./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_cbe27c74-6353-41e8-ba6d-5c8cfe840e23/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_cbe27c74-6353-41e8-ba6d-5c8cfe840e23/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_cbe27c74-6353-41e8-ba6d-5c8cfe840e23/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_cbe27c74-6353-41e8-ba6d-5c8cfe840e23/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_cbe27c74-6353-41e8-ba6d-5c8cfe840e23/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_cbe27c74-6353-41e8-ba6d-5c8cfe840e23/bin-2019/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 1b149b3cef099476d14a8b122afb66552d0406eb .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.1.23-1dbac8b [2018-10-26 19:34:01,003 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 19:34:01,005 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 19:34:01,014 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 19:34:01,015 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 19:34:01,016 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 19:34:01,016 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 19:34:01,018 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 19:34:01,019 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 19:34:01,020 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 19:34:01,021 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 19:34:01,021 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 19:34:01,022 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 19:34:01,023 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 19:34:01,024 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 19:34:01,025 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 19:34:01,026 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 19:34:01,027 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 19:34:01,029 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 19:34:01,038 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 19:34:01,039 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 19:34:01,040 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 19:34:01,046 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 19:34:01,047 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 19:34:01,047 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 19:34:01,048 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 19:34:01,048 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 19:34:01,049 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 19:34:01,049 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 19:34:01,050 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 19:34:01,050 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 19:34:01,051 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 19:34:01,051 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 19:34:01,051 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 19:34:01,052 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 19:34:01,053 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 19:34:01,053 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_cbe27c74-6353-41e8-ba6d-5c8cfe840e23/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-26 19:34:01,078 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 19:34:01,079 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 19:34:01,080 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 19:34:01,080 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-26 19:34:01,080 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-26 19:34:01,080 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-26 19:34:01,081 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-26 19:34:01,081 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-26 19:34:01,081 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-26 19:34:01,081 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-26 19:34:01,081 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-26 19:34:01,082 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 19:34:01,082 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 19:34:01,082 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 19:34:01,082 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 19:34:01,082 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 19:34:01,082 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 19:34:01,082 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 19:34:01,083 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 19:34:01,083 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 19:34:01,083 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 19:34:01,083 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 19:34:01,083 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 19:34:01,083 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 19:34:01,083 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 19:34:01,084 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 19:34:01,084 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 19:34:01,084 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 19:34:01,084 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 19:34:01,084 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 19:34:01,084 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-26 19:34:01,084 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 19:34:01,085 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 19:34:01,085 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 19:34:01,085 INFO L133 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/working_dir_cbe27c74-6353-41e8-ba6d-5c8cfe840e23/bin-2019/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 -> 1b149b3cef099476d14a8b122afb66552d0406eb [2018-10-26 19:34:01,111 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 19:34:01,121 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 19:34:01,124 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 19:34:01,125 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 19:34:01,125 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 19:34:01,126 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_cbe27c74-6353-41e8-ba6d-5c8cfe840e23/bin-2019/utaipan/../../sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i [2018-10-26 19:34:01,169 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cbe27c74-6353-41e8-ba6d-5c8cfe840e23/bin-2019/utaipan/data/25b688b6d/f4ddea5870c240ba86a826e79b108724/FLAG2ac824ff6 [2018-10-26 19:34:01,552 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 19:34:01,552 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_cbe27c74-6353-41e8-ba6d-5c8cfe840e23/sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i [2018-10-26 19:34:01,557 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cbe27c74-6353-41e8-ba6d-5c8cfe840e23/bin-2019/utaipan/data/25b688b6d/f4ddea5870c240ba86a826e79b108724/FLAG2ac824ff6 [2018-10-26 19:34:01,567 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_cbe27c74-6353-41e8-ba6d-5c8cfe840e23/bin-2019/utaipan/data/25b688b6d/f4ddea5870c240ba86a826e79b108724 [2018-10-26 19:34:01,570 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 19:34:01,570 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-26 19:34:01,571 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 19:34:01,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 19:34:01,575 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 19:34:01,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:34:01" (1/1) ... [2018-10-26 19:34:01,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38e84b0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:34:01, skipping insertion in model container [2018-10-26 19:34:01,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:34:01" (1/1) ... [2018-10-26 19:34:01,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 19:34:01,603 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 19:34:01,721 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 19:34:01,724 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 19:34:01,737 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 19:34:01,747 INFO L193 MainTranslator]: Completed translation [2018-10-26 19:34:01,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:34:01 WrapperNode [2018-10-26 19:34:01,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 19:34:01,748 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 19:34:01,748 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 19:34:01,748 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 19:34:01,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:34:01" (1/1) ... [2018-10-26 19:34:01,761 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:34:01" (1/1) ... [2018-10-26 19:34:01,766 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 19:34:01,767 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 19:34:01,767 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 19:34:01,767 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 19:34:01,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:34:01" (1/1) ... [2018-10-26 19:34:01,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:34:01" (1/1) ... [2018-10-26 19:34:01,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:34:01" (1/1) ... [2018-10-26 19:34:01,777 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:34:01" (1/1) ... [2018-10-26 19:34:01,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:34:01" (1/1) ... [2018-10-26 19:34:01,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:34:01" (1/1) ... [2018-10-26 19:34:01,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:34:01" (1/1) ... [2018-10-26 19:34:01,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 19:34:01,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 19:34:01,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 19:34:01,788 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 19:34:01,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:34:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cbe27c74-6353-41e8-ba6d-5c8cfe840e23/bin-2019/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 [2018-10-26 19:34:01,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 19:34:01,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 19:34:01,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 19:34:01,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 19:34:01,911 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 19:34:01,911 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 19:34:01,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-26 19:34:01,911 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-26 19:34:02,224 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 19:34:02,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:34:02 BoogieIcfgContainer [2018-10-26 19:34:02,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 19:34:02,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 19:34:02,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 19:34:02,231 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 19:34:02,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:34:01" (1/3) ... [2018-10-26 19:34:02,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0242f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:34:02, skipping insertion in model container [2018-10-26 19:34:02,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:34:01" (2/3) ... [2018-10-26 19:34:02,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0242f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:34:02, skipping insertion in model container [2018-10-26 19:34:02,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:34:02" (3/3) ... [2018-10-26 19:34:02,236 INFO L112 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i [2018-10-26 19:34:02,246 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 19:34:02,254 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 19:34:02,271 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 19:34:02,321 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 19:34:02,322 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 19:34:02,322 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 19:34:02,322 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 19:34:02,322 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 19:34:02,322 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 19:34:02,322 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 19:34:02,322 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 19:34:02,354 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-10-26 19:34:02,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-26 19:34:02,360 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:34:02,361 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:34:02,379 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:34:02,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:34:02,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1713253442, now seen corresponding path program 1 times [2018-10-26 19:34:02,394 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 19:34:02,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:34:02,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:34:02,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:34:02,447 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 19:34:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:34:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:34:02,528 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:34:02,529 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 19:34:02,529 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 19:34:02,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-26 19:34:02,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-26 19:34:02,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 19:34:02,552 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-10-26 19:34:02,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:34:02,579 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-10-26 19:34:02,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-26 19:34:02,581 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-26 19:34:02,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:34:02,591 INFO L225 Difference]: With dead ends: 31 [2018-10-26 19:34:02,593 INFO L226 Difference]: Without dead ends: 14 [2018-10-26 19:34:02,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 19:34:02,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-26 19:34:02,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-26 19:34:02,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-26 19:34:02,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-10-26 19:34:02,632 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-10-26 19:34:02,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:34:02,633 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-10-26 19:34:02,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-26 19:34:02,633 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-10-26 19:34:02,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-26 19:34:02,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:34:02,634 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:34:02,634 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:34:02,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:34:02,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1143179357, now seen corresponding path program 1 times [2018-10-26 19:34:02,635 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 19:34:02,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:34:02,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:34:02,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:34:02,636 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 19:34:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:34:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:34:02,735 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:34:02,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 19:34:02,735 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 19:34:02,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 19:34:02,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 19:34:02,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 19:34:02,738 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2018-10-26 19:34:02,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:34:02,818 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-10-26 19:34:02,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 19:34:02,819 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-10-26 19:34:02,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:34:02,819 INFO L225 Difference]: With dead ends: 21 [2018-10-26 19:34:02,819 INFO L226 Difference]: Without dead ends: 16 [2018-10-26 19:34:02,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-26 19:34:02,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-26 19:34:02,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-26 19:34:02,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-26 19:34:02,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-10-26 19:34:02,824 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2018-10-26 19:34:02,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:34:02,824 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-10-26 19:34:02,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 19:34:02,825 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-10-26 19:34:02,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-26 19:34:02,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:34:02,827 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:34:02,827 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:34:02,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:34:02,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1652058138, now seen corresponding path program 1 times [2018-10-26 19:34:02,828 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 19:34:02,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:34:02,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:34:02,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:34:02,829 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 19:34:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:34:02,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:34:02,873 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:34:02,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 19:34:02,873 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 19:34:02,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 19:34:02,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 19:34:02,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 19:34:02,874 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 3 states. [2018-10-26 19:34:02,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:34:02,910 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-10-26 19:34:02,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 19:34:02,911 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2018-10-26 19:34:02,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:34:02,912 INFO L225 Difference]: With dead ends: 27 [2018-10-26 19:34:02,912 INFO L226 Difference]: Without dead ends: 18 [2018-10-26 19:34:02,912 INFO L605 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 [2018-10-26 19:34:02,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-26 19:34:02,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-10-26 19:34:02,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-26 19:34:02,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-26 19:34:02,917 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2018-10-26 19:34:02,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:34:02,917 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-26 19:34:02,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 19:34:02,917 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-26 19:34:02,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-26 19:34:02,918 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:34:02,918 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:34:02,918 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:34:02,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:34:02,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1833562532, now seen corresponding path program 1 times [2018-10-26 19:34:02,919 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 19:34:02,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:34:02,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:34:02,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:34:02,920 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 19:34:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:34:03,221 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2018-10-26 19:34:03,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:34:03,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:34:03,396 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 19:34:03,397 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-10-26 19:34:03,399 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [18], [20], [26], [29], [31], [37], [38], [39], [41] [2018-10-26 19:34:03,440 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 19:34:03,440 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 19:34:03,539 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-26 19:34:03,806 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-26 19:34:03,811 INFO L272 AbstractInterpreter]: Visited 14 different actions 148 times. Merged at 5 different actions 75 times. Widened at 1 different actions 11 times. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2018-10-26 19:34:03,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:34:03,865 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-26 19:34:03,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:34:03,865 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cbe27c74-6353-41e8-ba6d-5c8cfe840e23/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 19:34:03,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:34:03,874 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-26 19:34:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:34:03,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:34:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:34:04,120 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 19:34:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:34:04,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 19:34:04,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2018-10-26 19:34:04,438 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 19:34:04,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-26 19:34:04,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-26 19:34:04,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2018-10-26 19:34:04,439 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 12 states. [2018-10-26 19:34:04,791 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2018-10-26 19:34:05,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:34:05,002 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-10-26 19:34:05,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-26 19:34:05,003 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2018-10-26 19:34:05,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:34:05,004 INFO L225 Difference]: With dead ends: 30 [2018-10-26 19:34:05,004 INFO L226 Difference]: Without dead ends: 24 [2018-10-26 19:34:05,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2018-10-26 19:34:05,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-26 19:34:05,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-26 19:34:05,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-26 19:34:05,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-10-26 19:34:05,008 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 15 [2018-10-26 19:34:05,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:34:05,008 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-10-26 19:34:05,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-26 19:34:05,009 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-10-26 19:34:05,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-26 19:34:05,011 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:34:05,011 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:34:05,012 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:34:05,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:34:05,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1892022867, now seen corresponding path program 1 times [2018-10-26 19:34:05,012 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 19:34:05,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:34:05,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:34:05,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:34:05,014 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 19:34:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:34:05,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:34:05,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:34:05,056 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 19:34:05,057 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-10-26 19:34:05,057 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [16], [18], [20], [26], [29], [31], [37], [38], [39], [41] [2018-10-26 19:34:05,058 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 19:34:05,058 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 19:34:05,062 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-26 19:34:05,311 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-26 19:34:05,311 INFO L272 AbstractInterpreter]: Visited 15 different actions 165 times. Merged at 6 different actions 76 times. Widened at 1 different actions 10 times. Found 14 fixpoints after 2 different actions. Largest state had 5 variables. [2018-10-26 19:34:05,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:34:05,345 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-26 19:34:05,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:34:05,346 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cbe27c74-6353-41e8-ba6d-5c8cfe840e23/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 19:34:05,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:34:05,353 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-26 19:34:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:34:05,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:34:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:34:05,367 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 19:34:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:34:05,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 19:34:05,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2018-10-26 19:34:05,414 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 19:34:05,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:34:05,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:34:05,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 19:34:05,416 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states. [2018-10-26 19:34:05,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:34:05,450 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2018-10-26 19:34:05,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:34:05,451 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2018-10-26 19:34:05,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:34:05,452 INFO L225 Difference]: With dead ends: 33 [2018-10-26 19:34:05,452 INFO L226 Difference]: Without dead ends: 24 [2018-10-26 19:34:05,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 19:34:05,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-26 19:34:05,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-26 19:34:05,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-26 19:34:05,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-10-26 19:34:05,460 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2018-10-26 19:34:05,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:34:05,460 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-10-26 19:34:05,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:34:05,460 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-10-26 19:34:05,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-26 19:34:05,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:34:05,461 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:34:05,461 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:34:05,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:34:05,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1658992628, now seen corresponding path program 2 times [2018-10-26 19:34:05,462 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 19:34:05,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:34:05,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:34:05,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:34:05,463 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 19:34:05,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:34:05,506 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:34:05,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:34:05,506 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 19:34:05,507 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 19:34:05,507 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 19:34:05,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:34:05,507 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cbe27c74-6353-41e8-ba6d-5c8cfe840e23/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 19:34:05,514 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 19:34:05,514 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-26 19:34:05,524 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-26 19:34:05,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 19:34:05,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:34:05,530 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:34:05,530 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 19:34:05,555 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:34:05,573 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 19:34:05,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2018-10-26 19:34:05,574 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 19:34:05,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 19:34:05,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 19:34:05,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 19:34:05,575 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 5 states. [2018-10-26 19:34:05,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:34:05,618 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2018-10-26 19:34:05,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 19:34:05,619 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-10-26 19:34:05,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:34:05,619 INFO L225 Difference]: With dead ends: 35 [2018-10-26 19:34:05,620 INFO L226 Difference]: Without dead ends: 26 [2018-10-26 19:34:05,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 19:34:05,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-26 19:34:05,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-10-26 19:34:05,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-26 19:34:05,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-26 19:34:05,624 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2018-10-26 19:34:05,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:34:05,624 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-26 19:34:05,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 19:34:05,625 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-26 19:34:05,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-26 19:34:05,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:34:05,625 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:34:05,626 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:34:05,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:34:05,626 INFO L82 PathProgramCache]: Analyzing trace with hash 849646002, now seen corresponding path program 2 times [2018-10-26 19:34:05,626 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 19:34:05,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:34:05,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 19:34:05,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:34:05,627 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 19:34:05,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:34:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-10-26 19:34:05,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:34:05,965 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 19:34:05,965 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 19:34:05,965 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 19:34:05,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:34:05,965 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cbe27c74-6353-41e8-ba6d-5c8cfe840e23/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 19:34:05,972 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 19:34:05,973 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-26 19:34:06,003 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-26 19:34:06,004 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 19:34:06,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:34:06,200 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:34:06,200 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 19:34:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:34:06,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 19:34:06,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 27 [2018-10-26 19:34:06,462 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 19:34:06,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-26 19:34:06,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-26 19:34:06,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2018-10-26 19:34:06,463 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 17 states. [2018-10-26 19:34:06,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:34:06,827 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2018-10-26 19:34:06,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-26 19:34:06,827 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 23 [2018-10-26 19:34:06,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:34:06,828 INFO L225 Difference]: With dead ends: 38 [2018-10-26 19:34:06,828 INFO L226 Difference]: Without dead ends: 32 [2018-10-26 19:34:06,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2018-10-26 19:34:06,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-26 19:34:06,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2018-10-26 19:34:06,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-26 19:34:06,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-10-26 19:34:06,832 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 23 [2018-10-26 19:34:06,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:34:06,832 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-10-26 19:34:06,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-26 19:34:06,832 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-10-26 19:34:06,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-26 19:34:06,833 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:34:06,833 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:34:06,837 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:34:06,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:34:06,838 INFO L82 PathProgramCache]: Analyzing trace with hash -418779461, now seen corresponding path program 3 times [2018-10-26 19:34:06,838 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 19:34:06,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:34:06,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 19:34:06,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:34:06,840 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 19:34:06,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 19:34:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 19:34:06,876 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-26 19:34:06,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 07:34:06 BoogieIcfgContainer [2018-10-26 19:34:06,901 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 19:34:06,902 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 19:34:06,902 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 19:34:06,902 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 19:34:06,904 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:34:02" (3/4) ... [2018-10-26 19:34:06,906 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-10-26 19:34:06,951 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_cbe27c74-6353-41e8-ba6d-5c8cfe840e23/bin-2019/utaipan/witness.graphml [2018-10-26 19:34:06,951 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 19:34:06,952 INFO L168 Benchmark]: Toolchain (without parser) took 5381.73 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 157.3 MB). Free memory was 957.0 MB in the beginning and 1.1 GB in the end (delta: -104.8 MB). Peak memory consumption was 52.4 MB. Max. memory is 11.5 GB. [2018-10-26 19:34:06,953 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 982.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 19:34:06,953 INFO L168 Benchmark]: CACSL2BoogieTranslator took 176.15 ms. Allocated memory is still 1.0 GB. Free memory was 957.0 MB in the beginning and 945.2 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-10-26 19:34:06,953 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.79 ms. Allocated memory is still 1.0 GB. Free memory is still 945.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 19:34:06,954 INFO L168 Benchmark]: Boogie Preprocessor took 20.47 ms. Allocated memory is still 1.0 GB. Free memory was 945.2 MB in the beginning and 942.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-26 19:34:06,954 INFO L168 Benchmark]: RCFGBuilder took 437.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 157.3 MB). Free memory was 942.5 MB in the beginning and 1.1 GB in the end (delta: -199.8 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. [2018-10-26 19:34:06,955 INFO L168 Benchmark]: TraceAbstraction took 4675.19 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: 77.0 MB). Peak memory consumption was 77.0 MB. Max. memory is 11.5 GB. [2018-10-26 19:34:06,955 INFO L168 Benchmark]: Witness Printer took 49.34 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: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2018-10-26 19:34:06,961 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 982.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 176.15 ms. Allocated memory is still 1.0 GB. Free memory was 957.0 MB in the beginning and 945.2 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 18.79 ms. Allocated memory is still 1.0 GB. Free memory is still 945.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.47 ms. Allocated memory is still 1.0 GB. Free memory was 945.2 MB in the beginning and 942.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 437.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 157.3 MB). Free memory was 942.5 MB in the beginning and 1.1 GB in the end (delta: -199.8 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4675.19 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: 77.0 MB). Peak memory consumption was 77.0 MB. Max. memory is 11.5 GB. * Witness Printer took 49.34 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: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, n=0, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=1, n=4, n=2] [L15] COND FALSE !(i==4) VAL [i=1, n=4, n=2] [L13] i++ VAL [i=2, n=2, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=2, n=4, n=4] [L15] COND FALSE !(i==4) VAL [i=2, n=4, n=4] [L13] i++ VAL [i=3, n=4, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=3, n=6, n=4] [L15] COND FALSE !(i==4) VAL [i=3, n=6, n=4] [L13] i++ VAL [i=4, n=6, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=4, n=8, n=4] [L15] COND TRUE i==4 [L15] sn=-10 VAL [i=4, n=4, n=-10] [L13] i++ VAL [i=5, n=4, n=-10] [L13] COND FALSE !(i<=n) VAL [i=5, n=4, n=-10] [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 4.6s OverallTime, 8 OverallIterations, 5 TraceHistogramMax, 1.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 92 SDtfs, 21 SDslu, 279 SDs, 0 SdLazy, 286 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 138 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.7s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 223 NumberOfCodeBlocks, 223 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 261 ConstructedInterpolants, 12 QuantifiedInterpolants, 24641 SizeOfPredicates, 10 NumberOfNonLiveVariables, 177 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 15 InterpolantComputations, 3 PerfectInterpolantSequences, 49/140 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...