./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/loop-lit/ddlm2013_true-unreach-call.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_9e9e97d7-5b84-4d96-aea1-84a7ee3aca4b/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_9e9e97d7-5b84-4d96-aea1-84a7ee3aca4b/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_9e9e97d7-5b84-4d96-aea1-84a7ee3aca4b/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_9e9e97d7-5b84-4d96-aea1-84a7ee3aca4b/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-lit/ddlm2013_true-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_9e9e97d7-5b84-4d96-aea1-84a7ee3aca4b/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_9e9e97d7-5b84-4d96-aea1-84a7ee3aca4b/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 17744505b3a424a40a1b2449004fea58677c1b94 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 11:28:29,599 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 11:28:29,600 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 11:28:29,612 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 11:28:29,612 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 11:28:29,613 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 11:28:29,614 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 11:28:29,615 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 11:28:29,616 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 11:28:29,617 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 11:28:29,617 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 11:28:29,618 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 11:28:29,618 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 11:28:29,619 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 11:28:29,619 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 11:28:29,620 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 11:28:29,620 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 11:28:29,622 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 11:28:29,623 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 11:28:29,624 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 11:28:29,625 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 11:28:29,626 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 11:28:29,628 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 11:28:29,628 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 11:28:29,628 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 11:28:29,629 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 11:28:29,630 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 11:28:29,630 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 11:28:29,631 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 11:28:29,632 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 11:28:29,632 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 11:28:29,632 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 11:28:29,632 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 11:28:29,633 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 11:28:29,633 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 11:28:29,634 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 11:28:29,635 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_9e9e97d7-5b84-4d96-aea1-84a7ee3aca4b/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 11:28:29,644 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 11:28:29,644 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 11:28:29,645 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 11:28:29,645 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 11:28:29,645 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 11:28:29,646 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 11:28:29,646 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 11:28:29,646 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 11:28:29,646 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 11:28:29,646 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 11:28:29,646 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 11:28:29,647 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 11:28:29,647 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 11:28:29,647 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 11:28:29,647 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 11:28:29,647 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 11:28:29,649 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 11:28:29,649 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 11:28:29,649 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 11:28:29,649 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 11:28:29,649 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 11:28:29,649 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 11:28:29,649 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 11:28:29,650 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 11:28:29,650 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 11:28:29,650 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 11:28:29,650 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 11:28:29,650 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 11:28:29,650 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 11:28:29,650 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 11:28:29,651 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 11:28:29,651 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 11:28:29,651 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 11:28:29,651 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 11:28:29,651 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 11:28:29,651 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 11:28:29,651 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 11:28:29,652 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_9e9e97d7-5b84-4d96-aea1-84a7ee3aca4b/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 -> 17744505b3a424a40a1b2449004fea58677c1b94 [2018-11-18 11:28:29,675 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 11:28:29,684 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 11:28:29,687 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 11:28:29,688 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 11:28:29,688 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 11:28:29,688 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_9e9e97d7-5b84-4d96-aea1-84a7ee3aca4b/bin-2019/utaipan/../../sv-benchmarks/c/loop-lit/ddlm2013_true-unreach-call.i [2018-11-18 11:28:29,749 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9e9e97d7-5b84-4d96-aea1-84a7ee3aca4b/bin-2019/utaipan/data/9b98484c6/036bb73a5d224786924b9e02ddb67722/FLAG762eef028 [2018-11-18 11:28:30,103 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 11:28:30,103 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_9e9e97d7-5b84-4d96-aea1-84a7ee3aca4b/sv-benchmarks/c/loop-lit/ddlm2013_true-unreach-call.i [2018-11-18 11:28:30,108 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9e9e97d7-5b84-4d96-aea1-84a7ee3aca4b/bin-2019/utaipan/data/9b98484c6/036bb73a5d224786924b9e02ddb67722/FLAG762eef028 [2018-11-18 11:28:30,116 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_9e9e97d7-5b84-4d96-aea1-84a7ee3aca4b/bin-2019/utaipan/data/9b98484c6/036bb73a5d224786924b9e02ddb67722 [2018-11-18 11:28:30,119 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 11:28:30,120 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 11:28:30,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 11:28:30,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 11:28:30,123 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 11:28:30,124 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 11:28:30" (1/1) ... [2018-11-18 11:28:30,126 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4546e68c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:28:30, skipping insertion in model container [2018-11-18 11:28:30,126 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 11:28:30" (1/1) ... [2018-11-18 11:28:30,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 11:28:30,145 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 11:28:30,262 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 11:28:30,265 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 11:28:30,276 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 11:28:30,287 INFO L195 MainTranslator]: Completed translation [2018-11-18 11:28:30,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:28:30 WrapperNode [2018-11-18 11:28:30,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 11:28:30,288 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 11:28:30,288 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 11:28:30,288 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 11:28:30,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:28:30" (1/1) ... [2018-11-18 11:28:30,297 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:28:30" (1/1) ... [2018-11-18 11:28:30,301 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 11:28:30,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 11:28:30,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 11:28:30,302 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 11:28:30,310 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:28:30" (1/1) ... [2018-11-18 11:28:30,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:28:30" (1/1) ... [2018-11-18 11:28:30,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:28:30" (1/1) ... [2018-11-18 11:28:30,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:28:30" (1/1) ... [2018-11-18 11:28:30,313 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:28:30" (1/1) ... [2018-11-18 11:28:30,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:28:30" (1/1) ... [2018-11-18 11:28:30,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:28:30" (1/1) ... [2018-11-18 11:28:30,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 11:28:30,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 11:28:30,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 11:28:30,319 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 11:28:30,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:28:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e9e97d7-5b84-4d96-aea1-84a7ee3aca4b/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 11:28:30,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 11:28:30,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 11:28:30,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 11:28:30,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 11:28:30,404 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 11:28:30,404 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 11:28:30,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-18 11:28:30,404 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-18 11:28:30,525 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 11:28:30,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:28:30 BoogieIcfgContainer [2018-11-18 11:28:30,525 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 11:28:30,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 11:28:30,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 11:28:30,527 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 11:28:30,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 11:28:30" (1/3) ... [2018-11-18 11:28:30,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b8bf3a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 11:28:30, skipping insertion in model container [2018-11-18 11:28:30,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:28:30" (2/3) ... [2018-11-18 11:28:30,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b8bf3a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 11:28:30, skipping insertion in model container [2018-11-18 11:28:30,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:28:30" (3/3) ... [2018-11-18 11:28:30,530 INFO L112 eAbstractionObserver]: Analyzing ICFG ddlm2013_true-unreach-call.i [2018-11-18 11:28:30,535 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 11:28:30,541 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 11:28:30,554 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 11:28:30,578 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 11:28:30,579 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 11:28:30,579 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 11:28:30,579 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 11:28:30,579 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 11:28:30,579 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 11:28:30,579 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 11:28:30,579 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 11:28:30,592 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2018-11-18 11:28:30,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-18 11:28:30,597 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:28:30,597 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:28:30,598 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:28:30,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:28:30,602 INFO L82 PathProgramCache]: Analyzing trace with hash 2066841578, now seen corresponding path program 1 times [2018-11-18 11:28:30,603 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:28:30,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:28:30,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:28:30,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:28:30,641 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:28:30,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:28:30,690 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 11:28:30,691 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 11:28:30,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 11:28:30,691 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 11:28:30,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 11:28:30,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 11:28:30,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 11:28:30,703 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2018-11-18 11:28:30,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:28:30,718 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2018-11-18 11:28:30,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 11:28:30,719 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-11-18 11:28:30,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:28:30,727 INFO L225 Difference]: With dead ends: 36 [2018-11-18 11:28:30,727 INFO L226 Difference]: Without dead ends: 16 [2018-11-18 11:28:30,731 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 11:28:30,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-11-18 11:28:30,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-11-18 11:28:30,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-18 11:28:30,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-11-18 11:28:30,761 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2018-11-18 11:28:30,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:28:30,762 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-11-18 11:28:30,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 11:28:30,762 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-11-18 11:28:30,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 11:28:30,762 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:28:30,762 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:28:30,763 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:28:30,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:28:30,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1651906282, now seen corresponding path program 1 times [2018-11-18 11:28:30,763 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:28:30,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:28:30,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:28:30,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:28:30,764 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:28:30,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:28:30,995 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 11:28:30,996 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 11:28:30,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 11:28:30,996 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 11:28:30,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 11:28:30,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 11:28:30,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 11:28:30,998 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2018-11-18 11:28:31,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:28:31,031 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2018-11-18 11:28:31,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 11:28:31,033 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-18 11:28:31,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:28:31,033 INFO L225 Difference]: With dead ends: 25 [2018-11-18 11:28:31,033 INFO L226 Difference]: Without dead ends: 19 [2018-11-18 11:28:31,034 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 11:28:31,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-11-18 11:28:31,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-11-18 11:28:31,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-18 11:28:31,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-11-18 11:28:31,038 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2018-11-18 11:28:31,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:28:31,038 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-11-18 11:28:31,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 11:28:31,038 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-11-18 11:28:31,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-18 11:28:31,039 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:28:31,039 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:28:31,039 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:28:31,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:28:31,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1973708347, now seen corresponding path program 1 times [2018-11-18 11:28:31,039 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:28:31,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:28:31,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:28:31,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:28:31,041 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:28:31,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:28:31,319 WARN L180 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 5 [2018-11-18 11:28:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:28:31,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:28:31,332 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:28:31,333 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 19 with the following transitions: [2018-11-18 11:28:31,334 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [13], [15], [18], [20], [23], [32], [39], [42], [44], [50], [51], [52], [54] [2018-11-18 11:28:31,356 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 11:28:31,356 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 11:28:31,544 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 11:28:31,546 INFO L272 AbstractInterpreter]: Visited 16 different actions 44 times. Merged at 6 different actions 18 times. Never widened. Performed 162 root evaluator evaluations with a maximum evaluation depth of 9. Performed 162 inverse root evaluator evaluations with a maximum inverse evaluation depth of 9. Found 1 fixpoints after 1 different actions. Largest state had 8 variables. [2018-11-18 11:28:31,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:28:31,596 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 11:28:31,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:28:31,597 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e9e97d7-5b84-4d96-aea1-84a7ee3aca4b/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 11:28:31,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:28:31,604 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 11:28:31,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:28:31,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:28:31,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:28:31,784 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:28:31,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:28:31,903 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 11:28:31,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2018-11-18 11:28:31,903 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 11:28:31,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 11:28:31,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 11:28:31,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2018-11-18 11:28:31,904 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 12 states. [2018-11-18 11:28:31,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:28:31,954 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2018-11-18 11:28:31,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 11:28:31,955 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2018-11-18 11:28:31,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:28:31,955 INFO L225 Difference]: With dead ends: 32 [2018-11-18 11:28:31,956 INFO L226 Difference]: Without dead ends: 26 [2018-11-18 11:28:31,956 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-11-18 11:28:31,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-18 11:28:31,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2018-11-18 11:28:31,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-18 11:28:31,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2018-11-18 11:28:31,960 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2018-11-18 11:28:31,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:28:31,961 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2018-11-18 11:28:31,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 11:28:31,961 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2018-11-18 11:28:31,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-18 11:28:31,962 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:28:31,962 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:28:31,962 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:28:31,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:28:31,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1386902333, now seen corresponding path program 1 times [2018-11-18 11:28:31,963 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:28:31,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:28:31,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:28:31,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:28:31,964 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:28:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:28:31,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 11:28:31,996 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 11:28:31,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 11:28:31,997 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 11:28:31,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 11:28:31,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 11:28:31,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 11:28:31,997 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 3 states. [2018-11-18 11:28:32,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:28:32,031 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2018-11-18 11:28:32,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 11:28:32,032 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2018-11-18 11:28:32,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:28:32,032 INFO L225 Difference]: With dead ends: 36 [2018-11-18 11:28:32,032 INFO L226 Difference]: Without dead ends: 23 [2018-11-18 11:28:32,032 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 11:28:32,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-18 11:28:32,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-18 11:28:32,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-18 11:28:32,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-11-18 11:28:32,036 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2018-11-18 11:28:32,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:28:32,036 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-11-18 11:28:32,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 11:28:32,036 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-11-18 11:28:32,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-18 11:28:32,037 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:28:32,037 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:28:32,037 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:28:32,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:28:32,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1807628064, now seen corresponding path program 2 times [2018-11-18 11:28:32,037 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:28:32,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:28:32,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:28:32,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:28:32,040 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:28:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:28:32,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:28:32,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:28:32,289 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:28:32,289 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 11:28:32,289 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 11:28:32,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:28:32,290 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e9e97d7-5b84-4d96-aea1-84a7ee3aca4b/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 11:28:32,297 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 11:28:32,297 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 11:28:32,311 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 11:28:32,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 11:28:32,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:28:32,452 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:28:32,452 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:28:33,314 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:28:33,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 11:28:33,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2018-11-18 11:28:33,335 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 11:28:33,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-18 11:28:33,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-18 11:28:33,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2018-11-18 11:28:33,336 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 16 states. [2018-11-18 11:28:33,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:28:33,495 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2018-11-18 11:28:33,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-18 11:28:33,496 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2018-11-18 11:28:33,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:28:33,496 INFO L225 Difference]: With dead ends: 60 [2018-11-18 11:28:33,497 INFO L226 Difference]: Without dead ends: 37 [2018-11-18 11:28:33,497 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2018-11-18 11:28:33,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-18 11:28:33,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2018-11-18 11:28:33,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-18 11:28:33,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2018-11-18 11:28:33,501 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2018-11-18 11:28:33,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:28:33,501 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2018-11-18 11:28:33,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-18 11:28:33,501 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2018-11-18 11:28:33,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-18 11:28:33,502 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:28:33,502 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:28:33,502 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:28:33,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:28:33,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1736007175, now seen corresponding path program 1 times [2018-11-18 11:28:33,503 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:28:33,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:28:33,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 11:28:33,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:28:33,503 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:28:33,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:28:35,686 WARN L180 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 43 DAG size of output: 15 [2018-11-18 11:28:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 11:28:35,697 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:28:35,697 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:28:35,697 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-11-18 11:28:35,697 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [13], [15], [18], [20], [23], [25], [32], [39], [42], [44], [50], [51], [52], [54] [2018-11-18 11:28:35,699 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 11:28:35,699 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 11:28:35,812 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 11:28:35,812 INFO L272 AbstractInterpreter]: Visited 17 different actions 57 times. Merged at 6 different actions 23 times. Never widened. Performed 208 root evaluator evaluations with a maximum evaluation depth of 9. Performed 208 inverse root evaluator evaluations with a maximum inverse evaluation depth of 9. Found 1 fixpoints after 1 different actions. Largest state had 9 variables. [2018-11-18 11:28:35,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:28:35,858 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 11:28:35,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:28:35,858 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e9e97d7-5b84-4d96-aea1-84a7ee3aca4b/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 11:28:35,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:28:35,869 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 11:28:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:28:35,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:28:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 11:28:35,931 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:28:36,051 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 11:28:36,075 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-18 11:28:36,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 7 [2018-11-18 11:28:36,075 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 11:28:36,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 11:28:36,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 11:28:36,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-18 11:28:36,076 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 3 states. [2018-11-18 11:28:36,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:28:36,081 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-11-18 11:28:36,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 11:28:36,081 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2018-11-18 11:28:36,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:28:36,081 INFO L225 Difference]: With dead ends: 27 [2018-11-18 11:28:36,081 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 11:28:36,082 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-18 11:28:36,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 11:28:36,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 11:28:36,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 11:28:36,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 11:28:36,082 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2018-11-18 11:28:36,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:28:36,082 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 11:28:36,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 11:28:36,082 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 11:28:36,082 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 11:28:36,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 11:28:36,132 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 11:28:36,132 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 11:28:36,132 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 11:28:36,132 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 11:28:36,132 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 11:28:36,132 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 11:28:36,133 INFO L425 ceAbstractionStarter]: For program point L31(lines 31 33) no Hoare annotation was computed. [2018-11-18 11:28:36,133 INFO L425 ceAbstractionStarter]: For program point L25(lines 25 29) no Hoare annotation was computed. [2018-11-18 11:28:36,133 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 35) no Hoare annotation was computed. [2018-11-18 11:28:36,133 INFO L425 ceAbstractionStarter]: For program point L25-2(lines 10 35) no Hoare annotation was computed. [2018-11-18 11:28:36,133 INFO L425 ceAbstractionStarter]: For program point L21(lines 21 30) no Hoare annotation was computed. [2018-11-18 11:28:36,133 INFO L425 ceAbstractionStarter]: For program point L21-1(lines 21 30) no Hoare annotation was computed. [2018-11-18 11:28:36,133 INFO L425 ceAbstractionStarter]: For program point L21-3(lines 10 35) no Hoare annotation was computed. [2018-11-18 11:28:36,133 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 35) no Hoare annotation was computed. [2018-11-18 11:28:36,134 INFO L421 ceAbstractionStarter]: At program point L32(line 32) the Hoare annotation is: (and (<= main_~a~0 main_~b~0) (<= main_~b~0 main_~a~0)) [2018-11-18 11:28:36,134 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 35) the Hoare annotation is: true [2018-11-18 11:28:36,134 INFO L425 ceAbstractionStarter]: For program point L16(lines 16 20) no Hoare annotation was computed. [2018-11-18 11:28:36,134 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-11-18 11:28:36,134 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-11-18 11:28:36,134 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-18 11:28:36,134 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-11-18 11:28:36,134 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-11-18 11:28:36,134 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-11-18 11:28:36,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 11:28:36 BoogieIcfgContainer [2018-11-18 11:28:36,136 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 11:28:36,137 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 11:28:36,137 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 11:28:36,137 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 11:28:36,137 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:28:30" (3/4) ... [2018-11-18 11:28:36,140 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 11:28:36,145 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 11:28:36,145 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 11:28:36,146 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-18 11:28:36,149 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2018-11-18 11:28:36,149 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-11-18 11:28:36,149 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 11:28:36,149 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 11:28:36,179 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_9e9e97d7-5b84-4d96-aea1-84a7ee3aca4b/bin-2019/utaipan/witness.graphml [2018-11-18 11:28:36,179 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 11:28:36,180 INFO L168 Benchmark]: Toolchain (without parser) took 6060.37 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 172.0 MB). Free memory was 960.7 MB in the beginning and 882.6 MB in the end (delta: 78.1 MB). Peak memory consumption was 250.1 MB. Max. memory is 11.5 GB. [2018-11-18 11:28:36,181 INFO L168 Benchmark]: CDTParser took 0.15 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 11:28:36,181 INFO L168 Benchmark]: CACSL2BoogieTranslator took 166.45 ms. Allocated memory is still 1.0 GB. Free memory was 960.7 MB in the beginning and 950.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:28:36,181 INFO L168 Benchmark]: Boogie Procedure Inliner took 14.04 ms. Allocated memory is still 1.0 GB. Free memory is still 950.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 11:28:36,181 INFO L168 Benchmark]: Boogie Preprocessor took 17.20 ms. Allocated memory is still 1.0 GB. Free memory was 950.0 MB in the beginning and 947.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:28:36,182 INFO L168 Benchmark]: RCFGBuilder took 205.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 172.0 MB). Free memory was 947.3 MB in the beginning and 1.2 GB in the end (delta: -208.6 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-18 11:28:36,182 INFO L168 Benchmark]: TraceAbstraction took 5610.92 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 885.9 MB in the end (delta: 270.0 MB). Peak memory consumption was 270.0 MB. Max. memory is 11.5 GB. [2018-11-18 11:28:36,182 INFO L168 Benchmark]: Witness Printer took 42.48 ms. Allocated memory is still 1.2 GB. Free memory was 885.9 MB in the beginning and 882.6 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. [2018-11-18 11:28:36,184 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 166.45 ms. Allocated memory is still 1.0 GB. Free memory was 960.7 MB in the beginning and 950.0 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 14.04 ms. Allocated memory is still 1.0 GB. Free memory is still 950.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.20 ms. Allocated memory is still 1.0 GB. Free memory was 950.0 MB in the beginning and 947.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 205.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 172.0 MB). Free memory was 947.3 MB in the beginning and 1.2 GB in the end (delta: -208.6 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5610.92 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 885.9 MB in the end (delta: 270.0 MB). Peak memory consumption was 270.0 MB. Max. memory is 11.5 GB. * Witness Printer took 42.48 ms. Allocated memory is still 1.2 GB. Free memory was 885.9 MB in the beginning and 882.6 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. SAFE Result, 5.5s OverallTime, 6 OverallIterations, 4 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 108 SDtfs, 30 SDslu, 259 SDs, 0 SdLazy, 114 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 168 GetRequests, 116 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.4s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 13 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 15 PreInvPairs, 20 NumberOfFragments, 12 HoareAnnotationTreeSize, 15 FomulaSimplifications, 46 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 15 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.3s InterpolantComputationTime, 176 NumberOfCodeBlocks, 176 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 230 ConstructedInterpolants, 0 QuantifiedInterpolants, 23539 SizeOfPredicates, 7 NumberOfNonLiveVariables, 197 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 58/105 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...