./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/nested_true-unreach-call1.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_cc6d9dd5-e4c0-4499-b0f0-fca601861572/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_cc6d9dd5-e4c0-4499-b0f0-fca601861572/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_cc6d9dd5-e4c0-4499-b0f0-fca601861572/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_cc6d9dd5-e4c0-4499-b0f0-fca601861572/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/nested_true-unreach-call1.i -s /tmp/vcloud-vcloud-master/worker/working_dir_cc6d9dd5-e4c0-4499-b0f0-fca601861572/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_cc6d9dd5-e4c0-4499-b0f0-fca601861572/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 a5caa00ae79e87f00b53813a39ed64b4be57c6c3 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 12:39:15,135 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 12:39:15,136 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 12:39:15,142 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 12:39:15,142 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 12:39:15,143 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 12:39:15,143 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 12:39:15,144 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 12:39:15,145 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 12:39:15,145 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 12:39:15,146 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 12:39:15,146 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 12:39:15,146 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 12:39:15,147 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 12:39:15,147 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 12:39:15,148 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 12:39:15,148 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 12:39:15,149 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 12:39:15,150 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 12:39:15,151 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 12:39:15,151 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 12:39:15,152 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 12:39:15,153 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 12:39:15,153 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 12:39:15,153 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 12:39:15,153 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 12:39:15,154 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 12:39:15,154 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 12:39:15,155 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 12:39:15,155 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 12:39:15,155 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 12:39:15,156 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 12:39:15,156 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 12:39:15,156 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 12:39:15,156 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 12:39:15,157 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 12:39:15,157 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_cc6d9dd5-e4c0-4499-b0f0-fca601861572/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-09 12:39:15,167 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 12:39:15,167 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 12:39:15,168 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 12:39:15,168 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 12:39:15,168 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 12:39:15,168 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 12:39:15,168 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 12:39:15,168 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 12:39:15,169 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 12:39:15,169 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 12:39:15,169 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 12:39:15,169 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 12:39:15,169 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 12:39:15,170 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 12:39:15,170 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 12:39:15,170 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 12:39:15,170 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 12:39:15,170 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 12:39:15,170 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 12:39:15,171 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 12:39:15,171 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 12:39:15,171 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 12:39:15,171 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 12:39:15,171 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 12:39:15,171 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 12:39:15,172 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 12:39:15,172 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 12:39:15,172 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 12:39:15,172 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 12:39:15,172 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 12:39:15,172 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 12:39:15,173 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 12:39:15,173 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 12:39:15,173 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 12:39:15,173 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 12:39:15,173 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-09 12:39:15,173 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_cc6d9dd5-e4c0-4499-b0f0-fca601861572/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 -> a5caa00ae79e87f00b53813a39ed64b4be57c6c3 [2018-12-09 12:39:15,197 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 12:39:15,204 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 12:39:15,206 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 12:39:15,207 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 12:39:15,207 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 12:39:15,208 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_cc6d9dd5-e4c0-4499-b0f0-fca601861572/bin-2019/utaipan/../../sv-benchmarks/c/loop-acceleration/nested_true-unreach-call1.i [2018-12-09 12:39:15,243 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cc6d9dd5-e4c0-4499-b0f0-fca601861572/bin-2019/utaipan/data/c81b0e5d3/e1ed3245af6d4577919385ce4b5479c6/FLAGe673af947 [2018-12-09 12:39:15,626 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 12:39:15,626 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_cc6d9dd5-e4c0-4499-b0f0-fca601861572/sv-benchmarks/c/loop-acceleration/nested_true-unreach-call1.i [2018-12-09 12:39:15,629 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cc6d9dd5-e4c0-4499-b0f0-fca601861572/bin-2019/utaipan/data/c81b0e5d3/e1ed3245af6d4577919385ce4b5479c6/FLAGe673af947 [2018-12-09 12:39:15,638 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_cc6d9dd5-e4c0-4499-b0f0-fca601861572/bin-2019/utaipan/data/c81b0e5d3/e1ed3245af6d4577919385ce4b5479c6 [2018-12-09 12:39:15,640 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 12:39:15,641 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 12:39:15,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 12:39:15,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 12:39:15,644 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 12:39:15,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:39:15" (1/1) ... [2018-12-09 12:39:15,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@753418dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:39:15, skipping insertion in model container [2018-12-09 12:39:15,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:39:15" (1/1) ... [2018-12-09 12:39:15,653 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 12:39:15,661 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 12:39:15,756 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 12:39:15,758 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 12:39:15,766 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 12:39:15,774 INFO L195 MainTranslator]: Completed translation [2018-12-09 12:39:15,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:39:15 WrapperNode [2018-12-09 12:39:15,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 12:39:15,775 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 12:39:15,775 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 12:39:15,775 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 12:39:15,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:39:15" (1/1) ... [2018-12-09 12:39:15,783 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:39:15" (1/1) ... [2018-12-09 12:39:15,786 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 12:39:15,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 12:39:15,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 12:39:15,787 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 12:39:15,794 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:39:15" (1/1) ... [2018-12-09 12:39:15,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:39:15" (1/1) ... [2018-12-09 12:39:15,795 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:39:15" (1/1) ... [2018-12-09 12:39:15,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:39:15" (1/1) ... [2018-12-09 12:39:15,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:39:15" (1/1) ... [2018-12-09 12:39:15,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:39:15" (1/1) ... [2018-12-09 12:39:15,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:39:15" (1/1) ... [2018-12-09 12:39:15,803 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 12:39:15,803 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 12:39:15,803 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 12:39:15,803 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 12:39:15,804 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:39:15" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cc6d9dd5-e4c0-4499-b0f0-fca601861572/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 12:39:15,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 12:39:15,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 12:39:15,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 12:39:15,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 12:39:15,866 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 12:39:15,866 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 12:39:15,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-09 12:39:15,866 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-09 12:39:15,954 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 12:39:15,954 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-09 12:39:15,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:39:15 BoogieIcfgContainer [2018-12-09 12:39:15,955 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 12:39:15,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 12:39:15,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 12:39:15,957 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 12:39:15,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 12:39:15" (1/3) ... [2018-12-09 12:39:15,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@733310eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:39:15, skipping insertion in model container [2018-12-09 12:39:15,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:39:15" (2/3) ... [2018-12-09 12:39:15,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@733310eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:39:15, skipping insertion in model container [2018-12-09 12:39:15,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:39:15" (3/3) ... [2018-12-09 12:39:15,959 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_true-unreach-call1.i [2018-12-09 12:39:15,964 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 12:39:15,968 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-09 12:39:15,976 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-09 12:39:15,994 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 12:39:15,994 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 12:39:15,994 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 12:39:15,995 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 12:39:15,995 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 12:39:15,995 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 12:39:15,995 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 12:39:15,995 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 12:39:16,004 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-12-09 12:39:16,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-09 12:39:16,007 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:39:16,008 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:39:16,009 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:39:16,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:39:16,012 INFO L82 PathProgramCache]: Analyzing trace with hash -873786703, now seen corresponding path program 1 times [2018-12-09 12:39:16,013 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 12:39:16,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:39:16,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:39:16,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:39:16,041 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 12:39:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:39:16,122 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 12:39:16,124 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 12:39:16,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 12:39:16,124 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 12:39:16,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 12:39:16,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 12:39:16,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 12:39:16,136 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2018-12-09 12:39:16,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:39:16,156 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2018-12-09 12:39:16,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 12:39:16,158 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-09 12:39:16,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:39:16,164 INFO L225 Difference]: With dead ends: 36 [2018-12-09 12:39:16,164 INFO L226 Difference]: Without dead ends: 16 [2018-12-09 12:39:16,166 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 12:39:16,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-12-09 12:39:16,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2018-12-09 12:39:16,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-09 12:39:16,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-12-09 12:39:16,190 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-12-09 12:39:16,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:39:16,190 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-12-09 12:39:16,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 12:39:16,190 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-12-09 12:39:16,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-09 12:39:16,191 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:39:16,191 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:39:16,191 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:39:16,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:39:16,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1621360120, now seen corresponding path program 1 times [2018-12-09 12:39:16,192 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 12:39:16,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:39:16,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:39:16,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:39:16,193 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 12:39:16,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:39:16,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:39:16,234 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 12:39:16,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 12:39:16,234 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 12:39:16,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 12:39:16,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 12:39:16,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 12:39:16,235 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2018-12-09 12:39:16,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:39:16,244 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2018-12-09 12:39:16,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 12:39:16,245 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-12-09 12:39:16,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:39:16,245 INFO L225 Difference]: With dead ends: 23 [2018-12-09 12:39:16,245 INFO L226 Difference]: Without dead ends: 15 [2018-12-09 12:39:16,246 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 12:39:16,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-12-09 12:39:16,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-12-09 12:39:16,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-12-09 12:39:16,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-12-09 12:39:16,248 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-12-09 12:39:16,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:39:16,248 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-12-09 12:39:16,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 12:39:16,248 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-12-09 12:39:16,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-09 12:39:16,249 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:39:16,249 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:39:16,249 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:39:16,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:39:16,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1574756514, now seen corresponding path program 1 times [2018-12-09 12:39:16,249 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 12:39:16,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:39:16,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:39:16,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:39:16,250 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 12:39:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:39:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:39:16,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:39:16,290 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 12:39:16,291 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 15 with the following transitions: [2018-12-09 12:39:16,292 INFO L205 CegarAbsIntRunner]: [0], [4], [11], [13], [20], [22], [26], [32], [35], [37], [43], [44], [45], [47] [2018-12-09 12:39:16,312 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 12:39:16,312 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 12:39:16,419 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 12:39:16,419 INFO L272 AbstractInterpreter]: Visited 14 different actions 32 times. Merged at 4 different actions 10 times. Widened at 2 different actions 2 times. Performed 104 root evaluator evaluations with a maximum evaluation depth of 12. Performed 104 inverse root evaluator evaluations with a maximum inverse evaluation depth of 12. Found 5 fixpoints after 3 different actions. Largest state had 4 variables. [2018-12-09 12:39:16,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:39:16,425 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 12:39:16,425 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:39:16,425 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cc6d9dd5-e4c0-4499-b0f0-fca601861572/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 12:39:16,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:39:16,431 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 12:39:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:39:16,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:39:16,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:39:16,485 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 12:39:16,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 12:39:16,535 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 12:39:16,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 9 [2018-12-09 12:39:16,535 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 12:39:16,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 12:39:16,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 12:39:16,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-12-09 12:39:16,536 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2018-12-09 12:39:16,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:39:16,584 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2018-12-09 12:39:16,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 12:39:16,584 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2018-12-09 12:39:16,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:39:16,584 INFO L225 Difference]: With dead ends: 34 [2018-12-09 12:39:16,585 INFO L226 Difference]: Without dead ends: 25 [2018-12-09 12:39:16,585 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-12-09 12:39:16,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-12-09 12:39:16,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2018-12-09 12:39:16,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-09 12:39:16,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-12-09 12:39:16,588 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 14 [2018-12-09 12:39:16,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:39:16,588 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-12-09 12:39:16,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 12:39:16,588 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-12-09 12:39:16,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-09 12:39:16,589 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:39:16,589 INFO L402 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:39:16,589 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:39:16,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:39:16,589 INFO L82 PathProgramCache]: Analyzing trace with hash 93409041, now seen corresponding path program 2 times [2018-12-09 12:39:16,589 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 12:39:16,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:39:16,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:39:16,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:39:16,590 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 12:39:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:39:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-09 12:39:16,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:39:16,638 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 12:39:16,638 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 12:39:16,638 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 12:39:16,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:39:16,638 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cc6d9dd5-e4c0-4499-b0f0-fca601861572/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 12:39:16,645 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 12:39:16,645 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 12:39:16,659 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-12-09 12:39:16,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 12:39:16,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:39:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 12:39:16,699 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 12:39:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-09 12:39:16,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 12:39:16,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 13 [2018-12-09 12:39:16,743 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 12:39:16,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-09 12:39:16,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-09 12:39:16,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-12-09 12:39:16,743 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 10 states. [2018-12-09 12:39:16,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:39:16,838 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2018-12-09 12:39:16,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-09 12:39:16,838 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-12-09 12:39:16,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:39:16,839 INFO L225 Difference]: With dead ends: 46 [2018-12-09 12:39:16,839 INFO L226 Difference]: Without dead ends: 34 [2018-12-09 12:39:16,839 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2018-12-09 12:39:16,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-09 12:39:16,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2018-12-09 12:39:16,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-09 12:39:16,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2018-12-09 12:39:16,843 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 20 [2018-12-09 12:39:16,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:39:16,844 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2018-12-09 12:39:16,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-09 12:39:16,844 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2018-12-09 12:39:16,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-09 12:39:16,844 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:39:16,844 INFO L402 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:39:16,844 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:39:16,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:39:16,845 INFO L82 PathProgramCache]: Analyzing trace with hash 50981508, now seen corresponding path program 3 times [2018-12-09 12:39:16,845 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 12:39:16,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:39:16,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 12:39:16,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:39:16,845 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 12:39:16,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:39:16,887 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-12-09 12:39:16,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:39:16,887 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 12:39:16,887 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 12:39:16,888 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 12:39:16,888 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:39:16,888 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cc6d9dd5-e4c0-4499-b0f0-fca601861572/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 12:39:16,897 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 12:39:16,897 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 12:39:16,906 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 12:39:16,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 12:39:16,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:39:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-09 12:39:16,972 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 12:39:17,019 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-09 12:39:17,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 12:39:17,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 6] total 17 [2018-12-09 12:39:17,034 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 12:39:17,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-09 12:39:17,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-09 12:39:17,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2018-12-09 12:39:17,034 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 13 states. [2018-12-09 12:39:17,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:39:17,225 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2018-12-09 12:39:17,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-12-09 12:39:17,225 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2018-12-09 12:39:17,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:39:17,226 INFO L225 Difference]: With dead ends: 64 [2018-12-09 12:39:17,226 INFO L226 Difference]: Without dead ends: 45 [2018-12-09 12:39:17,227 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2018-12-09 12:39:17,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-12-09 12:39:17,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2018-12-09 12:39:17,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-09 12:39:17,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2018-12-09 12:39:17,231 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 28 [2018-12-09 12:39:17,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:39:17,232 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2018-12-09 12:39:17,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-09 12:39:17,232 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2018-12-09 12:39:17,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-09 12:39:17,232 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:39:17,232 INFO L402 BasicCegarLoop]: trace histogram [16, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:39:17,233 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:39:17,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:39:17,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1027694321, now seen corresponding path program 4 times [2018-12-09 12:39:17,233 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 12:39:17,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:39:17,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 12:39:17,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:39:17,234 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 12:39:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:39:17,315 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-09 12:39:17,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:39:17,315 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 12:39:17,316 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 12:39:17,316 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 12:39:17,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:39:17,316 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cc6d9dd5-e4c0-4499-b0f0-fca601861572/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 12:39:17,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:39:17,322 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 12:39:17,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:39:17,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:39:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-12-09 12:39:17,378 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 12:39:17,436 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-09 12:39:17,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 12:39:17,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 7] total 17 [2018-12-09 12:39:17,453 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 12:39:17,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 12:39:17,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 12:39:17,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2018-12-09 12:39:17,454 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 12 states. [2018-12-09 12:39:17,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:39:17,532 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2018-12-09 12:39:17,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 12:39:17,532 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2018-12-09 12:39:17,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:39:17,533 INFO L225 Difference]: With dead ends: 57 [2018-12-09 12:39:17,533 INFO L226 Difference]: Without dead ends: 52 [2018-12-09 12:39:17,533 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2018-12-09 12:39:17,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-12-09 12:39:17,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2018-12-09 12:39:17,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-12-09 12:39:17,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2018-12-09 12:39:17,539 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 38 [2018-12-09 12:39:17,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:39:17,539 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2018-12-09 12:39:17,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 12:39:17,539 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2018-12-09 12:39:17,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-09 12:39:17,540 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:39:17,540 INFO L402 BasicCegarLoop]: trace histogram [20, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:39:17,540 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:39:17,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:39:17,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1398553544, now seen corresponding path program 5 times [2018-12-09 12:39:17,540 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 12:39:17,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:39:17,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:39:17,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:39:17,541 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 12:39:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:39:17,611 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-12-09 12:39:17,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:39:17,611 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 12:39:17,611 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 12:39:17,611 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 12:39:17,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:39:17,611 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cc6d9dd5-e4c0-4499-b0f0-fca601861572/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 12:39:17,619 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 12:39:17,619 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 12:39:17,650 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-12-09 12:39:17,650 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 12:39:17,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:39:17,711 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 109 proven. 10 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2018-12-09 12:39:17,712 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 12:39:17,774 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 109 proven. 10 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2018-12-09 12:39:17,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 12:39:17,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2018-12-09 12:39:17,788 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 12:39:17,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-09 12:39:17,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-09 12:39:17,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2018-12-09 12:39:17,789 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 13 states. [2018-12-09 12:39:18,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:39:18,142 INFO L93 Difference]: Finished difference Result 101 states and 120 transitions. [2018-12-09 12:39:18,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-12-09 12:39:18,142 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2018-12-09 12:39:18,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:39:18,143 INFO L225 Difference]: With dead ends: 101 [2018-12-09 12:39:18,143 INFO L226 Difference]: Without dead ends: 66 [2018-12-09 12:39:18,144 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=383, Invalid=1873, Unknown=0, NotChecked=0, Total=2256 [2018-12-09 12:39:18,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-12-09 12:39:18,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2018-12-09 12:39:18,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-09 12:39:18,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2018-12-09 12:39:18,150 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 45 [2018-12-09 12:39:18,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:39:18,150 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2018-12-09 12:39:18,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-09 12:39:18,150 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2018-12-09 12:39:18,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-12-09 12:39:18,151 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:39:18,151 INFO L402 BasicCegarLoop]: trace histogram [30, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:39:18,151 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:39:18,152 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:39:18,152 INFO L82 PathProgramCache]: Analyzing trace with hash -323381161, now seen corresponding path program 6 times [2018-12-09 12:39:18,152 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 12:39:18,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:39:18,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 12:39:18,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:39:18,153 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 12:39:18,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:39:18,231 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-12-09 12:39:18,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:39:18,231 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 12:39:18,231 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 12:39:18,232 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 12:39:18,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:39:18,232 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cc6d9dd5-e4c0-4499-b0f0-fca601861572/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 12:39:18,239 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 12:39:18,239 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 12:39:18,257 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 12:39:18,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 12:39:18,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:39:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 186 proven. 15 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2018-12-09 12:39:18,307 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 12:39:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 186 proven. 15 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2018-12-09 12:39:18,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 12:39:18,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2018-12-09 12:39:18,402 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 12:39:18,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-09 12:39:18,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-09 12:39:18,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2018-12-09 12:39:18,402 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 15 states. [2018-12-09 12:39:18,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:39:18,966 INFO L93 Difference]: Finished difference Result 129 states and 151 transitions. [2018-12-09 12:39:18,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-12-09 12:39:18,967 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2018-12-09 12:39:18,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:39:18,967 INFO L225 Difference]: With dead ends: 129 [2018-12-09 12:39:18,967 INFO L226 Difference]: Without dead ends: 82 [2018-12-09 12:39:18,968 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=565, Invalid=3341, Unknown=0, NotChecked=0, Total=3906 [2018-12-09 12:39:18,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-12-09 12:39:18,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2018-12-09 12:39:18,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-12-09 12:39:18,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2018-12-09 12:39:18,976 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 58 [2018-12-09 12:39:18,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:39:18,976 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2018-12-09 12:39:18,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-09 12:39:18,976 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2018-12-09 12:39:18,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-09 12:39:18,977 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:39:18,977 INFO L402 BasicCegarLoop]: trace histogram [42, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:39:18,977 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:39:18,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:39:18,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1645944296, now seen corresponding path program 7 times [2018-12-09 12:39:18,977 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 12:39:18,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:39:18,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 12:39:18,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:39:18,978 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 12:39:18,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:39:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1078 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2018-12-09 12:39:19,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:39:19,071 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 12:39:19,072 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 12:39:19,072 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 12:39:19,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:39:19,072 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cc6d9dd5-e4c0-4499-b0f0-fca601861572/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 12:39:19,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:39:19,080 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 12:39:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:39:19,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:39:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 301 proven. 21 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2018-12-09 12:39:19,174 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 12:39:19,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 301 proven. 21 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2018-12-09 12:39:19,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 12:39:19,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2018-12-09 12:39:19,312 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 12:39:19,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-09 12:39:19,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-09 12:39:19,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2018-12-09 12:39:19,312 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 17 states. [2018-12-09 12:39:20,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:39:20,041 INFO L93 Difference]: Finished difference Result 161 states and 186 transitions. [2018-12-09 12:39:20,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-12-09 12:39:20,041 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2018-12-09 12:39:20,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:39:20,042 INFO L225 Difference]: With dead ends: 161 [2018-12-09 12:39:20,042 INFO L226 Difference]: Without dead ends: 100 [2018-12-09 12:39:20,043 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=761, Invalid=5559, Unknown=0, NotChecked=0, Total=6320 [2018-12-09 12:39:20,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-12-09 12:39:20,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 91. [2018-12-09 12:39:20,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-12-09 12:39:20,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2018-12-09 12:39:20,052 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 73 [2018-12-09 12:39:20,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:39:20,052 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2018-12-09 12:39:20,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-09 12:39:20,052 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2018-12-09 12:39:20,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-12-09 12:39:20,053 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:39:20,053 INFO L402 BasicCegarLoop]: trace histogram [56, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:39:20,053 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:39:20,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:39:20,053 INFO L82 PathProgramCache]: Analyzing trace with hash -196329159, now seen corresponding path program 8 times [2018-12-09 12:39:20,053 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 12:39:20,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:39:20,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:39:20,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:39:20,054 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 12:39:20,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:39:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 1856 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2018-12-09 12:39:20,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:39:20,148 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 12:39:20,148 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 12:39:20,149 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 12:39:20,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:39:20,149 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cc6d9dd5-e4c0-4499-b0f0-fca601861572/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 12:39:20,154 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 12:39:20,155 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 12:39:20,256 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-12-09 12:39:20,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 12:39:20,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:39:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 463 proven. 28 refuted. 0 times theorem prover too weak. 1589 trivial. 0 not checked. [2018-12-09 12:39:20,334 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 12:39:20,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 463 proven. 28 refuted. 0 times theorem prover too weak. 1589 trivial. 0 not checked. [2018-12-09 12:39:20,469 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 12:39:20,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2018-12-09 12:39:20,469 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 12:39:20,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-09 12:39:20,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-09 12:39:20,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2018-12-09 12:39:20,470 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand 19 states. [2018-12-09 12:39:21,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:39:21,521 INFO L93 Difference]: Finished difference Result 197 states and 225 transitions. [2018-12-09 12:39:21,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-12-09 12:39:21,522 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 90 [2018-12-09 12:39:21,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:39:21,522 INFO L225 Difference]: With dead ends: 197 [2018-12-09 12:39:21,522 INFO L226 Difference]: Without dead ends: 120 [2018-12-09 12:39:21,523 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2597 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=965, Invalid=8737, Unknown=0, NotChecked=0, Total=9702 [2018-12-09 12:39:21,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-12-09 12:39:21,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 110. [2018-12-09 12:39:21,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-12-09 12:39:21,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 119 transitions. [2018-12-09 12:39:21,539 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 119 transitions. Word has length 90 [2018-12-09 12:39:21,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:39:21,539 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 119 transitions. [2018-12-09 12:39:21,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-09 12:39:21,539 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 119 transitions. [2018-12-09 12:39:21,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-12-09 12:39:21,540 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:39:21,541 INFO L402 BasicCegarLoop]: trace histogram [72, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:39:21,541 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:39:21,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:39:21,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1568752520, now seen corresponding path program 9 times [2018-12-09 12:39:21,541 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 12:39:21,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:39:21,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 12:39:21,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:39:21,542 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 12:39:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:39:21,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 2997 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2018-12-09 12:39:21,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:39:21,677 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 12:39:21,678 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 12:39:21,678 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 12:39:21,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:39:21,678 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cc6d9dd5-e4c0-4499-b0f0-fca601861572/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 12:39:21,686 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 12:39:21,686 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 12:39:21,712 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 12:39:21,712 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 12:39:21,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:39:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 657 proven. 36 refuted. 0 times theorem prover too weak. 2628 trivial. 0 not checked. [2018-12-09 12:39:21,796 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 12:39:21,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 657 proven. 36 refuted. 0 times theorem prover too weak. 2628 trivial. 0 not checked. [2018-12-09 12:39:21,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 12:39:21,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2018-12-09 12:39:21,958 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 12:39:21,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-09 12:39:21,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-09 12:39:21,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2018-12-09 12:39:21,958 INFO L87 Difference]: Start difference. First operand 110 states and 119 transitions. Second operand 21 states. [2018-12-09 12:39:23,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:39:23,336 INFO L93 Difference]: Finished difference Result 237 states and 268 transitions. [2018-12-09 12:39:23,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-12-09 12:39:23,336 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2018-12-09 12:39:23,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:39:23,337 INFO L225 Difference]: With dead ends: 237 [2018-12-09 12:39:23,337 INFO L226 Difference]: Without dead ends: 142 [2018-12-09 12:39:23,339 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4058 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1171, Invalid=13109, Unknown=0, NotChecked=0, Total=14280 [2018-12-09 12:39:23,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-12-09 12:39:23,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 131. [2018-12-09 12:39:23,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-12-09 12:39:23,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 141 transitions. [2018-12-09 12:39:23,349 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 141 transitions. Word has length 109 [2018-12-09 12:39:23,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:39:23,350 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 141 transitions. [2018-12-09 12:39:23,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-09 12:39:23,350 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 141 transitions. [2018-12-09 12:39:23,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-12-09 12:39:23,351 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:39:23,351 INFO L402 BasicCegarLoop]: trace histogram [90, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:39:23,351 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:39:23,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:39:23,351 INFO L82 PathProgramCache]: Analyzing trace with hash 342435995, now seen corresponding path program 10 times [2018-12-09 12:39:23,351 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 12:39:23,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:39:23,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 12:39:23,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:39:23,352 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 12:39:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:39:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 4600 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2018-12-09 12:39:23,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:39:23,478 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 12:39:23,478 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 12:39:23,478 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 12:39:23,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:39:23,478 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cc6d9dd5-e4c0-4499-b0f0-fca601861572/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 12:39:23,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:39:23,484 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 12:39:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:39:23,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:39:23,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 910 proven. 45 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2018-12-09 12:39:23,628 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 12:39:23,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 910 proven. 45 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2018-12-09 12:39:23,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 12:39:23,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2018-12-09 12:39:23,819 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 12:39:23,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-09 12:39:23,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-09 12:39:23,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2018-12-09 12:39:23,819 INFO L87 Difference]: Start difference. First operand 131 states and 141 transitions. Second operand 23 states. [2018-12-09 12:39:25,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:39:25,932 INFO L93 Difference]: Finished difference Result 281 states and 315 transitions. [2018-12-09 12:39:25,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-12-09 12:39:25,932 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 130 [2018-12-09 12:39:25,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:39:25,933 INFO L225 Difference]: With dead ends: 281 [2018-12-09 12:39:25,933 INFO L226 Difference]: Without dead ends: 166 [2018-12-09 12:39:25,936 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6060 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1373, Invalid=18933, Unknown=0, NotChecked=0, Total=20306 [2018-12-09 12:39:25,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-12-09 12:39:25,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 154. [2018-12-09 12:39:25,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-12-09 12:39:25,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 165 transitions. [2018-12-09 12:39:25,947 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 165 transitions. Word has length 130 [2018-12-09 12:39:25,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:39:25,948 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 165 transitions. [2018-12-09 12:39:25,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-09 12:39:25,948 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 165 transitions. [2018-12-09 12:39:25,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-12-09 12:39:25,948 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:39:25,949 INFO L402 BasicCegarLoop]: trace histogram [110, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:39:25,949 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:39:25,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:39:25,949 INFO L82 PathProgramCache]: Analyzing trace with hash -57777320, now seen corresponding path program 11 times [2018-12-09 12:39:25,949 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 12:39:25,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:39:25,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:39:25,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:39:25,950 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 12:39:25,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:39:26,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 6776 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2018-12-09 12:39:26,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:39:26,134 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 12:39:26,134 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 12:39:26,134 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 12:39:26,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:39:26,134 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cc6d9dd5-e4c0-4499-b0f0-fca601861572/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 12:39:26,140 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 12:39:26,140 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 12:39:39,017 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2018-12-09 12:39:39,017 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 12:39:39,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:39:53,553 WARN L180 SmtUtils]: Spent 8.17 s on a formula simplification. DAG size of input: 90 DAG size of output: 19 [2018-12-09 12:39:55,563 WARN L854 $PredicateComparison]: unable to prove that (exists ((v_prenex_2 Int)) (let ((.cse0 (mod v_prenex_2 2)) (.cse1 (mod v_prenex_2 4294967296))) (and (= .cse0 c___VERIFIER_assert_~cond) (<= 0 .cse1) (< (mod (+ v_prenex_2 4294967295) 4294967296) 268435455) (<= .cse0 2147483647) (<= 268435455 .cse1)))) is different from true [2018-12-09 12:39:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 1231 proven. 0 refuted. 0 times theorem prover too weak. 6150 trivial. 0 not checked. [2018-12-09 12:39:55,583 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 12:39:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 1231 proven. 0 refuted. 0 times theorem prover too weak. 6150 trivial. 0 not checked. [2018-12-09 12:39:59,536 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-09 12:39:59,537 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [14] total 24 [2018-12-09 12:39:59,537 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 12:39:59,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 12:39:59,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 12:39:59,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=4, NotChecked=42, Total=552 [2018-12-09 12:39:59,537 INFO L87 Difference]: Start difference. First operand 154 states and 165 transitions. Second operand 7 states. [2018-12-09 12:40:04,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:40:04,661 INFO L93 Difference]: Finished difference Result 154 states and 165 transitions. [2018-12-09 12:40:04,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 12:40:04,662 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 153 [2018-12-09 12:40:04,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:40:04,662 INFO L225 Difference]: With dead ends: 154 [2018-12-09 12:40:04,662 INFO L226 Difference]: Without dead ends: 0 [2018-12-09 12:40:04,663 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=136, Invalid=462, Unknown=6, NotChecked=46, Total=650 [2018-12-09 12:40:04,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-09 12:40:04,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-09 12:40:04,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-09 12:40:04,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-09 12:40:04,663 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 153 [2018-12-09 12:40:04,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:40:04,664 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 12:40:04,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 12:40:04,664 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-09 12:40:04,664 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-09 12:40:04,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-09 12:40:04,773 WARN L180 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 16 [2018-12-09 12:40:04,824 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-09 12:40:04,824 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-09 12:40:04,824 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-09 12:40:04,824 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-09 12:40:04,824 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-09 12:40:04,824 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-09 12:40:04,825 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 8 19) no Hoare annotation was computed. [2018-12-09 12:40:04,825 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 8 19) no Hoare annotation was computed. [2018-12-09 12:40:04,825 INFO L444 ceAbstractionStarter]: At program point L13-2(lines 13 15) the Hoare annotation is: (or (and (<= main_~x~0 0) (<= 0 main_~x~0)) (and (< (mod (+ main_~x~0 4294967295) 4294967296) 268435455) (< (mod main_~x~0 4294967296) 268435455))) [2018-12-09 12:40:04,825 INFO L448 ceAbstractionStarter]: For program point L13-3(lines 13 15) no Hoare annotation was computed. [2018-12-09 12:40:04,825 INFO L444 ceAbstractionStarter]: At program point L11-2(lines 11 17) the Hoare annotation is: (or (< (mod (+ main_~x~0 4294967295) 4294967296) 268435455) (and (<= 0 main_~y~0) (<= main_~x~0 0) (<= 0 main_~x~0) (<= main_~y~0 0))) [2018-12-09 12:40:04,825 INFO L444 ceAbstractionStarter]: At program point L11-3(lines 11 17) the Hoare annotation is: (and (< (mod (+ main_~x~0 4294967295) 4294967296) 268435455) (<= 268435455 (mod main_~x~0 4294967296))) [2018-12-09 12:40:04,825 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 8 19) the Hoare annotation is: true [2018-12-09 12:40:04,825 INFO L448 ceAbstractionStarter]: For program point L3-2(lines 2 7) no Hoare annotation was computed. [2018-12-09 12:40:04,825 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 2 7) the Hoare annotation is: true [2018-12-09 12:40:04,825 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 2 7) no Hoare annotation was computed. [2018-12-09 12:40:04,825 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2018-12-09 12:40:04,825 INFO L448 ceAbstractionStarter]: For program point L4(line 4) no Hoare annotation was computed. [2018-12-09 12:40:04,825 INFO L448 ceAbstractionStarter]: For program point L3(lines 3 5) no Hoare annotation was computed. [2018-12-09 12:40:04,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 12:40:04 BoogieIcfgContainer [2018-12-09 12:40:04,833 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 12:40:04,833 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 12:40:04,833 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 12:40:04,834 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 12:40:04,834 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:39:15" (3/4) ... [2018-12-09 12:40:04,836 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-09 12:40:04,839 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-09 12:40:04,840 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-09 12:40:04,840 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-12-09 12:40:04,842 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-12-09 12:40:04,842 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2018-12-09 12:40:04,842 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-09 12:40:04,865 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_cc6d9dd5-e4c0-4499-b0f0-fca601861572/bin-2019/utaipan/witness.graphml [2018-12-09 12:40:04,865 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 12:40:04,866 INFO L168 Benchmark]: Toolchain (without parser) took 49225.55 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 386.9 MB). Free memory was 954.4 MB in the beginning and 1.1 GB in the end (delta: -172.6 MB). Peak memory consumption was 214.3 MB. Max. memory is 11.5 GB. [2018-12-09 12:40:04,866 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 12:40:04,866 INFO L168 Benchmark]: CACSL2BoogieTranslator took 133.54 ms. Allocated memory is still 1.0 GB. Free memory was 954.4 MB in the beginning and 943.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 12:40:04,867 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.49 ms. Allocated memory is still 1.0 GB. Free memory is still 943.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 12:40:04,867 INFO L168 Benchmark]: Boogie Preprocessor took 16.44 ms. Allocated memory is still 1.0 GB. Free memory is still 943.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 12:40:04,867 INFO L168 Benchmark]: RCFGBuilder took 151.57 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 89.1 MB). Free memory was 943.6 MB in the beginning and 1.1 GB in the end (delta: -128.4 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. [2018-12-09 12:40:04,867 INFO L168 Benchmark]: TraceAbstraction took 48877.97 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 297.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -67.1 MB). Peak memory consumption was 230.7 MB. Max. memory is 11.5 GB. [2018-12-09 12:40:04,867 INFO L168 Benchmark]: Witness Printer took 31.77 ms. Allocated memory is still 1.4 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2018-12-09 12:40:04,869 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 133.54 ms. Allocated memory is still 1.0 GB. Free memory was 954.4 MB in the beginning and 943.6 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 11.49 ms. Allocated memory is still 1.0 GB. Free memory is still 943.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.44 ms. Allocated memory is still 1.0 GB. Free memory is still 943.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 151.57 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 89.1 MB). Free memory was 943.6 MB in the beginning and 1.1 GB in the end (delta: -128.4 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 48877.97 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 297.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -67.1 MB). Peak memory consumption was 230.7 MB. Max. memory is 11.5 GB. * Witness Printer took 31.77 ms. Allocated memory is still 1.4 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: 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: 13]: Loop Invariant Derived loop invariant: (x <= 0 && 0 <= x) || ((x + 4294967295) % 4294967296 < 268435455 && x % 4294967296 < 268435455) - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: (x + 4294967295) % 4294967296 < 268435455 || (((0 <= y && x <= 0) && 0 <= x) && y <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. SAFE Result, 48.8s OverallTime, 13 OverallIterations, 110 TraceHistogramMax, 11.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 204 SDtfs, 185 SDslu, 1380 SDs, 0 SdLazy, 7949 SolverSat, 517 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2049 GetRequests, 1401 SyntacticMatches, 10 SemanticMatches, 638 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 15947 ImplicationChecksByTransitivity, 31.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=154occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 80 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 20 PreInvPairs, 154 NumberOfFragments, 60 HoareAnnotationTreeSize, 20 FomulaSimplifications, 116628 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 19 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 13.2s SatisfiabilityAnalysisTime, 22.9s InterpolantComputationTime, 1539 NumberOfCodeBlocks, 1344 NumberOfCodeBlocksAsserted, 59 NumberOfCheckSat, 2262 ConstructedInterpolants, 2 QuantifiedInterpolants, 715372 SizeOfPredicates, 17 NumberOfNonLiveVariables, 1476 ConjunctsInSsa, 166 ConjunctsInUnsatCore, 35 InterpolantComputations, 4 PerfectInterpolantSequences, 41913/61051 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...