07 11:42:51,264 INFO L226 Difference]: Without dead ends: 73 [2019-12-07 11:42:51,264 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2019-12-07 11:42:51,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-12-07 11:42:51,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 51. [2019-12-07 11:42:51,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-12-07 11:42:51,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2019-12-07 11:42:51,267 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 16 [2019-12-07 11:42:51,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:42:51,268 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2019-12-07 11:42:51,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 11:42:51,268 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2019-12-07 11:42:51,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-07 11:42:51,268 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:42:51,268 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1] [2019-12-07 11:42:51,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:42:51,470 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 11:42:51,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:42:51,470 INFO L82 PathProgramCache]: Analyzing trace with hash 854347289, now seen corresponding path program 2 times [2019-12-07 11:42:51,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:42:51,471 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094327754] [2019-12-07 11:42:51,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:42:51,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:42:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 11:42:51,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094327754] [2019-12-07 11:42:51,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739282926] [2019-12-07 11:42:51,543 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ea24267-e8c4-460b-aed8-ea12f94277b9/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 11:42:51,563 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2019-12-07 11:42:51,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:42:51,563 INFO L264 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 11:42:51,564 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:42:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-12-07 11:42:51,591 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:42:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-12-07 11:42:51,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-12-07 11:42:51,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 12 [2019-12-07 11:42:51,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316052579] [2019-12-07 11:42:51,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 11:42:51,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:42:51,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 11:42:51,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2019-12-07 11:42:51,629 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 8 states. [2019-12-07 11:42:51,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:42:51,648 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2019-12-07 11:42:51,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 11:42:51,648 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2019-12-07 11:42:51,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:42:51,649 INFO L225 Difference]: With dead ends: 51 [2019-12-07 11:42:51,649 INFO L226 Difference]: Without dead ends: 51 [2019-12-07 11:42:51,649 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2019-12-07 11:42:51,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-12-07 11:42:51,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2019-12-07 11:42:51,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-07 11:42:51,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2019-12-07 11:42:51,651 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 25 [2019-12-07 11:42:51,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:42:51,651 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2019-12-07 11:42:51,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 11:42:51,651 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2019-12-07 11:42:51,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-07 11:42:51,652 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:42:51,652 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2019-12-07 11:42:51,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:42:51,853 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 11:42:51,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:42:51,853 INFO L82 PathProgramCache]: Analyzing trace with hash 688991571, now seen corresponding path program 1 times [2019-12-07 11:42:51,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:42:51,854 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198383183] [2019-12-07 11:42:51,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:42:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:42:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 11:42:51,922 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198383183] [2019-12-07 11:42:51,922 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222176648] [2019-12-07 11:42:51,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ea24267-e8c4-460b-aed8-ea12f94277b9/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 11:42:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:42:51,954 INFO L264 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 11:42:51,955 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:42:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 11:42:51,985 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:42:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 11:42:52,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [724964463] [2019-12-07 11:42:52,013 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-12-07 11:42:52,013 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:42:52,013 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:42:52,013 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:42:52,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:42:52,073 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:52,101 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:52,154 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:52,311 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:52,318 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:52,324 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:52,329 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:52,333 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:52,350 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:52,356 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:52,434 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:52,456 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:52,465 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:52,472 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:52,476 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:42:52,567 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:42:52,853 WARN L192 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2019-12-07 11:42:53,121 WARN L192 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 83 [2019-12-07 11:42:53,370 WARN L192 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2019-12-07 11:42:53,580 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:42:53,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:42:53,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2019-12-07 11:42:53,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126793666] [2019-12-07 11:42:53,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 11:42:53,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:42:53,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 11:42:53,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2019-12-07 11:42:53,582 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 14 states. [2019-12-07 11:42:53,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:42:53,983 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2019-12-07 11:42:53,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-07 11:42:53,984 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2019-12-07 11:42:53,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:42:53,984 INFO L225 Difference]: With dead ends: 84 [2019-12-07 11:42:53,984 INFO L226 Difference]: Without dead ends: 84 [2019-12-07 11:42:53,985 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=319, Invalid=1241, Unknown=0, NotChecked=0, Total=1560 [2019-12-07 11:42:53,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-07 11:42:53,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2019-12-07 11:42:53,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-07 11:42:53,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2019-12-07 11:42:53,988 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 27 [2019-12-07 11:42:53,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:42:53,988 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2019-12-07 11:42:53,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 11:42:53,988 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2019-12-07 11:42:53,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-12-07 11:42:53,990 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:42:53,990 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2019-12-07 11:42:54,190 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:42:54,191 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 11:42:54,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:42:54,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1315660181, now seen corresponding path program 2 times [2019-12-07 11:42:54,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:42:54,192 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601716926] [2019-12-07 11:42:54,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:42:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:42:54,267 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-07 11:42:54,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601716926] [2019-12-07 11:42:54,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757172934] [2019-12-07 11:42:54,267 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ea24267-e8c4-460b-aed8-ea12f94277b9/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 11:42:54,290 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2019-12-07 11:42:54,290 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:42:54,290 INFO L264 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 11:42:54,292 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:42:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2019-12-07 11:42:54,314 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:42:54,330 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2019-12-07 11:42:54,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-12-07 11:42:54,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [7] total 11 [2019-12-07 11:42:54,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478610316] [2019-12-07 11:42:54,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 11:42:54,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:42:54,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 11:42:54,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-07 11:42:54,331 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 6 states. [2019-12-07 11:42:54,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:42:54,344 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2019-12-07 11:42:54,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 11:42:54,344 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2019-12-07 11:42:54,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:42:54,344 INFO L225 Difference]: With dead ends: 55 [2019-12-07 11:42:54,344 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 11:42:54,345 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-07 11:42:54,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 11:42:54,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 11:42:54,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 11:42:54,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 11:42:54,345 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 42 [2019-12-07 11:42:54,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:42:54,345 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 11:42:54,345 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 11:42:54,345 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 11:42:54,346 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 11:42:54,546 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:42:54,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 11:42:54 BoogieIcfgContainer [2019-12-07 11:42:54,559 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 11:42:54,560 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 11:42:54,560 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 11:42:54,560 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 11:42:54,561 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:42:35" (3/4) ... [2019-12-07 11:42:54,571 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 11:42:54,592 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2019-12-07 11:42:54,593 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2019-12-07 11:42:54,593 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 11:42:54,622 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6ea24267-e8c4-460b-aed8-ea12f94277b9/bin/utaipan/witness.graphml [2019-12-07 11:42:54,622 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 11:42:54,623 INFO L168 Benchmark]: Toolchain (without parser) took 19237.34 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 300.9 MB). Free memory was 940.7 MB in the beginning and 1.2 GB in the end (delta: -254.5 MB). Peak memory consumption was 46.4 MB. Max. memory is 11.5 GB. [2019-12-07 11:42:54,623 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 955.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:42:54,623 INFO L168 Benchmark]: CACSL2BoogieTranslator took 187.32 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.9 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -150.2 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-12-07 11:42:54,623 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.79 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 11:42:54,623 INFO L168 Benchmark]: Boogie Preprocessor took 17.42 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 11:42:54,623 INFO L168 Benchmark]: RCFGBuilder took 267.27 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: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. [2019-12-07 11:42:54,624 INFO L168 Benchmark]: TraceAbstraction took 18673.67 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 205.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -150.5 MB). Peak memory consumption was 54.5 MB. Max. memory is 11.5 GB. [2019-12-07 11:42:54,624 INFO L168 Benchmark]: Witness Printer took 62.18 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 11.5 GB. [2019-12-07 11:42:54,625 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 955.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 187.32 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.9 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -150.2 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 25.79 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 17.42 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 267.27 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: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 18673.67 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 205.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -150.5 MB). Peak memory consumption was 54.5 MB. Max. memory is 11.5 GB. * Witness Printer took 62.18 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 15]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 23]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 23]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 8 error locations. Result: SAFE, OverallTime: 18.6s, OverallIterations: 15, TraceHistogramMax: 7, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 154 SDtfs, 866 SDslu, 220 SDs, 0 SdLazy, 827 SolverSat, 276 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 578 GetRequests, 365 SyntacticMatches, 12 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 10.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=9, 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, 15 MinimizatonAttempts, 223 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 379 NumberOfCodeBlocks, 319 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 522 ConstructedInterpolants, 1 QuantifiedInterpolants, 74111 SizeOfPredicates, 29 NumberOfNonLiveVariables, 925 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 35 InterpolantComputations, 9 PerfectInterpolantSequences, 550/842 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: OVERALL_TIME[ms]: 203, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 4, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 10, TOOLS_POST_TIME[ms]: 121, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 10, TOOLS_QUANTIFIERELIM_TIME[ms]: 117, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 46, FLUID_QUERY_TIME[ms]: 2, FLUID_QUERIES: 20, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME[ms]: 0, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME[ms]: 42, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME[ms]: 4, DOMAIN_ISBOTTOM_APPLICATIONS: 4, DOMAIN_ISBOTTOM_TIME[ms]: 5, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 117, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 116, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 2, PATH_EXPR_TIME[ms]: 2, REGEX_TO_DAG_TIME[ms]: 2, DAG_COMPRESSION_TIME[ms]: 5, DAG_COMPRESSION_PROCESSED_NODES: 38, DAG_COMPRESSION_RETAINED_NODES: 22, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...