./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/id_b2_o3_true-unreach-call_true-termination_true-no-overflow.c --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_ee00745d-f8df-460d-966f-a4b337226fbe/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_ee00745d-f8df-460d-966f-a4b337226fbe/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_ee00745d-f8df-460d-966f-a4b337226fbe/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_ee00745d-f8df-460d-966f-a4b337226fbe/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_b2_o3_true-unreach-call_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_ee00745d-f8df-460d-966f-a4b337226fbe/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_ee00745d-f8df-460d-966f-a4b337226fbe/bin-2019/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 128b2219e8f86913777da69c49be5957c6dd8c80 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 10:09:25,723 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 10:09:25,724 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 10:09:25,732 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 10:09:25,733 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 10:09:25,733 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 10:09:25,734 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 10:09:25,735 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 10:09:25,736 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 10:09:25,737 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 10:09:25,738 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 10:09:25,738 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 10:09:25,739 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 10:09:25,739 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 10:09:25,740 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 10:09:25,740 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 10:09:25,741 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 10:09:25,742 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 10:09:25,743 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 10:09:25,744 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 10:09:25,745 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 10:09:25,746 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 10:09:25,748 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 10:09:25,748 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 10:09:25,748 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 10:09:25,748 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 10:09:25,749 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 10:09:25,750 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 10:09:25,750 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 10:09:25,751 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 10:09:25,751 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 10:09:25,752 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 10:09:25,752 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 10:09:25,752 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 10:09:25,753 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 10:09:25,753 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 10:09:25,753 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_ee00745d-f8df-460d-966f-a4b337226fbe/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf [2018-11-18 10:09:25,763 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 10:09:25,763 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 10:09:25,764 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 10:09:25,764 INFO L133 SettingsManager]: * Process only entry and re-entry procedures=false [2018-11-18 10:09:25,764 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 10:09:25,765 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 10:09:25,765 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 10:09:25,765 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 10:09:25,765 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 10:09:25,765 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 10:09:25,765 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 10:09:25,766 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 10:09:25,766 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 10:09:25,766 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 10:09:25,766 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 10:09:25,766 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 10:09:25,766 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 10:09:25,766 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 10:09:25,767 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 10:09:25,767 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 10:09:25,767 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 10:09:25,767 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 10:09:25,767 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 10:09:25,767 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 10:09:25,768 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 10:09:25,768 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 10:09:25,768 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 10:09:25,768 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 10:09:25,768 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 10:09:25,768 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 10:09:25,768 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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_ee00745d-f8df-460d-966f-a4b337226fbe/bin-2019/uautomizer 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 -> Automizer 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 -> 128b2219e8f86913777da69c49be5957c6dd8c80 [2018-11-18 10:09:25,791 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 10:09:25,800 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 10:09:25,803 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 10:09:25,804 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 10:09:25,804 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 10:09:25,805 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_ee00745d-f8df-460d-966f-a4b337226fbe/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/id_b2_o3_true-unreach-call_true-termination_true-no-overflow.c [2018-11-18 10:09:25,840 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_ee00745d-f8df-460d-966f-a4b337226fbe/bin-2019/uautomizer/data/769dd8638/f747f796c0e545459dfa97e2a85a5f64/FLAGe996e0e93 [2018-11-18 10:09:26,229 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 10:09:26,230 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_ee00745d-f8df-460d-966f-a4b337226fbe/sv-benchmarks/c/recursive-simple/id_b2_o3_true-unreach-call_true-termination_true-no-overflow.c [2018-11-18 10:09:26,234 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_ee00745d-f8df-460d-966f-a4b337226fbe/bin-2019/uautomizer/data/769dd8638/f747f796c0e545459dfa97e2a85a5f64/FLAGe996e0e93 [2018-11-18 10:09:26,243 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_ee00745d-f8df-460d-966f-a4b337226fbe/bin-2019/uautomizer/data/769dd8638/f747f796c0e545459dfa97e2a85a5f64 [2018-11-18 10:09:26,246 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 10:09:26,247 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 10:09:26,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 10:09:26,247 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 10:09:26,249 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 10:09:26,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 10:09:26" (1/1) ... [2018-11-18 10:09:26,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17a96ca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:09:26, skipping insertion in model container [2018-11-18 10:09:26,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 10:09:26" (1/1) ... [2018-11-18 10:09:26,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 10:09:26,267 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 10:09:26,367 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 10:09:26,369 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 10:09:26,377 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 10:09:26,385 INFO L195 MainTranslator]: Completed translation [2018-11-18 10:09:26,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:09:26 WrapperNode [2018-11-18 10:09:26,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 10:09:26,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 10:09:26,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 10:09:26,386 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 10:09:26,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:09:26" (1/1) ... [2018-11-18 10:09:26,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:09:26" (1/1) ... [2018-11-18 10:09:26,398 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:09:26" (1/1) ... [2018-11-18 10:09:26,398 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:09:26" (1/1) ... [2018-11-18 10:09:26,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:09:26" (1/1) ... [2018-11-18 10:09:26,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:09:26" (1/1) ... [2018-11-18 10:09:26,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:09:26" (1/1) ... [2018-11-18 10:09:26,403 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 10:09:26,403 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 10:09:26,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 10:09:26,403 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 10:09:26,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:09:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ee00745d-f8df-460d-966f-a4b337226fbe/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 10:09:26,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 10:09:26,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 10:09:26,475 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-11-18 10:09:26,475 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 10:09:26,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2018-11-18 10:09:26,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 10:09:26,476 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-11-18 10:09:26,476 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 10:09:26,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 10:09:26,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 10:09:26,577 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 10:09:26,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:09:26 BoogieIcfgContainer [2018-11-18 10:09:26,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 10:09:26,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 10:09:26,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 10:09:26,580 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 10:09:26,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 10:09:26" (1/3) ... [2018-11-18 10:09:26,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2554a7bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 10:09:26, skipping insertion in model container [2018-11-18 10:09:26,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:09:26" (2/3) ... [2018-11-18 10:09:26,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2554a7bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 10:09:26, skipping insertion in model container [2018-11-18 10:09:26,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:09:26" (3/3) ... [2018-11-18 10:09:26,582 INFO L112 eAbstractionObserver]: Analyzing ICFG id_b2_o3_true-unreach-call_true-termination_true-no-overflow.c [2018-11-18 10:09:26,588 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 10:09:26,593 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 10:09:26,606 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 10:09:26,625 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 10:09:26,626 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 10:09:26,626 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 10:09:26,626 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 10:09:26,626 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 10:09:26,626 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 10:09:26,626 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 10:09:26,626 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 10:09:26,626 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 10:09:26,641 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-11-18 10:09:26,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 10:09:26,645 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:09:26,646 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:09:26,648 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:09:26,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:09:26,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1250208381, now seen corresponding path program 1 times [2018-11-18 10:09:26,654 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:09:26,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:09:26,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:09:26,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:09:26,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:09:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:09:26,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:09:26,836 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:09:26,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 10:09:26,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 10:09:26,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 10:09:26,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:09:26,852 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2018-11-18 10:09:26,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:09:26,878 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2018-11-18 10:09:26,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 10:09:26,879 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-18 10:09:26,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:09:26,890 INFO L225 Difference]: With dead ends: 33 [2018-11-18 10:09:26,890 INFO L226 Difference]: Without dead ends: 19 [2018-11-18 10:09:26,893 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:09:26,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-11-18 10:09:26,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-11-18 10:09:26,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-18 10:09:26,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-11-18 10:09:26,922 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2018-11-18 10:09:26,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:09:26,922 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-11-18 10:09:26,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 10:09:26,923 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-11-18 10:09:26,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-18 10:09:26,923 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:09:26,924 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:09:26,924 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:09:26,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:09:26,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1951994857, now seen corresponding path program 1 times [2018-11-18 10:09:26,924 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:09:26,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:09:26,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:09:26,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:09:26,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:09:26,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:09:27,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 10:09:27,022 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:09:27,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 10:09:27,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 10:09:27,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 10:09:27,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:09:27,024 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2018-11-18 10:09:27,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:09:27,051 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2018-11-18 10:09:27,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 10:09:27,051 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-11-18 10:09:27,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:09:27,052 INFO L225 Difference]: With dead ends: 31 [2018-11-18 10:09:27,052 INFO L226 Difference]: Without dead ends: 23 [2018-11-18 10:09:27,053 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:09:27,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-18 10:09:27,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-11-18 10:09:27,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-18 10:09:27,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-11-18 10:09:27,057 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 20 [2018-11-18 10:09:27,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:09:27,057 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-11-18 10:09:27,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 10:09:27,057 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-11-18 10:09:27,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-18 10:09:27,058 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:09:27,058 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:09:27,058 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:09:27,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:09:27,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1923365706, now seen corresponding path program 1 times [2018-11-18 10:09:27,058 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:09:27,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:09:27,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:09:27,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:09:27,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:09:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:09:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 10:09:27,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:09:27,180 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ee00745d-f8df-460d-966f-a4b337226fbe/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:09:27,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:09:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:09:27,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:09:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 10:09:27,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:09:27,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-18 10:09:27,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 10:09:27,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 10:09:27,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-11-18 10:09:27,273 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 9 states. [2018-11-18 10:09:27,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:09:27,333 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-11-18 10:09:27,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 10:09:27,333 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2018-11-18 10:09:27,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:09:27,334 INFO L225 Difference]: With dead ends: 27 [2018-11-18 10:09:27,334 INFO L226 Difference]: Without dead ends: 23 [2018-11-18 10:09:27,334 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-11-18 10:09:27,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-18 10:09:27,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-18 10:09:27,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-18 10:09:27,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-11-18 10:09:27,337 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2018-11-18 10:09:27,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:09:27,337 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-11-18 10:09:27,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 10:09:27,338 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-11-18 10:09:27,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-18 10:09:27,338 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:09:27,338 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:09:27,338 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:09:27,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:09:27,339 INFO L82 PathProgramCache]: Analyzing trace with hash 376843494, now seen corresponding path program 1 times [2018-11-18 10:09:27,339 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:09:27,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:09:27,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:09:27,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:09:27,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:09:27,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:09:27,401 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-18 10:09:27,401 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:09:27,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 10:09:27,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 10:09:27,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 10:09:27,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:09:27,402 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2018-11-18 10:09:27,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:09:27,413 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-11-18 10:09:27,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 10:09:27,414 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-11-18 10:09:27,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:09:27,414 INFO L225 Difference]: With dead ends: 29 [2018-11-18 10:09:27,414 INFO L226 Difference]: Without dead ends: 25 [2018-11-18 10:09:27,415 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:09:27,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-18 10:09:27,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2018-11-18 10:09:27,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-18 10:09:27,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-11-18 10:09:27,419 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 27 [2018-11-18 10:09:27,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:09:27,419 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-11-18 10:09:27,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 10:09:27,419 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-11-18 10:09:27,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-18 10:09:27,420 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:09:27,420 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:09:27,421 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:09:27,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:09:27,421 INFO L82 PathProgramCache]: Analyzing trace with hash 405472645, now seen corresponding path program 2 times [2018-11-18 10:09:27,421 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:09:27,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:09:27,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:09:27,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:09:27,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:09:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:09:27,540 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 10:09:27,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:09:27,541 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ee00745d-f8df-460d-966f-a4b337226fbe/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:09:27,565 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 10:09:27,577 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 10:09:27,577 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:09:27,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:09:27,608 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 10:09:27,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:09:27,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-18 10:09:27,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 10:09:27,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 10:09:27,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2018-11-18 10:09:27,624 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 12 states. [2018-11-18 10:09:27,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:09:27,695 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2018-11-18 10:09:27,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 10:09:27,696 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2018-11-18 10:09:27,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:09:27,696 INFO L225 Difference]: With dead ends: 41 [2018-11-18 10:09:27,696 INFO L226 Difference]: Without dead ends: 29 [2018-11-18 10:09:27,697 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-11-18 10:09:27,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-18 10:09:27,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2018-11-18 10:09:27,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-18 10:09:27,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2018-11-18 10:09:27,700 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 27 [2018-11-18 10:09:27,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:09:27,700 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2018-11-18 10:09:27,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 10:09:27,700 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2018-11-18 10:09:27,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-18 10:09:27,701 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:09:27,701 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:09:27,701 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:09:27,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:09:27,701 INFO L82 PathProgramCache]: Analyzing trace with hash -617031938, now seen corresponding path program 3 times [2018-11-18 10:09:27,701 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:09:27,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:09:27,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:09:27,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:09:27,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:09:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:09:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 10:09:27,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:09:27,799 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ee00745d-f8df-460d-966f-a4b337226fbe/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:09:27,805 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 10:09:27,811 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-18 10:09:27,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:09:27,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:09:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-11-18 10:09:27,881 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 10:09:27,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2018-11-18 10:09:27,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 10:09:27,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 10:09:27,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2018-11-18 10:09:27,882 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 14 states. [2018-11-18 10:09:27,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:09:27,952 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2018-11-18 10:09:27,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 10:09:27,952 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2018-11-18 10:09:27,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:09:27,953 INFO L225 Difference]: With dead ends: 33 [2018-11-18 10:09:27,953 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 10:09:27,953 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2018-11-18 10:09:27,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 10:09:27,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 10:09:27,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 10:09:27,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 10:09:27,954 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2018-11-18 10:09:27,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:09:27,955 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 10:09:27,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 10:09:27,955 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 10:09:27,955 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 10:09:27,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 10:09:27,966 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 10:09:27,966 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 10:09:27,966 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 10:09:27,966 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 10:09:27,966 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 10:09:27,967 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 10:09:27,967 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2018-11-18 10:09:27,967 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2018-11-18 10:09:27,967 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2018-11-18 10:09:27,967 INFO L425 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2018-11-18 10:09:27,967 INFO L425 ceAbstractionStarter]: For program point L14(lines 14 16) no Hoare annotation was computed. [2018-11-18 10:09:27,967 INFO L428 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: true [2018-11-18 10:09:27,967 INFO L425 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-11-18 10:09:27,967 INFO L425 ceAbstractionStarter]: For program point L14-2(lines 11 17) no Hoare annotation was computed. [2018-11-18 10:09:27,967 INFO L425 ceAbstractionStarter]: For program point idFINAL(lines 4 9) no Hoare annotation was computed. [2018-11-18 10:09:27,968 INFO L425 ceAbstractionStarter]: For program point idEXIT(lines 4 9) no Hoare annotation was computed. [2018-11-18 10:09:27,968 INFO L428 ceAbstractionStarter]: At program point idENTRY(lines 4 9) the Hoare annotation is: true [2018-11-18 10:09:27,968 INFO L425 ceAbstractionStarter]: For program point L7(line 7) no Hoare annotation was computed. [2018-11-18 10:09:27,968 INFO L428 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: true [2018-11-18 10:09:27,968 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-18 10:09:27,968 INFO L425 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2018-11-18 10:09:27,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 10:09:27 BoogieIcfgContainer [2018-11-18 10:09:27,970 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 10:09:27,970 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 10:09:27,971 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 10:09:27,971 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 10:09:27,971 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:09:26" (3/4) ... [2018-11-18 10:09:27,973 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 10:09:27,977 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 10:09:27,978 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 10:09:27,978 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2018-11-18 10:09:27,981 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-18 10:09:27,981 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-18 10:09:27,981 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 10:09:28,005 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_ee00745d-f8df-460d-966f-a4b337226fbe/bin-2019/uautomizer/witness.graphml [2018-11-18 10:09:28,005 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 10:09:28,005 INFO L168 Benchmark]: Toolchain (without parser) took 1759.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.0 MB). Free memory was 959.1 MB in the beginning and 948.3 MB in the end (delta: 10.8 MB). Peak memory consumption was 161.8 MB. Max. memory is 11.5 GB. [2018-11-18 10:09:28,006 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 10:09:28,006 INFO L168 Benchmark]: CACSL2BoogieTranslator took 139.02 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.3 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2018-11-18 10:09:28,007 INFO L168 Benchmark]: Boogie Preprocessor took 16.68 ms. Allocated memory is still 1.0 GB. Free memory is still 948.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 10:09:28,007 INFO L168 Benchmark]: RCFGBuilder took 174.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.0 MB). Free memory was 948.3 MB in the beginning and 1.1 GB in the end (delta: -188.8 MB). Peak memory consumption was 22.1 MB. Max. memory is 11.5 GB. [2018-11-18 10:09:28,007 INFO L168 Benchmark]: TraceAbstraction took 1392.32 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 948.3 MB in the end (delta: 188.8 MB). Peak memory consumption was 188.8 MB. Max. memory is 11.5 GB. [2018-11-18 10:09:28,008 INFO L168 Benchmark]: Witness Printer took 34.37 ms. Allocated memory is still 1.2 GB. Free memory is still 948.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 10:09:28,010 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 139.02 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.3 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.68 ms. Allocated memory is still 1.0 GB. Free memory is still 948.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 174.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.0 MB). Free memory was 948.3 MB in the beginning and 1.1 GB in the end (delta: -188.8 MB). Peak memory consumption was 22.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1392.32 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 948.3 MB in the end (delta: 188.8 MB). Peak memory consumption was 188.8 MB. Max. memory is 11.5 GB. * Witness Printer took 34.37 ms. Allocated memory is still 1.2 GB. Free memory is still 948.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: 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, 21 locations, 1 error locations. SAFE Result, 1.3s OverallTime, 6 OverallIterations, 4 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 116 SDtfs, 16 SDslu, 609 SDs, 0 SdLazy, 187 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s 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, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 7 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 222 NumberOfCodeBlocks, 208 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 213 ConstructedInterpolants, 0 QuantifiedInterpolants, 15747 SizeOfPredicates, 7 NumberOfNonLiveVariables, 150 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 9 InterpolantComputations, 4 PerfectInterpolantSequences, 91/123 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...