./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.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 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_b060e891-698b-438f-a237-d26fc7214913/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b060e891-698b-438f-a237-d26fc7214913/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b060e891-698b-438f-a237-d26fc7214913/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b060e891-698b-438f-a237-d26fc7214913/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_b060e891-698b-438f-a237-d26fc7214913/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b060e891-698b-438f-a237-d26fc7214913/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 0.1.23-5842f4b [2018-11-18 10:50:29,528 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 10:50:29,529 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 10:50:29,537 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 10:50:29,537 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 10:50:29,538 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 10:50:29,538 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 10:50:29,540 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 10:50:29,541 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 10:50:29,541 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 10:50:29,542 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 10:50:29,542 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 10:50:29,543 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 10:50:29,543 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 10:50:29,544 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 10:50:29,544 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 10:50:29,545 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 10:50:29,546 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 10:50:29,548 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 10:50:29,549 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 10:50:29,549 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 10:50:29,550 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 10:50:29,552 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 10:50:29,552 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 10:50:29,552 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 10:50:29,553 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 10:50:29,553 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 10:50:29,554 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 10:50:29,554 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 10:50:29,555 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 10:50:29,555 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 10:50:29,556 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 10:50:29,556 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 10:50:29,556 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 10:50:29,557 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 10:50:29,557 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 10:50:29,557 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_b060e891-698b-438f-a237-d26fc7214913/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 10:50:29,567 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 10:50:29,567 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 10:50:29,568 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 10:50:29,568 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 10:50:29,568 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 10:50:29,568 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 10:50:29,568 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 10:50:29,568 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 10:50:29,568 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 10:50:29,568 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 10:50:29,569 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 10:50:29,569 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 10:50:29,569 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 10:50:29,569 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 10:50:29,569 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 10:50:29,569 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 10:50:29,570 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 10:50:29,570 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 10:50:29,570 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 10:50:29,570 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 10:50:29,570 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 10:50:29,570 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 10:50:29,570 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 10:50:29,570 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 10:50:29,571 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 10:50:29,571 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 10:50:29,571 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 10:50:29,571 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 10:50:29,571 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 10:50:29,571 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 10:50:29,571 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 10:50:29,572 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 10:50:29,572 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 10:50:29,572 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 10:50:29,572 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 10:50:29,572 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 10:50:29,572 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 10:50:29,572 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_b060e891-698b-438f-a237-d26fc7214913/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 [2018-11-18 10:50:29,596 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 10:50:29,605 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 10:50:29,608 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 10:50:29,609 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 10:50:29,609 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 10:50:29,610 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b060e891-698b-438f-a237-d26fc7214913/bin-2019/utaipan/../../sv-benchmarks/c/loop-invgen/SpamAssassin-loop_true-unreach-call_false-termination.i [2018-11-18 10:50:29,653 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b060e891-698b-438f-a237-d26fc7214913/bin-2019/utaipan/data/406d06087/cfd446146b384798b5f44c7d54305e13/FLAG26a0335fc [2018-11-18 10:50:30,049 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 10:50:30,049 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b060e891-698b-438f-a237-d26fc7214913/sv-benchmarks/c/loop-invgen/SpamAssassin-loop_true-unreach-call_false-termination.i [2018-11-18 10:50:30,053 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b060e891-698b-438f-a237-d26fc7214913/bin-2019/utaipan/data/406d06087/cfd446146b384798b5f44c7d54305e13/FLAG26a0335fc [2018-11-18 10:50:30,061 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b060e891-698b-438f-a237-d26fc7214913/bin-2019/utaipan/data/406d06087/cfd446146b384798b5f44c7d54305e13 [2018-11-18 10:50:30,064 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 10:50:30,064 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 10:50:30,065 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 10:50:30,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 10:50:30,067 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 10:50:30,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 10:50:30" (1/1) ... [2018-11-18 10:50:30,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@399b9200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:30, skipping insertion in model container [2018-11-18 10:50:30,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 10:50:30" (1/1) ... [2018-11-18 10:50:30,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 10:50:30,089 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 10:50:30,199 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 10:50:30,202 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 10:50:30,213 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 10:50:30,222 INFO L195 MainTranslator]: Completed translation [2018-11-18 10:50:30,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:30 WrapperNode [2018-11-18 10:50:30,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 10:50:30,222 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 10:50:30,223 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 10:50:30,223 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 10:50:30,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:30" (1/1) ... [2018-11-18 10:50:30,235 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:30" (1/1) ... [2018-11-18 10:50:30,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 10:50:30,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 10:50:30,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 10:50:30,240 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 10:50:30,248 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:30" (1/1) ... [2018-11-18 10:50:30,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:30" (1/1) ... [2018-11-18 10:50:30,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:30" (1/1) ... [2018-11-18 10:50:30,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:30" (1/1) ... [2018-11-18 10:50:30,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:30" (1/1) ... [2018-11-18 10:50:30,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:30" (1/1) ... [2018-11-18 10:50:30,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:30" (1/1) ... [2018-11-18 10:50:30,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 10:50:30,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 10:50:30,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 10:50:30,260 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 10:50:30,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b060e891-698b-438f-a237-d26fc7214913/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 [2018-11-18 10:50:30,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 10:50:30,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 10:50:30,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 10:50:30,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 10:50:30,345 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 10:50:30,345 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 10:50:30,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-18 10:50:30,346 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-18 10:50:30,481 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 10:50:30,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:50:30 BoogieIcfgContainer [2018-11-18 10:50:30,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 10:50:30,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 10:50:30,482 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 10:50:30,485 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 10:50:30,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 10:50:30" (1/3) ... [2018-11-18 10:50:30,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@787749fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 10:50:30, skipping insertion in model container [2018-11-18 10:50:30,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:30" (2/3) ... [2018-11-18 10:50:30,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@787749fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 10:50:30, skipping insertion in model container [2018-11-18 10:50:30,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:50:30" (3/3) ... [2018-11-18 10:50:30,488 INFO L112 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop_true-unreach-call_false-termination.i [2018-11-18 10:50:30,496 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 10:50:30,503 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 10:50:30,516 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 10:50:30,543 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 10:50:30,543 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 10:50:30,543 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 10:50:30,543 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 10:50:30,543 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 10:50:30,544 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 10:50:30,544 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 10:50:30,544 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 10:50:30,558 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2018-11-18 10:50:30,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-18 10:50:30,562 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:50:30,563 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:50:30,564 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:50:30,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:30,567 INFO L82 PathProgramCache]: Analyzing trace with hash -372910930, now seen corresponding path program 1 times [2018-11-18 10:50:30,569 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:50:30,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:30,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:30,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:30,598 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:50:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:30,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:30,697 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:50:30,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 10:50:30,697 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:50:30,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 10:50:30,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 10:50:30,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:50:30,709 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 5 states. [2018-11-18 10:50:30,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:50:30,838 INFO L93 Difference]: Finished difference Result 90 states and 153 transitions. [2018-11-18 10:50:30,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 10:50:30,840 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-11-18 10:50:30,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:50:30,846 INFO L225 Difference]: With dead ends: 90 [2018-11-18 10:50:30,846 INFO L226 Difference]: Without dead ends: 47 [2018-11-18 10:50:30,849 INFO L604 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 [2018-11-18 10:50:30,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-11-18 10:50:30,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2018-11-18 10:50:30,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-18 10:50:30,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2018-11-18 10:50:30,882 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 15 [2018-11-18 10:50:30,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:50:30,883 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2018-11-18 10:50:30,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 10:50:30,883 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2018-11-18 10:50:30,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-18 10:50:30,884 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:50:30,884 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:50:30,885 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:50:30,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:30,885 INFO L82 PathProgramCache]: Analyzing trace with hash -394866897, now seen corresponding path program 1 times [2018-11-18 10:50:30,885 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:50:30,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:30,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:30,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:30,886 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:50:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:30,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:30,934 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:50:30,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 10:50:30,934 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:50:30,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 10:50:30,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 10:50:30,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:50:30,937 INFO L87 Difference]: Start difference. First operand 43 states and 60 transitions. Second operand 5 states. [2018-11-18 10:50:31,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:50:31,028 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2018-11-18 10:50:31,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 10:50:31,028 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-11-18 10:50:31,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:50:31,030 INFO L225 Difference]: With dead ends: 58 [2018-11-18 10:50:31,030 INFO L226 Difference]: Without dead ends: 56 [2018-11-18 10:50:31,030 INFO L604 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 [2018-11-18 10:50:31,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-11-18 10:50:31,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2018-11-18 10:50:31,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-11-18 10:50:31,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 68 transitions. [2018-11-18 10:50:31,041 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 68 transitions. Word has length 15 [2018-11-18 10:50:31,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:50:31,042 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 68 transitions. [2018-11-18 10:50:31,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 10:50:31,042 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 68 transitions. [2018-11-18 10:50:31,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-18 10:50:31,042 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:50:31,042 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:50:31,043 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:50:31,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:31,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1825950327, now seen corresponding path program 1 times [2018-11-18 10:50:31,043 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:50:31,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:31,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:31,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:31,044 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:50:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:31,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:50:31,099 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:50:31,100 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 21 with the following transitions: [2018-11-18 10:50:31,101 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [17], [21], [26], [52], [68], [71], [73], [76], [78], [79], [80], [81], [107], [108], [109] [2018-11-18 10:50:31,124 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 10:50:31,124 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 10:50:31,206 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 10:50:31,207 INFO L272 AbstractInterpreter]: Visited 19 different actions 24 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. [2018-11-18 10:50:31,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:31,212 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 10:50:31,213 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:50:31,213 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b060e891-698b-438f-a237-d26fc7214913/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 [2018-11-18 10:50:31,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:31,219 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 10:50:31,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:31,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:50:31,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:31,276 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:50:31,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:31,302 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 10:50:31,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 9 [2018-11-18 10:50:31,302 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:50:31,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 10:50:31,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 10:50:31,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-11-18 10:50:31,303 INFO L87 Difference]: Start difference. First operand 52 states and 68 transitions. Second operand 5 states. [2018-11-18 10:50:31,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:50:31,368 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2018-11-18 10:50:31,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 10:50:31,368 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-11-18 10:50:31,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:50:31,370 INFO L225 Difference]: With dead ends: 58 [2018-11-18 10:50:31,371 INFO L226 Difference]: Without dead ends: 56 [2018-11-18 10:50:31,371 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-18 10:50:31,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-11-18 10:50:31,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-11-18 10:50:31,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-11-18 10:50:31,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2018-11-18 10:50:31,379 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 20 [2018-11-18 10:50:31,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:50:31,380 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2018-11-18 10:50:31,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 10:50:31,380 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2018-11-18 10:50:31,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-18 10:50:31,380 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:50:31,381 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:50:31,381 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:50:31,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:31,381 INFO L82 PathProgramCache]: Analyzing trace with hash -443407858, now seen corresponding path program 1 times [2018-11-18 10:50:31,381 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:50:31,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:31,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:31,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:31,382 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:50:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:31,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 10:50:31,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:50:31,459 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:50:31,459 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 26 with the following transitions: [2018-11-18 10:50:31,459 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [17], [21], [26], [52], [68], [71], [73], [76], [78], [79], [80], [81], [107], [108], [109], [110], [111] [2018-11-18 10:50:31,460 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 10:50:31,460 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 10:50:31,484 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 10:50:31,484 INFO L272 AbstractInterpreter]: Visited 21 different actions 31 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. [2018-11-18 10:50:31,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:31,488 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 10:50:31,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:50:31,488 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b060e891-698b-438f-a237-d26fc7214913/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 [2018-11-18 10:50:31,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:31,496 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 10:50:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:31,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:50:31,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 10:50:31,551 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:50:31,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 10:50:31,611 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 10:50:31,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [9] total 13 [2018-11-18 10:50:31,611 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:50:31,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 10:50:31,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 10:50:31,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2018-11-18 10:50:31,612 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand 6 states. [2018-11-18 10:50:31,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:50:31,707 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2018-11-18 10:50:31,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 10:50:31,707 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-11-18 10:50:31,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:50:31,708 INFO L225 Difference]: With dead ends: 62 [2018-11-18 10:50:31,708 INFO L226 Difference]: Without dead ends: 60 [2018-11-18 10:50:31,709 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2018-11-18 10:50:31,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-18 10:50:31,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-18 10:50:31,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-18 10:50:31,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2018-11-18 10:50:31,717 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 25 [2018-11-18 10:50:31,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:50:31,717 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2018-11-18 10:50:31,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 10:50:31,717 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2018-11-18 10:50:31,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-11-18 10:50:31,718 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:50:31,718 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:50:31,718 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:50:31,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:31,719 INFO L82 PathProgramCache]: Analyzing trace with hash -105052009, now seen corresponding path program 1 times [2018-11-18 10:50:31,719 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:50:31,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:31,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:31,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:31,720 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:50:31,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-18 10:50:31,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:50:31,763 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:50:31,763 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 31 with the following transitions: [2018-11-18 10:50:31,763 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [17], [21], [26], [52], [68], [71], [73], [76], [78], [79], [80], [81], [107], [108], [109], [110], [111], [112], [113] [2018-11-18 10:50:31,765 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 10:50:31,765 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 10:50:31,788 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 10:50:31,788 INFO L272 AbstractInterpreter]: Visited 23 different actions 38 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. [2018-11-18 10:50:31,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:31,789 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 10:50:31,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:50:31,789 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b060e891-698b-438f-a237-d26fc7214913/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 [2018-11-18 10:50:31,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:31,795 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 10:50:31,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:31,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:50:31,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-18 10:50:31,832 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:50:31,848 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-18 10:50:31,863 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 10:50:31,864 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 9 [2018-11-18 10:50:31,864 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:50:31,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 10:50:31,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 10:50:31,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-11-18 10:50:31,865 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand 5 states. [2018-11-18 10:50:31,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:50:31,927 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2018-11-18 10:50:31,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 10:50:31,928 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2018-11-18 10:50:31,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:50:31,929 INFO L225 Difference]: With dead ends: 68 [2018-11-18 10:50:31,929 INFO L226 Difference]: Without dead ends: 66 [2018-11-18 10:50:31,929 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-18 10:50:31,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-18 10:50:31,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2018-11-18 10:50:31,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-18 10:50:31,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2018-11-18 10:50:31,937 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 30 [2018-11-18 10:50:31,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:50:31,938 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2018-11-18 10:50:31,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 10:50:31,938 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2018-11-18 10:50:31,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-11-18 10:50:31,940 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:50:31,940 INFO L375 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, 1, 1] [2018-11-18 10:50:31,940 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:50:31,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:31,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1255310588, now seen corresponding path program 1 times [2018-11-18 10:50:31,940 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:50:31,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:31,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:31,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:31,941 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:50:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:31,990 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-11-18 10:50:31,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:50:31,990 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:50:31,990 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 49 with the following transitions: [2018-11-18 10:50:31,990 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [17], [21], [26], [29], [32], [37], [42], [68], [71], [73], [76], [78], [79], [80], [81], [83], [84], [85], [86], [87], [88], [89], [90], [91], [92], [93], [94], [95] [2018-11-18 10:50:31,991 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 10:50:31,992 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 10:50:32,027 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 10:50:32,027 INFO L272 AbstractInterpreter]: Visited 32 different actions 62 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. [2018-11-18 10:50:32,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:32,031 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 10:50:32,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:50:32,031 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b060e891-698b-438f-a237-d26fc7214913/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 [2018-11-18 10:50:32,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:32,042 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 10:50:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:32,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:50:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-11-18 10:50:32,092 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:50:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-11-18 10:50:32,144 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 10:50:32,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 9 [2018-11-18 10:50:32,145 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:50:32,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 10:50:32,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 10:50:32,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-11-18 10:50:32,146 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand 6 states. [2018-11-18 10:50:32,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:50:32,215 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2018-11-18 10:50:32,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 10:50:32,215 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2018-11-18 10:50:32,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:50:32,216 INFO L225 Difference]: With dead ends: 78 [2018-11-18 10:50:32,216 INFO L226 Difference]: Without dead ends: 76 [2018-11-18 10:50:32,216 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-18 10:50:32,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-11-18 10:50:32,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2018-11-18 10:50:32,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-11-18 10:50:32,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2018-11-18 10:50:32,222 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 48 [2018-11-18 10:50:32,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:50:32,223 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2018-11-18 10:50:32,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 10:50:32,223 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2018-11-18 10:50:32,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-18 10:50:32,224 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:50:32,224 INFO L375 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, 1, 1] [2018-11-18 10:50:32,224 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:50:32,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:32,224 INFO L82 PathProgramCache]: Analyzing trace with hash -979286812, now seen corresponding path program 1 times [2018-11-18 10:50:32,224 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:50:32,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:32,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:32,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:32,225 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:50:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-11-18 10:50:32,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:50:32,285 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:50:32,285 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 59 with the following transitions: [2018-11-18 10:50:32,285 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [17], [21], [26], [29], [32], [37], [42], [68], [71], [73], [76], [78], [79], [80], [81], [83], [84], [85], [86], [87], [88], [89], [90], [91], [92], [93], [94], [95], [96], [97], [98], [99] [2018-11-18 10:50:32,287 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 10:50:32,287 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 10:50:32,322 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 10:50:32,323 INFO L272 AbstractInterpreter]: Visited 36 different actions 76 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. [2018-11-18 10:50:32,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:32,343 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 10:50:32,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:50:32,343 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b060e891-698b-438f-a237-d26fc7214913/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 [2018-11-18 10:50:32,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:32,357 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 10:50:32,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:32,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:50:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-11-18 10:50:32,406 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:50:32,446 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-11-18 10:50:32,462 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 10:50:32,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [9] total 14 [2018-11-18 10:50:32,462 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:50:32,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 10:50:32,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 10:50:32,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2018-11-18 10:50:32,463 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand 7 states. [2018-11-18 10:50:32,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:50:32,566 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2018-11-18 10:50:32,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 10:50:32,566 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2018-11-18 10:50:32,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:50:32,567 INFO L225 Difference]: With dead ends: 78 [2018-11-18 10:50:32,567 INFO L226 Difference]: Without dead ends: 76 [2018-11-18 10:50:32,567 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2018-11-18 10:50:32,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-11-18 10:50:32,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2018-11-18 10:50:32,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-11-18 10:50:32,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2018-11-18 10:50:32,576 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 58 [2018-11-18 10:50:32,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:50:32,577 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2018-11-18 10:50:32,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 10:50:32,577 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2018-11-18 10:50:32,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-11-18 10:50:32,578 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:50:32,578 INFO L375 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, 1, 1] [2018-11-18 10:50:32,578 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:50:32,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:32,578 INFO L82 PathProgramCache]: Analyzing trace with hash -2026132663, now seen corresponding path program 1 times [2018-11-18 10:50:32,579 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:50:32,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:32,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:32,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:32,579 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:50:32,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 28 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-11-18 10:50:32,655 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:50:32,655 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:50:32,655 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 70 with the following transitions: [2018-11-18 10:50:32,656 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [17], [21], [26], [29], [32], [37], [42], [47], [68], [71], [73], [76], [78], [79], [80], [81], [83], [84], [85], [86], [87], [88], [89], [90], [91], [92], [93], [94], [95], [96], [97], [98], [99], [100], [101], [102], [103] [2018-11-18 10:50:32,657 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 10:50:32,657 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 10:50:32,689 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 10:50:32,689 INFO L272 AbstractInterpreter]: Visited 41 different actions 91 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. [2018-11-18 10:50:32,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:32,691 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 10:50:32,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:50:32,691 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b060e891-698b-438f-a237-d26fc7214913/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 [2018-11-18 10:50:32,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:32,698 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 10:50:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:32,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:50:32,728 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-11-18 10:50:32,728 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:50:32,782 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-11-18 10:50:32,807 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 10:50:32,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [10] total 15 [2018-11-18 10:50:32,807 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:50:32,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 10:50:32,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 10:50:32,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-11-18 10:50:32,808 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand 8 states. [2018-11-18 10:50:32,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:50:32,913 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2018-11-18 10:50:32,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 10:50:32,913 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2018-11-18 10:50:32,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:50:32,914 INFO L225 Difference]: With dead ends: 76 [2018-11-18 10:50:32,914 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 10:50:32,914 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2018-11-18 10:50:32,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 10:50:32,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 10:50:32,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 10:50:32,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 10:50:32,915 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 69 [2018-11-18 10:50:32,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:50:32,915 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 10:50:32,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 10:50:32,915 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 10:50:32,915 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 10:50:32,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 10:50:33,121 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 10:50:33,121 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 10:50:33,121 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 10:50:33,121 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 10:50:33,121 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 10:50:33,121 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 10:50:33,121 INFO L421 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)) [2018-11-18 10:50:33,121 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 53) no Hoare annotation was computed. [2018-11-18 10:50:33,121 INFO L421 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)) [2018-11-18 10:50:33,121 INFO L421 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)) [2018-11-18 10:50:33,121 INFO L421 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)) [2018-11-18 10:50:33,121 INFO L421 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)) [2018-11-18 10:50:33,122 INFO L421 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)) [2018-11-18 10:50:33,122 INFO L421 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)) [2018-11-18 10:50:33,122 INFO L425 ceAbstractionStarter]: For program point L24(line 24) no Hoare annotation was computed. [2018-11-18 10:50:33,122 INFO L425 ceAbstractionStarter]: For program point L20-1(lines 20 51) no Hoare annotation was computed. [2018-11-18 10:50:33,122 INFO L421 ceAbstractionStarter]: At program point L20-3(lines 20 51) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2018-11-18 10:50:33,122 INFO L425 ceAbstractionStarter]: For program point L20-4(lines 20 51) no Hoare annotation was computed. [2018-11-18 10:50:33,122 INFO L421 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)) [2018-11-18 10:50:33,122 INFO L421 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)) [2018-11-18 10:50:33,122 INFO L425 ceAbstractionStarter]: For program point L29(line 29) no Hoare annotation was computed. [2018-11-18 10:50:33,122 INFO L425 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2018-11-18 10:50:33,122 INFO L425 ceAbstractionStarter]: For program point L21-1(lines 21 50) no Hoare annotation was computed. [2018-11-18 10:50:33,122 INFO L421 ceAbstractionStarter]: At program point L21-3(lines 21 50) the Hoare annotation is: (and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2018-11-18 10:50:33,122 INFO L425 ceAbstractionStarter]: For program point L17(line 17) no Hoare annotation was computed. [2018-11-18 10:50:33,122 INFO L425 ceAbstractionStarter]: For program point L46(line 46) no Hoare annotation was computed. [2018-11-18 10:50:33,123 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 53) no Hoare annotation was computed. [2018-11-18 10:50:33,123 INFO L421 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)) [2018-11-18 10:50:33,123 INFO L421 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)) [2018-11-18 10:50:33,123 INFO L421 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)) [2018-11-18 10:50:33,123 INFO L421 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)) [2018-11-18 10:50:33,123 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 53) the Hoare annotation is: true [2018-11-18 10:50:33,123 INFO L421 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)) [2018-11-18 10:50:33,123 INFO L421 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)) [2018-11-18 10:50:33,123 INFO L425 ceAbstractionStarter]: For program point L22(lines 22 49) no Hoare annotation was computed. [2018-11-18 10:50:33,123 INFO L421 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)) [2018-11-18 10:50:33,123 INFO L425 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2018-11-18 10:50:33,123 INFO L425 ceAbstractionStarter]: For program point L35(line 35) no Hoare annotation was computed. [2018-11-18 10:50:33,123 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-11-18 10:50:33,124 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-11-18 10:50:33,124 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-11-18 10:50:33,124 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-18 10:50:33,124 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-11-18 10:50:33,124 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-11-18 10:50:33,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 10:50:33 BoogieIcfgContainer [2018-11-18 10:50:33,135 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 10:50:33,135 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 10:50:33,135 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 10:50:33,136 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 10:50:33,136 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:50:30" (3/4) ... [2018-11-18 10:50:33,141 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 10:50:33,145 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 10:50:33,146 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 10:50:33,146 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-18 10:50:33,149 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2018-11-18 10:50:33,150 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-11-18 10:50:33,150 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 10:50:33,195 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_b060e891-698b-438f-a237-d26fc7214913/bin-2019/utaipan/witness.graphml [2018-11-18 10:50:33,195 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 10:50:33,196 INFO L168 Benchmark]: Toolchain (without parser) took 3132.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 200.8 MB). Free memory was 959.1 MB in the beginning and 1.0 GB in the end (delta: -70.2 MB). Peak memory consumption was 130.7 MB. Max. memory is 11.5 GB. [2018-11-18 10:50:33,198 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 10:50:33,198 INFO L168 Benchmark]: CACSL2BoogieTranslator took 157.41 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 10:50:33,199 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.59 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 10:50:33,199 INFO L168 Benchmark]: Boogie Preprocessor took 19.65 ms. Allocated memory is still 1.0 GB. Free memory is still 945.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 10:50:33,199 INFO L168 Benchmark]: RCFGBuilder took 221.43 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.7 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -156.3 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. [2018-11-18 10:50:33,200 INFO L168 Benchmark]: TraceAbstraction took 2653.02 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 78.1 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 67.4 MB). Peak memory consumption was 145.6 MB. Max. memory is 11.5 GB. [2018-11-18 10:50:33,200 INFO L168 Benchmark]: Witness Printer took 60.20 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.3 MB). Peak memory consumption was 5.3 MB. Max. memory is 11.5 GB. [2018-11-18 10:50:33,202 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 157.41 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 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 17.59 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.65 ms. Allocated memory is still 1.0 GB. Free memory is still 945.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 221.43 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.7 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -156.3 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2653.02 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 78.1 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 67.4 MB). Peak memory consumption was 145.6 MB. Max. memory is 11.5 GB. * Witness Printer took 60.20 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.3 MB). Peak memory consumption was 5.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 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, 44 locations, 1 error locations. SAFE Result, 2.5s OverallTime, 8 OverallIterations, 11 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 418 SDtfs, 117 SDslu, 1047 SDs, 0 SdLazy, 519 SolverSat, 134 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 577 GetRequests, 490 SyntacticMatches, 10 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 6 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 22 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, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 530 NumberOfCodeBlocks, 530 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 760 ConstructedInterpolants, 0 QuantifiedInterpolants, 81480 SizeOfPredicates, 23 NumberOfNonLiveVariables, 538 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...