./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_find_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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_3e70cbb1-af9d-408c-9f10-61f996e3f566/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_3e70cbb1-af9d-408c-9f10-61f996e3f566/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3e70cbb1-af9d-408c-9f10-61f996e3f566/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3e70cbb1-af9d-408c-9f10-61f996e3f566/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_find_ground-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_3e70cbb1-af9d-408c-9f10-61f996e3f566/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3e70cbb1-af9d-408c-9f10-61f996e3f566/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ab52cff32fbc2a24c3f86164393e0a1d265859b9 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 11:38:22,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 11:38:22,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 11:38:22,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 11:38:22,939 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 11:38:22,940 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 11:38:22,941 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 11:38:22,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 11:38:22,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 11:38:22,944 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 11:38:22,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 11:38:22,945 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 11:38:22,945 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 11:38:22,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 11:38:22,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 11:38:22,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 11:38:22,948 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 11:38:22,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 11:38:22,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 11:38:22,951 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 11:38:22,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 11:38:22,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 11:38:22,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 11:38:22,954 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 11:38:22,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 11:38:22,956 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 11:38:22,956 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 11:38:22,956 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 11:38:22,957 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 11:38:22,957 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 11:38:22,957 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 11:38:22,958 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 11:38:22,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 11:38:22,958 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 11:38:22,959 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 11:38:22,959 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 11:38:22,960 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 11:38:22,960 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 11:38:22,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 11:38:22,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 11:38:22,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 11:38:22,961 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3e70cbb1-af9d-408c-9f10-61f996e3f566/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 11:38:22,971 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 11:38:22,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 11:38:22,972 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 11:38:22,972 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 11:38:22,972 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 11:38:22,973 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 11:38:22,973 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 11:38:22,973 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 11:38:22,973 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 11:38:22,973 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 11:38:22,973 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 11:38:22,973 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 11:38:22,973 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 11:38:22,974 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 11:38:22,974 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 11:38:22,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 11:38:22,974 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 11:38:22,974 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 11:38:22,974 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 11:38:22,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 11:38:22,975 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 11:38:22,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 11:38:22,975 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 11:38:22,975 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 11:38:22,975 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 11:38:22,975 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 11:38:22,975 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 11:38:22,975 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 11:38:22,976 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 11:38:22,976 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 11:38:22,976 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 11:38:22,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 11:38:22,976 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 11:38:22,976 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 11:38:22,976 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 11:38:22,976 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 11:38:22,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 11:38:22,976 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 11:38:22,977 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 11:38:22,977 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 11:38:22,977 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_3e70cbb1-af9d-408c-9f10-61f996e3f566/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 ! call(__VERIFIER_error())) ) 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 -> ab52cff32fbc2a24c3f86164393e0a1d265859b9 [2019-12-07 11:38:23,083 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 11:38:23,091 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 11:38:23,094 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 11:38:23,094 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 11:38:23,095 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 11:38:23,095 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3e70cbb1-af9d-408c-9f10-61f996e3f566/bin/utaipan/../../sv-benchmarks/c/array-examples/standard_find_ground-1.i [2019-12-07 11:38:23,133 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3e70cbb1-af9d-408c-9f10-61f996e3f566/bin/utaipan/data/8b3ca5fbb/768fddc631a248e0ab19d35b8b3fd977/FLAGf463a7d67 [2019-12-07 11:38:23,475 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 11:38:23,476 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3e70cbb1-af9d-408c-9f10-61f996e3f566/sv-benchmarks/c/array-examples/standard_find_ground-1.i [2019-12-07 11:38:23,480 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3e70cbb1-af9d-408c-9f10-61f996e3f566/bin/utaipan/data/8b3ca5fbb/768fddc631a248e0ab19d35b8b3fd977/FLAGf463a7d67 [2019-12-07 11:38:23,488 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3e70cbb1-af9d-408c-9f10-61f996e3f566/bin/utaipan/data/8b3ca5fbb/768fddc631a248e0ab19d35b8b3fd977 [2019-12-07 11:38:23,490 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 11:38:23,491 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 11:38:23,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 11:38:23,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 11:38:23,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 11:38:23,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 11:38:23" (1/1) ... [2019-12-07 11:38:23,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35f60ac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:38:23, skipping insertion in model container [2019-12-07 11:38:23,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 11:38:23" (1/1) ... [2019-12-07 11:38:23,502 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 11:38:23,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 11:38:23,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 11:38:23,646 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 11:38:23,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 11:38:23,670 INFO L208 MainTranslator]: Completed translation [2019-12-07 11:38:23,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:38:23 WrapperNode [2019-12-07 11:38:23,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 11:38:23,671 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 11:38:23,671 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 11:38:23,671 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 11:38:23,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:38:23" (1/1) ... [2019-12-07 11:38:23,681 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:38:23" (1/1) ... [2019-12-07 11:38:23,693 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 11:38:23,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 11:38:23,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 11:38:23,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 11:38:23,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:38:23" (1/1) ... [2019-12-07 11:38:23,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:38:23" (1/1) ... [2019-12-07 11:38:23,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:38:23" (1/1) ... [2019-12-07 11:38:23,701 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:38:23" (1/1) ... [2019-12-07 11:38:23,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:38:23" (1/1) ... [2019-12-07 11:38:23,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:38:23" (1/1) ... [2019-12-07 11:38:23,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:38:23" (1/1) ... [2019-12-07 11:38:23,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 11:38:23,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 11:38:23,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 11:38:23,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 11:38:23,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:38:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3e70cbb1-af9d-408c-9f10-61f996e3f566/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 11:38:23,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 11:38:23,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 11:38:23,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 11:38:23,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 11:38:23,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 11:38:23,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 11:38:23,915 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 11:38:23,915 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-12-07 11:38:23,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:38:23 BoogieIcfgContainer [2019-12-07 11:38:23,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 11:38:23,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 11:38:23,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 11:38:23,919 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 11:38:23,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 11:38:23" (1/3) ... [2019-12-07 11:38:23,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1153b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 11:38:23, skipping insertion in model container [2019-12-07 11:38:23,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:38:23" (2/3) ... [2019-12-07 11:38:23,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1153b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 11:38:23, skipping insertion in model container [2019-12-07 11:38:23,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:38:23" (3/3) ... [2019-12-07 11:38:23,921 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_find_ground-1.i [2019-12-07 11:38:23,927 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 11:38:23,931 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 11:38:23,938 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 11:38:23,952 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 11:38:23,952 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 11:38:23,952 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 11:38:23,952 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 11:38:23,953 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 11:38:23,953 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 11:38:23,953 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 11:38:23,953 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 11:38:23,962 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-12-07 11:38:23,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 11:38:23,965 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:38:23,966 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:38:23,966 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:38:23,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:38:23,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1412743100, now seen corresponding path program 1 times [2019-12-07 11:38:23,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:38:23,977 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230260607] [2019-12-07 11:38:23,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:38:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:38:24,066 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 11:38:24,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230260607] [2019-12-07 11:38:24,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:38:24,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 11:38:24,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015837002] [2019-12-07 11:38:24,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 11:38:24,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:38:24,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 11:38:24,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 11:38:24,080 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-12-07 11:38:24,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:38:24,096 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2019-12-07 11:38:24,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 11:38:24,097 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-12-07 11:38:24,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:38:24,103 INFO L225 Difference]: With dead ends: 21 [2019-12-07 11:38:24,103 INFO L226 Difference]: Without dead ends: 11 [2019-12-07 11:38:24,105 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 11:38:24,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-12-07 11:38:24,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-12-07 11:38:24,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 11:38:24,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2019-12-07 11:38:24,126 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2019-12-07 11:38:24,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:38:24,126 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2019-12-07 11:38:24,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 11:38:24,127 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2019-12-07 11:38:24,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 11:38:24,127 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:38:24,127 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:38:24,127 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:38:24,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:38:24,127 INFO L82 PathProgramCache]: Analyzing trace with hash 616700417, now seen corresponding path program 1 times [2019-12-07 11:38:24,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:38:24,128 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112841160] [2019-12-07 11:38:24,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:38:24,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:38:24,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:38:24,169 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112841160] [2019-12-07 11:38:24,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:38:24,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 11:38:24,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269839845] [2019-12-07 11:38:24,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 11:38:24,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:38:24,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 11:38:24,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 11:38:24,171 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 4 states. [2019-12-07 11:38:24,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:38:24,184 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2019-12-07 11:38:24,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 11:38:24,184 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-12-07 11:38:24,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:38:24,185 INFO L225 Difference]: With dead ends: 20 [2019-12-07 11:38:24,185 INFO L226 Difference]: Without dead ends: 13 [2019-12-07 11:38:24,186 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 11:38:24,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-12-07 11:38:24,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-12-07 11:38:24,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-12-07 11:38:24,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-12-07 11:38:24,188 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2019-12-07 11:38:24,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:38:24,188 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-12-07 11:38:24,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 11:38:24,188 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-12-07 11:38:24,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 11:38:24,189 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:38:24,189 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:38:24,189 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:38:24,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:38:24,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1587586118, now seen corresponding path program 1 times [2019-12-07 11:38:24,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:38:24,189 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133420390] [2019-12-07 11:38:24,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:38:24,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:38:24,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 11:38:24,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133420390] [2019-12-07 11:38:24,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411110832] [2019-12-07 11:38:24,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3e70cbb1-af9d-408c-9f10-61f996e3f566/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 11:38:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:38:24,253 INFO L264 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 11:38:24,257 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:38:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 11:38:24,272 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:38:24,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 11:38:24,284 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1192626864] [2019-12-07 11:38:24,299 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 11:38:24,300 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:38:24,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:38:24,308 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:38:24,308 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:38:24,588 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:38:25,072 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:38:25,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:38:25,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2019-12-07 11:38:25,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493192916] [2019-12-07 11:38:25,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 11:38:25,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:38:25,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 11:38:25,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-07 11:38:25,074 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 7 states. [2019-12-07 11:38:25,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:38:25,086 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2019-12-07 11:38:25,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 11:38:25,086 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-07 11:38:25,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:38:25,087 INFO L225 Difference]: With dead ends: 26 [2019-12-07 11:38:25,087 INFO L226 Difference]: Without dead ends: 16 [2019-12-07 11:38:25,088 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-07 11:38:25,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-12-07 11:38:25,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-12-07 11:38:25,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-12-07 11:38:25,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-12-07 11:38:25,091 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2019-12-07 11:38:25,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:38:25,091 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-12-07 11:38:25,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 11:38:25,091 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-12-07 11:38:25,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 11:38:25,092 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:38:25,092 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:38:25,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:38:25,293 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:38:25,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:38:25,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1580487328, now seen corresponding path program 2 times [2019-12-07 11:38:25,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:38:25,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532463802] [2019-12-07 11:38:25,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:38:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:38:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 11:38:25,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532463802] [2019-12-07 11:38:25,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634079965] [2019-12-07 11:38:25,420 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3e70cbb1-af9d-408c-9f10-61f996e3f566/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 11:38:25,462 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-07 11:38:25,462 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:38:25,463 INFO L264 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-07 11:38:25,465 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:38:25,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-07 11:38:25,526 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:38:25,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-07 11:38:25,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [174708880] [2019-12-07 11:38:25,602 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 11:38:25,602 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:38:25,602 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:38:25,602 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:38:25,602 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:38:25,743 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:38:26,220 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:38:26,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:38:26,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2019-12-07 11:38:26,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761118681] [2019-12-07 11:38:26,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-07 11:38:26,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:38:26,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-07 11:38:26,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2019-12-07 11:38:26,222 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 17 states. [2019-12-07 11:38:26,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:38:26,387 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-12-07 11:38:26,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 11:38:26,387 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2019-12-07 11:38:26,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:38:26,388 INFO L225 Difference]: With dead ends: 31 [2019-12-07 11:38:26,388 INFO L226 Difference]: Without dead ends: 21 [2019-12-07 11:38:26,389 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2019-12-07 11:38:26,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-12-07 11:38:26,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2019-12-07 11:38:26,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-12-07 11:38:26,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-12-07 11:38:26,391 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2019-12-07 11:38:26,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:38:26,391 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-12-07 11:38:26,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-07 11:38:26,392 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-12-07 11:38:26,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 11:38:26,392 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:38:26,392 INFO L410 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:38:26,592 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:38:26,593 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:38:26,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:38:26,593 INFO L82 PathProgramCache]: Analyzing trace with hash -253065401, now seen corresponding path program 1 times [2019-12-07 11:38:26,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:38:26,594 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290431757] [2019-12-07 11:38:26,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:38:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:38:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 11:38:26,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290431757] [2019-12-07 11:38:26,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959975899] [2019-12-07 11:38:26,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3e70cbb1-af9d-408c-9f10-61f996e3f566/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 11:38:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:38:26,747 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 11:38:26,748 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:38:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 11:38:26,800 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:38:26,876 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 11:38:26,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [689491612] [2019-12-07 11:38:26,878 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 11:38:26,878 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:38:26,878 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:38:26,878 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:38:26,878 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:38:27,028 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:38:27,473 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:38:27,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:38:27,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 17 [2019-12-07 11:38:27,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919357303] [2019-12-07 11:38:27,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-07 11:38:27,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:38:27,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-07 11:38:27,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2019-12-07 11:38:27,475 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 18 states. [2019-12-07 11:38:27,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:38:27,628 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2019-12-07 11:38:27,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 11:38:27,629 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2019-12-07 11:38:27,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:38:27,629 INFO L225 Difference]: With dead ends: 45 [2019-12-07 11:38:27,629 INFO L226 Difference]: Without dead ends: 28 [2019-12-07 11:38:27,630 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=326, Invalid=1156, Unknown=0, NotChecked=0, Total=1482 [2019-12-07 11:38:27,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-07 11:38:27,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-07 11:38:27,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 11:38:27,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-12-07 11:38:27,633 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 18 [2019-12-07 11:38:27,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:38:27,633 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-12-07 11:38:27,633 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-07 11:38:27,633 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-12-07 11:38:27,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-07 11:38:27,634 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:38:27,634 INFO L410 BasicCegarLoop]: trace histogram [12, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:38:27,834 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:38:27,835 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:38:27,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:38:27,836 INFO L82 PathProgramCache]: Analyzing trace with hash -633424248, now seen corresponding path program 2 times [2019-12-07 11:38:27,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:38:27,836 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045485899] [2019-12-07 11:38:27,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:38:27,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:38:27,964 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-12-07 11:38:27,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045485899] [2019-12-07 11:38:27,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826894070] [2019-12-07 11:38:27,964 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3e70cbb1-af9d-408c-9f10-61f996e3f566/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 11:38:27,995 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 11:38:27,995 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:38:27,996 INFO L264 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2019-12-07 11:38:27,997 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:38:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-12-07 11:38:28,096 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:38:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-12-07 11:38:28,213 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1891733480] [2019-12-07 11:38:28,214 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 11:38:28,214 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:38:28,214 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:38:28,214 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:38:28,215 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:38:28,346 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:38:28,705 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2019-12-07 11:38:29,256 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:38:29,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:38:29,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 8] total 29 [2019-12-07 11:38:29,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937103736] [2019-12-07 11:38:29,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-12-07 11:38:29,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:38:29,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-12-07 11:38:29,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2019-12-07 11:38:29,258 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 30 states. [2019-12-07 11:38:29,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:38:29,698 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2019-12-07 11:38:29,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-07 11:38:29,698 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 27 [2019-12-07 11:38:29,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:38:29,699 INFO L225 Difference]: With dead ends: 48 [2019-12-07 11:38:29,699 INFO L226 Difference]: Without dead ends: 34 [2019-12-07 11:38:29,700 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=451, Invalid=2629, Unknown=0, NotChecked=0, Total=3080 [2019-12-07 11:38:29,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-07 11:38:29,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-12-07 11:38:29,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-07 11:38:29,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-12-07 11:38:29,705 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2019-12-07 11:38:29,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:38:29,705 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-12-07 11:38:29,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-12-07 11:38:29,705 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-12-07 11:38:29,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-07 11:38:29,706 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:38:29,706 INFO L410 BasicCegarLoop]: trace histogram [13, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 11:38:29,907 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:38:29,907 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:38:29,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:38:29,908 INFO L82 PathProgramCache]: Analyzing trace with hash -313849389, now seen corresponding path program 3 times [2019-12-07 11:38:29,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:38:29,908 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907353977] [2019-12-07 11:38:29,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:38:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:38:30,016 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-12-07 11:38:30,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907353977] [2019-12-07 11:38:30,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739292593] [2019-12-07 11:38:30,017 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3e70cbb1-af9d-408c-9f10-61f996e3f566/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 11:38:30,047 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 11:38:30,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:38:30,048 INFO L264 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 11:38:30,049 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:38:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-12-07 11:38:30,105 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:38:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-12-07 11:38:30,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1984554548] [2019-12-07 11:38:30,165 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 11:38:30,165 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:38:30,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:38:30,166 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:38:30,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:38:30,275 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:38:30,626 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2019-12-07 11:38:31,120 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2019-12-07 11:38:31,304 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:38:31,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:38:31,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7] total 24 [2019-12-07 11:38:31,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326843191] [2019-12-07 11:38:31,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-07 11:38:31,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:38:31,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-07 11:38:31,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2019-12-07 11:38:31,308 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 25 states. [2019-12-07 11:38:31,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:38:31,956 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2019-12-07 11:38:31,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-07 11:38:31,957 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 31 [2019-12-07 11:38:31,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:38:31,958 INFO L225 Difference]: With dead ends: 60 [2019-12-07 11:38:31,958 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 11:38:31,960 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=452, Invalid=1710, Unknown=0, NotChecked=0, Total=2162 [2019-12-07 11:38:31,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 11:38:31,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-12-07 11:38:31,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-07 11:38:31,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-12-07 11:38:31,968 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 31 [2019-12-07 11:38:31,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:38:31,968 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-12-07 11:38:31,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-07 11:38:31,968 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-12-07 11:38:31,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-07 11:38:31,970 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:38:31,970 INFO L410 BasicCegarLoop]: trace histogram [14, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 11:38:32,171 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:38:32,172 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:38:32,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:38:32,172 INFO L82 PathProgramCache]: Analyzing trace with hash -591328398, now seen corresponding path program 4 times [2019-12-07 11:38:32,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:38:32,173 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051777641] [2019-12-07 11:38:32,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:38:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:38:32,294 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-12-07 11:38:32,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051777641] [2019-12-07 11:38:32,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482203501] [2019-12-07 11:38:32,294 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3e70cbb1-af9d-408c-9f10-61f996e3f566/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 11:38:32,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:38:32,325 INFO L264 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 11:38:32,326 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:38:32,334 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-12-07 11:38:32,334 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:38:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-12-07 11:38:32,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [840913307] [2019-12-07 11:38:32,568 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 11:38:32,568 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:38:32,568 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:38:32,568 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:38:32,568 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:38:32,677 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:38:33,115 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:38:33,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:38:33,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2019-12-07 11:38:33,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112679178] [2019-12-07 11:38:33,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-12-07 11:38:33,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:38:33,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-12-07 11:38:33,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=555, Invalid=1085, Unknown=0, NotChecked=0, Total=1640 [2019-12-07 11:38:33,117 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 33 states. [2019-12-07 11:38:33,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:38:33,147 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2019-12-07 11:38:33,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-07 11:38:33,147 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 34 [2019-12-07 11:38:33,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:38:33,148 INFO L225 Difference]: With dead ends: 70 [2019-12-07 11:38:33,148 INFO L226 Difference]: Without dead ends: 51 [2019-12-07 11:38:33,148 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=555, Invalid=1085, Unknown=0, NotChecked=0, Total=1640 [2019-12-07 11:38:33,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-12-07 11:38:33,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-12-07 11:38:33,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-12-07 11:38:33,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2019-12-07 11:38:33,152 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 34 [2019-12-07 11:38:33,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:38:33,153 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2019-12-07 11:38:33,153 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-12-07 11:38:33,153 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2019-12-07 11:38:33,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-12-07 11:38:33,154 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:38:33,154 INFO L410 BasicCegarLoop]: trace histogram [30, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 11:38:33,354 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:38:33,355 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:38:33,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:38:33,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1919425166, now seen corresponding path program 5 times [2019-12-07 11:38:33,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:38:33,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129723801] [2019-12-07 11:38:33,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:38:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:38:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-12-07 11:38:33,722 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129723801] [2019-12-07 11:38:33,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536727007] [2019-12-07 11:38:33,723 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3e70cbb1-af9d-408c-9f10-61f996e3f566/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 11:38:33,755 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-07 11:38:33,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:38:33,757 INFO L264 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 35 conjunts are in the unsatisfiable core [2019-12-07 11:38:33,759 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:38:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-12-07 11:38:34,062 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:38:34,481 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-12-07 11:38:34,481 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1545691736] [2019-12-07 11:38:34,482 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 11:38:34,483 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:38:34,483 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:38:34,483 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:38:34,483 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:38:34,595 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:38:35,300 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:38:35,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:38:35,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12, 13] total 55 [2019-12-07 11:38:35,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025482356] [2019-12-07 11:38:35,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-12-07 11:38:35,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:38:35,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-12-07 11:38:35,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=3362, Unknown=0, NotChecked=0, Total=4032 [2019-12-07 11:38:35,302 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 56 states. [2019-12-07 11:38:36,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:38:36,689 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2019-12-07 11:38:36,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-12-07 11:38:36,689 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 50 [2019-12-07 11:38:36,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:38:36,690 INFO L225 Difference]: With dead ends: 76 [2019-12-07 11:38:36,690 INFO L226 Difference]: Without dead ends: 57 [2019-12-07 11:38:36,693 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2370 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1881, Invalid=8625, Unknown=0, NotChecked=0, Total=10506 [2019-12-07 11:38:36,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-12-07 11:38:36,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2019-12-07 11:38:36,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-07 11:38:36,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2019-12-07 11:38:36,698 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2019-12-07 11:38:36,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:38:36,699 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2019-12-07 11:38:36,699 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-12-07 11:38:36,699 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2019-12-07 11:38:36,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-12-07 11:38:36,700 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:38:36,700 INFO L410 BasicCegarLoop]: trace histogram [31, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2019-12-07 11:38:36,900 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:38:36,901 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:38:36,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:38:36,901 INFO L82 PathProgramCache]: Analyzing trace with hash -604303307, now seen corresponding path program 6 times [2019-12-07 11:38:36,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:38:36,902 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72376782] [2019-12-07 11:38:36,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:38:36,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:38:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-12-07 11:38:36,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72376782] [2019-12-07 11:38:36,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549123760] [2019-12-07 11:38:36,998 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3e70cbb1-af9d-408c-9f10-61f996e3f566/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 11:38:37,043 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 11:38:37,043 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:38:37,044 INFO L264 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 11:38:37,046 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:38:37,086 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-12-07 11:38:37,086 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:38:37,114 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-12-07 11:38:37,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [665017477] [2019-12-07 11:38:37,115 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 11:38:37,115 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:38:37,116 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:38:37,116 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:38:37,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:38:37,223 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:38:37,642 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:38:37,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:38:37,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2019-12-07 11:38:37,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571005507] [2019-12-07 11:38:37,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 11:38:37,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:38:37,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 11:38:37,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2019-12-07 11:38:37,643 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 16 states. [2019-12-07 11:38:37,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:38:37,679 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2019-12-07 11:38:37,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 11:38:37,679 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 54 [2019-12-07 11:38:37,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:38:37,680 INFO L225 Difference]: With dead ends: 73 [2019-12-07 11:38:37,680 INFO L226 Difference]: Without dead ends: 57 [2019-12-07 11:38:37,680 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 141 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2019-12-07 11:38:37,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-12-07 11:38:37,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-12-07 11:38:37,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-12-07 11:38:37,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2019-12-07 11:38:37,684 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 54 [2019-12-07 11:38:37,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:38:37,684 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2019-12-07 11:38:37,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 11:38:37,684 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2019-12-07 11:38:37,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-12-07 11:38:37,685 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:38:37,685 INFO L410 BasicCegarLoop]: trace histogram [31, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2019-12-07 11:38:37,885 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:38:37,886 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:38:37,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:38:37,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1571302052, now seen corresponding path program 7 times [2019-12-07 11:38:37,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:38:37,886 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553583039] [2019-12-07 11:38:37,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:38:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:38:38,248 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-12-07 11:38:38,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553583039] [2019-12-07 11:38:38,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451651354] [2019-12-07 11:38:38,248 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3e70cbb1-af9d-408c-9f10-61f996e3f566/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 11:38:38,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:38:38,301 INFO L264 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-07 11:38:38,302 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:38:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-12-07 11:38:38,313 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:38:39,198 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-12-07 11:38:39,199 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1724500909] [2019-12-07 11:38:39,200 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 11:38:39,200 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:38:39,200 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:38:39,200 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:38:39,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:38:39,321 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:38:40,147 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2019-12-07 11:38:40,148 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:38:40,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:38:40,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2019-12-07 11:38:40,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985279170] [2019-12-07 11:38:40,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-12-07 11:38:40,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:38:40,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-12-07 11:38:40,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2238, Invalid=3312, Unknown=0, NotChecked=0, Total=5550 [2019-12-07 11:38:40,153 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 67 states. [2019-12-07 11:38:40,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:38:40,308 INFO L93 Difference]: Finished difference Result 114 states and 150 transitions. [2019-12-07 11:38:40,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-12-07 11:38:40,308 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 56 [2019-12-07 11:38:40,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:38:40,309 INFO L225 Difference]: With dead ends: 114 [2019-12-07 11:38:40,309 INFO L226 Difference]: Without dead ends: 90 [2019-12-07 11:38:40,310 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2238, Invalid=3312, Unknown=0, NotChecked=0, Total=5550 [2019-12-07 11:38:40,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-12-07 11:38:40,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-12-07 11:38:40,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-12-07 11:38:40,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2019-12-07 11:38:40,316 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 56 [2019-12-07 11:38:40,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:38:40,316 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2019-12-07 11:38:40,316 INFO L463 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-12-07 11:38:40,316 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2019-12-07 11:38:40,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-12-07 11:38:40,317 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:38:40,317 INFO L410 BasicCegarLoop]: trace histogram [64, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2019-12-07 11:38:40,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:38:40,518 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:38:40,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:38:40,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1637057398, now seen corresponding path program 8 times [2019-12-07 11:38:40,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:38:40,519 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857035662] [2019-12-07 11:38:40,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:38:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:38:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2115 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-12-07 11:38:41,792 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857035662] [2019-12-07 11:38:41,792 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001433395] [2019-12-07 11:38:41,792 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3e70cbb1-af9d-408c-9f10-61f996e3f566/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 11:38:41,835 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-07 11:38:41,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:38:41,836 INFO L264 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 39 conjunts are in the unsatisfiable core [2019-12-07 11:38:41,839 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:38:42,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2115 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2080 trivial. 0 not checked. [2019-12-07 11:38:42,889 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:38:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2115 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 2080 trivial. 0 not checked. [2019-12-07 11:38:43,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [138467142] [2019-12-07 11:38:43,580 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 11:38:43,580 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:38:43,581 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:38:43,581 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:38:43,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:38:43,690 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:38:44,352 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2019-12-07 11:38:45,096 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:38:45,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:38:45,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 14, 15] total 93 [2019-12-07 11:38:45,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146403809] [2019-12-07 11:38:45,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-12-07 11:38:45,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:38:45,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-12-07 11:38:45,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2376, Invalid=7926, Unknown=0, NotChecked=0, Total=10302 [2019-12-07 11:38:45,100 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 94 states. [2019-12-07 11:38:48,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:38:48,879 INFO L93 Difference]: Finished difference Result 120 states and 125 transitions. [2019-12-07 11:38:48,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2019-12-07 11:38:48,880 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 89 [2019-12-07 11:38:48,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:38:48,882 INFO L225 Difference]: With dead ends: 120 [2019-12-07 11:38:48,882 INFO L226 Difference]: Without dead ends: 96 [2019-12-07 11:38:48,889 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6133 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=7041, Invalid=23759, Unknown=0, NotChecked=0, Total=30800 [2019-12-07 11:38:48,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-12-07 11:38:48,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2019-12-07 11:38:48,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-12-07 11:38:48,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2019-12-07 11:38:48,900 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 89 [2019-12-07 11:38:48,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:38:48,900 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2019-12-07 11:38:48,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-12-07 11:38:48,901 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2019-12-07 11:38:48,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-12-07 11:38:48,902 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:38:48,902 INFO L410 BasicCegarLoop]: trace histogram [65, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2019-12-07 11:38:49,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:38:49,104 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:38:49,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:38:49,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1786774363, now seen corresponding path program 9 times [2019-12-07 11:38:49,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:38:49,105 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313003220] [2019-12-07 11:38:49,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:38:49,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:38:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-12-07 11:38:50,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313003220] [2019-12-07 11:38:50,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194941912] [2019-12-07 11:38:50,420 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3e70cbb1-af9d-408c-9f10-61f996e3f566/bin/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:38:50,478 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 11:38:50,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:38:50,479 INFO L264 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 11:38:50,481 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:38:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 26 proven. 20 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2019-12-07 11:38:50,736 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:38:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 26 proven. 20 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2019-12-07 11:38:50,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1025182879] [2019-12-07 11:38:50,995 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 11:38:50,995 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:38:50,995 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:38:50,995 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:38:50,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:38:51,097 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:38:52,522 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2019-12-07 11:38:52,524 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:38:52,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:38:52,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 11, 11] total 82 [2019-12-07 11:38:52,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919975277] [2019-12-07 11:38:52,525 INFO L442 AbstractCegarLoop]: Interpolant automaton has 83 states [2019-12-07 11:38:52,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:38:52,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2019-12-07 11:38:52,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2390, Invalid=5800, Unknown=0, NotChecked=0, Total=8190 [2019-12-07 11:38:52,527 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 83 states. [2019-12-07 11:38:54,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:38:54,586 INFO L93 Difference]: Finished difference Result 138 states and 143 transitions. [2019-12-07 11:38:54,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2019-12-07 11:38:54,586 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 93 [2019-12-07 11:38:54,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:38:54,587 INFO L225 Difference]: With dead ends: 138 [2019-12-07 11:38:54,587 INFO L226 Difference]: Without dead ends: 97 [2019-12-07 11:38:54,588 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 250 SyntacticMatches, 5 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4775 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=7208, Invalid=17284, Unknown=0, NotChecked=0, Total=24492 [2019-12-07 11:38:54,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-12-07 11:38:54,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2019-12-07 11:38:54,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-07 11:38:54,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2019-12-07 11:38:54,593 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 93 [2019-12-07 11:38:54,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:38:54,594 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2019-12-07 11:38:54,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 83 states. [2019-12-07 11:38:54,594 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2019-12-07 11:38:54,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-12-07 11:38:54,595 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:38:54,595 INFO L410 BasicCegarLoop]: trace histogram [66, 6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2019-12-07 11:38:54,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:38:54,795 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:38:54,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:38:54,796 INFO L82 PathProgramCache]: Analyzing trace with hash 153517188, now seen corresponding path program 10 times [2019-12-07 11:38:54,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:38:54,796 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069364214] [2019-12-07 11:38:54,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:38:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:38:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2267 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-12-07 11:38:56,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069364214] [2019-12-07 11:38:56,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912922854] [2019-12-07 11:38:56,162 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3e70cbb1-af9d-408c-9f10-61f996e3f566/bin/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:38:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:38:56,223 INFO L264 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 68 conjunts are in the unsatisfiable core [2019-12-07 11:38:56,225 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:38:56,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2267 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-12-07 11:38:56,246 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:38:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2267 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-12-07 11:38:59,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1549912113] [2019-12-07 11:38:59,972 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 11:38:59,972 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:38:59,973 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:38:59,973 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:38:59,973 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:39:00,071 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:39:01,059 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:39:01,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:39:01,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 136 [2019-12-07 11:39:01,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213461350] [2019-12-07 11:39:01,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 137 states [2019-12-07 11:39:01,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:39:01,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2019-12-07 11:39:01,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9343, Invalid=11537, Unknown=0, NotChecked=0, Total=20880 [2019-12-07 11:39:01,063 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 137 states. [2019-12-07 11:39:01,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:39:01,235 INFO L93 Difference]: Finished difference Result 194 states and 265 transitions. [2019-12-07 11:39:01,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2019-12-07 11:39:01,236 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 96 [2019-12-07 11:39:01,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:39:01,237 INFO L225 Difference]: With dead ends: 194 [2019-12-07 11:39:01,237 INFO L226 Difference]: Without dead ends: 165 [2019-12-07 11:39:01,238 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1877 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9343, Invalid=11537, Unknown=0, NotChecked=0, Total=20880 [2019-12-07 11:39:01,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-12-07 11:39:01,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2019-12-07 11:39:01,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-12-07 11:39:01,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2019-12-07 11:39:01,244 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 96 [2019-12-07 11:39:01,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:39:01,244 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2019-12-07 11:39:01,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 137 states. [2019-12-07 11:39:01,245 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2019-12-07 11:39:01,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-12-07 11:39:01,245 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:39:01,246 INFO L410 BasicCegarLoop]: trace histogram [134, 6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2019-12-07 11:39:01,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:39:01,446 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:39:01,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:39:01,447 INFO L82 PathProgramCache]: Analyzing trace with hash -118744316, now seen corresponding path program 11 times [2019-12-07 11:39:01,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:39:01,447 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511612214] [2019-12-07 11:39:01,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:39:01,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:39:06,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9101 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-12-07 11:39:06,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511612214] [2019-12-07 11:39:06,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767038623] [2019-12-07 11:39:06,614 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3e70cbb1-af9d-408c-9f10-61f996e3f566/bin/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:39:06,689 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-07 11:39:06,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:39:06,691 INFO L264 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjunts are in the unsatisfiable core [2019-12-07 11:39:06,693 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:39:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9101 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 9045 trivial. 0 not checked. [2019-12-07 11:39:07,591 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:39:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9101 backedges. 18 proven. 38 refuted. 0 times theorem prover too weak. 9045 trivial. 0 not checked. [2019-12-07 11:39:08,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [660346414] [2019-12-07 11:39:08,982 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 11:39:08,982 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:39:08,982 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:39:08,982 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:39:08,982 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:39:09,081 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:39:10,815 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2019-12-07 11:39:10,817 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:39:10,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:39:10,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 14, 14] total 158 [2019-12-07 11:39:10,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568961145] [2019-12-07 11:39:10,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 159 states [2019-12-07 11:39:10,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:39:10,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2019-12-07 11:39:10,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9469, Invalid=18253, Unknown=0, NotChecked=0, Total=27722 [2019-12-07 11:39:10,821 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand 159 states. [2019-12-07 11:40:02,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:40:02,401 INFO L93 Difference]: Finished difference Result 214 states and 221 transitions. [2019-12-07 11:40:02,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2019-12-07 11:40:02,401 INFO L78 Accepts]: Start accepts. Automaton has 159 states. Word has length 164 [2019-12-07 11:40:02,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:40:02,402 INFO L225 Difference]: With dead ends: 214 [2019-12-07 11:40:02,402 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 11:40:02,404 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 457 SyntacticMatches, 4 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19697 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=29559, Invalid=78352, Unknown=1, NotChecked=0, Total=107912 [2019-12-07 11:40:02,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 11:40:02,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 11:40:02,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 11:40:02,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 11:40:02,404 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 164 [2019-12-07 11:40:02,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:40:02,405 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 11:40:02,405 INFO L463 AbstractCegarLoop]: Interpolant automaton has 159 states. [2019-12-07 11:40:02,405 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 11:40:02,405 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 11:40:02,605 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:40:02,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 11:40:04,312 WARN L192 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 121 DAG size of output: 75 [2019-12-07 11:40:04,314 INFO L246 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2019-12-07 11:40:04,314 INFO L246 CegarLoopResult]: For program point L3-1(line 3) no Hoare annotation was computed. [2019-12-07 11:40:04,315 INFO L246 CegarLoopResult]: For program point L3-3(line 3) no Hoare annotation was computed. [2019-12-07 11:40:04,315 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 11:40:04,315 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2019-12-07 11:40:04,315 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 11:40:04,315 INFO L242 CegarLoopResult]: At program point L17-3(lines 17 19) the Hoare annotation is: (let ((.cse11 (select |#memory_int| |ULTIMATE.start_main_~#a~0.base|))) (let ((.cse4 (<= ULTIMATE.start_main_~i~0 3)) (.cse6 (= ULTIMATE.start_main_~x~0 1)) (.cse10 (<= ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~x~0)) (.cse0 (not (= ULTIMATE.start_main_~e~0 (select .cse11 (+ |ULTIMATE.start_main_~#a~0.offset| 8))))) (.cse8 (forall ((v_ULTIMATE.start_main_~x~0_93 Int)) (or (<= ULTIMATE.start_main_~i~0 v_ULTIMATE.start_main_~x~0_93) (not (= ULTIMATE.start_main_~e~0 (select (select |#memory_int| |ULTIMATE.start_main_~#a~0.base|) (+ (* v_ULTIMATE.start_main_~x~0_93 4) |ULTIMATE.start_main_~#a~0.offset|)))) (< v_ULTIMATE.start_main_~x~0_93 4)))) (.cse9 (not (= ULTIMATE.start_main_~e~0 (select .cse11 (+ |ULTIMATE.start_main_~#a~0.offset| 12))))) (.cse3 (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond))) (.cse7 (<= 2 ULTIMATE.start_main_~x~0)) (.cse14 (<= ULTIMATE.start_main_~i~0 1)) (.cse13 (<= ULTIMATE.start_main_~i~0 2)) (.cse2 (= |ULTIMATE.start_main_~#a~0.offset| 0)) (.cse1 (not (= ULTIMATE.start_main_~e~0 (select .cse11 (+ |ULTIMATE.start_main_~#a~0.offset| 4))))) (.cse12 (= ULTIMATE.start_main_~x~0 0)) (.cse5 (not (= ULTIMATE.start_main_~e~0 (select .cse11 |ULTIMATE.start_main_~#a~0.offset|))))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse5 .cse6) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse7) (and .cse0 .cse1 .cse2 (forall ((v_ULTIMATE.start_main_~x~0_93 Int)) (or (<= ULTIMATE.start_main_~i~0 v_ULTIMATE.start_main_~x~0_93) (not (= ULTIMATE.start_main_~e~0 (select (select |#memory_int| |ULTIMATE.start_main_~#a~0.base|) (+ (* v_ULTIMATE.start_main_~x~0_93 4) |ULTIMATE.start_main_~#a~0.offset|)))) (< v_ULTIMATE.start_main_~x~0_93 (+ ULTIMATE.start_main_~x~0 1)))) .cse3 .cse8 .cse5 .cse9 (or .cse10 (not (= (select .cse11 (+ |ULTIMATE.start_main_~#a~0.offset| (* ULTIMATE.start_main_~x~0 4))) ULTIMATE.start_main_~e~0)))) (and .cse0 .cse2 .cse1 .cse12 .cse4 .cse5) (and .cse13 .cse1 .cse2 .cse3 .cse5 .cse6) (and .cse2 .cse10 .cse3 .cse5 .cse14) (and .cse12 (= ULTIMATE.start_main_~i~0 0)) (and .cse0 .cse2 .cse1 .cse12 .cse8 .cse5 .cse9) (and .cse13 .cse1 .cse2 .cse3 .cse5 .cse7) (and .cse2 .cse12 .cse5 .cse14) (and .cse13 .cse2 .cse1 .cse12 .cse5)))) [2019-12-07 11:40:04,315 INFO L246 CegarLoopResult]: For program point L13-2(lines 13 15) no Hoare annotation was computed. [2019-12-07 11:40:04,315 INFO L246 CegarLoopResult]: For program point L13-4(lines 4 21) no Hoare annotation was computed. [2019-12-07 11:40:04,315 INFO L246 CegarLoopResult]: For program point L13-5(lines 13 15) no Hoare annotation was computed. [2019-12-07 11:40:04,315 INFO L242 CegarLoopResult]: At program point L9-3(lines 9 11) the Hoare annotation is: (and (= |ULTIMATE.start_main_~#a~0.offset| 0) (= ULTIMATE.start_main_~i~0 0)) [2019-12-07 11:40:04,327 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,328 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,328 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,329 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,329 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,329 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,330 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,330 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,330 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,333 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,334 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,334 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,334 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,335 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,335 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,335 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,335 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,336 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,336 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,336 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,336 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,337 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,337 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,337 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,337 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,337 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,338 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,338 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,338 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,338 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,338 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,339 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,339 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,339 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,339 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,339 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,339 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,340 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,344 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,344 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,344 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,344 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,345 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,345 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,345 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,346 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,346 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,348 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,349 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,349 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,349 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,349 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,349 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,350 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,350 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,350 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,350 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,351 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,351 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,351 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,351 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,351 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,352 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,352 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,352 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,352 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,352 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,352 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,353 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,353 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,353 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,353 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,353 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,353 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,353 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,353 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 11:40:04 BoogieIcfgContainer [2019-12-07 11:40:04,356 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 11:40:04,356 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 11:40:04,356 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 11:40:04,357 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 11:40:04,357 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:38:23" (3/4) ... [2019-12-07 11:40:04,359 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 11:40:04,366 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2019-12-07 11:40:04,366 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-12-07 11:40:04,366 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 11:40:04,394 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_3e70cbb1-af9d-408c-9f10-61f996e3f566/bin/utaipan/witness.graphml [2019-12-07 11:40:04,394 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 11:40:04,395 INFO L168 Benchmark]: Toolchain (without parser) took 100903.61 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 260.6 MB). Free memory was 939.9 MB in the beginning and 1.2 GB in the end (delta: -264.6 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:40:04,395 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 955.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:40:04,395 INFO L168 Benchmark]: CACSL2BoogieTranslator took 178.97 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 96.5 MB). Free memory was 939.9 MB in the beginning and 1.1 GB in the end (delta: -150.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-12-07 11:40:04,395 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.30 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 11:40:04,396 INFO L168 Benchmark]: Boogie Preprocessor took 14.77 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 11:40:04,396 INFO L168 Benchmark]: RCFGBuilder took 207.31 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: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. [2019-12-07 11:40:04,396 INFO L168 Benchmark]: TraceAbstraction took 100439.44 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 164.1 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -144.6 MB). Peak memory consumption was 461.7 MB. Max. memory is 11.5 GB. [2019-12-07 11:40:04,396 INFO L168 Benchmark]: Witness Printer took 37.48 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: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 11.5 GB. [2019-12-07 11:40:04,397 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 955.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 178.97 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 96.5 MB). Free memory was 939.9 MB in the beginning and 1.1 GB in the end (delta: -150.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 22.30 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 14.77 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 207.31 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: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 100439.44 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 164.1 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -144.6 MB). Peak memory consumption was 461.7 MB. Max. memory is 11.5 GB. * Witness Printer took 37.48 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: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 9]: Loop Invariant Derived loop invariant: a == 0 && i == 0 - InvariantResult [Line: 17]: Loop Invariant [2019-12-07 11:40:04,401 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,401 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,402 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,402 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,402 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,402 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,402 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,402 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,402 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,404 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,404 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,404 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,404 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,404 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,404 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,404 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,405 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,405 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,405 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,405 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,405 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,405 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,405 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,405 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,405 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,406 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,406 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,406 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,406 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,406 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,406 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,406 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,406 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,406 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,406 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,406 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,407 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,407 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,407 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,408 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,408 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,408 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,408 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,408 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,408 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,409 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,409 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~x~0_93,QUANTIFIED] [2019-12-07 11:40:04,410 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,410 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,410 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,410 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,410 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,410 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,410 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,411 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,411 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,411 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,411 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,411 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,411 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,411 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,411 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,411 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,411 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,412 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,412 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,412 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,412 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,412 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,412 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,412 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,412 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,412 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,412 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,413 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 11:40:04,413 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: ((((((((((((((((!(e == unknown-#memory_int-unknown[a][a + 8]) && !(e == unknown-#memory_int-unknown[a][a + 4])) && a == 0) && !(0 == cond)) && i <= 3) && 1 == cond) && !(e == unknown-#memory_int-unknown[a][a])) && x == 1) || ((((((!(e == unknown-#memory_int-unknown[a][a + 8]) && !(e == unknown-#memory_int-unknown[a][a + 4])) && a == 0) && !(0 == cond)) && i <= 3) && !(e == unknown-#memory_int-unknown[a][a])) && 2 <= x)) || ((((((((!(e == unknown-#memory_int-unknown[a][a + 8]) && !(e == unknown-#memory_int-unknown[a][a + 4])) && a == 0) && (forall v_ULTIMATE.start_main_~x~0_93 : int :: (i <= v_ULTIMATE.start_main_~x~0_93 || !(e == unknown-#memory_int-unknown[a][v_ULTIMATE.start_main_~x~0_93 * 4 + a])) || v_ULTIMATE.start_main_~x~0_93 < x + 1)) && !(0 == cond)) && (forall v_ULTIMATE.start_main_~x~0_93 : int :: (i <= v_ULTIMATE.start_main_~x~0_93 || !(e == unknown-#memory_int-unknown[a][v_ULTIMATE.start_main_~x~0_93 * 4 + a])) || v_ULTIMATE.start_main_~x~0_93 < 4)) && !(e == unknown-#memory_int-unknown[a][a])) && !(e == unknown-#memory_int-unknown[a][a + 12])) && (i <= x || !(unknown-#memory_int-unknown[a][a + x * 4] == e)))) || (((((!(e == unknown-#memory_int-unknown[a][a + 8]) && a == 0) && !(e == unknown-#memory_int-unknown[a][a + 4])) && x == 0) && i <= 3) && !(e == unknown-#memory_int-unknown[a][a]))) || (((((i <= 2 && !(e == unknown-#memory_int-unknown[a][a + 4])) && a == 0) && !(0 == cond)) && !(e == unknown-#memory_int-unknown[a][a])) && x == 1)) || ((((a == 0 && i <= x) && !(0 == cond)) && !(e == unknown-#memory_int-unknown[a][a])) && i <= 1)) || (x == 0 && i == 0)) || ((((((!(e == unknown-#memory_int-unknown[a][a + 8]) && a == 0) && !(e == unknown-#memory_int-unknown[a][a + 4])) && x == 0) && (forall v_ULTIMATE.start_main_~x~0_93 : int :: (i <= v_ULTIMATE.start_main_~x~0_93 || !(e == unknown-#memory_int-unknown[a][v_ULTIMATE.start_main_~x~0_93 * 4 + a])) || v_ULTIMATE.start_main_~x~0_93 < 4)) && !(e == unknown-#memory_int-unknown[a][a])) && !(e == unknown-#memory_int-unknown[a][a + 12]))) || (((((i <= 2 && !(e == unknown-#memory_int-unknown[a][a + 4])) && a == 0) && !(0 == cond)) && !(e == unknown-#memory_int-unknown[a][a])) && 2 <= x)) || (((a == 0 && x == 0) && !(e == unknown-#memory_int-unknown[a][a])) && i <= 1)) || ((((i <= 2 && a == 0) && !(e == unknown-#memory_int-unknown[a][a + 4])) && x == 0) && !(e == unknown-#memory_int-unknown[a][a])) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Result: SAFE, OverallTime: 98.6s, OverallIterations: 15, TraceHistogramMax: 134, AutomataDifference: 60.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.7s, HoareTripleCheckerStatistics: 140 SDtfs, 163 SDslu, 2250 SDs, 0 SdLazy, 5847 SolverSat, 601 SolverUnsat, 55 SolverUnknown, 0 SolverNotchecked, 40.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3055 GetRequests, 1821 SyntacticMatches, 18 SemanticMatches, 1216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38312 ImplicationChecksByTransitivity, 50.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=165occurred in iteration=14, 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, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 164 NumberOfFragments, 441 HoareAnnotationTreeSize, 2 FomulaSimplifications, 6044 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 1346 FormulaSimplificationTreeSizeReductionInter, 1.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 20.8s InterpolantComputationTime, 1490 NumberOfCodeBlocks, 1276 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 2186 ConstructedInterpolants, 32 QuantifiedInterpolants, 863173 SizeOfPredicates, 94 NumberOfNonLiveVariables, 2497 ConjunctsInSsa, 295 ConjunctsInUnsatCore, 41 InterpolantComputations, 2 PerfectInterpolantSequences, 30004/52681 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...