./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/SpamAssassin-loop_true-unreach-call_false-termination.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_8152e5f7-c187-49bb-b6bf-c761857be6bf/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_8152e5f7-c187-49bb-b6bf-c761857be6bf/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_8152e5f7-c187-49bb-b6bf-c761857be6bf/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_8152e5f7-c187-49bb-b6bf-c761857be6bf/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/SpamAssassin-loop_true-unreach-call_false-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_8152e5f7-c187-49bb-b6bf-c761857be6bf/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_8152e5f7-c187-49bb-b6bf-c761857be6bf/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 751def0588f132c393a8666a5acb62e8205c40a1 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-03 07:38:57,078 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 07:38:57,079 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 07:38:57,085 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 07:38:57,085 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 07:38:57,086 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 07:38:57,086 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 07:38:57,087 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 07:38:57,088 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 07:38:57,089 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 07:38:57,089 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-03 07:38:57,089 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-03 07:38:57,090 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-03 07:38:57,090 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-03 07:38:57,091 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-03 07:38:57,091 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-03 07:38:57,091 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-03 07:38:57,092 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-03 07:38:57,093 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-03 07:38:57,094 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-03 07:38:57,095 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-03 07:38:57,095 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-03 07:38:57,096 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-03 07:38:57,096 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-03 07:38:57,097 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-03 07:38:57,097 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-03 07:38:57,098 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-03 07:38:57,098 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-03 07:38:57,098 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-03 07:38:57,099 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-03 07:38:57,099 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-03 07:38:57,099 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-03 07:38:57,100 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-03 07:38:57,100 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-03 07:38:57,100 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-03 07:38:57,100 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-03 07:38:57,101 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_8152e5f7-c187-49bb-b6bf-c761857be6bf/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-03 07:38:57,108 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 07:38:57,108 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 07:38:57,108 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 07:38:57,108 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 07:38:57,108 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 07:38:57,109 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 07:38:57,109 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 07:38:57,109 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 07:38:57,109 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 07:38:57,109 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-03 07:38:57,109 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 07:38:57,109 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-03 07:38:57,109 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 07:38:57,109 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 07:38:57,110 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 07:38:57,110 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 07:38:57,110 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 07:38:57,110 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 07:38:57,110 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 07:38:57,110 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 07:38:57,110 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 07:38:57,110 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 07:38:57,110 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 07:38:57,110 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 07:38:57,110 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 07:38:57,111 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 07:38:57,111 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-03 07:38:57,111 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 07:38:57,111 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 07:38:57,111 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 07:38:57,111 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 07:38:57,111 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 07:38:57,111 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 07:38:57,111 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 07:38:57,111 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 07:38:57,111 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 07:38:57,111 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_8152e5f7-c187-49bb-b6bf-c761857be6bf/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 -> 751def0588f132c393a8666a5acb62e8205c40a1 [2018-12-03 07:38:57,128 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 07:38:57,135 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 07:38:57,137 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 07:38:57,138 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-03 07:38:57,138 INFO L276 PluginConnector]: CDTParser initialized [2018-12-03 07:38:57,138 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_8152e5f7-c187-49bb-b6bf-c761857be6bf/bin-2019/utaipan/../../sv-benchmarks/c/loop-invgen/SpamAssassin-loop_true-unreach-call_false-termination.i [2018-12-03 07:38:57,172 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8152e5f7-c187-49bb-b6bf-c761857be6bf/bin-2019/utaipan/data/430f39332/ecd8b49a076a4c9ab18a3a9683282863/FLAGf28023c57 [2018-12-03 07:38:57,469 INFO L307 CDTParser]: Found 1 translation units. [2018-12-03 07:38:57,470 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_8152e5f7-c187-49bb-b6bf-c761857be6bf/sv-benchmarks/c/loop-invgen/SpamAssassin-loop_true-unreach-call_false-termination.i [2018-12-03 07:38:57,473 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8152e5f7-c187-49bb-b6bf-c761857be6bf/bin-2019/utaipan/data/430f39332/ecd8b49a076a4c9ab18a3a9683282863/FLAGf28023c57 [2018-12-03 07:38:57,481 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_8152e5f7-c187-49bb-b6bf-c761857be6bf/bin-2019/utaipan/data/430f39332/ecd8b49a076a4c9ab18a3a9683282863 [2018-12-03 07:38:57,482 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 07:38:57,483 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-03 07:38:57,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-03 07:38:57,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-03 07:38:57,486 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-03 07:38:57,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 07:38:57" (1/1) ... [2018-12-03 07:38:57,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b368404 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:38:57, skipping insertion in model container [2018-12-03 07:38:57,488 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 07:38:57" (1/1) ... [2018-12-03 07:38:57,492 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-03 07:38:57,502 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-03 07:38:57,588 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 07:38:57,590 INFO L191 MainTranslator]: Completed pre-run [2018-12-03 07:38:57,601 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 07:38:57,609 INFO L195 MainTranslator]: Completed translation [2018-12-03 07:38:57,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:38:57 WrapperNode [2018-12-03 07:38:57,609 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-03 07:38:57,609 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 07:38:57,609 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 07:38:57,610 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 07:38:57,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:38:57" (1/1) ... [2018-12-03 07:38:57,618 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:38:57" (1/1) ... [2018-12-03 07:38:57,621 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 07:38:57,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 07:38:57,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 07:38:57,622 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 07:38:57,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:38:57" (1/1) ... [2018-12-03 07:38:57,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:38:57" (1/1) ... [2018-12-03 07:38:57,627 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:38:57" (1/1) ... [2018-12-03 07:38:57,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:38:57" (1/1) ... [2018-12-03 07:38:57,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:38:57" (1/1) ... [2018-12-03 07:38:57,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:38:57" (1/1) ... [2018-12-03 07:38:57,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:38:57" (1/1) ... [2018-12-03 07:38:57,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 07:38:57,635 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 07:38:57,635 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 07:38:57,635 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 07:38:57,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:38:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8152e5f7-c187-49bb-b6bf-c761857be6bf/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 [2018-12-03 07:38:57,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-03 07:38:57,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-03 07:38:57,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 07:38:57,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 07:38:57,700 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-03 07:38:57,700 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-03 07:38:57,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-03 07:38:57,701 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-03 07:38:57,817 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 07:38:57,817 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-03 07:38:57,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 07:38:57 BoogieIcfgContainer [2018-12-03 07:38:57,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 07:38:57,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 07:38:57,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 07:38:57,820 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 07:38:57,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 07:38:57" (1/3) ... [2018-12-03 07:38:57,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@144bfd6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 07:38:57, skipping insertion in model container [2018-12-03 07:38:57,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:38:57" (2/3) ... [2018-12-03 07:38:57,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@144bfd6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 07:38:57, skipping insertion in model container [2018-12-03 07:38:57,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 07:38:57" (3/3) ... [2018-12-03 07:38:57,822 INFO L112 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop_true-unreach-call_false-termination.i [2018-12-03 07:38:57,828 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 07:38:57,832 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 07:38:57,842 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 07:38:57,861 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 07:38:57,861 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 07:38:57,861 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 07:38:57,861 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 07:38:57,861 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 07:38:57,861 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 07:38:57,861 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 07:38:57,861 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 07:38:57,872 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2018-12-03 07:38:57,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-03 07:38:57,875 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 07:38:57,876 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 07:38:57,877 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 07:38:57,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 07:38:57,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1778619980, now seen corresponding path program 1 times [2018-12-03 07:38:57,882 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 07:38:57,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:38:57,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 07:38:57,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:38:57,912 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 07:38:57,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 07:38:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 07:38:57,986 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 07:38:57,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-03 07:38:57,986 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 07:38:57,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 07:38:57,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 07:38:57,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 07:38:57,998 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 5 states. [2018-12-03 07:38:58,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 07:38:58,090 INFO L93 Difference]: Finished difference Result 84 states and 147 transitions. [2018-12-03 07:38:58,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 07:38:58,091 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-03 07:38:58,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 07:38:58,097 INFO L225 Difference]: With dead ends: 84 [2018-12-03 07:38:58,097 INFO L226 Difference]: Without dead ends: 43 [2018-12-03 07:38:58,100 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 [2018-12-03 07:38:58,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-12-03 07:38:58,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2018-12-03 07:38:58,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-03 07:38:58,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 58 transitions. [2018-12-03 07:38:58,128 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 58 transitions. Word has length 13 [2018-12-03 07:38:58,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 07:38:58,129 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 58 transitions. [2018-12-03 07:38:58,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 07:38:58,129 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 58 transitions. [2018-12-03 07:38:58,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-03 07:38:58,130 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 07:38:58,130 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 07:38:58,130 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 07:38:58,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 07:38:58,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1756664013, now seen corresponding path program 1 times [2018-12-03 07:38:58,131 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 07:38:58,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:38:58,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 07:38:58,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:38:58,132 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 07:38:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 07:38:58,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 07:38:58,154 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 07:38:58,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-03 07:38:58,155 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 07:38:58,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 07:38:58,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 07:38:58,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 07:38:58,156 INFO L87 Difference]: Start difference. First operand 41 states and 58 transitions. Second operand 5 states. [2018-12-03 07:38:58,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 07:38:58,208 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2018-12-03 07:38:58,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 07:38:58,208 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-03 07:38:58,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 07:38:58,209 INFO L225 Difference]: With dead ends: 56 [2018-12-03 07:38:58,210 INFO L226 Difference]: Without dead ends: 54 [2018-12-03 07:38:58,210 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 [2018-12-03 07:38:58,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-12-03 07:38:58,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2018-12-03 07:38:58,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-12-03 07:38:58,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2018-12-03 07:38:58,217 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 13 [2018-12-03 07:38:58,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 07:38:58,217 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2018-12-03 07:38:58,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 07:38:58,217 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2018-12-03 07:38:58,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-03 07:38:58,218 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 07:38:58,218 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 07:38:58,218 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 07:38:58,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 07:38:58,218 INFO L82 PathProgramCache]: Analyzing trace with hash -276218857, now seen corresponding path program 1 times [2018-12-03 07:38:58,218 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 07:38:58,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:38:58,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 07:38:58,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:38:58,219 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 07:38:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 07:38:58,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 07:38:58,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 07:38:58,257 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 07:38:58,258 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 19 with the following transitions: [2018-12-03 07:38:58,259 INFO L205 CegarAbsIntRunner]: [0], [4], [8], [16], [24], [50], [66], [69], [71], [74], [76], [77], [78], [79], [105], [106], [107] [2018-12-03 07:38:58,281 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-03 07:38:58,281 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 07:38:58,367 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 07:38:58,367 INFO L272 AbstractInterpreter]: Visited 17 different actions 22 times. Never merged. Never widened. Performed 44 root evaluator evaluations with a maximum evaluation depth of 4. Performed 44 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Never found a fixpoint. Largest state had 7 variables. [2018-12-03 07:38:58,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 07:38:58,374 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 07:38:58,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 07:38:58,374 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8152e5f7-c187-49bb-b6bf-c761857be6bf/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 [2018-12-03 07:38:58,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 07:38:58,380 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 07:38:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 07:38:58,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 07:38:58,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 07:38:58,422 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 07:38:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 07:38:58,457 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-03 07:38:58,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 9 [2018-12-03 07:38:58,457 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 07:38:58,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 07:38:58,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 07:38:58,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-12-03 07:38:58,458 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand 5 states. [2018-12-03 07:38:58,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 07:38:58,503 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2018-12-03 07:38:58,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 07:38:58,503 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2018-12-03 07:38:58,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 07:38:58,505 INFO L225 Difference]: With dead ends: 56 [2018-12-03 07:38:58,506 INFO L226 Difference]: Without dead ends: 54 [2018-12-03 07:38:58,506 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-12-03 07:38:58,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-12-03 07:38:58,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-12-03 07:38:58,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-12-03 07:38:58,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2018-12-03 07:38:58,514 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 18 [2018-12-03 07:38:58,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 07:38:58,515 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2018-12-03 07:38:58,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 07:38:58,515 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2018-12-03 07:38:58,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-03 07:38:58,515 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 07:38:58,516 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 07:38:58,516 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 07:38:58,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 07:38:58,516 INFO L82 PathProgramCache]: Analyzing trace with hash -12086036, now seen corresponding path program 1 times [2018-12-03 07:38:58,516 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 07:38:58,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:38:58,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 07:38:58,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:38:58,517 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 07:38:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 07:38:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-03 07:38:58,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 07:38:58,588 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 07:38:58,589 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2018-12-03 07:38:58,589 INFO L205 CegarAbsIntRunner]: [0], [4], [8], [16], [24], [50], [66], [69], [71], [74], [76], [77], [78], [79], [105], [106], [107], [108], [109] [2018-12-03 07:38:58,590 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-03 07:38:58,590 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 07:38:58,609 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 07:38:58,609 INFO L272 AbstractInterpreter]: Visited 19 different actions 29 times. Never merged. Never widened. Performed 52 root evaluator evaluations with a maximum evaluation depth of 4. Performed 52 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Never found a fixpoint. Largest state had 7 variables. [2018-12-03 07:38:58,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 07:38:58,611 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 07:38:58,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 07:38:58,611 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8152e5f7-c187-49bb-b6bf-c761857be6bf/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 [2018-12-03 07:38:58,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 07:38:58,617 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 07:38:58,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 07:38:58,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 07:38:58,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-03 07:38:58,648 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 07:38:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-03 07:38:58,702 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-03 07:38:58,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [9] total 13 [2018-12-03 07:38:58,702 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 07:38:58,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-03 07:38:58,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-03 07:38:58,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2018-12-03 07:38:58,703 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 6 states. [2018-12-03 07:38:58,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 07:38:58,785 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2018-12-03 07:38:58,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-03 07:38:58,785 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2018-12-03 07:38:58,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 07:38:58,786 INFO L225 Difference]: With dead ends: 60 [2018-12-03 07:38:58,786 INFO L226 Difference]: Without dead ends: 58 [2018-12-03 07:38:58,786 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2018-12-03 07:38:58,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-03 07:38:58,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-12-03 07:38:58,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-12-03 07:38:58,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2018-12-03 07:38:58,793 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 23 [2018-12-03 07:38:58,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 07:38:58,794 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2018-12-03 07:38:58,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-03 07:38:58,794 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2018-12-03 07:38:58,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-03 07:38:58,795 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 07:38:58,795 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 07:38:58,795 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 07:38:58,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 07:38:58,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1403678473, now seen corresponding path program 1 times [2018-12-03 07:38:58,796 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 07:38:58,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:38:58,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 07:38:58,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:38:58,796 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 07:38:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 07:38:58,831 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-03 07:38:58,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 07:38:58,831 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 07:38:58,831 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2018-12-03 07:38:58,832 INFO L205 CegarAbsIntRunner]: [0], [4], [8], [16], [24], [50], [66], [69], [71], [74], [76], [77], [78], [79], [105], [106], [107], [108], [109], [110], [111] [2018-12-03 07:38:58,832 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-03 07:38:58,832 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 07:38:58,850 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 07:38:58,850 INFO L272 AbstractInterpreter]: Visited 21 different actions 36 times. Never merged. Never widened. Performed 60 root evaluator evaluations with a maximum evaluation depth of 4. Performed 60 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Never found a fixpoint. Largest state had 7 variables. [2018-12-03 07:38:58,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 07:38:58,851 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 07:38:58,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 07:38:58,852 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8152e5f7-c187-49bb-b6bf-c761857be6bf/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 [2018-12-03 07:38:58,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 07:38:58,857 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 07:38:58,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 07:38:58,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 07:38:58,879 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-03 07:38:58,880 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 07:38:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-03 07:38:58,917 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-03 07:38:58,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 9 [2018-12-03 07:38:58,918 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 07:38:58,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 07:38:58,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 07:38:58,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-12-03 07:38:58,918 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 5 states. [2018-12-03 07:38:58,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 07:38:58,966 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2018-12-03 07:38:58,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 07:38:58,966 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-12-03 07:38:58,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 07:38:58,967 INFO L225 Difference]: With dead ends: 65 [2018-12-03 07:38:58,967 INFO L226 Difference]: Without dead ends: 63 [2018-12-03 07:38:58,967 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-12-03 07:38:58,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-03 07:38:58,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2018-12-03 07:38:58,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-12-03 07:38:58,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2018-12-03 07:38:58,973 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 28 [2018-12-03 07:38:58,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 07:38:58,973 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2018-12-03 07:38:58,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 07:38:58,974 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2018-12-03 07:38:58,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-12-03 07:38:58,974 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 07:38:58,974 INFO L402 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 07:38:58,975 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 07:38:58,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 07:38:58,975 INFO L82 PathProgramCache]: Analyzing trace with hash -869865180, now seen corresponding path program 1 times [2018-12-03 07:38:58,975 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 07:38:58,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:38:58,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 07:38:58,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:38:58,976 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 07:38:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 07:38:59,015 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-12-03 07:38:59,016 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 07:38:59,016 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 07:38:59,016 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 47 with the following transitions: [2018-12-03 07:38:59,016 INFO L205 CegarAbsIntRunner]: [0], [4], [8], [16], [24], [27], [30], [35], [40], [66], [69], [71], [74], [76], [77], [78], [79], [81], [82], [83], [84], [85], [86], [87], [88], [89], [90], [91], [92], [93] [2018-12-03 07:38:59,017 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-03 07:38:59,017 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 07:38:59,042 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 07:38:59,042 INFO L272 AbstractInterpreter]: Visited 30 different actions 60 times. Never merged. Never widened. Performed 94 root evaluator evaluations with a maximum evaluation depth of 4. Performed 94 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Never found a fixpoint. Largest state had 10 variables. [2018-12-03 07:38:59,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 07:38:59,043 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 07:38:59,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 07:38:59,044 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8152e5f7-c187-49bb-b6bf-c761857be6bf/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 [2018-12-03 07:38:59,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 07:38:59,050 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 07:38:59,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 07:38:59,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 07:38:59,090 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-12-03 07:38:59,090 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 07:38:59,118 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-12-03 07:38:59,132 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-03 07:38:59,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 9 [2018-12-03 07:38:59,132 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 07:38:59,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-03 07:38:59,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-03 07:38:59,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-12-03 07:38:59,133 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 6 states. [2018-12-03 07:38:59,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 07:38:59,202 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2018-12-03 07:38:59,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-03 07:38:59,202 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2018-12-03 07:38:59,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 07:38:59,203 INFO L225 Difference]: With dead ends: 74 [2018-12-03 07:38:59,203 INFO L226 Difference]: Without dead ends: 72 [2018-12-03 07:38:59,203 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-12-03 07:38:59,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-12-03 07:38:59,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2018-12-03 07:38:59,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-12-03 07:38:59,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2018-12-03 07:38:59,208 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 46 [2018-12-03 07:38:59,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 07:38:59,209 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2018-12-03 07:38:59,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-03 07:38:59,209 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2018-12-03 07:38:59,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-03 07:38:59,209 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 07:38:59,209 INFO L402 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 07:38:59,210 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 07:38:59,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 07:38:59,210 INFO L82 PathProgramCache]: Analyzing trace with hash -863098428, now seen corresponding path program 1 times [2018-12-03 07:38:59,210 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 07:38:59,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:38:59,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 07:38:59,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:38:59,210 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 07:38:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 07:38:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-12-03 07:38:59,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 07:38:59,263 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 07:38:59,263 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 57 with the following transitions: [2018-12-03 07:38:59,263 INFO L205 CegarAbsIntRunner]: [0], [4], [8], [16], [24], [27], [30], [35], [40], [66], [69], [71], [74], [76], [77], [78], [79], [81], [82], [83], [84], [85], [86], [87], [88], [89], [90], [91], [92], [93], [94], [95], [96], [97] [2018-12-03 07:38:59,264 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-03 07:38:59,264 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 07:38:59,289 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 07:38:59,289 INFO L272 AbstractInterpreter]: Visited 34 different actions 74 times. Never merged. Never widened. Performed 110 root evaluator evaluations with a maximum evaluation depth of 4. Performed 110 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Never found a fixpoint. Largest state had 10 variables. [2018-12-03 07:38:59,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 07:38:59,290 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 07:38:59,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 07:38:59,290 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8152e5f7-c187-49bb-b6bf-c761857be6bf/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 [2018-12-03 07:38:59,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 07:38:59,296 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 07:38:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 07:38:59,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 07:38:59,331 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-12-03 07:38:59,331 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 07:38:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-12-03 07:38:59,391 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-03 07:38:59,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [9] total 14 [2018-12-03 07:38:59,391 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 07:38:59,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-03 07:38:59,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-03 07:38:59,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2018-12-03 07:38:59,392 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 7 states. [2018-12-03 07:38:59,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 07:38:59,498 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2018-12-03 07:38:59,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-03 07:38:59,498 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2018-12-03 07:38:59,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 07:38:59,499 INFO L225 Difference]: With dead ends: 74 [2018-12-03 07:38:59,499 INFO L226 Difference]: Without dead ends: 72 [2018-12-03 07:38:59,500 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2018-12-03 07:38:59,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-12-03 07:38:59,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2018-12-03 07:38:59,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-12-03 07:38:59,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2018-12-03 07:38:59,508 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 56 [2018-12-03 07:38:59,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 07:38:59,509 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2018-12-03 07:38:59,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-03 07:38:59,509 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2018-12-03 07:38:59,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-12-03 07:38:59,510 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 07:38:59,510 INFO L402 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 07:38:59,510 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 07:38:59,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 07:38:59,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1349635161, now seen corresponding path program 1 times [2018-12-03 07:38:59,511 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 07:38:59,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:38:59,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 07:38:59,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:38:59,512 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 07:38:59,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 07:38:59,591 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 28 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-12-03 07:38:59,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 07:38:59,591 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 07:38:59,591 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 68 with the following transitions: [2018-12-03 07:38:59,591 INFO L205 CegarAbsIntRunner]: [0], [4], [8], [16], [24], [27], [30], [35], [40], [45], [66], [69], [71], [74], [76], [77], [78], [79], [81], [82], [83], [84], [85], [86], [87], [88], [89], [90], [91], [92], [93], [94], [95], [96], [97], [98], [99], [100], [101] [2018-12-03 07:38:59,592 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-03 07:38:59,592 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 07:38:59,622 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 07:38:59,623 INFO L272 AbstractInterpreter]: Visited 39 different actions 89 times. Never merged. Never widened. Performed 130 root evaluator evaluations with a maximum evaluation depth of 4. Performed 130 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Never found a fixpoint. Largest state had 12 variables. [2018-12-03 07:38:59,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 07:38:59,624 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 07:38:59,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 07:38:59,624 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8152e5f7-c187-49bb-b6bf-c761857be6bf/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 07:38:59,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 07:38:59,630 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 07:38:59,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 07:38:59,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 07:38:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-12-03 07:38:59,668 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 07:38:59,734 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-12-03 07:38:59,748 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-03 07:38:59,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [10] total 15 [2018-12-03 07:38:59,748 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 07:38:59,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-03 07:38:59,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-03 07:38:59,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-12-03 07:38:59,749 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 8 states. [2018-12-03 07:38:59,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 07:38:59,862 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2018-12-03 07:38:59,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-03 07:38:59,862 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2018-12-03 07:38:59,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 07:38:59,862 INFO L225 Difference]: With dead ends: 72 [2018-12-03 07:38:59,862 INFO L226 Difference]: Without dead ends: 0 [2018-12-03 07:38:59,863 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2018-12-03 07:38:59,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-03 07:38:59,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-03 07:38:59,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-03 07:38:59,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-03 07:38:59,863 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 67 [2018-12-03 07:38:59,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 07:38:59,863 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-03 07:38:59,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-03 07:38:59,863 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-03 07:38:59,864 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-03 07:38:59,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-03 07:39:00,017 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-03 07:39:00,017 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-03 07:39:00,017 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-03 07:39:00,017 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-03 07:39:00,017 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-03 07:39:00,018 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-03 07:39:00,018 INFO L444 ceAbstractionStarter]: At program point L27(line 27) the Hoare annotation is: (and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~i~0 2) main_~len~0) (<= (+ main_~j~0 5) main_~bufsize~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2018-12-03 07:39:00,018 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 10 53) no Hoare annotation was computed. [2018-12-03 07:39:00,018 INFO L444 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~i~0 2) main_~len~0) (<= (+ main_~j~0 5) main_~bufsize~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2018-12-03 07:39:00,018 INFO L444 ceAbstractionStarter]: At program point L23-1(line 23) the Hoare annotation is: (and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~i~0 2) main_~len~0) (<= (+ main_~j~0 5) main_~bufsize~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2018-12-03 07:39:00,018 INFO L444 ceAbstractionStarter]: At program point L44(line 44) the Hoare annotation is: (and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~i~0 1) main_~len~0) (<= (+ main_~j~0 5) main_~bufsize~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2018-12-03 07:39:00,018 INFO L444 ceAbstractionStarter]: At program point L32(line 32) the Hoare annotation is: (and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~i~0 1) main_~len~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2018-12-03 07:39:00,019 INFO L444 ceAbstractionStarter]: At program point L32-1(line 32) the Hoare annotation is: (and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~i~0 1) main_~len~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2018-12-03 07:39:00,019 INFO L444 ceAbstractionStarter]: At program point L28(line 28) the Hoare annotation is: (and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~i~0 2) main_~len~0) (<= (+ main_~j~0 5) main_~bufsize~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2018-12-03 07:39:00,019 INFO L448 ceAbstractionStarter]: For program point L24(line 24) no Hoare annotation was computed. [2018-12-03 07:39:00,019 INFO L444 ceAbstractionStarter]: At program point L20-2(lines 20 51) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2018-12-03 07:39:00,019 INFO L448 ceAbstractionStarter]: For program point L20-3(lines 20 51) no Hoare annotation was computed. [2018-12-03 07:39:00,019 INFO L444 ceAbstractionStarter]: At program point L45(line 45) the Hoare annotation is: (and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~i~0 1) main_~len~0) (<= (+ main_~j~0 5) main_~bufsize~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2018-12-03 07:39:00,019 INFO L444 ceAbstractionStarter]: At program point L33(line 33) the Hoare annotation is: (and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~i~0 1) main_~len~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2018-12-03 07:39:00,020 INFO L448 ceAbstractionStarter]: For program point L29(line 29) no Hoare annotation was computed. [2018-12-03 07:39:00,020 INFO L448 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2018-12-03 07:39:00,020 INFO L444 ceAbstractionStarter]: At program point L21-2(lines 21 50) the Hoare annotation is: (and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2018-12-03 07:39:00,020 INFO L448 ceAbstractionStarter]: For program point L17(line 17) no Hoare annotation was computed. [2018-12-03 07:39:00,020 INFO L448 ceAbstractionStarter]: For program point L46(line 46) no Hoare annotation was computed. [2018-12-03 07:39:00,020 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 10 53) no Hoare annotation was computed. [2018-12-03 07:39:00,020 INFO L444 ceAbstractionStarter]: At program point L42(lines 22 49) the Hoare annotation is: (and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~i~0 1) main_~len~0) (<= (+ main_~j~0 5) main_~bufsize~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2018-12-03 07:39:00,020 INFO L444 ceAbstractionStarter]: At program point L38(line 38) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2018-12-03 07:39:00,021 INFO L444 ceAbstractionStarter]: At program point L38-1(line 38) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2018-12-03 07:39:00,021 INFO L444 ceAbstractionStarter]: At program point L34(line 34) the Hoare annotation is: (and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~i~0 1) main_~len~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2018-12-03 07:39:00,021 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 10 53) the Hoare annotation is: true [2018-12-03 07:39:00,021 INFO L444 ceAbstractionStarter]: At program point L26(line 26) the Hoare annotation is: (and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~i~0 2) main_~len~0) (<= (+ main_~j~0 5) main_~bufsize~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2018-12-03 07:39:00,021 INFO L444 ceAbstractionStarter]: At program point L26-1(line 26) the Hoare annotation is: (and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~i~0 2) main_~len~0) (<= (+ main_~j~0 5) main_~bufsize~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2018-12-03 07:39:00,021 INFO L448 ceAbstractionStarter]: For program point L22(lines 22 49) no Hoare annotation was computed. [2018-12-03 07:39:00,021 INFO L444 ceAbstractionStarter]: At program point L43(line 43) the Hoare annotation is: (and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~i~0 1) main_~len~0) (<= (+ main_~j~0 5) main_~bufsize~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2018-12-03 07:39:00,021 INFO L448 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2018-12-03 07:39:00,021 INFO L448 ceAbstractionStarter]: For program point L35(line 35) no Hoare annotation was computed. [2018-12-03 07:39:00,022 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-12-03 07:39:00,022 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-12-03 07:39:00,022 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-12-03 07:39:00,022 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-12-03 07:39:00,022 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-12-03 07:39:00,022 INFO L448 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-12-03 07:39:00,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 07:39:00 BoogieIcfgContainer [2018-12-03 07:39:00,031 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 07:39:00,032 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-03 07:39:00,032 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-03 07:39:00,032 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-03 07:39:00,032 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 07:38:57" (3/4) ... [2018-12-03 07:39:00,034 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-03 07:39:00,038 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-03 07:39:00,038 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-03 07:39:00,038 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-12-03 07:39:00,041 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2018-12-03 07:39:00,041 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-12-03 07:39:00,041 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-03 07:39:00,069 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_8152e5f7-c187-49bb-b6bf-c761857be6bf/bin-2019/utaipan/witness.graphml [2018-12-03 07:39:00,069 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-03 07:39:00,069 INFO L168 Benchmark]: Toolchain (without parser) took 2586.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 206.6 MB). Free memory was 951.3 MB in the beginning and 1.1 GB in the end (delta: -98.7 MB). Peak memory consumption was 107.9 MB. Max. memory is 11.5 GB. [2018-12-03 07:39:00,070 INFO L168 Benchmark]: CDTParser took 0.12 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. [2018-12-03 07:39:00,071 INFO L168 Benchmark]: CACSL2BoogieTranslator took 125.33 ms. Allocated memory is still 1.0 GB. Free memory was 951.3 MB in the beginning and 940.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-03 07:39:00,071 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.94 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 07:39:00,071 INFO L168 Benchmark]: Boogie Preprocessor took 13.12 ms. Allocated memory is still 1.0 GB. Free memory was 940.6 MB in the beginning and 935.2 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-03 07:39:00,071 INFO L168 Benchmark]: RCFGBuilder took 182.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.3 MB). Free memory was 935.2 MB in the beginning and 1.1 GB in the end (delta: -164.9 MB). Peak memory consumption was 13.1 MB. Max. memory is 11.5 GB. [2018-12-03 07:39:00,072 INFO L168 Benchmark]: TraceAbstraction took 2213.60 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 82.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 50.1 MB). Peak memory consumption was 132.4 MB. Max. memory is 11.5 GB. [2018-12-03 07:39:00,072 INFO L168 Benchmark]: Witness Printer took 37.31 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 07:39:00,073 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 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 125.33 ms. Allocated memory is still 1.0 GB. Free memory was 951.3 MB in the beginning and 940.6 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 11.94 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.12 ms. Allocated memory is still 1.0 GB. Free memory was 940.6 MB in the beginning and 935.2 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 182.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.3 MB). Free memory was 935.2 MB in the beginning and 1.1 GB in the end (delta: -164.9 MB). Peak memory consumption was 13.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2213.60 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 82.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 50.1 MB). Peak memory consumption was 132.4 MB. Max. memory is 11.5 GB. * Witness Printer took 37.31 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. 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: 20]: Loop Invariant Derived loop invariant: 0 <= i && limit + 4 <= bufsize - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (0 <= j && 0 <= i) && limit + 4 <= bufsize - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((0 <= j && 0 <= i) && i + 1 <= len) && j + 5 <= bufsize) && limit + 4 <= bufsize - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 42 locations, 1 error locations. SAFE Result, 2.1s OverallTime, 8 OverallIterations, 11 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 395 SDtfs, 110 SDslu, 984 SDs, 0 SdLazy, 514 SolverSat, 134 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 553 GetRequests, 466 SyntacticMatches, 10 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 6 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 23 LocationsWithAnnotation, 55 PreInvPairs, 76 NumberOfFragments, 369 HoareAnnotationTreeSize, 55 FomulaSimplifications, 621 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 23 FomulaSimplificationsInter, 43 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 502 NumberOfCodeBlocks, 502 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 720 ConstructedInterpolants, 0 QuantifiedInterpolants, 72546 SizeOfPredicates, 23 NumberOfNonLiveVariables, 526 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 20 InterpolantComputations, 14 PerfectInterpolantSequences, 1206/1284 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...