./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/nested5_true-unreach-call.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_c573494c-a0b1-400a-8f40-9dd31c508893/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_c573494c-a0b1-400a-8f40-9dd31c508893/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_c573494c-a0b1-400a-8f40-9dd31c508893/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_c573494c-a0b1-400a-8f40-9dd31c508893/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested5_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_c573494c-a0b1-400a-8f40-9dd31c508893/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_c573494c-a0b1-400a-8f40-9dd31c508893/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 58c483ef37358c272383ba8c3b69f22948f7d8e5 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 13:18:34,762 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 13:18:34,763 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 13:18:34,769 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 13:18:34,770 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 13:18:34,770 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 13:18:34,771 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 13:18:34,771 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 13:18:34,772 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 13:18:34,773 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 13:18:34,773 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 13:18:34,773 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 13:18:34,774 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 13:18:34,774 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 13:18:34,775 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 13:18:34,775 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 13:18:34,776 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 13:18:34,777 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 13:18:34,777 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 13:18:34,778 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 13:18:34,779 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 13:18:34,779 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 13:18:34,780 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 13:18:34,781 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 13:18:34,781 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 13:18:34,781 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 13:18:34,782 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 13:18:34,782 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 13:18:34,783 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 13:18:34,783 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 13:18:34,783 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 13:18:34,784 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 13:18:34,784 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 13:18:34,784 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 13:18:34,784 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 13:18:34,785 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 13:18:34,785 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_c573494c-a0b1-400a-8f40-9dd31c508893/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-09 13:18:34,792 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 13:18:34,792 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 13:18:34,793 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 13:18:34,793 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 13:18:34,793 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 13:18:34,793 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 13:18:34,793 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 13:18:34,793 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 13:18:34,793 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 13:18:34,794 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 13:18:34,794 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 13:18:34,794 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 13:18:34,794 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 13:18:34,794 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 13:18:34,794 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 13:18:34,795 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 13:18:34,795 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 13:18:34,795 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 13:18:34,795 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 13:18:34,795 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 13:18:34,795 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 13:18:34,795 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 13:18:34,795 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 13:18:34,796 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 13:18:34,796 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 13:18:34,796 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 13:18:34,796 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 13:18:34,796 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 13:18:34,796 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 13:18:34,796 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 13:18:34,797 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 13:18:34,797 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 13:18:34,797 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 13:18:34,797 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 13:18:34,797 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 13:18:34,797 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-09 13:18:34,797 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_c573494c-a0b1-400a-8f40-9dd31c508893/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 -> 58c483ef37358c272383ba8c3b69f22948f7d8e5 [2018-12-09 13:18:34,815 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 13:18:34,824 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 13:18:34,826 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 13:18:34,828 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 13:18:34,828 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 13:18:34,828 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_c573494c-a0b1-400a-8f40-9dd31c508893/bin-2019/utaipan/../../sv-benchmarks/c/loops-crafted-1/nested5_true-unreach-call.c [2018-12-09 13:18:34,866 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c573494c-a0b1-400a-8f40-9dd31c508893/bin-2019/utaipan/data/3818e8a26/9a76a419148b4a4f927c312b39db91a7/FLAGddbed898f [2018-12-09 13:18:35,243 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 13:18:35,243 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_c573494c-a0b1-400a-8f40-9dd31c508893/sv-benchmarks/c/loops-crafted-1/nested5_true-unreach-call.c [2018-12-09 13:18:35,247 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c573494c-a0b1-400a-8f40-9dd31c508893/bin-2019/utaipan/data/3818e8a26/9a76a419148b4a4f927c312b39db91a7/FLAGddbed898f [2018-12-09 13:18:35,256 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_c573494c-a0b1-400a-8f40-9dd31c508893/bin-2019/utaipan/data/3818e8a26/9a76a419148b4a4f927c312b39db91a7 [2018-12-09 13:18:35,259 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 13:18:35,260 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 13:18:35,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 13:18:35,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 13:18:35,263 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 13:18:35,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 01:18:35" (1/1) ... [2018-12-09 13:18:35,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2caf47c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:18:35, skipping insertion in model container [2018-12-09 13:18:35,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 01:18:35" (1/1) ... [2018-12-09 13:18:35,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 13:18:35,283 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 13:18:35,378 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 13:18:35,380 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 13:18:35,390 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 13:18:35,398 INFO L195 MainTranslator]: Completed translation [2018-12-09 13:18:35,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:18:35 WrapperNode [2018-12-09 13:18:35,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 13:18:35,399 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 13:18:35,399 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 13:18:35,399 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 13:18:35,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:18:35" (1/1) ... [2018-12-09 13:18:35,407 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:18:35" (1/1) ... [2018-12-09 13:18:35,410 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 13:18:35,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 13:18:35,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 13:18:35,411 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 13:18:35,416 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:18:35" (1/1) ... [2018-12-09 13:18:35,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:18:35" (1/1) ... [2018-12-09 13:18:35,417 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:18:35" (1/1) ... [2018-12-09 13:18:35,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:18:35" (1/1) ... [2018-12-09 13:18:35,419 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:18:35" (1/1) ... [2018-12-09 13:18:35,422 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:18:35" (1/1) ... [2018-12-09 13:18:35,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:18:35" (1/1) ... [2018-12-09 13:18:35,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 13:18:35,424 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 13:18:35,424 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 13:18:35,424 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 13:18:35,425 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:18:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c573494c-a0b1-400a-8f40-9dd31c508893/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 [2018-12-09 13:18:35,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 13:18:35,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 13:18:35,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 13:18:35,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 13:18:35,488 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 13:18:35,488 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 13:18:35,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-09 13:18:35,488 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-09 13:18:35,590 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 13:18:35,590 INFO L280 CfgBuilder]: Removed 5 assue(true) statements. [2018-12-09 13:18:35,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:18:35 BoogieIcfgContainer [2018-12-09 13:18:35,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 13:18:35,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 13:18:35,591 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 13:18:35,593 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 13:18:35,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 01:18:35" (1/3) ... [2018-12-09 13:18:35,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a98a57d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 01:18:35, skipping insertion in model container [2018-12-09 13:18:35,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:18:35" (2/3) ... [2018-12-09 13:18:35,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a98a57d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 01:18:35, skipping insertion in model container [2018-12-09 13:18:35,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:18:35" (3/3) ... [2018-12-09 13:18:35,595 INFO L112 eAbstractionObserver]: Analyzing ICFG nested5_true-unreach-call.c [2018-12-09 13:18:35,600 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 13:18:35,604 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-09 13:18:35,613 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-09 13:18:35,630 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 13:18:35,630 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 13:18:35,630 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 13:18:35,630 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 13:18:35,631 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 13:18:35,631 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 13:18:35,631 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 13:18:35,631 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 13:18:35,640 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2018-12-09 13:18:35,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-09 13:18:35,643 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:18:35,644 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 13:18:35,645 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 13:18:35,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:18:35,649 INFO L82 PathProgramCache]: Analyzing trace with hash -84144223, now seen corresponding path program 1 times [2018-12-09 13:18:35,650 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:18:35,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:18:35,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:18:35,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:18:35,677 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:18:35,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:18:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:18:35,719 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 13:18:35,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 13:18:35,719 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 13:18:35,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-09 13:18:35,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-09 13:18:35,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-09 13:18:35,731 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2018-12-09 13:18:35,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:18:35,743 INFO L93 Difference]: Finished difference Result 47 states and 68 transitions. [2018-12-09 13:18:35,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-09 13:18:35,744 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2018-12-09 13:18:35,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:18:35,748 INFO L225 Difference]: With dead ends: 47 [2018-12-09 13:18:35,748 INFO L226 Difference]: Without dead ends: 22 [2018-12-09 13:18:35,750 INFO L631 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 [2018-12-09 13:18:35,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-09 13:18:35,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-12-09 13:18:35,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-12-09 13:18:35,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2018-12-09 13:18:35,770 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2018-12-09 13:18:35,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:18:35,770 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2018-12-09 13:18:35,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-09 13:18:35,771 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2018-12-09 13:18:35,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-09 13:18:35,771 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:18:35,771 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 13:18:35,771 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 13:18:35,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:18:35,771 INFO L82 PathProgramCache]: Analyzing trace with hash -89685349, now seen corresponding path program 1 times [2018-12-09 13:18:35,772 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:18:35,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:18:35,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:18:35,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:18:35,772 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:18:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:18:35,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:18:35,824 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 13:18:35,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 13:18:35,824 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 13:18:35,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 13:18:35,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 13:18:35,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 13:18:35,826 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2018-12-09 13:18:35,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:18:35,839 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2018-12-09 13:18:35,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 13:18:35,839 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2018-12-09 13:18:35,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:18:35,840 INFO L225 Difference]: With dead ends: 48 [2018-12-09 13:18:35,840 INFO L226 Difference]: Without dead ends: 31 [2018-12-09 13:18:35,840 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 13:18:35,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-12-09 13:18:35,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2018-12-09 13:18:35,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-09 13:18:35,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-12-09 13:18:35,844 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2018-12-09 13:18:35,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:18:35,844 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-12-09 13:18:35,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 13:18:35,844 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-12-09 13:18:35,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-09 13:18:35,844 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:18:35,844 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 13:18:35,845 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 13:18:35,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:18:35,845 INFO L82 PathProgramCache]: Analyzing trace with hash 374245081, now seen corresponding path program 1 times [2018-12-09 13:18:35,845 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:18:35,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:18:35,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:18:35,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:18:35,846 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:18:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:18:35,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:18:35,891 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:18:35,891 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:18:35,892 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-12-09 13:18:35,893 INFO L205 CegarAbsIntRunner]: [0], [4], [12], [20], [28], [36], [42], [44], [46], [69], [72], [74], [80], [81], [82], [84] [2018-12-09 13:18:35,914 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 13:18:35,914 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 13:18:36,024 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 13:18:36,025 INFO L272 AbstractInterpreter]: Visited 16 different actions 32 times. Merged at 3 different actions 9 times. Widened at 1 different actions 1 times. Performed 84 root evaluator evaluations with a maximum evaluation depth of 12. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 12. Found 2 fixpoints after 2 different actions. Largest state had 6 variables. [2018-12-09 13:18:36,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:18:36,038 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 13:18:36,038 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:18:36,038 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c573494c-a0b1-400a-8f40-9dd31c508893/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 [2018-12-09 13:18:36,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:18:36,044 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:18:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:18:36,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:18:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:18:36,076 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:18:36,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:18:36,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:18:36,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2018-12-09 13:18:36,111 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:18:36,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 13:18:36,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 13:18:36,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-09 13:18:36,112 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2018-12-09 13:18:36,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:18:36,132 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2018-12-09 13:18:36,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 13:18:36,132 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-12-09 13:18:36,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:18:36,133 INFO L225 Difference]: With dead ends: 51 [2018-12-09 13:18:36,133 INFO L226 Difference]: Without dead ends: 33 [2018-12-09 13:18:36,134 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-09 13:18:36,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-09 13:18:36,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2018-12-09 13:18:36,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-09 13:18:36,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2018-12-09 13:18:36,138 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 16 [2018-12-09 13:18:36,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:18:36,138 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2018-12-09 13:18:36,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 13:18:36,138 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2018-12-09 13:18:36,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-09 13:18:36,139 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:18:36,139 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 13:18:36,139 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 13:18:36,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:18:36,139 INFO L82 PathProgramCache]: Analyzing trace with hash -465210473, now seen corresponding path program 2 times [2018-12-09 13:18:36,139 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:18:36,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:18:36,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:18:36,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:18:36,140 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:18:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:18:36,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:18:36,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:18:36,187 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:18:36,187 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:18:36,187 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:18:36,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:18:36,187 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c573494c-a0b1-400a-8f40-9dd31c508893/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 [2018-12-09 13:18:36,193 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:18:36,193 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:18:36,202 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-09 13:18:36,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:18:36,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:18:36,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:18:36,220 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:18:36,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:18:36,262 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:18:36,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2018-12-09 13:18:36,262 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:18:36,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 13:18:36,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 13:18:36,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-12-09 13:18:36,263 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2018-12-09 13:18:36,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:18:36,284 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2018-12-09 13:18:36,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 13:18:36,285 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-12-09 13:18:36,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:18:36,285 INFO L225 Difference]: With dead ends: 55 [2018-12-09 13:18:36,285 INFO L226 Difference]: Without dead ends: 35 [2018-12-09 13:18:36,286 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-12-09 13:18:36,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-12-09 13:18:36,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2018-12-09 13:18:36,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-09 13:18:36,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2018-12-09 13:18:36,288 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2018-12-09 13:18:36,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:18:36,288 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2018-12-09 13:18:36,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 13:18:36,288 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2018-12-09 13:18:36,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-09 13:18:36,289 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:18:36,289 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 13:18:36,289 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 13:18:36,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:18:36,289 INFO L82 PathProgramCache]: Analyzing trace with hash 271853781, now seen corresponding path program 3 times [2018-12-09 13:18:36,289 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:18:36,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:18:36,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:18:36,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:18:36,290 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:18:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:18:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:18:36,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:18:36,345 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:18:36,345 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:18:36,345 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:18:36,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:18:36,345 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c573494c-a0b1-400a-8f40-9dd31c508893/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 [2018-12-09 13:18:36,351 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:18:36,351 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:18:36,359 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:18:36,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:18:36,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:18:36,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:18:36,372 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:18:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:18:36,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:18:36,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2018-12-09 13:18:36,440 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:18:36,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 13:18:36,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 13:18:36,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-09 13:18:36,441 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2018-12-09 13:18:36,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:18:36,479 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2018-12-09 13:18:36,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 13:18:36,480 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2018-12-09 13:18:36,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:18:36,480 INFO L225 Difference]: With dead ends: 59 [2018-12-09 13:18:36,480 INFO L226 Difference]: Without dead ends: 37 [2018-12-09 13:18:36,481 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-09 13:18:36,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-12-09 13:18:36,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2018-12-09 13:18:36,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-09 13:18:36,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2018-12-09 13:18:36,485 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2018-12-09 13:18:36,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:18:36,486 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2018-12-09 13:18:36,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 13:18:36,486 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2018-12-09 13:18:36,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-09 13:18:36,486 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:18:36,486 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 13:18:36,487 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 13:18:36,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:18:36,487 INFO L82 PathProgramCache]: Analyzing trace with hash -79001965, now seen corresponding path program 4 times [2018-12-09 13:18:36,487 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:18:36,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:18:36,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:18:36,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:18:36,488 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:18:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:18:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:18:36,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:18:36,544 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:18:36,545 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:18:36,545 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:18:36,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:18:36,545 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c573494c-a0b1-400a-8f40-9dd31c508893/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 [2018-12-09 13:18:36,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:18:36,552 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:18:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:18:36,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:18:36,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:18:36,573 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:18:36,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:18:36,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:18:36,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2018-12-09 13:18:36,650 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:18:36,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 13:18:36,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 13:18:36,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2018-12-09 13:18:36,651 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2018-12-09 13:18:36,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:18:36,693 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2018-12-09 13:18:36,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 13:18:36,693 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-12-09 13:18:36,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:18:36,693 INFO L225 Difference]: With dead ends: 63 [2018-12-09 13:18:36,694 INFO L226 Difference]: Without dead ends: 39 [2018-12-09 13:18:36,694 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2018-12-09 13:18:36,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-09 13:18:36,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2018-12-09 13:18:36,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-09 13:18:36,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2018-12-09 13:18:36,697 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2018-12-09 13:18:36,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:18:36,697 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2018-12-09 13:18:36,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 13:18:36,697 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2018-12-09 13:18:36,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-12-09 13:18:36,697 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:18:36,697 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 13:18:36,697 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 13:18:36,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:18:36,698 INFO L82 PathProgramCache]: Analyzing trace with hash 2051042513, now seen corresponding path program 5 times [2018-12-09 13:18:36,698 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:18:36,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:18:36,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:18:36,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:18:36,699 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:18:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:18:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:18:36,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:18:36,765 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:18:36,765 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:18:36,765 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:18:36,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:18:36,765 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c573494c-a0b1-400a-8f40-9dd31c508893/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:18:36,771 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:18:36,771 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:18:36,789 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-09 13:18:36,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:18:36,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:18:41,106 WARN L180 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 90 DAG size of output: 19 [2018-12-09 13:18:41,226 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-09 13:18:41,227 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:18:41,554 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-09 13:18:41,568 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-09 13:18:41,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [8] total 18 [2018-12-09 13:18:41,568 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 13:18:41,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 13:18:41,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 13:18:41,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=231, Unknown=1, NotChecked=0, Total=306 [2018-12-09 13:18:41,569 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 7 states. [2018-12-09 13:18:44,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:18:44,276 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2018-12-09 13:18:44,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 13:18:44,276 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2018-12-09 13:18:44,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:18:44,277 INFO L225 Difference]: With dead ends: 38 [2018-12-09 13:18:44,277 INFO L226 Difference]: Without dead ends: 0 [2018-12-09 13:18:44,277 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=90, Invalid=289, Unknown=1, NotChecked=0, Total=380 [2018-12-09 13:18:44,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-09 13:18:44,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-09 13:18:44,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-09 13:18:44,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-09 13:18:44,278 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2018-12-09 13:18:44,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:18:44,278 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 13:18:44,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 13:18:44,278 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-09 13:18:44,278 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-09 13:18:44,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-09 13:18:44,368 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-09 13:18:44,369 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-09 13:18:44,369 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-09 13:18:44,369 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-09 13:18:44,369 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-09 13:18:44,369 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-09 13:18:44,369 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 10 23) no Hoare annotation was computed. [2018-12-09 13:18:44,369 INFO L444 ceAbstractionStarter]: At program point L19-2(lines 19 22) the Hoare annotation is: (or (< (mod main_~v~0 4294967296) 10) (< (mod (+ main_~v~0 4294967295) 4294967296) 10)) [2018-12-09 13:18:44,369 INFO L448 ceAbstractionStarter]: For program point L20-2(line 20) no Hoare annotation was computed. [2018-12-09 13:18:44,369 INFO L444 ceAbstractionStarter]: At program point L20-3(line 20) the Hoare annotation is: (or (and (<= main_~v~0 0) (< 0 (+ (div main_~v~0 4294967296) 1))) (< (mod (+ main_~v~0 4294967295) 4294967296) 10)) [2018-12-09 13:18:44,370 INFO L444 ceAbstractionStarter]: At program point L20-4(line 20) the Hoare annotation is: (and (<= 10 (mod main_~v~0 4294967296)) (< (mod (+ main_~v~0 4294967295) 4294967296) 10)) [2018-12-09 13:18:44,370 INFO L448 ceAbstractionStarter]: For program point L16-2(lines 16 22) no Hoare annotation was computed. [2018-12-09 13:18:44,370 INFO L444 ceAbstractionStarter]: At program point L16-3(lines 16 22) the Hoare annotation is: (or (< (mod main_~v~0 4294967296) 10) (< (mod (+ main_~v~0 4294967295) 4294967296) 10)) [2018-12-09 13:18:44,370 INFO L448 ceAbstractionStarter]: For program point L16-4(lines 10 23) no Hoare annotation was computed. [2018-12-09 13:18:44,370 INFO L448 ceAbstractionStarter]: For program point L21(lines 19 22) no Hoare annotation was computed. [2018-12-09 13:18:44,370 INFO L448 ceAbstractionStarter]: For program point L17-2(lines 17 22) no Hoare annotation was computed. [2018-12-09 13:18:44,370 INFO L444 ceAbstractionStarter]: At program point L17-3(lines 17 22) the Hoare annotation is: (or (< (mod main_~v~0 4294967296) 10) (< (mod (+ main_~v~0 4294967295) 4294967296) 10)) [2018-12-09 13:18:44,370 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 10 23) the Hoare annotation is: true [2018-12-09 13:18:44,370 INFO L448 ceAbstractionStarter]: For program point L18-2(lines 18 22) no Hoare annotation was computed. [2018-12-09 13:18:44,370 INFO L444 ceAbstractionStarter]: At program point L18-3(lines 18 22) the Hoare annotation is: (or (< (mod main_~v~0 4294967296) 10) (< (mod (+ main_~v~0 4294967295) 4294967296) 10)) [2018-12-09 13:18:44,370 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-12-09 13:18:44,371 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-12-09 13:18:44,371 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-12-09 13:18:44,371 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-12-09 13:18:44,371 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-12-09 13:18:44,371 INFO L448 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-12-09 13:18:44,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 01:18:44 BoogieIcfgContainer [2018-12-09 13:18:44,379 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 13:18:44,380 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 13:18:44,380 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 13:18:44,380 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 13:18:44,380 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:18:35" (3/4) ... [2018-12-09 13:18:44,382 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-09 13:18:44,385 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-09 13:18:44,386 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-09 13:18:44,386 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-12-09 13:18:44,388 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2018-12-09 13:18:44,388 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-09 13:18:44,388 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-09 13:18:44,412 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_c573494c-a0b1-400a-8f40-9dd31c508893/bin-2019/utaipan/witness.graphml [2018-12-09 13:18:44,412 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 13:18:44,413 INFO L168 Benchmark]: Toolchain (without parser) took 9153.63 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.1 MB). Free memory was 953.4 MB in the beginning and 1.1 GB in the end (delta: -122.8 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 13:18:44,413 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 13:18:44,414 INFO L168 Benchmark]: CACSL2BoogieTranslator took 138.04 ms. Allocated memory is still 1.0 GB. Free memory was 953.4 MB in the beginning and 941.6 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-12-09 13:18:44,414 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.63 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 13:18:44,414 INFO L168 Benchmark]: Boogie Preprocessor took 13.20 ms. Allocated memory is still 1.0 GB. Free memory was 941.6 MB in the beginning and 936.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-09 13:18:44,414 INFO L168 Benchmark]: RCFGBuilder took 166.56 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.1 MB). Free memory was 936.3 MB in the beginning and 1.1 GB in the end (delta: -150.2 MB). Peak memory consumption was 13.0 MB. Max. memory is 11.5 GB. [2018-12-09 13:18:44,415 INFO L168 Benchmark]: TraceAbstraction took 8788.31 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -103.4 kB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 13:18:44,415 INFO L168 Benchmark]: Witness Printer took 32.88 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 11.5 GB. [2018-12-09 13:18:44,416 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 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 138.04 ms. Allocated memory is still 1.0 GB. Free memory was 953.4 MB in the beginning and 941.6 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 11.63 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.20 ms. Allocated memory is still 1.0 GB. Free memory was 941.6 MB in the beginning and 936.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 166.56 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.1 MB). Free memory was 936.3 MB in the beginning and 1.1 GB in the end (delta: -150.2 MB). Peak memory consumption was 13.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 8788.31 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -103.4 kB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 32.88 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (v <= 0 && 0 < v / 4294967296 + 1) || (v + 4294967295) % 4294967296 < 10 - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: v % 4294967296 < 10 || (v + 4294967295) % 4294967296 < 10 - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: v % 4294967296 < 10 || (v + 4294967295) % 4294967296 < 10 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: v % 4294967296 < 10 || (v + 4294967295) % 4294967296 < 10 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: v % 4294967296 < 10 || (v + 4294967295) % 4294967296 < 10 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. SAFE Result, 8.7s OverallTime, 7 OverallIterations, 5 TraceHistogramMax, 2.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 178 SDtfs, 98 SDslu, 459 SDs, 0 SdLazy, 193 SolverSat, 23 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 238 GetRequests, 177 SyntacticMatches, 10 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 5.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 40 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 17 PreInvPairs, 32 NumberOfFragments, 89 HoareAnnotationTreeSize, 17 FomulaSimplifications, 56 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 32 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 228 NumberOfCodeBlocks, 222 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 311 ConstructedInterpolants, 2 QuantifiedInterpolants, 18538 SizeOfPredicates, 7 NumberOfNonLiveVariables, 246 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 17 InterpolantComputations, 4 PerfectInterpolantSequences, 50/165 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...