./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/sum03_false-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_3d0eebd8-b350-4de3-b5e6-1ddec2c94541/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_3d0eebd8-b350-4de3-b5e6-1ddec2c94541/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_3d0eebd8-b350-4de3-b5e6-1ddec2c94541/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_3d0eebd8-b350-4de3-b5e6-1ddec2c94541/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/sum03_false-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_3d0eebd8-b350-4de3-b5e6-1ddec2c94541/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_3d0eebd8-b350-4de3-b5e6-1ddec2c94541/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 a5bec83c84f47b7653d49cdbe6bc7857a2bc0080 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-08 18:41:03,058 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 18:41:03,059 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 18:41:03,066 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 18:41:03,066 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 18:41:03,067 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 18:41:03,067 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 18:41:03,068 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 18:41:03,069 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 18:41:03,069 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 18:41:03,070 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 18:41:03,070 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 18:41:03,070 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 18:41:03,071 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 18:41:03,071 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 18:41:03,071 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 18:41:03,072 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 18:41:03,073 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 18:41:03,074 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 18:41:03,075 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 18:41:03,075 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 18:41:03,076 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 18:41:03,077 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 18:41:03,077 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 18:41:03,077 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 18:41:03,077 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 18:41:03,078 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 18:41:03,078 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 18:41:03,079 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 18:41:03,079 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 18:41:03,079 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 18:41:03,079 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 18:41:03,080 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 18:41:03,080 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 18:41:03,080 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 18:41:03,080 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 18:41:03,081 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_3d0eebd8-b350-4de3-b5e6-1ddec2c94541/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-08 18:41:03,087 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 18:41:03,087 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 18:41:03,088 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 18:41:03,088 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 18:41:03,088 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-08 18:41:03,088 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-08 18:41:03,088 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-08 18:41:03,088 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-08 18:41:03,089 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-08 18:41:03,089 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-08 18:41:03,089 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-08 18:41:03,089 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-08 18:41:03,089 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-08 18:41:03,090 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 18:41:03,090 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 18:41:03,090 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 18:41:03,090 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 18:41:03,090 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 18:41:03,091 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-08 18:41:03,091 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 18:41:03,091 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-08 18:41:03,091 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 18:41:03,091 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 18:41:03,091 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-08 18:41:03,092 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 18:41:03,092 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 18:41:03,092 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 18:41:03,092 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 18:41:03,092 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 18:41:03,092 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 18:41:03,092 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 18:41:03,092 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-08 18:41:03,092 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-08 18:41:03,092 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 18:41:03,093 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 18:41:03,093 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-08 18:41:03,093 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_3d0eebd8-b350-4de3-b5e6-1ddec2c94541/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 -> a5bec83c84f47b7653d49cdbe6bc7857a2bc0080 [2018-12-08 18:41:03,111 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 18:41:03,118 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 18:41:03,120 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 18:41:03,121 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 18:41:03,121 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 18:41:03,121 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_3d0eebd8-b350-4de3-b5e6-1ddec2c94541/bin-2019/utaipan/../../sv-benchmarks/c/loops/sum03_false-unreach-call_true-termination.i [2018-12-08 18:41:03,155 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3d0eebd8-b350-4de3-b5e6-1ddec2c94541/bin-2019/utaipan/data/b92bba281/38b54d9ecdcf48769be563110ebd9460/FLAG207fc63fd [2018-12-08 18:41:03,561 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 18:41:03,562 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_3d0eebd8-b350-4de3-b5e6-1ddec2c94541/sv-benchmarks/c/loops/sum03_false-unreach-call_true-termination.i [2018-12-08 18:41:03,565 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3d0eebd8-b350-4de3-b5e6-1ddec2c94541/bin-2019/utaipan/data/b92bba281/38b54d9ecdcf48769be563110ebd9460/FLAG207fc63fd [2018-12-08 18:41:03,573 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_3d0eebd8-b350-4de3-b5e6-1ddec2c94541/bin-2019/utaipan/data/b92bba281/38b54d9ecdcf48769be563110ebd9460 [2018-12-08 18:41:03,575 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 18:41:03,575 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 18:41:03,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 18:41:03,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 18:41:03,578 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 18:41:03,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 06:41:03" (1/1) ... [2018-12-08 18:41:03,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16b4367c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:41:03, skipping insertion in model container [2018-12-08 18:41:03,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 06:41:03" (1/1) ... [2018-12-08 18:41:03,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 18:41:03,594 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 18:41:03,676 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 18:41:03,679 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 18:41:03,687 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 18:41:03,695 INFO L195 MainTranslator]: Completed translation [2018-12-08 18:41:03,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:41:03 WrapperNode [2018-12-08 18:41:03,695 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 18:41:03,696 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 18:41:03,696 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 18:41:03,696 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 18:41:03,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:41:03" (1/1) ... [2018-12-08 18:41:03,703 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:41:03" (1/1) ... [2018-12-08 18:41:03,706 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 18:41:03,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 18:41:03,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 18:41:03,707 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 18:41:03,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:41:03" (1/1) ... [2018-12-08 18:41:03,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:41:03" (1/1) ... [2018-12-08 18:41:03,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:41:03" (1/1) ... [2018-12-08 18:41:03,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:41:03" (1/1) ... [2018-12-08 18:41:03,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:41:03" (1/1) ... [2018-12-08 18:41:03,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:41:03" (1/1) ... [2018-12-08 18:41:03,717 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:41:03" (1/1) ... [2018-12-08 18:41:03,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 18:41:03,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 18:41:03,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 18:41:03,718 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 18:41:03,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:41:03" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3d0eebd8-b350-4de3-b5e6-1ddec2c94541/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 [2018-12-08 18:41:03,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 18:41:03,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 18:41:03,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 18:41:03,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 18:41:03,779 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 18:41:03,779 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 18:41:03,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-08 18:41:03,779 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-08 18:41:03,861 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 18:41:03,862 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-08 18:41:03,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 06:41:03 BoogieIcfgContainer [2018-12-08 18:41:03,862 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 18:41:03,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 18:41:03,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 18:41:03,864 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 18:41:03,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 06:41:03" (1/3) ... [2018-12-08 18:41:03,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd0fa34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 06:41:03, skipping insertion in model container [2018-12-08 18:41:03,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:41:03" (2/3) ... [2018-12-08 18:41:03,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd0fa34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 06:41:03, skipping insertion in model container [2018-12-08 18:41:03,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 06:41:03" (3/3) ... [2018-12-08 18:41:03,866 INFO L112 eAbstractionObserver]: Analyzing ICFG sum03_false-unreach-call_true-termination.i [2018-12-08 18:41:03,872 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 18:41:03,876 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-08 18:41:03,885 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-08 18:41:03,902 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 18:41:03,903 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-08 18:41:03,903 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 18:41:03,903 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 18:41:03,903 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 18:41:03,903 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 18:41:03,903 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 18:41:03,903 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 18:41:03,913 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-12-08 18:41:03,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-08 18:41:03,916 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:41:03,916 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:41:03,917 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:41:03,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:41:03,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1345568573, now seen corresponding path program 1 times [2018-12-08 18:41:03,922 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 18:41:03,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:41:03,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:41:03,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:41:03,951 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 18:41:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:41:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 18:41:04,069 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 18:41:04,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-08 18:41:04,069 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 18:41:04,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 18:41:04,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 18:41:04,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-08 18:41:04,081 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 6 states. [2018-12-08 18:41:04,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:41:04,140 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2018-12-08 18:41:04,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 18:41:04,141 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2018-12-08 18:41:04,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:41:04,146 INFO L225 Difference]: With dead ends: 38 [2018-12-08 18:41:04,146 INFO L226 Difference]: Without dead ends: 24 [2018-12-08 18:41:04,148 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-12-08 18:41:04,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-08 18:41:04,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-12-08 18:41:04,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-08 18:41:04,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-12-08 18:41:04,170 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 12 [2018-12-08 18:41:04,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:41:04,171 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-12-08 18:41:04,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 18:41:04,171 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-12-08 18:41:04,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-08 18:41:04,171 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:41:04,171 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:41:04,171 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:41:04,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:41:04,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1402826875, now seen corresponding path program 1 times [2018-12-08 18:41:04,172 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 18:41:04,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:41:04,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:41:04,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:41:04,173 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 18:41:04,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:41:04,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 18:41:04,209 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 18:41:04,209 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 18:41:04,210 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 18:41:04,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 18:41:04,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 18:41:04,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 18:41:04,211 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2018-12-08 18:41:04,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:41:04,231 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2018-12-08 18:41:04,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 18:41:04,231 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2018-12-08 18:41:04,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:41:04,233 INFO L225 Difference]: With dead ends: 35 [2018-12-08 18:41:04,233 INFO L226 Difference]: Without dead ends: 33 [2018-12-08 18:41:04,234 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-08 18:41:04,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-08 18:41:04,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-12-08 18:41:04,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-08 18:41:04,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2018-12-08 18:41:04,240 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 12 [2018-12-08 18:41:04,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:41:04,240 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2018-12-08 18:41:04,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 18:41:04,240 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2018-12-08 18:41:04,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-08 18:41:04,241 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:41:04,241 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:41:04,241 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:41:04,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:41:04,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1436486517, now seen corresponding path program 1 times [2018-12-08 18:41:04,242 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 18:41:04,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:41:04,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:41:04,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:41:04,243 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 18:41:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:41:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 18:41:04,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:41:04,298 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 18:41:04,299 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 21 with the following transitions: [2018-12-08 18:41:04,300 INFO L205 CegarAbsIntRunner]: [0], [4], [13], [16], [18], [20], [26], [29], [31], [34], [36], [37], [38], [39], [41], [42] [2018-12-08 18:41:04,322 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 18:41:04,322 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 18:41:04,423 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 18:41:04,424 INFO L272 AbstractInterpreter]: Visited 16 different actions 36 times. Merged at 4 different actions 8 times. Never widened. Performed 64 root evaluator evaluations with a maximum evaluation depth of 7. Performed 64 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Found 2 fixpoints after 2 different actions. Largest state had 7 variables. [2018-12-08 18:41:04,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:41:04,429 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 18:41:04,430 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:41:04,430 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3d0eebd8-b350-4de3-b5e6-1ddec2c94541/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 [2018-12-08 18:41:04,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:41:04,436 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 18:41:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:41:04,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:41:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 18:41:04,467 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 18:41:04,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 18:41:04,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 18:41:04,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2018-12-08 18:41:04,499 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 18:41:04,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 18:41:04,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 18:41:04,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-08 18:41:04,499 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 5 states. [2018-12-08 18:41:04,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:41:04,514 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2018-12-08 18:41:04,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-08 18:41:04,515 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-12-08 18:41:04,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:41:04,515 INFO L225 Difference]: With dead ends: 48 [2018-12-08 18:41:04,515 INFO L226 Difference]: Without dead ends: 30 [2018-12-08 18:41:04,516 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-08 18:41:04,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-08 18:41:04,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-12-08 18:41:04,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-08 18:41:04,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2018-12-08 18:41:04,520 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 20 [2018-12-08 18:41:04,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:41:04,521 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2018-12-08 18:41:04,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 18:41:04,521 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2018-12-08 18:41:04,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-08 18:41:04,522 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:41:04,522 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:41:04,523 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:41:04,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:41:04,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1136980881, now seen corresponding path program 2 times [2018-12-08 18:41:04,523 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 18:41:04,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:41:04,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:41:04,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:41:04,524 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 18:41:04,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:41:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-08 18:41:04,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:41:04,581 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 18:41:04,581 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 18:41:04,581 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 18:41:04,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:41:04,581 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3d0eebd8-b350-4de3-b5e6-1ddec2c94541/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 [2018-12-08 18:41:04,587 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 18:41:04,587 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 18:41:16,613 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-08 18:41:16,613 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:41:16,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:41:16,634 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-08 18:41:16,634 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 18:41:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-08 18:41:16,679 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 18:41:16,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 10 [2018-12-08 18:41:16,679 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 18:41:16,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-08 18:41:16,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-08 18:41:16,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2018-12-08 18:41:16,680 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 7 states. [2018-12-08 18:41:16,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:41:16,702 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2018-12-08 18:41:16,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 18:41:16,702 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2018-12-08 18:41:16,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:41:16,703 INFO L225 Difference]: With dead ends: 44 [2018-12-08 18:41:16,703 INFO L226 Difference]: Without dead ends: 34 [2018-12-08 18:41:16,704 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2018-12-08 18:41:16,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-08 18:41:16,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-12-08 18:41:16,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-08 18:41:16,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2018-12-08 18:41:16,710 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 28 [2018-12-08 18:41:16,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:41:16,710 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2018-12-08 18:41:16,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-08 18:41:16,710 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2018-12-08 18:41:16,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-12-08 18:41:16,711 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:41:16,711 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:41:16,711 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:41:16,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:41:16,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1851034775, now seen corresponding path program 3 times [2018-12-08 18:41:16,711 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 18:41:16,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:41:16,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:41:16,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:41:16,712 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 18:41:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:41:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-08 18:41:16,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:41:16,776 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 18:41:16,776 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 18:41:16,776 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 18:41:16,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:41:16,776 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3d0eebd8-b350-4de3-b5e6-1ddec2c94541/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 [2018-12-08 18:41:16,782 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 18:41:16,782 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-08 18:41:16,792 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 18:41:16,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:41:16,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:41:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-08 18:41:16,807 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 18:41:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-08 18:41:16,886 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 18:41:16,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2018-12-08 18:41:16,886 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 18:41:16,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-08 18:41:16,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-08 18:41:16,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-08 18:41:16,887 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2018-12-08 18:41:16,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:41:16,920 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2018-12-08 18:41:16,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 18:41:16,920 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2018-12-08 18:41:16,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:41:16,920 INFO L225 Difference]: With dead ends: 48 [2018-12-08 18:41:16,921 INFO L226 Difference]: Without dead ends: 38 [2018-12-08 18:41:16,921 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-08 18:41:16,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-08 18:41:16,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-12-08 18:41:16,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-08 18:41:16,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2018-12-08 18:41:16,925 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 36 [2018-12-08 18:41:16,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:41:16,925 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2018-12-08 18:41:16,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-08 18:41:16,925 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2018-12-08 18:41:16,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-12-08 18:41:16,926 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:41:16,926 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:41:16,926 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:41:16,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:41:16,926 INFO L82 PathProgramCache]: Analyzing trace with hash 103432291, now seen corresponding path program 4 times [2018-12-08 18:41:16,926 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 18:41:16,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:41:16,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:41:16,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:41:16,927 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 18:41:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:41:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-12-08 18:41:17,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:41:17,004 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 18:41:17,004 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 18:41:17,004 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 18:41:17,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:41:17,004 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3d0eebd8-b350-4de3-b5e6-1ddec2c94541/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 [2018-12-08 18:41:17,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:41:17,011 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 18:41:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:41:17,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:41:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-12-08 18:41:17,053 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 18:41:17,125 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-12-08 18:41:17,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 18:41:17,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2018-12-08 18:41:17,140 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 18:41:17,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-08 18:41:17,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-08 18:41:17,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2018-12-08 18:41:17,141 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 8 states. [2018-12-08 18:41:17,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:41:17,185 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2018-12-08 18:41:17,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 18:41:17,186 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2018-12-08 18:41:17,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:41:17,186 INFO L225 Difference]: With dead ends: 52 [2018-12-08 18:41:17,186 INFO L226 Difference]: Without dead ends: 42 [2018-12-08 18:41:17,187 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2018-12-08 18:41:17,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-08 18:41:17,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-12-08 18:41:17,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-08 18:41:17,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2018-12-08 18:41:17,190 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 44 [2018-12-08 18:41:17,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:41:17,190 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2018-12-08 18:41:17,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-08 18:41:17,191 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2018-12-08 18:41:17,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-12-08 18:41:17,191 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:41:17,191 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:41:17,191 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:41:17,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:41:17,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1878094685, now seen corresponding path program 5 times [2018-12-08 18:41:17,192 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 18:41:17,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:41:17,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:41:17,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:41:17,192 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 18:41:17,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:41:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 50 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-08 18:41:17,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:41:17,258 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 18:41:17,259 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 18:41:17,259 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 18:41:17,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:41:17,259 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3d0eebd8-b350-4de3-b5e6-1ddec2c94541/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 [2018-12-08 18:41:17,264 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 18:41:17,264 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 18:42:05,568 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-08 18:42:05,568 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:42:05,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:42:05,615 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 50 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-08 18:42:05,615 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 18:42:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 50 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-08 18:42:05,695 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 18:42:05,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2018-12-08 18:42:05,695 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 18:42:05,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 18:42:05,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 18:42:05,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2018-12-08 18:42:05,696 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 9 states. [2018-12-08 18:42:05,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:42:05,752 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2018-12-08 18:42:05,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-08 18:42:05,752 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2018-12-08 18:42:05,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:42:05,753 INFO L225 Difference]: With dead ends: 56 [2018-12-08 18:42:05,753 INFO L226 Difference]: Without dead ends: 46 [2018-12-08 18:42:05,753 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2018-12-08 18:42:05,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-12-08 18:42:05,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2018-12-08 18:42:05,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-12-08 18:42:05,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2018-12-08 18:42:05,757 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 52 [2018-12-08 18:42:05,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:42:05,757 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2018-12-08 18:42:05,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 18:42:05,757 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2018-12-08 18:42:05,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-12-08 18:42:05,758 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:42:05,758 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:42:05,758 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:42:05,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:42:05,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1262160983, now seen corresponding path program 6 times [2018-12-08 18:42:05,758 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 18:42:05,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:42:05,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:42:05,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:42:05,759 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 18:42:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:42:05,841 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 24 proven. 72 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-12-08 18:42:05,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:42:05,841 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 18:42:05,841 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 18:42:05,841 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 18:42:05,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:42:05,841 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3d0eebd8-b350-4de3-b5e6-1ddec2c94541/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 [2018-12-08 18:42:05,848 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 18:42:05,848 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-08 18:42:05,859 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 18:42:05,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:42:05,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:42:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 24 proven. 72 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-12-08 18:42:05,884 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 18:42:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 24 proven. 72 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-12-08 18:42:05,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 18:42:05,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2018-12-08 18:42:05,998 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 18:42:05,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-08 18:42:05,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-08 18:42:05,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2018-12-08 18:42:05,998 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 10 states. [2018-12-08 18:42:06,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:42:06,069 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2018-12-08 18:42:06,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-08 18:42:06,069 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2018-12-08 18:42:06,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:42:06,070 INFO L225 Difference]: With dead ends: 60 [2018-12-08 18:42:06,070 INFO L226 Difference]: Without dead ends: 50 [2018-12-08 18:42:06,071 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2018-12-08 18:42:06,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-12-08 18:42:06,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-12-08 18:42:06,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-12-08 18:42:06,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2018-12-08 18:42:06,074 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 60 [2018-12-08 18:42:06,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:42:06,075 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2018-12-08 18:42:06,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-08 18:42:06,075 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2018-12-08 18:42:06,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-12-08 18:42:06,076 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:42:06,076 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:42:06,076 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:42:06,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:42:06,076 INFO L82 PathProgramCache]: Analyzing trace with hash 977341265, now seen corresponding path program 7 times [2018-12-08 18:42:06,076 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 18:42:06,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:42:06,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:42:06,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:42:06,077 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 18:42:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:42:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 28 proven. 98 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-12-08 18:42:06,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:42:06,173 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 18:42:06,173 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 18:42:06,173 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 18:42:06,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:42:06,173 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3d0eebd8-b350-4de3-b5e6-1ddec2c94541/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 [2018-12-08 18:42:06,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:42:06,179 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 18:42:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:42:06,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:42:06,216 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 28 proven. 98 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-12-08 18:42:06,216 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 18:42:06,309 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 28 proven. 98 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-12-08 18:42:06,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 18:42:06,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2018-12-08 18:42:06,325 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 18:42:06,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-08 18:42:06,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-08 18:42:06,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2018-12-08 18:42:06,326 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 11 states. [2018-12-08 18:42:06,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:42:06,407 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2018-12-08 18:42:06,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-08 18:42:06,407 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2018-12-08 18:42:06,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:42:06,408 INFO L225 Difference]: With dead ends: 64 [2018-12-08 18:42:06,408 INFO L226 Difference]: Without dead ends: 54 [2018-12-08 18:42:06,409 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2018-12-08 18:42:06,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-12-08 18:42:06,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2018-12-08 18:42:06,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-12-08 18:42:06,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2018-12-08 18:42:06,413 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 68 [2018-12-08 18:42:06,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:42:06,413 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2018-12-08 18:42:06,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-08 18:42:06,413 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2018-12-08 18:42:06,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-12-08 18:42:06,414 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:42:06,414 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:42:06,414 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:42:06,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:42:06,414 INFO L82 PathProgramCache]: Analyzing trace with hash 87912523, now seen corresponding path program 8 times [2018-12-08 18:42:06,414 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 18:42:06,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:42:06,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:42:06,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:42:06,415 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 18:42:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:42:06,515 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 32 proven. 128 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-12-08 18:42:06,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:42:06,515 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 18:42:06,516 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 18:42:06,516 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 18:42:06,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:42:06,516 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3d0eebd8-b350-4de3-b5e6-1ddec2c94541/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 [2018-12-08 18:42:06,525 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 18:42:06,525 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 18:43:33,880 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-08 18:43:33,880 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:43:33,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:43:33,963 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 32 proven. 128 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-12-08 18:43:33,963 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 18:43:34,088 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 32 proven. 128 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-12-08 18:43:34,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 18:43:34,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2018-12-08 18:43:34,092 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 18:43:34,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-08 18:43:34,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-08 18:43:34,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2018-12-08 18:43:34,093 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 12 states. [2018-12-08 18:43:34,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:43:34,194 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2018-12-08 18:43:34,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-08 18:43:34,195 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 76 [2018-12-08 18:43:34,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:43:34,195 INFO L225 Difference]: With dead ends: 68 [2018-12-08 18:43:34,195 INFO L226 Difference]: Without dead ends: 58 [2018-12-08 18:43:34,196 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2018-12-08 18:43:34,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-08 18:43:34,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2018-12-08 18:43:34,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-12-08 18:43:34,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2018-12-08 18:43:34,200 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 76 [2018-12-08 18:43:34,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:43:34,200 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2018-12-08 18:43:34,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-08 18:43:34,200 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2018-12-08 18:43:34,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-12-08 18:43:34,201 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:43:34,201 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:43:34,201 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:43:34,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:43:34,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1704314043, now seen corresponding path program 9 times [2018-12-08 18:43:34,201 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 18:43:34,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:43:34,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:43:34,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:43:34,202 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 18:43:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:43:34,314 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 36 proven. 162 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2018-12-08 18:43:34,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:43:34,314 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 18:43:34,314 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 18:43:34,314 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 18:43:34,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:43:34,314 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3d0eebd8-b350-4de3-b5e6-1ddec2c94541/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 [2018-12-08 18:43:34,321 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 18:43:34,321 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-08 18:43:34,335 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 18:43:34,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:43:34,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:43:34,362 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 36 proven. 162 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2018-12-08 18:43:34,362 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 18:43:34,509 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 36 proven. 162 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2018-12-08 18:43:34,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 18:43:34,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2018-12-08 18:43:34,524 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 18:43:34,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-08 18:43:34,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-08 18:43:34,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2018-12-08 18:43:34,525 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 13 states. [2018-12-08 18:43:34,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:43:34,628 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2018-12-08 18:43:34,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-08 18:43:34,629 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 84 [2018-12-08 18:43:34,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:43:34,629 INFO L225 Difference]: With dead ends: 72 [2018-12-08 18:43:34,629 INFO L226 Difference]: Without dead ends: 62 [2018-12-08 18:43:34,630 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2018-12-08 18:43:34,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-12-08 18:43:34,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2018-12-08 18:43:34,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-12-08 18:43:34,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2018-12-08 18:43:34,634 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 84 [2018-12-08 18:43:34,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:43:34,634 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2018-12-08 18:43:34,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-08 18:43:34,634 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2018-12-08 18:43:34,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-12-08 18:43:34,635 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:43:34,635 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:43:34,635 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:43:34,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:43:34,635 INFO L82 PathProgramCache]: Analyzing trace with hash 234974271, now seen corresponding path program 10 times [2018-12-08 18:43:34,635 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 18:43:34,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:43:34,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:43:34,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:43:34,636 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 18:43:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 18:43:34,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 18:43:34,683 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-08 18:43:34,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 06:43:34 BoogieIcfgContainer [2018-12-08 18:43:34,704 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 18:43:34,704 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 18:43:34,704 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 18:43:34,705 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 18:43:34,705 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 06:41:03" (3/4) ... [2018-12-08 18:43:34,707 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-08 18:43:34,745 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_3d0eebd8-b350-4de3-b5e6-1ddec2c94541/bin-2019/utaipan/witness.graphml [2018-12-08 18:43:34,745 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 18:43:34,746 INFO L168 Benchmark]: Toolchain (without parser) took 151170.83 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.0 MB). Free memory was 950.8 MB in the beginning and 868.5 MB in the end (delta: 82.2 MB). Peak memory consumption was 189.2 MB. Max. memory is 11.5 GB. [2018-12-08 18:43:34,747 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 18:43:34,747 INFO L168 Benchmark]: CACSL2BoogieTranslator took 119.21 ms. Allocated memory is still 1.0 GB. Free memory was 950.8 MB in the beginning and 940.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-08 18:43:34,747 INFO L168 Benchmark]: Boogie Procedure Inliner took 10.79 ms. Allocated memory is still 1.0 GB. Free memory is still 940.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 18:43:34,747 INFO L168 Benchmark]: Boogie Preprocessor took 11.52 ms. Allocated memory is still 1.0 GB. Free memory is still 940.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 18:43:34,748 INFO L168 Benchmark]: RCFGBuilder took 143.77 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.0 MB). Free memory was 940.0 MB in the beginning and 1.1 GB in the end (delta: -153.3 MB). Peak memory consumption was 15.6 MB. Max. memory is 11.5 GB. [2018-12-08 18:43:34,748 INFO L168 Benchmark]: TraceAbstraction took 150841.82 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 872.5 MB in the end (delta: 220.8 MB). Peak memory consumption was 220.8 MB. Max. memory is 11.5 GB. [2018-12-08 18:43:34,748 INFO L168 Benchmark]: Witness Printer took 40.84 ms. Allocated memory is still 1.1 GB. Free memory was 872.5 MB in the beginning and 868.5 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 11.5 GB. [2018-12-08 18:43:34,749 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 119.21 ms. Allocated memory is still 1.0 GB. Free memory was 950.8 MB in the beginning and 940.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 10.79 ms. Allocated memory is still 1.0 GB. Free memory is still 940.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.52 ms. Allocated memory is still 1.0 GB. Free memory is still 940.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 143.77 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.0 MB). Free memory was 940.0 MB in the beginning and 1.1 GB in the end (delta: -153.3 MB). Peak memory consumption was 15.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 150841.82 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 872.5 MB in the end (delta: 220.8 MB). Peak memory consumption was 220.8 MB. Max. memory is 11.5 GB. * Witness Printer took 40.84 ms. Allocated memory is still 1.1 GB. Free memory was 872.5 MB in the beginning and 868.5 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int sn=0; [L11] unsigned int loop1=__VERIFIER_nondet_uint(), n1=__VERIFIER_nondet_uint(); [L11] unsigned int loop1=__VERIFIER_nondet_uint(), n1=__VERIFIER_nondet_uint(); [L12] unsigned int x=0; VAL [loop1=2, n1=3, sn=0, x=0] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=0, x=0] [L14] COND TRUE x<10 [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=2, x=0] [L17] x++ VAL [loop1=2, n1=3, sn=2, x=1] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=2, x=1] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=2, x=1] [L14] COND TRUE x<10 [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=4, x=1] [L17] x++ VAL [loop1=2, n1=3, sn=4, x=2] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=4, x=2] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=4, x=2] [L14] COND TRUE x<10 [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=6, x=2] [L17] x++ VAL [loop1=2, n1=3, sn=6, x=3] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=6, x=3] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=6, x=3] [L14] COND TRUE x<10 [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=8, x=3] [L17] x++ VAL [loop1=2, n1=3, sn=8, x=4] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=8, x=4] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=8, x=4] [L14] COND TRUE x<10 [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=10, x=4] [L17] x++ VAL [loop1=2, n1=3, sn=10, x=5] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=10, x=5] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=10, x=5] [L14] COND TRUE x<10 [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=12, x=5] [L17] x++ VAL [loop1=2, n1=3, sn=12, x=6] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=12, x=6] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=12, x=6] [L14] COND TRUE x<10 [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=14, x=6] [L17] x++ VAL [loop1=2, n1=3, sn=14, x=7] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=14, x=7] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=14, x=7] [L14] COND TRUE x<10 [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=16, x=7] [L17] x++ VAL [loop1=2, n1=3, sn=16, x=8] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=16, x=8] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=16, x=8] [L14] COND TRUE x<10 [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=18, x=8] [L17] x++ VAL [loop1=2, n1=3, sn=18, x=9] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=18, x=9] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=18, x=9] [L14] COND TRUE x<10 [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=20, x=9] [L17] x++ VAL [loop1=2, n1=3, sn=20, x=10] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=20, x=10] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=20, x=10] [L14] COND FALSE !(x<10) VAL [loop1=2, n1=3, sn=20, x=10] [L17] x++ VAL [loop1=2, n1=3, sn=20, x=11] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=0] [L3] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L4] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. UNSAFE Result, 150.8s OverallTime, 12 OverallIterations, 11 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 281 SDtfs, 68 SDslu, 1281 SDs, 0 SdLazy, 1222 SolverSat, 46 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1022 GetRequests, 876 SyntacticMatches, 19 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=11, 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, 11 MinimizatonAttempts, 10 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 147.8s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 1052 NumberOfCodeBlocks, 1052 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 1399 ConstructedInterpolants, 0 QuantifiedInterpolants, 301727 SizeOfPredicates, 10 NumberOfNonLiveVariables, 954 ConjunctsInSsa, 121 ConjunctsInUnsatCore, 29 InterpolantComputations, 2 PerfectInterpolantSequences, 1980/3690 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...