./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/half.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_f2beca48-c901-4838-aa8c-1483fb152ec7/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_f2beca48-c901-4838-aa8c-1483fb152ec7/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f2beca48-c901-4838-aa8c-1483fb152ec7/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f2beca48-c901-4838-aa8c-1483fb152ec7/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-new/half.i -s /tmp/vcloud-vcloud-master/worker/run_dir_f2beca48-c901-4838-aa8c-1483fb152ec7/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f2beca48-c901-4838-aa8c-1483fb152ec7/bin/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 14367fbcb63815bbc35abe1c5a8e938762f99ead ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 01:15:22,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 01:15:22,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 01:15:22,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 01:15:22,608 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 01:15:22,610 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 01:15:22,611 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 01:15:22,619 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 01:15:22,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 01:15:22,628 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 01:15:22,629 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 01:15:22,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 01:15:22,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 01:15:22,632 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 01:15:22,633 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 01:15:22,634 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 01:15:22,635 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 01:15:22,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 01:15:22,638 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 01:15:22,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 01:15:22,645 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 01:15:22,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 01:15:22,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 01:15:22,649 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 01:15:22,653 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 01:15:22,653 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 01:15:22,653 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 01:15:22,655 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 01:15:22,655 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 01:15:22,656 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 01:15:22,656 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 01:15:22,657 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 01:15:22,657 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 01:15:22,658 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 01:15:22,659 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 01:15:22,659 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 01:15:22,659 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 01:15:22,660 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 01:15:22,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 01:15:22,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 01:15:22,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 01:15:22,662 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f2beca48-c901-4838-aa8c-1483fb152ec7/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 01:15:22,685 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 01:15:22,695 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 01:15:22,696 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 01:15:22,696 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 01:15:22,696 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 01:15:22,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 01:15:22,697 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 01:15:22,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 01:15:22,697 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 01:15:22,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 01:15:22,698 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 01:15:22,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 01:15:22,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 01:15:22,698 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 01:15:22,700 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 01:15:22,700 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 01:15:22,700 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 01:15:22,700 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 01:15:22,700 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 01:15:22,701 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 01:15:22,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 01:15:22,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 01:15:22,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 01:15:22,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 01:15:22,702 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 01:15:22,702 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 01:15:22,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 01:15:22,703 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 01:15:22,703 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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/run_dir_f2beca48-c901-4838-aa8c-1483fb152ec7/bin/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 -> 14367fbcb63815bbc35abe1c5a8e938762f99ead [2019-11-20 01:15:22,875 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 01:15:22,887 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 01:15:22,890 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 01:15:22,891 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 01:15:22,892 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 01:15:22,892 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f2beca48-c901-4838-aa8c-1483fb152ec7/bin/uautomizer/../../sv-benchmarks/c/loop-new/half.i [2019-11-20 01:15:22,941 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f2beca48-c901-4838-aa8c-1483fb152ec7/bin/uautomizer/data/9fd31fc55/aef21b427f9f4492b5fcb464a3636f9e/FLAG6bc6260b0 [2019-11-20 01:15:23,350 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 01:15:23,350 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f2beca48-c901-4838-aa8c-1483fb152ec7/sv-benchmarks/c/loop-new/half.i [2019-11-20 01:15:23,355 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f2beca48-c901-4838-aa8c-1483fb152ec7/bin/uautomizer/data/9fd31fc55/aef21b427f9f4492b5fcb464a3636f9e/FLAG6bc6260b0 [2019-11-20 01:15:23,369 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f2beca48-c901-4838-aa8c-1483fb152ec7/bin/uautomizer/data/9fd31fc55/aef21b427f9f4492b5fcb464a3636f9e [2019-11-20 01:15:23,372 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 01:15:23,373 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 01:15:23,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 01:15:23,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 01:15:23,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 01:15:23,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 01:15:23" (1/1) ... [2019-11-20 01:15:23,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71b1d31a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:15:23, skipping insertion in model container [2019-11-20 01:15:23,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 01:15:23" (1/1) ... [2019-11-20 01:15:23,390 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 01:15:23,403 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 01:15:23,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 01:15:23,593 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 01:15:23,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 01:15:23,725 INFO L192 MainTranslator]: Completed translation [2019-11-20 01:15:23,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:15:23 WrapperNode [2019-11-20 01:15:23,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 01:15:23,727 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 01:15:23,727 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 01:15:23,727 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 01:15:23,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:15:23" (1/1) ... [2019-11-20 01:15:23,739 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:15:23" (1/1) ... [2019-11-20 01:15:23,757 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 01:15:23,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 01:15:23,759 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 01:15:23,760 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 01:15:23,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:15:23" (1/1) ... [2019-11-20 01:15:23,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:15:23" (1/1) ... [2019-11-20 01:15:23,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:15:23" (1/1) ... [2019-11-20 01:15:23,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:15:23" (1/1) ... [2019-11-20 01:15:23,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:15:23" (1/1) ... [2019-11-20 01:15:23,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:15:23" (1/1) ... [2019-11-20 01:15:23,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:15:23" (1/1) ... [2019-11-20 01:15:23,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 01:15:23,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 01:15:23,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 01:15:23,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 01:15:23,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:15:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f2beca48-c901-4838-aa8c-1483fb152ec7/bin/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 [2019-11-20 01:15:23,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 01:15:23,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 01:15:24,003 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 01:15:24,003 INFO L285 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-20 01:15:24,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 01:15:24 BoogieIcfgContainer [2019-11-20 01:15:24,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 01:15:24,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 01:15:24,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 01:15:24,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 01:15:24,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 01:15:23" (1/3) ... [2019-11-20 01:15:24,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d8f2917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 01:15:24, skipping insertion in model container [2019-11-20 01:15:24,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:15:23" (2/3) ... [2019-11-20 01:15:24,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d8f2917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 01:15:24, skipping insertion in model container [2019-11-20 01:15:24,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 01:15:24" (3/3) ... [2019-11-20 01:15:24,011 INFO L109 eAbstractionObserver]: Analyzing ICFG half.i [2019-11-20 01:15:24,019 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 01:15:24,034 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 01:15:24,043 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 01:15:24,069 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 01:15:24,070 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 01:15:24,070 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 01:15:24,070 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 01:15:24,070 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 01:15:24,070 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 01:15:24,070 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 01:15:24,070 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 01:15:24,090 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2019-11-20 01:15:24,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-20 01:15:24,097 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:15:24,098 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-20 01:15:24,098 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 01:15:24,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:15:24,104 INFO L82 PathProgramCache]: Analyzing trace with hash 922384074, now seen corresponding path program 1 times [2019-11-20 01:15:24,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:15:24,114 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403812937] [2019-11-20 01:15:24,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:15:24,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:15:24,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:15:24,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403812937] [2019-11-20 01:15:24,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 01:15:24,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-20 01:15:24,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996750900] [2019-11-20 01:15:24,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-20 01:15:24,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 01:15:24,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-20 01:15:24,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 01:15:24,224 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2019-11-20 01:15:24,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:15:24,236 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2019-11-20 01:15:24,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-20 01:15:24,237 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2019-11-20 01:15:24,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:15:24,243 INFO L225 Difference]: With dead ends: 21 [2019-11-20 01:15:24,243 INFO L226 Difference]: Without dead ends: 9 [2019-11-20 01:15:24,245 INFO L630 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 [2019-11-20 01:15:24,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-20 01:15:24,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-20 01:15:24,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-20 01:15:24,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-11-20 01:15:24,267 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2019-11-20 01:15:24,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:15:24,267 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-11-20 01:15:24,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-20 01:15:24,268 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-11-20 01:15:24,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-20 01:15:24,268 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:15:24,268 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-20 01:15:24,269 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 01:15:24,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:15:24,269 INFO L82 PathProgramCache]: Analyzing trace with hash 922056373, now seen corresponding path program 1 times [2019-11-20 01:15:24,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:15:24,270 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101878327] [2019-11-20 01:15:24,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:15:24,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:15:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:15:24,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101878327] [2019-11-20 01:15:24,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 01:15:24,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 01:15:24,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741214909] [2019-11-20 01:15:24,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 01:15:24,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 01:15:24,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 01:15:24,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 01:15:24,462 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 6 states. [2019-11-20 01:15:24,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:15:24,594 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2019-11-20 01:15:24,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 01:15:24,595 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2019-11-20 01:15:24,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:15:24,597 INFO L225 Difference]: With dead ends: 23 [2019-11-20 01:15:24,597 INFO L226 Difference]: Without dead ends: 19 [2019-11-20 01:15:24,598 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-20 01:15:24,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-20 01:15:24,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 10. [2019-11-20 01:15:24,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-20 01:15:24,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2019-11-20 01:15:24,607 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2019-11-20 01:15:24,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:15:24,607 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-11-20 01:15:24,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 01:15:24,607 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2019-11-20 01:15:24,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 01:15:24,608 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:15:24,608 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:15:24,609 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 01:15:24,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:15:24,609 INFO L82 PathProgramCache]: Analyzing trace with hash -90418981, now seen corresponding path program 1 times [2019-11-20 01:15:24,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:15:24,610 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638329067] [2019-11-20 01:15:24,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:15:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:15:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:15:24,845 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638329067] [2019-11-20 01:15:24,845 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396597505] [2019-11-20 01:15:24,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f2beca48-c901-4838-aa8c-1483fb152ec7/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-20 01:15:24,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 01:15:24,876 INFO L255 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 01:15:24,880 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:15:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:15:25,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:15:25,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-20 01:15:25,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432205306] [2019-11-20 01:15:25,003 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-20 01:15:25,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 01:15:25,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-20 01:15:25,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-20 01:15:25,005 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 13 states. [2019-11-20 01:15:25,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:15:25,173 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2019-11-20 01:15:25,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 01:15:25,174 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 9 [2019-11-20 01:15:25,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:15:25,175 INFO L225 Difference]: With dead ends: 23 [2019-11-20 01:15:25,175 INFO L226 Difference]: Without dead ends: 16 [2019-11-20 01:15:25,176 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2019-11-20 01:15:25,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-20 01:15:25,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2019-11-20 01:15:25,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-20 01:15:25,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-20 01:15:25,179 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2019-11-20 01:15:25,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:15:25,180 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-20 01:15:25,180 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-20 01:15:25,180 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-20 01:15:25,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 01:15:25,181 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:15:25,181 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 01:15:25,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 01:15:25,382 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 01:15:25,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:15:25,382 INFO L82 PathProgramCache]: Analyzing trace with hash 811629813, now seen corresponding path program 2 times [2019-11-20 01:15:25,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:15:25,383 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387582484] [2019-11-20 01:15:25,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:15:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:15:25,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:15:25,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387582484] [2019-11-20 01:15:25,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497082402] [2019-11-20 01:15:25,445 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f2beca48-c901-4838-aa8c-1483fb152ec7/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 01:15:25,472 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 01:15:25,472 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 01:15:25,473 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 01:15:25,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:15:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:15:25,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:15:25,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2019-11-20 01:15:25,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881777942] [2019-11-20 01:15:25,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 01:15:25,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 01:15:25,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 01:15:25,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 01:15:25,502 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 4 states. [2019-11-20 01:15:25,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:15:25,539 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2019-11-20 01:15:25,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 01:15:25,539 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-20 01:15:25,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:15:25,540 INFO L225 Difference]: With dead ends: 22 [2019-11-20 01:15:25,540 INFO L226 Difference]: Without dead ends: 15 [2019-11-20 01:15:25,541 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 01:15:25,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-20 01:15:25,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-20 01:15:25,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-20 01:15:25,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-20 01:15:25,544 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2019-11-20 01:15:25,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:15:25,545 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-20 01:15:25,545 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 01:15:25,545 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-20 01:15:25,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 01:15:25,546 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:15:25,546 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:15:25,753 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 01:15:25,753 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 01:15:25,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:15:25,754 INFO L82 PathProgramCache]: Analyzing trace with hash 868888115, now seen corresponding path program 1 times [2019-11-20 01:15:25,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:15:25,754 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385531407] [2019-11-20 01:15:25,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:15:25,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:15:25,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:15:25,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385531407] [2019-11-20 01:15:25,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053409045] [2019-11-20 01:15:25,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f2beca48-c901-4838-aa8c-1483fb152ec7/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-20 01:15:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 01:15:26,040 WARN L253 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 01:15:26,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:15:26,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:15:26,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:15:26,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:15:26,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-11-20 01:15:26,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080962414] [2019-11-20 01:15:26,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-20 01:15:26,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 01:15:26,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-20 01:15:26,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2019-11-20 01:15:26,265 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 17 states. [2019-11-20 01:15:26,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:15:26,581 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2019-11-20 01:15:26,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-20 01:15:26,582 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 12 [2019-11-20 01:15:26,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:15:26,583 INFO L225 Difference]: With dead ends: 38 [2019-11-20 01:15:26,583 INFO L226 Difference]: Without dead ends: 27 [2019-11-20 01:15:26,584 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2019-11-20 01:15:26,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-20 01:15:26,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2019-11-20 01:15:26,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-20 01:15:26,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-11-20 01:15:26,588 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2019-11-20 01:15:26,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:15:26,588 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-11-20 01:15:26,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-20 01:15:26,588 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-11-20 01:15:26,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-20 01:15:26,589 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:15:26,589 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:15:26,790 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 01:15:26,790 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 01:15:26,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:15:26,790 INFO L82 PathProgramCache]: Analyzing trace with hash 816939165, now seen corresponding path program 2 times [2019-11-20 01:15:26,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:15:26,791 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396225205] [2019-11-20 01:15:26,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:15:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:15:27,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 01:15:27,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396225205] [2019-11-20 01:15:27,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477987278] [2019-11-20 01:15:27,035 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f2beca48-c901-4838-aa8c-1483fb152ec7/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 01:15:27,063 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 01:15:27,063 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 01:15:27,064 INFO L255 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-20 01:15:27,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:15:27,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:15:27,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:15:27,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2019-11-20 01:15:27,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22832105] [2019-11-20 01:15:27,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-20 01:15:27,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 01:15:27,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-20 01:15:27,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2019-11-20 01:15:27,207 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 18 states. [2019-11-20 01:15:27,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:15:27,563 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2019-11-20 01:15:27,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 01:15:27,564 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 15 [2019-11-20 01:15:27,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:15:27,565 INFO L225 Difference]: With dead ends: 36 [2019-11-20 01:15:27,565 INFO L226 Difference]: Without dead ends: 26 [2019-11-20 01:15:27,565 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2019-11-20 01:15:27,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-20 01:15:27,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2019-11-20 01:15:27,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-20 01:15:27,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-11-20 01:15:27,569 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 15 [2019-11-20 01:15:27,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:15:27,569 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-11-20 01:15:27,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-20 01:15:27,577 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-11-20 01:15:27,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-20 01:15:27,578 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:15:27,578 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1] [2019-11-20 01:15:27,779 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 01:15:27,779 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 01:15:27,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:15:27,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1279408559, now seen corresponding path program 3 times [2019-11-20 01:15:27,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:15:27,780 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764271061] [2019-11-20 01:15:27,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:15:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:15:28,084 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-20 01:15:28,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764271061] [2019-11-20 01:15:28,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136618779] [2019-11-20 01:15:28,085 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f2beca48-c901-4838-aa8c-1483fb152ec7/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 01:15:28,111 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-20 01:15:28,111 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 01:15:28,112 WARN L253 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-20 01:15:28,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:15:28,434 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:15:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:15:28,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:15:28,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 25 [2019-11-20 01:15:28,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956650791] [2019-11-20 01:15:28,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-20 01:15:28,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 01:15:28,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-20 01:15:28,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2019-11-20 01:15:28,467 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 26 states. [2019-11-20 01:15:28,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:15:28,931 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2019-11-20 01:15:28,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-20 01:15:28,931 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 24 [2019-11-20 01:15:28,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:15:28,932 INFO L225 Difference]: With dead ends: 34 [2019-11-20 01:15:28,932 INFO L226 Difference]: Without dead ends: 0 [2019-11-20 01:15:28,933 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2019-11-20 01:15:28,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-20 01:15:28,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-20 01:15:28,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-20 01:15:28,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 01:15:28,933 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2019-11-20 01:15:28,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:15:28,933 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 01:15:28,934 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-20 01:15:28,934 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-20 01:15:28,934 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 01:15:29,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 01:15:29,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-20 01:15:29,219 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-20 01:15:29,219 INFO L447 ceAbstractionStarter]: At program point L21(lines 10 22) the Hoare annotation is: true [2019-11-20 01:15:29,219 INFO L444 ceAbstractionStarter]: For program point L15-2(lines 15 19) no Hoare annotation was computed. [2019-11-20 01:15:29,220 INFO L440 ceAbstractionStarter]: At program point L15-3(lines 15 19) the Hoare annotation is: (let ((.cse0 (* 2 ULTIMATE.start_main_~n~0)) (.cse1 (<= ULTIMATE.start_main_~n~0 ULTIMATE.start_main_~k~0))) (or (and (<= .cse0 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 .cse0) .cse1) (and (<= ULTIMATE.start_main_~n~0 0) (<= 0 ULTIMATE.start_main_~n~0) (= ULTIMATE.start_main_~i~0 0)) (let ((.cse2 (+ ULTIMATE.start_main_~i~0 1))) (and (<= .cse0 .cse2) (<= .cse2 .cse0) .cse1)))) [2019-11-20 01:15:29,220 INFO L444 ceAbstractionStarter]: For program point L15-4(lines 15 19) no Hoare annotation was computed. [2019-11-20 01:15:29,220 INFO L444 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-20 01:15:29,220 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-20 01:15:29,220 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-20 01:15:29,220 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-11-20 01:15:29,220 INFO L444 ceAbstractionStarter]: For program point L16(lines 16 18) no Hoare annotation was computed. [2019-11-20 01:15:29,220 INFO L444 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2019-11-20 01:15:29,220 INFO L444 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-11-20 01:15:29,221 INFO L447 ceAbstractionStarter]: At program point L4-2(lines 3 8) the Hoare annotation is: true [2019-11-20 01:15:29,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 01:15:29 BoogieIcfgContainer [2019-11-20 01:15:29,233 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 01:15:29,233 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 01:15:29,234 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 01:15:29,234 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 01:15:29,234 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 01:15:24" (3/4) ... [2019-11-20 01:15:29,237 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 01:15:29,244 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-11-20 01:15:29,245 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-20 01:15:29,297 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f2beca48-c901-4838-aa8c-1483fb152ec7/bin/uautomizer/witness.graphml [2019-11-20 01:15:29,298 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 01:15:29,299 INFO L168 Benchmark]: Toolchain (without parser) took 5926.11 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 169.9 MB). Free memory was 943.4 MB in the beginning and 1.2 GB in the end (delta: -225.6 MB). Peak memory consumption was 213.4 MB. Max. memory is 11.5 GB. [2019-11-20 01:15:29,300 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 01:15:29,300 INFO L168 Benchmark]: CACSL2BoogieTranslator took 352.67 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -194.2 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-11-20 01:15:29,301 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.37 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 01:15:29,301 INFO L168 Benchmark]: Boogie Preprocessor took 19.52 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-11-20 01:15:29,302 INFO L168 Benchmark]: RCFGBuilder took 225.62 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. [2019-11-20 01:15:29,302 INFO L168 Benchmark]: TraceAbstraction took 5227.86 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 870.0 MB in the end (delta: 246.4 MB). Peak memory consumption was 246.4 MB. Max. memory is 11.5 GB. [2019-11-20 01:15:29,303 INFO L168 Benchmark]: Witness Printer took 64.19 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 29.9 MB). Free memory was 870.0 MB in the beginning and 1.2 GB in the end (delta: -299.0 MB). Peak memory consumption was 21.4 kB. Max. memory is 11.5 GB. [2019-11-20 01:15:29,305 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 352.67 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -194.2 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 32.37 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.52 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 225.62 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5227.86 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 870.0 MB in the end (delta: 246.4 MB). Peak memory consumption was 246.4 MB. Max. memory is 11.5 GB. * Witness Printer took 64.19 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 29.9 MB). Free memory was 870.0 MB in the beginning and 1.2 GB in the end (delta: -299.0 MB). Peak memory consumption was 21.4 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: (((2 * n <= i && i <= 2 * n) && n <= k) || ((n <= 0 && 0 <= n) && i == 0)) || ((2 * n <= i + 1 && i + 1 <= 2 * n) && n <= k) - InvariantResult [Line: 3]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Result: SAFE, OverallTime: 5.1s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 43 SDtfs, 101 SDslu, 87 SDs, 0 SdLazy, 757 SolverSat, 56 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 149 GetRequests, 41 SyntacticMatches, 9 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 19 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 14 NumberOfFragments, 45 HoareAnnotationTreeSize, 3 FomulaSimplifications, 104 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 147 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 156 NumberOfCodeBlocks, 156 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 144 ConstructedInterpolants, 0 QuantifiedInterpolants, 22794 SizeOfPredicates, 17 NumberOfNonLiveVariables, 193 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 17/148 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...