./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/half_true-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_fa5eb6c1-2867-4c03-9a92-7f560b183427/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_fa5eb6c1-2867-4c03-9a92-7f560b183427/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_fa5eb6c1-2867-4c03-9a92-7f560b183427/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_fa5eb6c1-2867-4c03-9a92-7f560b183427/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-new/half_true-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_fa5eb6c1-2867-4c03-9a92-7f560b183427/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_fa5eb6c1-2867-4c03-9a92-7f560b183427/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 14367fbcb63815bbc35abe1c5a8e938762f99ead ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 17:13:01,822 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 17:13:01,823 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 17:13:01,832 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 17:13:01,832 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 17:13:01,832 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 17:13:01,833 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 17:13:01,834 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 17:13:01,836 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 17:13:01,836 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 17:13:01,837 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 17:13:01,837 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 17:13:01,838 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 17:13:01,838 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 17:13:01,839 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 17:13:01,840 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 17:13:01,840 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 17:13:01,842 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 17:13:01,843 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 17:13:01,844 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 17:13:01,845 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 17:13:01,846 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 17:13:01,847 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 17:13:01,847 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 17:13:01,848 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 17:13:01,848 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 17:13:01,849 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 17:13:01,849 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 17:13:01,850 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 17:13:01,850 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 17:13:01,851 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 17:13:01,851 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 17:13:01,851 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 17:13:01,852 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 17:13:01,852 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 17:13:01,853 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 17:13:01,853 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_fa5eb6c1-2867-4c03-9a92-7f560b183427/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-09 17:13:01,864 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 17:13:01,864 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 17:13:01,864 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 17:13:01,865 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 17:13:01,865 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 17:13:01,865 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 17:13:01,865 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 17:13:01,865 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 17:13:01,865 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 17:13:01,865 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 17:13:01,866 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 17:13:01,866 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 17:13:01,866 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 17:13:01,866 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 17:13:01,867 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 17:13:01,867 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 17:13:01,867 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 17:13:01,867 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 17:13:01,867 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 17:13:01,867 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 17:13:01,868 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 17:13:01,868 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 17:13:01,868 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 17:13:01,868 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 17:13:01,868 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 17:13:01,868 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 17:13:01,869 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 17:13:01,869 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 17:13:01,869 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 17:13:01,869 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 17:13:01,869 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 17:13:01,869 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 17:13:01,869 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 17:13:01,870 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 17:13:01,870 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 17:13:01,870 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-09 17:13:01,870 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_fa5eb6c1-2867-4c03-9a92-7f560b183427/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14367fbcb63815bbc35abe1c5a8e938762f99ead [2018-12-09 17:13:01,888 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 17:13:01,898 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 17:13:01,900 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 17:13:01,901 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 17:13:01,902 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 17:13:01,902 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_fa5eb6c1-2867-4c03-9a92-7f560b183427/bin-2019/utaipan/../../sv-benchmarks/c/loop-new/half_true-unreach-call_true-termination.i [2018-12-09 17:13:01,941 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_fa5eb6c1-2867-4c03-9a92-7f560b183427/bin-2019/utaipan/data/e4c2bd3dc/4532adbb8bb44dcf858d0ed779437a1a/FLAG10ca6e796 [2018-12-09 17:13:02,244 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 17:13:02,244 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_fa5eb6c1-2867-4c03-9a92-7f560b183427/sv-benchmarks/c/loop-new/half_true-unreach-call_true-termination.i [2018-12-09 17:13:02,247 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_fa5eb6c1-2867-4c03-9a92-7f560b183427/bin-2019/utaipan/data/e4c2bd3dc/4532adbb8bb44dcf858d0ed779437a1a/FLAG10ca6e796 [2018-12-09 17:13:02,669 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_fa5eb6c1-2867-4c03-9a92-7f560b183427/bin-2019/utaipan/data/e4c2bd3dc/4532adbb8bb44dcf858d0ed779437a1a [2018-12-09 17:13:02,672 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 17:13:02,673 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 17:13:02,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 17:13:02,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 17:13:02,677 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 17:13:02,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:13:02" (1/1) ... [2018-12-09 17:13:02,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18a007e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:13:02, skipping insertion in model container [2018-12-09 17:13:02,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:13:02" (1/1) ... [2018-12-09 17:13:02,684 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 17:13:02,696 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 17:13:02,795 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 17:13:02,797 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 17:13:02,807 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 17:13:02,815 INFO L195 MainTranslator]: Completed translation [2018-12-09 17:13:02,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:13:02 WrapperNode [2018-12-09 17:13:02,816 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 17:13:02,816 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 17:13:02,816 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 17:13:02,816 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 17:13:02,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:13:02" (1/1) ... [2018-12-09 17:13:02,824 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:13:02" (1/1) ... [2018-12-09 17:13:02,828 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 17:13:02,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 17:13:02,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 17:13:02,829 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 17:13:02,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:13:02" (1/1) ... [2018-12-09 17:13:02,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:13:02" (1/1) ... [2018-12-09 17:13:02,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:13:02" (1/1) ... [2018-12-09 17:13:02,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:13:02" (1/1) ... [2018-12-09 17:13:02,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:13:02" (1/1) ... [2018-12-09 17:13:02,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:13:02" (1/1) ... [2018-12-09 17:13:02,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:13:02" (1/1) ... [2018-12-09 17:13:02,842 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 17:13:02,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 17:13:02,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 17:13:02,842 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 17:13:02,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:13:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fa5eb6c1-2867-4c03-9a92-7f560b183427/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 17:13:02,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 17:13:02,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 17:13:02,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 17:13:02,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 17:13:02,911 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 17:13:02,911 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 17:13:02,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-09 17:13:02,911 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-09 17:13:03,000 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 17:13:03,000 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-09 17:13:03,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:13:03 BoogieIcfgContainer [2018-12-09 17:13:03,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 17:13:03,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 17:13:03,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 17:13:03,002 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 17:13:03,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:13:02" (1/3) ... [2018-12-09 17:13:03,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373f0c11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:13:03, skipping insertion in model container [2018-12-09 17:13:03,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:13:02" (2/3) ... [2018-12-09 17:13:03,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373f0c11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:13:03, skipping insertion in model container [2018-12-09 17:13:03,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:13:03" (3/3) ... [2018-12-09 17:13:03,004 INFO L112 eAbstractionObserver]: Analyzing ICFG half_true-unreach-call_true-termination.i [2018-12-09 17:13:03,010 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 17:13:03,014 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-09 17:13:03,023 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-09 17:13:03,040 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 17:13:03,040 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 17:13:03,040 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 17:13:03,040 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 17:13:03,041 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 17:13:03,041 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 17:13:03,041 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 17:13:03,041 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 17:13:03,050 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-12-09 17:13:03,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-09 17:13:03,053 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:13:03,053 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:13:03,055 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 17:13:03,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:13:03,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1995182865, now seen corresponding path program 1 times [2018-12-09 17:13:03,059 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:13:03,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:13:03,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:13:03,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:13:03,088 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:13:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:13:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:13:03,123 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 17:13:03,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 17:13:03,123 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 17:13:03,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-09 17:13:03,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-09 17:13:03,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-09 17:13:03,134 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2018-12-09 17:13:03,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:13:03,146 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-12-09 17:13:03,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-09 17:13:03,146 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-12-09 17:13:03,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:13:03,151 INFO L225 Difference]: With dead ends: 33 [2018-12-09 17:13:03,151 INFO L226 Difference]: Without dead ends: 14 [2018-12-09 17:13:03,153 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-09 17:13:03,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-12-09 17:13:03,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-12-09 17:13:03,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-09 17:13:03,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-12-09 17:13:03,173 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2018-12-09 17:13:03,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:13:03,173 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-12-09 17:13:03,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-09 17:13:03,173 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-12-09 17:13:03,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-09 17:13:03,173 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:13:03,174 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:13:03,174 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 17:13:03,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:13:03,174 INFO L82 PathProgramCache]: Analyzing trace with hash -2005341596, now seen corresponding path program 1 times [2018-12-09 17:13:03,174 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:13:03,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:13:03,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:13:03,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:13:03,175 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:13:03,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:13:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:13:03,287 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 17:13:03,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-12-09 17:13:03,288 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 17:13:03,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 17:13:03,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 17:13:03,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-12-09 17:13:03,289 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2018-12-09 17:13:03,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:13:03,346 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2018-12-09 17:13:03,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 17:13:03,347 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-12-09 17:13:03,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:13:03,348 INFO L225 Difference]: With dead ends: 26 [2018-12-09 17:13:03,349 INFO L226 Difference]: Without dead ends: 21 [2018-12-09 17:13:03,349 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-12-09 17:13:03,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-09 17:13:03,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2018-12-09 17:13:03,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-12-09 17:13:03,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-12-09 17:13:03,353 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2018-12-09 17:13:03,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:13:03,353 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-12-09 17:13:03,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 17:13:03,353 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-12-09 17:13:03,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-09 17:13:03,353 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:13:03,353 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:13:03,353 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 17:13:03,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:13:03,354 INFO L82 PathProgramCache]: Analyzing trace with hash -763628086, now seen corresponding path program 1 times [2018-12-09 17:13:03,354 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:13:03,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:13:03,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:13:03,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:13:03,355 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:13:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:13:03,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:13:03,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:13:03,421 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:13:03,422 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 15 with the following transitions: [2018-12-09 17:13:03,423 INFO L205 CegarAbsIntRunner]: [0], [4], [8], [14], [16], [19], [23], [30], [33], [35], [41], [42], [43], [45] [2018-12-09 17:13:03,441 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 17:13:03,442 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 17:13:03,545 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 17:13:03,546 INFO L272 AbstractInterpreter]: Visited 14 different actions 21 times. Merged at 3 different actions 3 times. Never widened. Performed 55 root evaluator evaluations with a maximum evaluation depth of 8. Performed 55 inverse root evaluator evaluations with a maximum inverse evaluation depth of 8. Found 1 fixpoints after 1 different actions. Largest state had 6 variables. [2018-12-09 17:13:03,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:13:03,551 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 17:13:03,551 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:13:03,552 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fa5eb6c1-2867-4c03-9a92-7f560b183427/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:13:03,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:13:03,560 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 17:13:03,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:13:03,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:13:03,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:13:03,635 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:13:03,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:13:03,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:13:03,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 14 [2018-12-09 17:13:03,703 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:13:03,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-09 17:13:03,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-09 17:13:03,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2018-12-09 17:13:03,704 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-12-09 17:13:03,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:13:03,775 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2018-12-09 17:13:03,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 17:13:03,775 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-12-09 17:13:03,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:13:03,776 INFO L225 Difference]: With dead ends: 29 [2018-12-09 17:13:03,776 INFO L226 Difference]: Without dead ends: 21 [2018-12-09 17:13:03,777 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2018-12-09 17:13:03,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-09 17:13:03,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-12-09 17:13:03,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-09 17:13:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-12-09 17:13:03,781 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2018-12-09 17:13:03,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:13:03,781 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-12-09 17:13:03,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-09 17:13:03,781 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-12-09 17:13:03,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-09 17:13:03,781 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:13:03,782 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:13:03,782 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 17:13:03,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:13:03,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1429772124, now seen corresponding path program 2 times [2018-12-09 17:13:03,782 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:13:03,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:13:03,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:13:03,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:13:03,783 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:13:03,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:13:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:13:03,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:13:03,839 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:13:03,839 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 17:13:03,839 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 17:13:03,839 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:13:03,839 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fa5eb6c1-2867-4c03-9a92-7f560b183427/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:13:03,848 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 17:13:03,849 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 17:13:03,860 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-09 17:13:03,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 17:13:03,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:13:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:13:03,886 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:13:06,498 WARN L180 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2018-12-09 17:13:06,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:13:06,516 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:13:06,517 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 7] total 11 [2018-12-09 17:13:06,517 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:13:06,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 17:13:06,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 17:13:06,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=76, Unknown=1, NotChecked=0, Total=110 [2018-12-09 17:13:06,518 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-12-09 17:13:06,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:13:06,545 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2018-12-09 17:13:06,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 17:13:06,545 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-12-09 17:13:06,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:13:06,546 INFO L225 Difference]: With dead ends: 28 [2018-12-09 17:13:06,546 INFO L226 Difference]: Without dead ends: 20 [2018-12-09 17:13:06,546 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=33, Invalid=76, Unknown=1, NotChecked=0, Total=110 [2018-12-09 17:13:06,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-09 17:13:06,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2018-12-09 17:13:06,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-12-09 17:13:06,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-12-09 17:13:06,550 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2018-12-09 17:13:06,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:13:06,550 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-12-09 17:13:06,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 17:13:06,550 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-12-09 17:13:06,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-09 17:13:06,551 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:13:06,551 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:13:06,551 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 17:13:06,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:13:06,551 INFO L82 PathProgramCache]: Analyzing trace with hash 345235238, now seen corresponding path program 1 times [2018-12-09 17:13:06,552 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:13:06,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:13:06,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 17:13:06,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:13:06,553 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:13:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:13:06,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:13:06,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:13:06,682 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:13:06,682 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-12-09 17:13:06,682 INFO L205 CegarAbsIntRunner]: [0], [4], [8], [14], [16], [19], [21], [23], [30], [33], [35], [41], [42], [43], [45] [2018-12-09 17:13:06,683 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 17:13:06,683 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 17:13:06,741 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 17:13:06,741 INFO L272 AbstractInterpreter]: Visited 15 different actions 42 times. Merged at 5 different actions 12 times. Widened at 1 different actions 1 times. Performed 112 root evaluator evaluations with a maximum evaluation depth of 10. Performed 112 inverse root evaluator evaluations with a maximum inverse evaluation depth of 10. Found 4 fixpoints after 3 different actions. Largest state had 6 variables. [2018-12-09 17:13:06,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:13:06,743 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 17:13:06,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:13:06,743 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fa5eb6c1-2867-4c03-9a92-7f560b183427/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:13:06,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:13:06,749 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 17:13:06,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:13:06,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:13:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:13:06,905 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:13:07,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:13:07,112 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:13:07,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 26 [2018-12-09 17:13:07,112 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:13:07,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-09 17:13:07,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-09 17:13:07,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2018-12-09 17:13:07,113 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 17 states. [2018-12-09 17:13:07,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:13:07,281 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2018-12-09 17:13:07,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-09 17:13:07,282 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-12-09 17:13:07,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:13:07,282 INFO L225 Difference]: With dead ends: 40 [2018-12-09 17:13:07,282 INFO L226 Difference]: Without dead ends: 28 [2018-12-09 17:13:07,283 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2018-12-09 17:13:07,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-09 17:13:07,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2018-12-09 17:13:07,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-09 17:13:07,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-12-09 17:13:07,285 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2018-12-09 17:13:07,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:13:07,285 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-12-09 17:13:07,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-09 17:13:07,286 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-12-09 17:13:07,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-09 17:13:07,286 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:13:07,286 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:13:07,286 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 17:13:07,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:13:07,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1034664986, now seen corresponding path program 2 times [2018-12-09 17:13:07,286 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:13:07,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:13:07,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:13:07,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:13:07,287 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:13:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:13:07,337 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:13:07,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:13:07,338 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:13:07,338 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 17:13:07,338 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 17:13:07,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:13:07,338 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fa5eb6c1-2867-4c03-9a92-7f560b183427/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:13:07,344 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 17:13:07,344 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 17:13:07,350 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-09 17:13:07,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 17:13:07,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:13:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-09 17:13:07,397 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:13:07,444 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-09 17:13:07,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:13:07,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2018-12-09 17:13:07,459 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:13:07,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-09 17:13:07,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-09 17:13:07,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-12-09 17:13:07,459 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 11 states. [2018-12-09 17:13:07,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:13:07,589 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2018-12-09 17:13:07,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 17:13:07,589 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2018-12-09 17:13:07,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:13:07,590 INFO L225 Difference]: With dead ends: 51 [2018-12-09 17:13:07,590 INFO L226 Difference]: Without dead ends: 43 [2018-12-09 17:13:07,590 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2018-12-09 17:13:07,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-12-09 17:13:07,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2018-12-09 17:13:07,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-12-09 17:13:07,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2018-12-09 17:13:07,593 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 23 [2018-12-09 17:13:07,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:13:07,594 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2018-12-09 17:13:07,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-09 17:13:07,594 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2018-12-09 17:13:07,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-09 17:13:07,594 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:13:07,594 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:13:07,594 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 17:13:07,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:13:07,594 INFO L82 PathProgramCache]: Analyzing trace with hash 45653034, now seen corresponding path program 3 times [2018-12-09 17:13:07,594 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:13:07,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:13:07,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 17:13:07,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:13:07,595 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:13:07,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:13:07,715 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-12-09 17:13:07,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:13:07,715 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:13:07,715 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 17:13:07,715 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 17:13:07,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:13:07,715 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fa5eb6c1-2867-4c03-9a92-7f560b183427/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:13:07,721 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 17:13:07,721 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 17:13:07,731 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 17:13:07,731 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 17:13:07,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:13:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:13:07,902 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:13:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:13:12,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:13:12,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 39 [2018-12-09 17:13:12,351 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:13:12,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-12-09 17:13:12,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-09 17:13:12,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1247, Unknown=15, NotChecked=0, Total=1482 [2018-12-09 17:13:12,352 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 25 states. [2018-12-09 17:13:12,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:13:12,733 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2018-12-09 17:13:12,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-12-09 17:13:12,733 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2018-12-09 17:13:12,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:13:12,733 INFO L225 Difference]: With dead ends: 59 [2018-12-09 17:13:12,733 INFO L226 Difference]: Without dead ends: 0 [2018-12-09 17:13:12,734 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=516, Invalid=2775, Unknown=15, NotChecked=0, Total=3306 [2018-12-09 17:13:12,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-09 17:13:12,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-09 17:13:12,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-09 17:13:12,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-09 17:13:12,734 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2018-12-09 17:13:12,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:13:12,734 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 17:13:12,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-12-09 17:13:12,735 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-09 17:13:12,735 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-09 17:13:12,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-09 17:13:12,840 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-09 17:13:12,840 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-09 17:13:12,840 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-09 17:13:12,840 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-09 17:13:12,840 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-09 17:13:12,841 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-09 17:13:12,841 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 10 22) the Hoare annotation is: true [2018-12-09 17:13:12,841 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 10 22) no Hoare annotation was computed. [2018-12-09 17:13:12,841 INFO L448 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2018-12-09 17:13:12,841 INFO L448 ceAbstractionStarter]: For program point L16(lines 16 18) no Hoare annotation was computed. [2018-12-09 17:13:12,841 INFO L448 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-12-09 17:13:12,841 INFO L448 ceAbstractionStarter]: For program point L15-2(lines 15 19) no Hoare annotation was computed. [2018-12-09 17:13:12,841 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 10 22) no Hoare annotation was computed. [2018-12-09 17:13:12,841 INFO L444 ceAbstractionStarter]: At program point L15-3(lines 15 19) the Hoare annotation is: (let ((.cse2 (<= 0 main_~i~0)) (.cse1 (* 2 main_~n~0)) (.cse3 (<= main_~n~0 main_~k~0))) (or (and (<= 0 main_~n~0) (<= main_~n~0 0) (= main_~i~0 0)) (let ((.cse0 (+ main_~i~0 1))) (and (<= .cse0 .cse1) .cse2 (<= .cse1 .cse0) .cse3)) (and .cse2 (<= main_~i~0 .cse1) (<= .cse1 main_~i~0) .cse3))) [2018-12-09 17:13:12,841 INFO L444 ceAbstractionStarter]: At program point L15-4(lines 15 19) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 main_~n~0))) (or (and (<= main_~n~0 0) .cse0) (and .cse0 (<= main_~n~0 main_~k~0)))) [2018-12-09 17:13:12,841 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-12-09 17:13:12,842 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-12-09 17:13:12,842 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-12-09 17:13:12,842 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-12-09 17:13:12,842 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-12-09 17:13:12,842 INFO L448 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-12-09 17:13:12,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:13:12 BoogieIcfgContainer [2018-12-09 17:13:12,850 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 17:13:12,850 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 17:13:12,851 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 17:13:12,851 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 17:13:12,851 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:13:03" (3/4) ... [2018-12-09 17:13:12,853 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-09 17:13:12,856 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-09 17:13:12,856 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-09 17:13:12,856 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-12-09 17:13:12,858 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-12-09 17:13:12,858 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2018-12-09 17:13:12,859 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-09 17:13:12,885 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_fa5eb6c1-2867-4c03-9a92-7f560b183427/bin-2019/utaipan/witness.graphml [2018-12-09 17:13:12,885 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 17:13:12,885 INFO L168 Benchmark]: Toolchain (without parser) took 10212.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.7 MB). Free memory was 949.7 MB in the beginning and 967.6 MB in the end (delta: -17.9 MB). Peak memory consumption was 125.8 MB. Max. memory is 11.5 GB. [2018-12-09 17:13:12,886 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 17:13:12,886 INFO L168 Benchmark]: CACSL2BoogieTranslator took 141.99 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 939.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 17:13:12,886 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.15 ms. Allocated memory is still 1.0 GB. Free memory is still 939.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 17:13:12,886 INFO L168 Benchmark]: Boogie Preprocessor took 13.32 ms. Allocated memory is still 1.0 GB. Free memory is still 939.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 17:13:12,887 INFO L168 Benchmark]: RCFGBuilder took 158.17 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.2 MB). Free memory was 939.0 MB in the beginning and 1.1 GB in the end (delta: -146.0 MB). Peak memory consumption was 15.4 MB. Max. memory is 11.5 GB. [2018-12-09 17:13:12,887 INFO L168 Benchmark]: TraceAbstraction took 9849.61 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 42.5 MB). Free memory was 1.1 GB in the beginning and 972.3 MB in the end (delta: 112.7 MB). Peak memory consumption was 155.2 MB. Max. memory is 11.5 GB. [2018-12-09 17:13:12,887 INFO L168 Benchmark]: Witness Printer took 34.32 ms. Allocated memory is still 1.2 GB. Free memory was 972.3 MB in the beginning and 967.6 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 11.5 GB. [2018-12-09 17:13:12,889 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 141.99 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 939.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.15 ms. Allocated memory is still 1.0 GB. Free memory is still 939.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.32 ms. Allocated memory is still 1.0 GB. Free memory is still 939.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 158.17 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.2 MB). Free memory was 939.0 MB in the beginning and 1.1 GB in the end (delta: -146.0 MB). Peak memory consumption was 15.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 9849.61 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 42.5 MB). Free memory was 1.1 GB in the beginning and 972.3 MB in the end (delta: 112.7 MB). Peak memory consumption was 155.2 MB. Max. memory is 11.5 GB. * Witness Printer took 34.32 ms. Allocated memory is still 1.2 GB. Free memory was 972.3 MB in the beginning and 967.6 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: (((0 <= n && n <= 0) && i == 0) || (((i + 1 <= 2 * n && 0 <= i) && 2 * n <= i + 1) && n <= k)) || (((0 <= i && i <= 2 * n) && 2 * n <= i) && n <= k) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. SAFE Result, 9.8s OverallTime, 7 OverallIterations, 6 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 81 SDtfs, 82 SDslu, 336 SDs, 0 SdLazy, 684 SolverSat, 59 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 290 GetRequests, 136 SyntacticMatches, 17 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 8.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 16 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 31 NumberOfFragments, 69 HoareAnnotationTreeSize, 17 FomulaSimplifications, 79 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 352 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 8.2s InterpolantComputationTime, 222 NumberOfCodeBlocks, 216 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 305 ConstructedInterpolants, 22 QuantifiedInterpolants, 46479 SizeOfPredicates, 18 NumberOfNonLiveVariables, 239 ConjunctsInSsa, 72 ConjunctsInUnsatCore, 17 InterpolantComputations, 2 PerfectInterpolantSequences, 48/252 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...