./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/brs3f.c --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_92b6a61f-9598-486f-97c2-eafd422eb5b4/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_92b6a61f-9598-486f-97c2-eafd422eb5b4/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_92b6a61f-9598-486f-97c2-eafd422eb5b4/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_92b6a61f-9598-486f-97c2-eafd422eb5b4/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/brs3f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_92b6a61f-9598-486f-97c2-eafd422eb5b4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_92b6a61f-9598-486f-97c2-eafd422eb5b4/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 a1a7cbd6e991197932302f7777b8b708f1820cc0 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 16:55:09,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 16:55:09,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 16:55:09,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 16:55:09,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 16:55:09,083 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 16:55:09,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 16:55:09,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 16:55:09,087 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 16:55:09,088 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 16:55:09,088 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 16:55:09,089 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 16:55:09,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 16:55:09,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 16:55:09,091 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 16:55:09,092 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 16:55:09,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 16:55:09,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 16:55:09,094 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 16:55:09,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 16:55:09,097 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 16:55:09,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 16:55:09,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 16:55:09,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 16:55:09,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 16:55:09,100 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 16:55:09,101 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 16:55:09,101 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 16:55:09,101 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 16:55:09,102 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 16:55:09,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 16:55:09,102 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 16:55:09,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 16:55:09,103 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 16:55:09,104 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 16:55:09,104 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 16:55:09,104 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 16:55:09,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 16:55:09,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 16:55:09,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 16:55:09,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 16:55:09,106 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_92b6a61f-9598-486f-97c2-eafd422eb5b4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 16:55:09,116 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 16:55:09,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 16:55:09,117 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 16:55:09,117 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 16:55:09,117 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 16:55:09,117 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 16:55:09,117 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 16:55:09,117 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 16:55:09,117 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 16:55:09,118 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 16:55:09,118 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 16:55:09,118 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 16:55:09,118 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 16:55:09,118 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 16:55:09,118 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 16:55:09,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 16:55:09,119 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 16:55:09,119 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 16:55:09,119 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 16:55:09,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 16:55:09,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 16:55:09,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 16:55:09,120 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 16:55:09,120 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 16:55:09,120 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 16:55:09,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 16:55:09,120 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 16:55:09,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 16:55:09,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 16:55:09,121 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 16:55:09,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 16:55:09,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 16:55:09,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 16:55:09,122 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 16:55:09,122 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 16:55:09,122 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 16:55:09,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 16:55:09,122 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 16:55:09,122 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 16:55:09,123 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 16:55:09,123 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_92b6a61f-9598-486f-97c2-eafd422eb5b4/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 -> a1a7cbd6e991197932302f7777b8b708f1820cc0 [2019-12-07 16:55:09,235 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 16:55:09,246 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 16:55:09,248 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 16:55:09,250 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 16:55:09,250 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 16:55:09,250 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_92b6a61f-9598-486f-97c2-eafd422eb5b4/bin/utaipan/../../sv-benchmarks/c/array-fpi/brs3f.c [2019-12-07 16:55:09,296 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_92b6a61f-9598-486f-97c2-eafd422eb5b4/bin/utaipan/data/c76772e0a/d57c3ae271c9433e9e39df8ab40b4a0c/FLAG0651ea1cb [2019-12-07 16:55:09,758 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 16:55:09,758 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_92b6a61f-9598-486f-97c2-eafd422eb5b4/sv-benchmarks/c/array-fpi/brs3f.c [2019-12-07 16:55:09,762 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_92b6a61f-9598-486f-97c2-eafd422eb5b4/bin/utaipan/data/c76772e0a/d57c3ae271c9433e9e39df8ab40b4a0c/FLAG0651ea1cb [2019-12-07 16:55:09,771 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_92b6a61f-9598-486f-97c2-eafd422eb5b4/bin/utaipan/data/c76772e0a/d57c3ae271c9433e9e39df8ab40b4a0c [2019-12-07 16:55:09,773 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 16:55:09,773 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 16:55:09,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 16:55:09,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 16:55:09,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 16:55:09,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:55:09" (1/1) ... [2019-12-07 16:55:09,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@165689ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:55:09, skipping insertion in model container [2019-12-07 16:55:09,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:55:09" (1/1) ... [2019-12-07 16:55:09,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 16:55:09,794 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 16:55:09,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:55:09,938 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 16:55:09,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:55:09,966 INFO L208 MainTranslator]: Completed translation [2019-12-07 16:55:09,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:55:09 WrapperNode [2019-12-07 16:55:09,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 16:55:09,967 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 16:55:09,967 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 16:55:09,967 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 16:55:09,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:55:09" (1/1) ... [2019-12-07 16:55:09,978 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:55:09" (1/1) ... [2019-12-07 16:55:09,991 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 16:55:09,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 16:55:09,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 16:55:09,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 16:55:09,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:55:09" (1/1) ... [2019-12-07 16:55:09,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:55:09" (1/1) ... [2019-12-07 16:55:10,000 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:55:09" (1/1) ... [2019-12-07 16:55:10,000 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:55:09" (1/1) ... [2019-12-07 16:55:10,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:55:09" (1/1) ... [2019-12-07 16:55:10,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:55:09" (1/1) ... [2019-12-07 16:55:10,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:55:09" (1/1) ... [2019-12-07 16:55:10,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 16:55:10,012 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 16:55:10,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 16:55:10,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 16:55:10,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:55:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92b6a61f-9598-486f-97c2-eafd422eb5b4/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 16:55:10,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 16:55:10,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 16:55:10,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 16:55:10,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 16:55:10,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 16:55:10,051 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 16:55:10,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 16:55:10,238 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 16:55:10,238 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-12-07 16:55:10,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:55:10 BoogieIcfgContainer [2019-12-07 16:55:10,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 16:55:10,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 16:55:10,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 16:55:10,241 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 16:55:10,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 04:55:09" (1/3) ... [2019-12-07 16:55:10,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57632db7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 04:55:10, skipping insertion in model container [2019-12-07 16:55:10,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:55:09" (2/3) ... [2019-12-07 16:55:10,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57632db7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 04:55:10, skipping insertion in model container [2019-12-07 16:55:10,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:55:10" (3/3) ... [2019-12-07 16:55:10,243 INFO L109 eAbstractionObserver]: Analyzing ICFG brs3f.c [2019-12-07 16:55:10,249 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 16:55:10,254 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 16:55:10,261 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 16:55:10,275 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 16:55:10,275 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 16:55:10,275 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 16:55:10,276 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 16:55:10,276 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 16:55:10,276 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 16:55:10,276 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 16:55:10,276 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 16:55:10,284 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-12-07 16:55:10,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 16:55:10,289 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:55:10,290 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 16:55:10,290 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:55:10,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:55:10,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1709729686, now seen corresponding path program 1 times [2019-12-07 16:55:10,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:55:10,300 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359478850] [2019-12-07 16:55:10,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:55:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:55:10,405 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 16:55:10,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359478850] [2019-12-07 16:55:10,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:55:10,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 16:55:10,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887575574] [2019-12-07 16:55:10,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 16:55:10,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:55:10,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 16:55:10,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 16:55:10,420 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2019-12-07 16:55:10,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:55:10,445 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2019-12-07 16:55:10,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 16:55:10,447 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-12-07 16:55:10,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:55:10,453 INFO L225 Difference]: With dead ends: 18 [2019-12-07 16:55:10,453 INFO L226 Difference]: Without dead ends: 8 [2019-12-07 16:55:10,455 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 16:55:10,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-12-07 16:55:10,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-12-07 16:55:10,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-12-07 16:55:10,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-12-07 16:55:10,476 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2019-12-07 16:55:10,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:55:10,476 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-12-07 16:55:10,476 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 16:55:10,476 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-12-07 16:55:10,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 16:55:10,476 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:55:10,477 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:55:10,477 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:55:10,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:55:10,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1463694476, now seen corresponding path program 1 times [2019-12-07 16:55:10,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:55:10,477 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975299667] [2019-12-07 16:55:10,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:55:10,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:55:10,520 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 16:55:10,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975299667] [2019-12-07 16:55:10,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:55:10,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 16:55:10,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522002053] [2019-12-07 16:55:10,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 16:55:10,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:55:10,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 16:55:10,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 16:55:10,523 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2019-12-07 16:55:10,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:55:10,542 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2019-12-07 16:55:10,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 16:55:10,542 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-07 16:55:10,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:55:10,543 INFO L225 Difference]: With dead ends: 12 [2019-12-07 16:55:10,543 INFO L226 Difference]: Without dead ends: 9 [2019-12-07 16:55:10,543 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 16:55:10,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-12-07 16:55:10,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-12-07 16:55:10,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-12-07 16:55:10,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-12-07 16:55:10,546 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2019-12-07 16:55:10,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:55:10,546 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-12-07 16:55:10,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 16:55:10,546 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-12-07 16:55:10,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 16:55:10,547 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:55:10,547 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:55:10,547 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:55:10,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:55:10,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1870068243, now seen corresponding path program 1 times [2019-12-07 16:55:10,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:55:10,548 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321166289] [2019-12-07 16:55:10,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:55:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:55:10,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 16:55:10,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321166289] [2019-12-07 16:55:10,604 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233601376] [2019-12-07 16:55:10,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92b6a61f-9598-486f-97c2-eafd422eb5b4/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 16:55:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:55:10,633 INFO L264 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 16:55:10,637 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:55:10,691 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-07 16:55:10,691 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 16:55:10,697 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 16:55:10,697 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 16:55:10,698 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-12-07 16:55:10,713 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 16:55:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 16:55:10,729 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 16:55:10,748 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 16:55:10,764 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 16:55:10,765 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2019-12-07 16:55:10,766 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 16:55:10,767 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 16:55:10,776 INFO L614 ElimStorePlain]: treesize reduction 5, result has 68.8 percent of original size [2019-12-07 16:55:10,777 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-12-07 16:55:10,777 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:38, output treesize:11 [2019-12-07 16:55:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 16:55:10,796 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1331702974] [2019-12-07 16:55:10,817 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 16:55:10,817 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 16:55:10,822 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 16:55:10,827 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 16:55:10,828 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 16:55:10,981 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 16:55:10,999 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 16:55:11,023 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 16:55:11,031 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 16:55:11,038 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 16:55:11,045 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 16:55:11,063 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 16:55:11,154 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 16:55:11,263 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 16:55:11,354 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 16:55:11,614 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 16:55:11,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 16:55:11,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2019-12-07 16:55:11,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960023480] [2019-12-07 16:55:11,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 16:55:11,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:55:11,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 16:55:11,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2019-12-07 16:55:11,615 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 13 states. [2019-12-07 16:55:11,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:55:11,659 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2019-12-07 16:55:11,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 16:55:11,659 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 8 [2019-12-07 16:55:11,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:55:11,659 INFO L225 Difference]: With dead ends: 13 [2019-12-07 16:55:11,660 INFO L226 Difference]: Without dead ends: 10 [2019-12-07 16:55:11,660 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2019-12-07 16:55:11,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-12-07 16:55:11,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-12-07 16:55:11,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-12-07 16:55:11,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2019-12-07 16:55:11,662 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2019-12-07 16:55:11,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:55:11,663 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-12-07 16:55:11,663 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 16:55:11,663 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2019-12-07 16:55:11,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 16:55:11,663 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:55:11,663 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:55:11,864 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:55:11,864 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:55:11,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:55:11,865 INFO L82 PathProgramCache]: Analyzing trace with hash 2137497428, now seen corresponding path program 2 times [2019-12-07 16:55:11,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:55:11,866 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836255808] [2019-12-07 16:55:11,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:55:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:55:11,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:55:11,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836255808] [2019-12-07 16:55:11,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20949858] [2019-12-07 16:55:11,944 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92b6a61f-9598-486f-97c2-eafd422eb5b4/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 16:55:11,974 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-07 16:55:11,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:55:11,975 INFO L264 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 16:55:11,975 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:55:12,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:55:12,002 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 16:55:12,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:55:12,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [932771145] [2019-12-07 16:55:12,018 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 16:55:12,018 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 16:55:12,018 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 16:55:12,018 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 16:55:12,019 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 16:55:12,062 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 16:55:12,067 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 16:55:12,071 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 16:55:12,085 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 16:55:12,132 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 16:55:12,151 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 16:55:12,160 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 16:55:12,200 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 16:55:12,207 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 16:55:12,215 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 16:55:12,222 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 16:55:12,280 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 16:55:12,334 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 16:55:12,376 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 16:55:12,433 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 16:55:12,629 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 16:55:12,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 16:55:12,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2019-12-07 16:55:12,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152401527] [2019-12-07 16:55:12,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 16:55:12,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:55:12,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 16:55:12,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2019-12-07 16:55:12,630 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 10 states. [2019-12-07 16:55:12,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:55:12,664 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2019-12-07 16:55:12,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 16:55:12,664 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-07 16:55:12,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:55:12,665 INFO L225 Difference]: With dead ends: 17 [2019-12-07 16:55:12,665 INFO L226 Difference]: Without dead ends: 11 [2019-12-07 16:55:12,666 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2019-12-07 16:55:12,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-12-07 16:55:12,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-12-07 16:55:12,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 16:55:12,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-12-07 16:55:12,668 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2019-12-07 16:55:12,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:55:12,669 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-12-07 16:55:12,669 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 16:55:12,669 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-12-07 16:55:12,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 16:55:12,669 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:55:12,669 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 16:55:12,870 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:55:12,870 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:55:12,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:55:12,871 INFO L82 PathProgramCache]: Analyzing trace with hash 263264266, now seen corresponding path program 3 times [2019-12-07 16:55:12,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:55:12,872 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869383136] [2019-12-07 16:55:12,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:55:12,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:55:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:55:12,984 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-12-07 16:55:12,985 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 16:55:13,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 04:55:13 BoogieIcfgContainer [2019-12-07 16:55:13,012 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 16:55:13,013 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 16:55:13,013 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 16:55:13,013 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 16:55:13,013 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:55:10" (3/4) ... [2019-12-07 16:55:13,015 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 16:55:13,052 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_92b6a61f-9598-486f-97c2-eafd422eb5b4/bin/utaipan/witness.graphml [2019-12-07 16:55:13,052 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 16:55:13,053 INFO L168 Benchmark]: Toolchain (without parser) took 3279.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -191.3 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:55:13,053 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:55:13,053 INFO L168 Benchmark]: CACSL2BoogieTranslator took 192.66 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.4 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -145.5 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-12-07 16:55:13,054 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.33 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 16:55:13,054 INFO L168 Benchmark]: Boogie Preprocessor took 19.79 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:55:13,054 INFO L168 Benchmark]: RCFGBuilder took 227.40 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. [2019-12-07 16:55:13,054 INFO L168 Benchmark]: TraceAbstraction took 2772.85 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 45.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -75.6 MB). Peak memory consumption was 239.5 MB. Max. memory is 11.5 GB. [2019-12-07 16:55:13,054 INFO L168 Benchmark]: Witness Printer took 39.42 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. [2019-12-07 16:55:13,056 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 192.66 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.4 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -145.5 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 24.33 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 19.79 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 227.40 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2772.85 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 45.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -75.6 MB). Peak memory consumption was 239.5 MB. Max. memory is 11.5 GB. * Witness Printer took 39.42 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int N; [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] long long sum[1]; [L24] int *a = malloc(sizeof(int)*N); [L26] i=0 VAL [N=2] [L26] COND TRUE i