./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/loop-invgen/large_const_true-unreach-call_true-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_b1ca09d7-734b-4697-a594-dfa91cc8f6db/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b1ca09d7-734b-4697-a594-dfa91cc8f6db/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b1ca09d7-734b-4697-a594-dfa91cc8f6db/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b1ca09d7-734b-4697-a594-dfa91cc8f6db/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/large_const_true-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_b1ca09d7-734b-4697-a594-dfa91cc8f6db/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b1ca09d7-734b-4697-a594-dfa91cc8f6db/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 b03e1cb325e2c3a8ef30197a8e07012b3a728d97 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 13:19:59,538 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 13:19:59,539 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 13:19:59,546 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 13:19:59,546 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 13:19:59,547 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 13:19:59,548 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 13:19:59,549 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 13:19:59,550 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 13:19:59,550 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 13:19:59,551 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 13:19:59,551 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 13:19:59,552 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 13:19:59,553 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 13:19:59,553 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 13:19:59,554 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 13:19:59,554 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 13:19:59,555 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 13:19:59,557 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 13:19:59,557 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 13:19:59,558 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 13:19:59,559 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 13:19:59,560 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 13:19:59,561 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 13:19:59,561 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 13:19:59,561 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 13:19:59,562 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 13:19:59,562 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 13:19:59,563 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 13:19:59,563 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 13:19:59,564 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 13:19:59,564 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 13:19:59,564 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 13:19:59,564 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 13:19:59,565 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 13:19:59,566 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 13:19:59,566 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_b1ca09d7-734b-4697-a594-dfa91cc8f6db/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 13:19:59,573 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 13:19:59,573 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 13:19:59,574 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 13:19:59,574 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 13:19:59,574 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 13:19:59,574 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 13:19:59,574 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 13:19:59,575 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 13:19:59,575 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 13:19:59,575 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 13:19:59,575 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 13:19:59,575 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 13:19:59,575 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 13:19:59,576 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 13:19:59,576 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 13:19:59,576 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 13:19:59,576 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 13:19:59,576 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 13:19:59,576 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 13:19:59,577 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 13:19:59,577 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 13:19:59,577 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 13:19:59,577 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 13:19:59,577 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 13:19:59,577 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 13:19:59,577 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 13:19:59,578 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 13:19:59,578 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 13:19:59,578 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 13:19:59,578 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 13:19:59,578 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 13:19:59,578 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 13:19:59,578 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 13:19:59,579 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 13:19:59,579 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 13:19:59,579 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 13:19:59,579 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 13:19:59,579 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_b1ca09d7-734b-4697-a594-dfa91cc8f6db/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 -> b03e1cb325e2c3a8ef30197a8e07012b3a728d97 [2018-11-18 13:19:59,606 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 13:19:59,616 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 13:19:59,618 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 13:19:59,619 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 13:19:59,620 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 13:19:59,620 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b1ca09d7-734b-4697-a594-dfa91cc8f6db/bin-2019/utaipan/../../sv-benchmarks/c/loop-invgen/large_const_true-unreach-call_true-termination.i [2018-11-18 13:19:59,664 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b1ca09d7-734b-4697-a594-dfa91cc8f6db/bin-2019/utaipan/data/ec84f97ad/b3fa7eea418f4f57b34e6bf061268de3/FLAG8a51b905b [2018-11-18 13:20:00,060 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 13:20:00,061 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b1ca09d7-734b-4697-a594-dfa91cc8f6db/sv-benchmarks/c/loop-invgen/large_const_true-unreach-call_true-termination.i [2018-11-18 13:20:00,065 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b1ca09d7-734b-4697-a594-dfa91cc8f6db/bin-2019/utaipan/data/ec84f97ad/b3fa7eea418f4f57b34e6bf061268de3/FLAG8a51b905b [2018-11-18 13:20:00,073 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b1ca09d7-734b-4697-a594-dfa91cc8f6db/bin-2019/utaipan/data/ec84f97ad/b3fa7eea418f4f57b34e6bf061268de3 [2018-11-18 13:20:00,075 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 13:20:00,076 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 13:20:00,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 13:20:00,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 13:20:00,080 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 13:20:00,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:20:00" (1/1) ... [2018-11-18 13:20:00,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@88e9939 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:20:00, skipping insertion in model container [2018-11-18 13:20:00,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:20:00" (1/1) ... [2018-11-18 13:20:00,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 13:20:00,103 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 13:20:00,205 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:20:00,208 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 13:20:00,218 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:20:00,226 INFO L195 MainTranslator]: Completed translation [2018-11-18 13:20:00,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:20:00 WrapperNode [2018-11-18 13:20:00,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 13:20:00,226 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 13:20:00,226 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 13:20:00,227 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 13:20:00,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:20:00" (1/1) ... [2018-11-18 13:20:00,235 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:20:00" (1/1) ... [2018-11-18 13:20:00,239 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 13:20:00,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 13:20:00,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 13:20:00,240 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 13:20:00,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:20:00" (1/1) ... [2018-11-18 13:20:00,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:20:00" (1/1) ... [2018-11-18 13:20:00,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:20:00" (1/1) ... [2018-11-18 13:20:00,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:20:00" (1/1) ... [2018-11-18 13:20:00,249 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:20:00" (1/1) ... [2018-11-18 13:20:00,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:20:00" (1/1) ... [2018-11-18 13:20:00,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:20:00" (1/1) ... [2018-11-18 13:20:00,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 13:20:00,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 13:20:00,253 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 13:20:00,254 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 13:20:00,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:20:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1ca09d7-734b-4697-a594-dfa91cc8f6db/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 13:20:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 13:20:00,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 13:20:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 13:20:00,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 13:20:00,342 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 13:20:00,342 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 13:20:00,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-18 13:20:00,342 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-18 13:20:00,471 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 13:20:00,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:20:00 BoogieIcfgContainer [2018-11-18 13:20:00,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 13:20:00,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 13:20:00,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 13:20:00,475 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 13:20:00,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 01:20:00" (1/3) ... [2018-11-18 13:20:00,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@114ec2fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:20:00, skipping insertion in model container [2018-11-18 13:20:00,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:20:00" (2/3) ... [2018-11-18 13:20:00,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@114ec2fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:20:00, skipping insertion in model container [2018-11-18 13:20:00,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:20:00" (3/3) ... [2018-11-18 13:20:00,478 INFO L112 eAbstractionObserver]: Analyzing ICFG large_const_true-unreach-call_true-termination.i [2018-11-18 13:20:00,486 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 13:20:00,492 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 13:20:00,505 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 13:20:00,532 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 13:20:00,532 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 13:20:00,532 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 13:20:00,532 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 13:20:00,533 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 13:20:00,533 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 13:20:00,533 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 13:20:00,533 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 13:20:00,549 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2018-11-18 13:20:00,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 13:20:00,555 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:20:00,555 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:20:00,556 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:20:00,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:20:00,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1169309281, now seen corresponding path program 1 times [2018-11-18 13:20:00,562 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:20:00,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:20:00,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:20:00,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:20:00,600 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:20:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:20:00,642 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 13:20:00,643 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:20:00,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 13:20:00,644 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:20:00,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 13:20:00,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 13:20:00,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 13:20:00,661 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2018-11-18 13:20:00,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:20:00,680 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2018-11-18 13:20:00,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 13:20:00,681 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2018-11-18 13:20:00,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:20:00,688 INFO L225 Difference]: With dead ends: 43 [2018-11-18 13:20:00,689 INFO L226 Difference]: Without dead ends: 22 [2018-11-18 13:20:00,691 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 13:20:00,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-18 13:20:00,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-11-18 13:20:00,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-18 13:20:00,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2018-11-18 13:20:00,716 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2018-11-18 13:20:00,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:20:00,716 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2018-11-18 13:20:00,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 13:20:00,717 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2018-11-18 13:20:00,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-18 13:20:00,717 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:20:00,717 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:20:00,718 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:20:00,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:20:00,718 INFO L82 PathProgramCache]: Analyzing trace with hash -659000362, now seen corresponding path program 1 times [2018-11-18 13:20:00,718 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:20:00,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:20:00,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:20:00,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:20:00,719 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:20:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:20:00,784 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 13:20:00,785 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:20:00,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 13:20:00,785 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:20:00,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 13:20:00,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 13:20:00,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 13:20:00,786 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2018-11-18 13:20:00,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:20:00,834 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2018-11-18 13:20:00,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 13:20:00,834 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-11-18 13:20:00,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:20:00,835 INFO L225 Difference]: With dead ends: 37 [2018-11-18 13:20:00,835 INFO L226 Difference]: Without dead ends: 24 [2018-11-18 13:20:00,836 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-18 13:20:00,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-18 13:20:00,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-18 13:20:00,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 13:20:00,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2018-11-18 13:20:00,840 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2018-11-18 13:20:00,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:20:00,840 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2018-11-18 13:20:00,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 13:20:00,840 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2018-11-18 13:20:00,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 13:20:00,841 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:20:00,841 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:20:00,841 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:20:00,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:20:00,842 INFO L82 PathProgramCache]: Analyzing trace with hash 701537581, now seen corresponding path program 1 times [2018-11-18 13:20:00,842 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:20:00,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:20:00,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:20:00,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:20:00,843 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:20:00,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:20:00,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:20:00,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:20:00,908 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 13:20:00,908 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-11-18 13:20:00,910 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [16], [18], [22], [25], [37], [41], [47], [55], [58], [60], [66], [67], [68], [70] [2018-11-18 13:20:00,933 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 13:20:00,933 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 13:20:01,079 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 13:20:01,080 INFO L272 AbstractInterpreter]: Visited 18 different actions 54 times. Merged at 8 different actions 24 times. Never widened. Performed 222 root evaluator evaluations with a maximum evaluation depth of 4. Performed 222 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 17 variables. [2018-11-18 13:20:01,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:20:01,088 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 13:20:01,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:20:01,088 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1ca09d7-734b-4697-a594-dfa91cc8f6db/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 13:20:01,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:20:01,094 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 13:20:01,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:20:01,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:20:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:20:01,201 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:20:01,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:20:01,262 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 13:20:01,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2018-11-18 13:20:01,262 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 13:20:01,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 13:20:01,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 13:20:01,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2018-11-18 13:20:01,263 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 8 states. [2018-11-18 13:20:01,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:20:01,344 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2018-11-18 13:20:01,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 13:20:01,345 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-11-18 13:20:01,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:20:01,347 INFO L225 Difference]: With dead ends: 47 [2018-11-18 13:20:01,347 INFO L226 Difference]: Without dead ends: 45 [2018-11-18 13:20:01,348 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2018-11-18 13:20:01,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-18 13:20:01,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2018-11-18 13:20:01,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-18 13:20:01,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2018-11-18 13:20:01,356 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 19 [2018-11-18 13:20:01,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:20:01,356 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2018-11-18 13:20:01,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 13:20:01,357 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2018-11-18 13:20:01,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-18 13:20:01,357 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:20:01,357 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 13:20:01,358 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:20:01,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:20:01,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1708424439, now seen corresponding path program 1 times [2018-11-18 13:20:01,358 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:20:01,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:20:01,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:20:01,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:20:01,359 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:20:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:20:01,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:20:01,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:20:01,405 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 13:20:01,405 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 21 with the following transitions: [2018-11-18 13:20:01,405 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [16], [18], [22], [27], [32], [37], [41], [47], [55], [58], [60], [66], [67], [68], [70] [2018-11-18 13:20:01,406 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 13:20:01,406 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 13:20:01,471 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 13:20:01,471 INFO L272 AbstractInterpreter]: Visited 19 different actions 58 times. Merged at 9 different actions 27 times. Never widened. Performed 234 root evaluator evaluations with a maximum evaluation depth of 4. Performed 234 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 17 variables. [2018-11-18 13:20:01,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:20:01,479 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 13:20:01,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:20:01,479 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1ca09d7-734b-4697-a594-dfa91cc8f6db/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 13:20:01,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:20:01,487 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 13:20:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:20:01,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:20:01,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:20:01,540 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:20:01,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:20:01,619 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 13:20:01,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2018-11-18 13:20:01,619 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 13:20:01,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 13:20:01,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 13:20:01,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2018-11-18 13:20:01,620 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 8 states. [2018-11-18 13:20:01,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:20:01,719 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2018-11-18 13:20:01,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 13:20:01,719 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-11-18 13:20:01,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:20:01,721 INFO L225 Difference]: With dead ends: 59 [2018-11-18 13:20:01,721 INFO L226 Difference]: Without dead ends: 57 [2018-11-18 13:20:01,721 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2018-11-18 13:20:01,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-18 13:20:01,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 43. [2018-11-18 13:20:01,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-18 13:20:01,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2018-11-18 13:20:01,728 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 20 [2018-11-18 13:20:01,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:20:01,728 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2018-11-18 13:20:01,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 13:20:01,729 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2018-11-18 13:20:01,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-18 13:20:01,729 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:20:01,729 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 13:20:01,730 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:20:01,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:20:01,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1315397429, now seen corresponding path program 1 times [2018-11-18 13:20:01,730 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:20:01,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:20:01,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:20:01,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:20:01,731 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:20:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:20:01,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:20:01,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:20:01,767 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 13:20:01,768 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 21 with the following transitions: [2018-11-18 13:20:01,768 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [16], [18], [22], [27], [30], [37], [41], [47], [55], [58], [60], [66], [67], [68], [70] [2018-11-18 13:20:01,769 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 13:20:01,769 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 13:20:01,802 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 13:20:01,803 INFO L272 AbstractInterpreter]: Visited 19 different actions 45 times. Merged at 9 different actions 18 times. Never widened. Performed 156 root evaluator evaluations with a maximum evaluation depth of 4. Performed 156 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 17 variables. [2018-11-18 13:20:01,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:20:01,806 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 13:20:01,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:20:01,807 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1ca09d7-734b-4697-a594-dfa91cc8f6db/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 13:20:01,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:20:01,824 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 13:20:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:20:01,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:20:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:20:01,853 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:20:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:20:01,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 13:20:01,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2018-11-18 13:20:01,909 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 13:20:01,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 13:20:01,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 13:20:01,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2018-11-18 13:20:01,910 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 8 states. [2018-11-18 13:20:01,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:20:01,980 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2018-11-18 13:20:01,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 13:20:01,980 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-11-18 13:20:01,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:20:01,981 INFO L225 Difference]: With dead ends: 64 [2018-11-18 13:20:01,981 INFO L226 Difference]: Without dead ends: 62 [2018-11-18 13:20:01,982 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2018-11-18 13:20:01,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-11-18 13:20:01,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2018-11-18 13:20:01,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-18 13:20:01,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2018-11-18 13:20:01,986 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 20 [2018-11-18 13:20:01,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:20:01,986 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2018-11-18 13:20:01,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 13:20:01,987 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2018-11-18 13:20:01,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-18 13:20:01,987 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:20:01,987 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] [2018-11-18 13:20:01,987 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:20:01,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:20:01,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1019570158, now seen corresponding path program 1 times [2018-11-18 13:20:01,988 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:20:01,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:20:01,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:20:01,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:20:01,988 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:20:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:20:02,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:20:02,023 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:20:02,023 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 13:20:02,024 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 25 with the following transitions: [2018-11-18 13:20:02,024 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [16], [18], [22], [25], [27], [32], [37], [41], [47], [55], [58], [60], [66], [67], [68], [70] [2018-11-18 13:20:02,025 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 13:20:02,025 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 13:20:02,072 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 13:20:02,073 INFO L272 AbstractInterpreter]: Visited 20 different actions 62 times. Merged at 10 different actions 27 times. Never widened. Performed 240 root evaluator evaluations with a maximum evaluation depth of 4. Performed 240 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 5 fixpoints after 2 different actions. Largest state had 17 variables. [2018-11-18 13:20:02,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:20:02,075 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 13:20:02,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:20:02,075 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1ca09d7-734b-4697-a594-dfa91cc8f6db/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 13:20:02,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:20:02,081 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 13:20:02,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:20:02,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:20:02,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:20:02,113 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:20:02,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:20:02,135 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:20:02,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2018-11-18 13:20:02,135 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:20:02,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 13:20:02,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 13:20:02,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-11-18 13:20:02,136 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand 5 states. [2018-11-18 13:20:02,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:20:02,145 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2018-11-18 13:20:02,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 13:20:02,146 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2018-11-18 13:20:02,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:20:02,146 INFO L225 Difference]: With dead ends: 73 [2018-11-18 13:20:02,146 INFO L226 Difference]: Without dead ends: 35 [2018-11-18 13:20:02,147 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-11-18 13:20:02,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-11-18 13:20:02,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-11-18 13:20:02,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-18 13:20:02,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-11-18 13:20:02,151 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 24 [2018-11-18 13:20:02,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:20:02,151 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-11-18 13:20:02,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 13:20:02,151 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-11-18 13:20:02,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-18 13:20:02,152 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:20:02,152 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:20:02,153 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:20:02,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:20:02,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1155724272, now seen corresponding path program 1 times [2018-11-18 13:20:02,153 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:20:02,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:20:02,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:20:02,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:20:02,154 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:20:02,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:20:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:20:02,194 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:20:02,195 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 13:20:02,195 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:20:02,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 13:20:02,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 13:20:02,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-18 13:20:02,196 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 5 states. [2018-11-18 13:20:02,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:20:02,244 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-11-18 13:20:02,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 13:20:02,244 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-11-18 13:20:02,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:20:02,244 INFO L225 Difference]: With dead ends: 34 [2018-11-18 13:20:02,244 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 13:20:02,245 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-11-18 13:20:02,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 13:20:02,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 13:20:02,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 13:20:02,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 13:20:02,245 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2018-11-18 13:20:02,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:20:02,246 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 13:20:02,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 13:20:02,246 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 13:20:02,246 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 13:20:02,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 13:20:02,440 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 13:20:02,440 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 13:20:02,440 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 13:20:02,441 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 13:20:02,441 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 13:20:02,441 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 13:20:02,441 INFO L421 ceAbstractionStarter]: At program point L33(line 33) the Hoare annotation is: (and (<= 10000 main_~c3~0) (<= 2000 main_~c2~0) (<= 4000 main_~c1~0) (<= 1 main_~i~0) (<= main_~n~0 1) (<= 2000 main_~k~0) (<= main_~n~0 (+ main_~j~0 1))) [2018-11-18 13:20:02,441 INFO L425 ceAbstractionStarter]: For program point L33-1(line 33) no Hoare annotation was computed. [2018-11-18 13:20:02,441 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 38) no Hoare annotation was computed. [2018-11-18 13:20:02,441 INFO L425 ceAbstractionStarter]: For program point L23(line 23) no Hoare annotation was computed. [2018-11-18 13:20:02,441 INFO L425 ceAbstractionStarter]: For program point L17(line 17) no Hoare annotation was computed. [2018-11-18 13:20:02,441 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 38) no Hoare annotation was computed. [2018-11-18 13:20:02,441 INFO L425 ceAbstractionStarter]: For program point L32-1(lines 32 36) no Hoare annotation was computed. [2018-11-18 13:20:02,441 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 38) the Hoare annotation is: true [2018-11-18 13:20:02,442 INFO L421 ceAbstractionStarter]: At program point L32-3(lines 32 36) the Hoare annotation is: (let ((.cse0 (<= main_~n~0 main_~j~0)) (.cse4 (<= 1 main_~i~0)) (.cse5 (<= main_~n~0 1)) (.cse1 (<= 10000 main_~c3~0)) (.cse2 (<= 2000 main_~c2~0)) (.cse3 (<= 4000 main_~c1~0))) (or (and (<= main_~n~0 0) (<= main_~i~0 0) .cse0) (and .cse1 .cse2 .cse3 .cse4 .cse5 .cse0) (and .cse4 .cse5 (and .cse1 .cse2 .cse3 (<= 2000 main_~k~0)) (<= main_~n~0 (+ main_~j~0 1))))) [2018-11-18 13:20:02,442 INFO L425 ceAbstractionStarter]: For program point L32-4(lines 32 36) no Hoare annotation was computed. [2018-11-18 13:20:02,442 INFO L425 ceAbstractionStarter]: For program point L26(lines 26 29) no Hoare annotation was computed. [2018-11-18 13:20:02,442 INFO L425 ceAbstractionStarter]: For program point L24(lines 24 29) no Hoare annotation was computed. [2018-11-18 13:20:02,442 INFO L421 ceAbstractionStarter]: At program point L26-2(lines 20 30) the Hoare annotation is: (let ((.cse0 (<= 10000 main_~c3~0)) (.cse1 (<= 2000 main_~c2~0)) (.cse2 (<= 4000 main_~c1~0))) (or (and (and .cse0 .cse1 .cse2 (<= 1 main_~i~0) (<= 2000 main_~k~0)) (<= main_~n~0 1)) (and .cse0 .cse1 .cse2 (<= 0 main_~i~0) (<= 0 main_~k~0) (<= main_~i~0 0)))) [2018-11-18 13:20:02,442 INFO L425 ceAbstractionStarter]: For program point L20-1(lines 20 30) no Hoare annotation was computed. [2018-11-18 13:20:02,442 INFO L425 ceAbstractionStarter]: For program point L20-3(lines 20 30) no Hoare annotation was computed. [2018-11-18 13:20:02,442 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-11-18 13:20:02,443 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-11-18 13:20:02,443 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-11-18 13:20:02,443 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-18 13:20:02,443 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-11-18 13:20:02,443 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-11-18 13:20:02,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 01:20:02 BoogieIcfgContainer [2018-11-18 13:20:02,453 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 13:20:02,453 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 13:20:02,453 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 13:20:02,453 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 13:20:02,454 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:20:00" (3/4) ... [2018-11-18 13:20:02,456 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 13:20:02,459 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 13:20:02,460 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 13:20:02,460 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-18 13:20:02,462 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2018-11-18 13:20:02,462 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-18 13:20:02,463 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 13:20:02,494 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_b1ca09d7-734b-4697-a594-dfa91cc8f6db/bin-2019/utaipan/witness.graphml [2018-11-18 13:20:02,495 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 13:20:02,495 INFO L168 Benchmark]: Toolchain (without parser) took 2419.78 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 959.1 MB in the beginning and 1.1 GB in the end (delta: -162.6 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 13:20:02,496 INFO L168 Benchmark]: CDTParser took 0.16 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 13:20:02,497 INFO L168 Benchmark]: CACSL2BoogieTranslator took 149.20 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 947.3 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-11-18 13:20:02,497 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.91 ms. Allocated memory is still 1.0 GB. Free memory was 947.3 MB in the beginning and 944.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 13:20:02,497 INFO L168 Benchmark]: Boogie Preprocessor took 13.63 ms. Allocated memory is still 1.0 GB. Free memory is still 944.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 13:20:02,497 INFO L168 Benchmark]: RCFGBuilder took 217.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 944.6 MB in the beginning and 1.1 GB in the end (delta: -192.2 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-18 13:20:02,498 INFO L168 Benchmark]: TraceAbstraction took 1981.13 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 9.9 MB). Peak memory consumption was 254.2 MB. Max. memory is 11.5 GB. [2018-11-18 13:20:02,498 INFO L168 Benchmark]: Witness Printer took 41.64 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 11.5 GB. [2018-11-18 13:20:02,500 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 149.20 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 947.3 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.91 ms. Allocated memory is still 1.0 GB. Free memory was 947.3 MB in the beginning and 944.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.63 ms. Allocated memory is still 1.0 GB. Free memory is still 944.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 217.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 944.6 MB in the beginning and 1.1 GB in the end (delta: -192.2 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1981.13 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 9.9 MB). Peak memory consumption was 254.2 MB. Max. memory is 11.5 GB. * Witness Printer took 41.64 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.1 MB). Peak memory consumption was 5.1 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: 32]: Loop Invariant Derived loop invariant: (((n <= 0 && i <= 0) && n <= j) || (((((10000 <= c3 && 2000 <= c2) && 4000 <= c1) && 1 <= i) && n <= 1) && n <= j)) || (((1 <= i && n <= 1) && ((10000 <= c3 && 2000 <= c2) && 4000 <= c1) && 2000 <= k) && n <= j + 1) - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (((((10000 <= c3 && 2000 <= c2) && 4000 <= c1) && 1 <= i) && 2000 <= k) && n <= 1) || (((((10000 <= c3 && 2000 <= c2) && 4000 <= c1) && 0 <= i) && 0 <= k) && i <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. SAFE Result, 1.9s OverallTime, 7 OverallIterations, 3 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 190 SDtfs, 135 SDslu, 439 SDs, 0 SdLazy, 222 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 210 GetRequests, 152 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 4 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 40 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 13 PreInvPairs, 19 NumberOfFragments, 125 HoareAnnotationTreeSize, 13 FomulaSimplifications, 127 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 103 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 222 NumberOfCodeBlocks, 222 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 290 ConstructedInterpolants, 0 QuantifiedInterpolants, 14542 SizeOfPredicates, 11 NumberOfNonLiveVariables, 279 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 15 InterpolantComputations, 4 PerfectInterpolantSequences, 27/49 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...