./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/afnp2014_true-unreach-call_true-termination.c.i --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_db03dd0f-ef51-42f8-bd57-d2130d1a1ad1/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_db03dd0f-ef51-42f8-bd57-d2130d1a1ad1/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_db03dd0f-ef51-42f8-bd57-d2130d1a1ad1/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_db03dd0f-ef51-42f8-bd57-d2130d1a1ad1/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-lit/afnp2014_true-unreach-call_true-termination.c.i -s /tmp/vcloud-vcloud-master/worker/working_dir_db03dd0f-ef51-42f8-bd57-d2130d1a1ad1/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_db03dd0f-ef51-42f8-bd57-d2130d1a1ad1/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 d51c6cc706e0ce829ba547908cd819c55d1b3081 ............................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 01:01:30,124 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 01:01:30,125 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 01:01:30,131 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 01:01:30,131 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 01:01:30,131 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 01:01:30,132 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 01:01:30,133 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 01:01:30,134 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 01:01:30,134 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 01:01:30,135 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 01:01:30,135 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 01:01:30,136 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 01:01:30,136 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 01:01:30,137 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 01:01:30,137 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 01:01:30,138 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 01:01:30,139 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 01:01:30,140 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 01:01:30,140 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 01:01:30,141 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 01:01:30,142 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 01:01:30,143 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 01:01:30,143 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 01:01:30,143 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 01:01:30,143 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 01:01:30,144 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 01:01:30,144 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 01:01:30,145 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 01:01:30,145 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 01:01:30,145 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 01:01:30,146 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 01:01:30,146 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 01:01:30,146 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 01:01:30,147 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 01:01:30,147 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 01:01:30,147 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_db03dd0f-ef51-42f8-bd57-d2130d1a1ad1/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-09 01:01:30,155 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 01:01:30,155 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 01:01:30,156 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 01:01:30,156 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 01:01:30,156 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 01:01:30,156 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 01:01:30,156 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 01:01:30,156 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 01:01:30,156 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 01:01:30,156 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 01:01:30,157 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 01:01:30,157 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 01:01:30,157 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 01:01:30,157 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 01:01:30,157 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 01:01:30,157 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 01:01:30,157 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 01:01:30,157 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 01:01:30,158 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 01:01:30,158 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 01:01:30,158 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 01:01:30,158 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 01:01:30,158 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 01:01:30,158 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 01:01:30,158 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 01:01:30,158 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 01:01:30,158 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 01:01:30,158 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 01:01:30,158 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 01:01:30,159 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 01:01:30,159 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 01:01:30,159 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 01:01:30,159 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 01:01:30,159 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 01:01:30,159 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 01:01:30,159 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-09 01:01:30,159 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_db03dd0f-ef51-42f8-bd57-d2130d1a1ad1/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 -> d51c6cc706e0ce829ba547908cd819c55d1b3081 [2018-12-09 01:01:30,177 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 01:01:30,187 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 01:01:30,189 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 01:01:30,191 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 01:01:30,191 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 01:01:30,191 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_db03dd0f-ef51-42f8-bd57-d2130d1a1ad1/bin-2019/utaipan/../../sv-benchmarks/c/loop-lit/afnp2014_true-unreach-call_true-termination.c.i [2018-12-09 01:01:30,231 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_db03dd0f-ef51-42f8-bd57-d2130d1a1ad1/bin-2019/utaipan/data/8b24a8918/c766621410574bac81bc38ea5bc1077a/FLAGd2c204a25 [2018-12-09 01:01:30,682 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 01:01:30,683 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_db03dd0f-ef51-42f8-bd57-d2130d1a1ad1/sv-benchmarks/c/loop-lit/afnp2014_true-unreach-call_true-termination.c.i [2018-12-09 01:01:30,686 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_db03dd0f-ef51-42f8-bd57-d2130d1a1ad1/bin-2019/utaipan/data/8b24a8918/c766621410574bac81bc38ea5bc1077a/FLAGd2c204a25 [2018-12-09 01:01:30,694 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_db03dd0f-ef51-42f8-bd57-d2130d1a1ad1/bin-2019/utaipan/data/8b24a8918/c766621410574bac81bc38ea5bc1077a [2018-12-09 01:01:30,695 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 01:01:30,696 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 01:01:30,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 01:01:30,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 01:01:30,699 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 01:01:30,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 01:01:30" (1/1) ... [2018-12-09 01:01:30,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4888228d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:01:30, skipping insertion in model container [2018-12-09 01:01:30,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 01:01:30" (1/1) ... [2018-12-09 01:01:30,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 01:01:30,715 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 01:01:30,796 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 01:01:30,798 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 01:01:30,806 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 01:01:30,814 INFO L195 MainTranslator]: Completed translation [2018-12-09 01:01:30,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:01:30 WrapperNode [2018-12-09 01:01:30,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 01:01:30,815 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 01:01:30,815 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 01:01:30,815 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 01:01:30,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:01:30" (1/1) ... [2018-12-09 01:01:30,822 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:01:30" (1/1) ... [2018-12-09 01:01:30,826 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 01:01:30,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 01:01:30,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 01:01:30,826 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 01:01:30,832 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:01:30" (1/1) ... [2018-12-09 01:01:30,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:01:30" (1/1) ... [2018-12-09 01:01:30,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:01:30" (1/1) ... [2018-12-09 01:01:30,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:01:30" (1/1) ... [2018-12-09 01:01:30,834 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:01:30" (1/1) ... [2018-12-09 01:01:30,837 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:01:30" (1/1) ... [2018-12-09 01:01:30,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:01:30" (1/1) ... [2018-12-09 01:01:30,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 01:01:30,838 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 01:01:30,838 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 01:01:30,838 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 01:01:30,839 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:01:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_db03dd0f-ef51-42f8-bd57-d2130d1a1ad1/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 01:01:30,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 01:01:30,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 01:01:30,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 01:01:30,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 01:01:30,900 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 01:01:30,900 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 01:01:30,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-09 01:01:30,900 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-09 01:01:30,984 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 01:01:30,985 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-09 01:01:30,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:01:30 BoogieIcfgContainer [2018-12-09 01:01:30,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 01:01:30,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 01:01:30,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 01:01:30,988 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 01:01:30,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 01:01:30" (1/3) ... [2018-12-09 01:01:30,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a44cbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 01:01:30, skipping insertion in model container [2018-12-09 01:01:30,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:01:30" (2/3) ... [2018-12-09 01:01:30,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a44cbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 01:01:30, skipping insertion in model container [2018-12-09 01:01:30,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:01:30" (3/3) ... [2018-12-09 01:01:30,990 INFO L112 eAbstractionObserver]: Analyzing ICFG afnp2014_true-unreach-call_true-termination.c.i [2018-12-09 01:01:30,996 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 01:01:31,000 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-09 01:01:31,009 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-09 01:01:31,028 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 01:01:31,028 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 01:01:31,028 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 01:01:31,028 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 01:01:31,028 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 01:01:31,028 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 01:01:31,029 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 01:01:31,029 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 01:01:31,039 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-12-09 01:01:31,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-09 01:01:31,042 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 01:01:31,043 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 01:01:31,044 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 01:01:31,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 01:01:31,047 INFO L82 PathProgramCache]: Analyzing trace with hash -147882559, now seen corresponding path program 1 times [2018-12-09 01:01:31,049 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 01:01:31,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:01:31,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 01:01:31,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:01:31,077 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 01:01:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 01:01:31,109 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 01:01:31,110 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 01:01:31,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 01:01:31,110 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 01:01:31,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-09 01:01:31,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-09 01:01:31,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-09 01:01:31,122 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-12-09 01:01:31,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 01:01:31,134 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2018-12-09 01:01:31,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-09 01:01:31,135 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-12-09 01:01:31,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 01:01:31,139 INFO L225 Difference]: With dead ends: 32 [2018-12-09 01:01:31,139 INFO L226 Difference]: Without dead ends: 13 [2018-12-09 01:01:31,141 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 01:01:31,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-12-09 01:01:31,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-12-09 01:01:31,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-12-09 01:01:31,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-12-09 01:01:31,161 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-12-09 01:01:31,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 01:01:31,161 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-12-09 01:01:31,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-09 01:01:31,162 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-12-09 01:01:31,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-09 01:01:31,162 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 01:01:31,162 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 01:01:31,162 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 01:01:31,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 01:01:31,163 INFO L82 PathProgramCache]: Analyzing trace with hash 99303034, now seen corresponding path program 1 times [2018-12-09 01:01:31,163 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 01:01:31,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:01:31,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 01:01:31,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:01:31,164 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 01:01:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 01:01:31,220 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 01:01:31,220 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 01:01:31,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 01:01:31,220 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 01:01:31,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 01:01:31,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 01:01:31,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 01:01:31,221 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2018-12-09 01:01:31,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 01:01:31,245 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-12-09 01:01:31,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 01:01:31,246 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2018-12-09 01:01:31,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 01:01:31,246 INFO L225 Difference]: With dead ends: 21 [2018-12-09 01:01:31,246 INFO L226 Difference]: Without dead ends: 16 [2018-12-09 01:01:31,247 INFO L631 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 [2018-12-09 01:01:31,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-12-09 01:01:31,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-12-09 01:01:31,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-09 01:01:31,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-12-09 01:01:31,251 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2018-12-09 01:01:31,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 01:01:31,251 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-12-09 01:01:31,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 01:01:31,251 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-12-09 01:01:31,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-12-09 01:01:31,251 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 01:01:31,251 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 01:01:31,252 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 01:01:31,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 01:01:31,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1368172775, now seen corresponding path program 1 times [2018-12-09 01:01:31,252 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 01:01:31,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:01:31,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 01:01:31,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:01:31,253 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 01:01:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 01:01:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 01:01:31,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 01:01:31,290 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 01:01:31,290 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-12-09 01:01:31,291 INFO L205 CegarAbsIntRunner]: [0], [4], [9], [12], [18], [20], [27], [30], [32], [38], [39], [40], [42] [2018-12-09 01:01:31,311 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 01:01:31,312 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 01:01:31,424 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 01:01:31,425 INFO L272 AbstractInterpreter]: Visited 13 different actions 37 times. Merged at 4 different actions 12 times. Never widened. Performed 256 root evaluator evaluations with a maximum evaluation depth of 4. Performed 256 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-12-09 01:01:31,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 01:01:31,432 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 01:01:31,432 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 01:01:31,432 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_db03dd0f-ef51-42f8-bd57-d2130d1a1ad1/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 01:01:31,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 01:01:31,438 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 01:01:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 01:01:31,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 01:01:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 01:01:31,478 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 01:01:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 01:01:31,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 01:01:31,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2018-12-09 01:01:31,513 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 01:01:31,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 01:01:31,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 01:01:31,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-12-09 01:01:31,514 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2018-12-09 01:01:31,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 01:01:31,553 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2018-12-09 01:01:31,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 01:01:31,554 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2018-12-09 01:01:31,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 01:01:31,554 INFO L225 Difference]: With dead ends: 24 [2018-12-09 01:01:31,554 INFO L226 Difference]: Without dead ends: 19 [2018-12-09 01:01:31,555 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-12-09 01:01:31,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-12-09 01:01:31,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-12-09 01:01:31,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-12-09 01:01:31,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2018-12-09 01:01:31,557 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 15 [2018-12-09 01:01:31,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 01:01:31,557 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2018-12-09 01:01:31,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 01:01:31,557 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2018-12-09 01:01:31,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-09 01:01:31,558 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 01:01:31,558 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 01:01:31,558 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 01:01:31,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 01:01:31,558 INFO L82 PathProgramCache]: Analyzing trace with hash -467892710, now seen corresponding path program 2 times [2018-12-09 01:01:31,558 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 01:01:31,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:01:31,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 01:01:31,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:01:31,559 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 01:01:31,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 01:01:31,606 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 01:01:31,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 01:01:31,606 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 01:01:31,606 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 01:01:31,607 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 01:01:31,607 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 01:01:31,607 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_db03dd0f-ef51-42f8-bd57-d2130d1a1ad1/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 01:01:31,613 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 01:01:31,614 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 01:01:31,624 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-09 01:01:31,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 01:01:31,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 01:01:31,647 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 01:01:31,647 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 01:01:31,668 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 01:01:31,682 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 01:01:31,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2018-12-09 01:01:31,682 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 01:01:31,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 01:01:31,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 01:01:31,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-12-09 01:01:31,683 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 8 states. [2018-12-09 01:01:31,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 01:01:31,702 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2018-12-09 01:01:31,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 01:01:31,702 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2018-12-09 01:01:31,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 01:01:31,702 INFO L225 Difference]: With dead ends: 19 [2018-12-09 01:01:31,702 INFO L226 Difference]: Without dead ends: 0 [2018-12-09 01:01:31,703 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-12-09 01:01:31,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-09 01:01:31,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-09 01:01:31,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-09 01:01:31,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-09 01:01:31,703 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2018-12-09 01:01:31,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 01:01:31,704 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 01:01:31,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 01:01:31,704 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-09 01:01:31,704 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-09 01:01:31,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-09 01:01:31,737 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-09 01:01:31,738 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-09 01:01:31,738 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-09 01:01:31,738 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-09 01:01:31,738 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-09 01:01:31,738 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-09 01:01:31,738 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 10 19) the Hoare annotation is: true [2018-12-09 01:01:31,738 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 10 19) no Hoare annotation was computed. [2018-12-09 01:01:31,738 INFO L448 ceAbstractionStarter]: For program point L17(line 17) no Hoare annotation was computed. [2018-12-09 01:01:31,738 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 10 19) no Hoare annotation was computed. [2018-12-09 01:01:31,738 INFO L448 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-12-09 01:01:31,738 INFO L448 ceAbstractionStarter]: For program point L13-3(lines 13 16) no Hoare annotation was computed. [2018-12-09 01:01:31,738 INFO L444 ceAbstractionStarter]: At program point L13-5(lines 13 16) the Hoare annotation is: (and (<= main_~y~0 main_~x~0) (<= 0 main_~y~0) (<= 1 main_~x~0)) [2018-12-09 01:01:31,738 INFO L444 ceAbstractionStarter]: At program point L13-6(lines 13 16) the Hoare annotation is: (<= main_~y~0 main_~x~0) [2018-12-09 01:01:31,739 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-12-09 01:01:31,739 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-12-09 01:01:31,739 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-12-09 01:01:31,739 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-12-09 01:01:31,739 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-12-09 01:01:31,739 INFO L448 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-12-09 01:01:31,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 01:01:31 BoogieIcfgContainer [2018-12-09 01:01:31,747 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 01:01:31,747 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 01:01:31,747 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 01:01:31,747 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 01:01:31,748 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:01:30" (3/4) ... [2018-12-09 01:01:31,750 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-09 01:01:31,753 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-09 01:01:31,753 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-09 01:01:31,753 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-12-09 01:01:31,756 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-09 01:01:31,756 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-09 01:01:31,756 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-09 01:01:31,782 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_db03dd0f-ef51-42f8-bd57-d2130d1a1ad1/bin-2019/utaipan/witness.graphml [2018-12-09 01:01:31,782 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 01:01:31,783 INFO L168 Benchmark]: Toolchain (without parser) took 1087.14 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 71.3 MB). Free memory was 962.4 MB in the beginning and 940.4 MB in the end (delta: 22.0 MB). Peak memory consumption was 93.3 MB. Max. memory is 11.5 GB. [2018-12-09 01:01:31,784 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 01:01:31,784 INFO L168 Benchmark]: CACSL2BoogieTranslator took 117.69 ms. Allocated memory is still 1.0 GB. Free memory was 962.4 MB in the beginning and 951.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 01:01:31,785 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.30 ms. Allocated memory is still 1.0 GB. Free memory is still 951.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 01:01:31,785 INFO L168 Benchmark]: Boogie Preprocessor took 11.67 ms. Allocated memory is still 1.0 GB. Free memory is still 951.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 01:01:31,785 INFO L168 Benchmark]: RCFGBuilder took 146.98 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 71.3 MB). Free memory was 951.7 MB in the beginning and 1.0 GB in the end (delta: -98.3 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2018-12-09 01:01:31,786 INFO L168 Benchmark]: TraceAbstraction took 761.21 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 940.4 MB in the end (delta: 109.5 MB). Peak memory consumption was 109.5 MB. Max. memory is 11.5 GB. [2018-12-09 01:01:31,786 INFO L168 Benchmark]: Witness Printer took 35.54 ms. Allocated memory is still 1.1 GB. Free memory is still 940.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 01:01:31,788 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 117.69 ms. Allocated memory is still 1.0 GB. Free memory was 962.4 MB in the beginning and 951.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.30 ms. Allocated memory is still 1.0 GB. Free memory is still 951.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.67 ms. Allocated memory is still 1.0 GB. Free memory is still 951.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 146.98 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 71.3 MB). Free memory was 951.7 MB in the beginning and 1.0 GB in the end (delta: -98.3 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 761.21 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 940.4 MB in the end (delta: 109.5 MB). Peak memory consumption was 109.5 MB. Max. memory is 11.5 GB. * Witness Printer took 35.54 ms. Allocated memory is still 1.1 GB. Free memory is still 940.4 MB. There was no memory consumed. 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: 13]: Loop Invariant Derived loop invariant: (y <= x && 0 <= y) && 1 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 0.7s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 52 SDtfs, 14 SDslu, 102 SDs, 0 SdLazy, 41 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 89 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 10 PreInvPairs, 14 NumberOfFragments, 18 HoareAnnotationTreeSize, 10 FomulaSimplifications, 26 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 6 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 88 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 113 ConstructedInterpolants, 0 QuantifiedInterpolants, 4327 SizeOfPredicates, 6 NumberOfNonLiveVariables, 88 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 0/36 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...