./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem19_label23_true-unreach-call.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_a1f25ade-5330-4314-84c4-ae1f95d3cd01/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a1f25ade-5330-4314-84c4-ae1f95d3cd01/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a1f25ade-5330-4314-84c4-ae1f95d3cd01/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a1f25ade-5330-4314-84c4-ae1f95d3cd01/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem19_label23_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_a1f25ade-5330-4314-84c4-ae1f95d3cd01/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a1f25ade-5330-4314-84c4-ae1f95d3cd01/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 7137e362f1a4ffd1932b941d0c2b543cd3b28d47 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished with exit code -9 Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 03:54:43,230 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 03:54:43,231 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 03:54:43,240 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 03:54:43,240 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 03:54:43,241 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 03:54:43,241 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 03:54:43,243 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 03:54:43,244 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 03:54:43,244 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 03:54:43,245 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 03:54:43,245 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 03:54:43,246 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 03:54:43,246 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 03:54:43,247 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 03:54:43,248 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 03:54:43,248 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 03:54:43,249 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 03:54:43,251 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 03:54:43,252 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 03:54:43,253 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 03:54:43,253 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 03:54:43,255 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 03:54:43,255 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 03:54:43,255 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 03:54:43,256 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 03:54:43,257 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 03:54:43,257 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 03:54:43,258 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 03:54:43,259 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 03:54:43,259 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 03:54:43,259 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 03:54:43,259 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 03:54:43,260 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 03:54:43,260 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 03:54:43,261 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 03:54:43,261 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a1f25ade-5330-4314-84c4-ae1f95d3cd01/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-23 03:54:43,271 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 03:54:43,272 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 03:54:43,272 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 03:54:43,273 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 03:54:43,273 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-23 03:54:43,273 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-23 03:54:43,273 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-23 03:54:43,273 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-23 03:54:43,273 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-23 03:54:43,273 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-23 03:54:43,274 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-23 03:54:43,274 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-23 03:54:43,274 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-23 03:54:43,274 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 03:54:43,275 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 03:54:43,275 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 03:54:43,275 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 03:54:43,275 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 03:54:43,275 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 03:54:43,275 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 03:54:43,275 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 03:54:43,276 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 03:54:43,276 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 03:54:43,276 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 03:54:43,276 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 03:54:43,276 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 03:54:43,276 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 03:54:43,276 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 03:54:43,277 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 03:54:43,277 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 03:54:43,277 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 03:54:43,277 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 03:54:43,277 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 03:54:43,277 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-23 03:54:43,277 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 03:54:43,278 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 03:54:43,278 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-23 03:54:43,278 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_a1f25ade-5330-4314-84c4-ae1f95d3cd01/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 -> 7137e362f1a4ffd1932b941d0c2b543cd3b28d47 [2018-11-23 03:54:43,298 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 03:54:43,306 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 03:54:43,309 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 03:54:43,310 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 03:54:43,310 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 03:54:43,311 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a1f25ade-5330-4314-84c4-ae1f95d3cd01/bin-2019/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem19_label23_true-unreach-call.c [2018-11-23 03:54:43,348 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a1f25ade-5330-4314-84c4-ae1f95d3cd01/bin-2019/utaipan/data/bbc2d9560/a180d7550729445693ae50a49f8590ab/FLAGa40b04568 [2018-11-23 03:54:43,935 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 03:54:43,936 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a1f25ade-5330-4314-84c4-ae1f95d3cd01/sv-benchmarks/c/eca-rers2012/Problem19_label23_true-unreach-call.c [2018-11-23 03:54:43,961 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a1f25ade-5330-4314-84c4-ae1f95d3cd01/bin-2019/utaipan/data/bbc2d9560/a180d7550729445693ae50a49f8590ab/FLAGa40b04568 [2018-11-23 03:54:44,329 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a1f25ade-5330-4314-84c4-ae1f95d3cd01/bin-2019/utaipan/data/bbc2d9560/a180d7550729445693ae50a49f8590ab [2018-11-23 03:54:44,331 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 03:54:44,332 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 03:54:44,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 03:54:44,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 03:54:44,336 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 03:54:44,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:54:44" (1/1) ... [2018-11-23 03:54:44,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e9222f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:44, skipping insertion in model container [2018-11-23 03:54:44,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:54:44" (1/1) ... [2018-11-23 03:54:44,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 03:54:44,467 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 03:54:45,754 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 03:54:45,757 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 03:54:46,625 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 03:54:46,647 INFO L195 MainTranslator]: Completed translation [2018-11-23 03:54:46,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:46 WrapperNode [2018-11-23 03:54:46,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 03:54:46,648 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 03:54:46,648 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 03:54:46,648 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 03:54:46,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:46" (1/1) ... [2018-11-23 03:54:46,716 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:46" (1/1) ... [2018-11-23 03:54:46,723 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 03:54:46,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 03:54:46,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 03:54:46,723 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 03:54:46,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:46" (1/1) ... [2018-11-23 03:54:46,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:46" (1/1) ... [2018-11-23 03:54:46,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:46" (1/1) ... [2018-11-23 03:54:46,755 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:46" (1/1) ... [2018-11-23 03:54:46,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:46" (1/1) ... [2018-11-23 03:54:46,872 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:46" (1/1) ... [2018-11-23 03:54:46,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:46" (1/1) ... [2018-11-23 03:54:46,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 03:54:46,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 03:54:46,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 03:54:46,966 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 03:54:46,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a1f25ade-5330-4314-84c4-ae1f95d3cd01/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 [2018-11-23 03:54:47,000 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-23 03:54:47,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 03:54:47,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 03:54:47,001 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2018-11-23 03:54:47,001 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2018-11-23 03:54:47,001 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2018-11-23 03:54:47,001 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2018-11-23 03:54:47,001 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-11-23 03:54:47,001 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-11-23 03:54:47,001 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-11-23 03:54:47,002 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-11-23 03:54:47,002 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-23 03:54:47,002 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-23 03:54:47,002 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-23 03:54:47,002 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-23 03:54:47,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 03:54:47,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 03:54:47,003 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 03:54:47,003 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 03:54:53,553 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 03:54:53,553 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-11-23 03:54:53,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:54:53 BoogieIcfgContainer [2018-11-23 03:54:53,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 03:54:53,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 03:54:53,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 03:54:53,557 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 03:54:53,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:54:44" (1/3) ... [2018-11-23 03:54:53,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41d704ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:54:53, skipping insertion in model container [2018-11-23 03:54:53,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:46" (2/3) ... [2018-11-23 03:54:53,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41d704ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:54:53, skipping insertion in model container [2018-11-23 03:54:53,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:54:53" (3/3) ... [2018-11-23 03:54:53,560 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label23_true-unreach-call.c [2018-11-23 03:54:53,566 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 03:54:53,573 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 03:54:53,583 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 03:54:53,615 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 03:54:53,615 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 03:54:53,615 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 03:54:53,615 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 03:54:53,615 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 03:54:53,615 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 03:54:53,615 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 03:54:53,616 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 03:54:53,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2018-11-23 03:54:53,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-23 03:54:53,650 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 03:54:53,651 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 03:54:53,653 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 03:54:53,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:54:53,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1055172910, now seen corresponding path program 1 times [2018-11-23 03:54:53,658 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 03:54:53,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:54:53,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 03:54:53,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:54:53,688 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 03:54:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:54:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 03:54:53,910 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 03:54:53,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-23 03:54:53,910 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 03:54:53,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-23 03:54:53,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-23 03:54:53,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-23 03:54:53,927 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 3 states. [2018-11-23 03:55:00,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 03:55:00,607 INFO L93 Difference]: Finished difference Result 4996 states and 9417 transitions. [2018-11-23 03:55:00,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-23 03:55:00,615 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2018-11-23 03:55:00,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 03:55:00,641 INFO L225 Difference]: With dead ends: 4996 [2018-11-23 03:55:00,641 INFO L226 Difference]: Without dead ends: 3217 [2018-11-23 03:55:00,649 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-23 03:55:00,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3217 states. [2018-11-23 03:55:00,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3217 to 3213. [2018-11-23 03:55:00,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3213 states. [2018-11-23 03:55:00,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 5843 transitions. [2018-11-23 03:55:00,775 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 5843 transitions. Word has length 58 [2018-11-23 03:55:00,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 03:55:00,775 INFO L480 AbstractCegarLoop]: Abstraction has 3213 states and 5843 transitions. [2018-11-23 03:55:00,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-23 03:55:00,776 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 5843 transitions. [2018-11-23 03:55:00,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-11-23 03:55:00,780 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 03:55:00,780 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 03:55:00,780 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 03:55:00,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:55:00,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1765822305, now seen corresponding path program 1 times [2018-11-23 03:55:00,781 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 03:55:00,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:55:00,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 03:55:00,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:55:00,782 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 03:55:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:55:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 03:55:00,926 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 03:55:00,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-23 03:55:00,927 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 03:55:00,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 03:55:00,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 03:55:00,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-23 03:55:00,928 INFO L87 Difference]: Start difference. First operand 3213 states and 5843 transitions. Second operand 6 states. [2018-11-23 03:55:11,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 03:55:11,482 INFO L93 Difference]: Finished difference Result 9325 states and 16904 transitions. [2018-11-23 03:55:11,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 03:55:11,486 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2018-11-23 03:55:11,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 03:55:11,500 INFO L225 Difference]: With dead ends: 9325 [2018-11-23 03:55:11,500 INFO L226 Difference]: Without dead ends: 6118 [2018-11-23 03:55:11,506 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-23 03:55:11,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6118 states. [2018-11-23 03:55:11,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6118 to 6081. [2018-11-23 03:55:11,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6081 states. [2018-11-23 03:55:11,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6081 states to 6081 states and 9613 transitions. [2018-11-23 03:55:11,590 INFO L78 Accepts]: Start accepts. Automaton has 6081 states and 9613 transitions. Word has length 129 [2018-11-23 03:55:11,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 03:55:11,590 INFO L480 AbstractCegarLoop]: Abstraction has 6081 states and 9613 transitions. [2018-11-23 03:55:11,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 03:55:11,590 INFO L276 IsEmpty]: Start isEmpty. Operand 6081 states and 9613 transitions. [2018-11-23 03:55:11,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-11-23 03:55:11,593 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 03:55:11,593 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 03:55:11,594 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 03:55:11,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:55:11,594 INFO L82 PathProgramCache]: Analyzing trace with hash 61983839, now seen corresponding path program 1 times [2018-11-23 03:55:11,595 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 03:55:11,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:55:11,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 03:55:11,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:55:11,596 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 03:55:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:55:11,726 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 03:55:11,726 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 03:55:11,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-23 03:55:11,726 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 03:55:11,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 03:55:11,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 03:55:11,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-23 03:55:11,728 INFO L87 Difference]: Start difference. First operand 6081 states and 9613 transitions. Second operand 6 states. [2018-11-23 03:55:28,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 03:55:28,245 INFO L93 Difference]: Finished difference Result 24215 states and 39673 transitions. [2018-11-23 03:55:28,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 03:55:28,245 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 147 [2018-11-23 03:55:28,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 03:55:28,287 INFO L225 Difference]: With dead ends: 24215 [2018-11-23 03:55:28,287 INFO L226 Difference]: Without dead ends: 18140 [2018-11-23 03:55:28,305 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-23 03:55:28,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18140 states. [2018-11-23 03:55:28,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18140 to 18076. [2018-11-23 03:55:28,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18076 states. [2018-11-23 03:55:28,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18076 states to 18076 states and 25617 transitions. [2018-11-23 03:55:28,544 INFO L78 Accepts]: Start accepts. Automaton has 18076 states and 25617 transitions. Word has length 147 [2018-11-23 03:55:28,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 03:55:28,544 INFO L480 AbstractCegarLoop]: Abstraction has 18076 states and 25617 transitions. [2018-11-23 03:55:28,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 03:55:28,544 INFO L276 IsEmpty]: Start isEmpty. Operand 18076 states and 25617 transitions. [2018-11-23 03:55:28,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-11-23 03:55:28,548 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 03:55:28,548 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 03:55:28,549 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 03:55:28,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:55:28,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1912796404, now seen corresponding path program 1 times [2018-11-23 03:55:28,549 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 03:55:28,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:55:28,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 03:55:28,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:55:28,550 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 03:55:28,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:55:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 03:55:28,666 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 03:55:28,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 03:55:28,667 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 03:55:28,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 03:55:28,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 03:55:28,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 03:55:28,667 INFO L87 Difference]: Start difference. First operand 18076 states and 25617 transitions. Second operand 5 states. [2018-11-23 03:55:38,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 03:55:38,105 INFO L93 Difference]: Finished difference Result 56293 states and 84983 transitions. [2018-11-23 03:55:38,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 03:55:38,106 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 192 [2018-11-23 03:55:38,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 03:55:38,187 INFO L225 Difference]: With dead ends: 56293 [2018-11-23 03:55:38,187 INFO L226 Difference]: Without dead ends: 38223 [2018-11-23 03:55:38,218 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-23 03:55:38,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38223 states. [2018-11-23 03:55:38,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38223 to 37161. [2018-11-23 03:55:38,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37161 states. [2018-11-23 03:55:38,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37161 states to 37161 states and 50426 transitions. [2018-11-23 03:55:38,691 INFO L78 Accepts]: Start accepts. Automaton has 37161 states and 50426 transitions. Word has length 192 [2018-11-23 03:55:38,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 03:55:38,691 INFO L480 AbstractCegarLoop]: Abstraction has 37161 states and 50426 transitions. [2018-11-23 03:55:38,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 03:55:38,692 INFO L276 IsEmpty]: Start isEmpty. Operand 37161 states and 50426 transitions. [2018-11-23 03:55:38,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-11-23 03:55:38,697 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 03:55:38,697 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 03:55:38,697 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 03:55:38,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:55:38,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1764116136, now seen corresponding path program 1 times [2018-11-23 03:55:38,698 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 03:55:38,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:55:38,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 03:55:38,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:55:38,699 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 03:55:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:55:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 102 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 03:55:38,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:55:38,927 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 03:55:38,927 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 212 with the following transitions: [2018-11-23 03:55:38,929 INFO L202 CegarAbsIntRunner]: [0], [1], [5227], [5234], [5242], [5250], [5258], [5266], [5274], [5282], [5290], [5298], [5306], [5314], [5322], [5330], [5338], [5346], [5354], [5362], [5370], [5378], [5386], [5394], [5402], [5410], [5418], [5426], [5434], [5442], [5450], [5458], [5466], [5474], [5482], [5490], [5498], [5506], [5514], [5522], [5530], [5538], [5546], [5554], [5562], [5570], [5578], [5586], [5594], [5598], [5600], [5603], [5611], [5619], [5627], [5635], [5643], [5651], [5659], [5667], [5675], [5683], [5691], [5699], [5707], [5715], [5727], [5731], [5742], [5745], [5746], [5750], [5754], [5758], [5762], [5766], [5770], [5774], [5778], [5781], [6802], [6806], [6815], [6819], [6821], [6836], [6837], [6838], [6840], [6841] [2018-11-23 03:55:38,956 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 03:55:38,957 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 03:55:39,186 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-23 03:55:39,187 INFO L272 AbstractInterpreter]: Visited 86 different actions 86 times. Never merged. Never widened. Performed 796 root evaluator evaluations with a maximum evaluation depth of 3. Performed 796 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 26 variables. [2018-11-23 03:55:39,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:55:39,206 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-23 03:55:39,454 INFO L227 lantSequenceWeakener]: Weakened 202 states. On average, predicates are now at 75.76% of their original sizes. [2018-11-23 03:55:39,455 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-23 03:55:39,488 INFO L415 sIntCurrentIteration]: We unified 210 AI predicates to 210 [2018-11-23 03:55:39,488 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-23 03:55:39,489 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-23 03:55:39,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2018-11-23 03:55:39,489 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 03:55:39,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 03:55:39,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 03:55:39,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-23 03:55:39,490 INFO L87 Difference]: Start difference. First operand 37161 states and 50426 transitions. Second operand 6 states. [2018-11-23 03:58:52,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 03:58:52,295 INFO L93 Difference]: Finished difference Result 75706 states and 102451 transitions. [2018-11-23 03:58:52,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 03:58:52,296 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 211 [2018-11-23 03:58:52,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 03:58:52,381 INFO L225 Difference]: With dead ends: 75706 [2018-11-23 03:58:52,381 INFO L226 Difference]: Without dead ends: 38551 [2018-11-23 03:58:52,419 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 211 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-23 03:58:52,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38551 states. [2018-11-23 03:58:52,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38551 to 38550. [2018-11-23 03:58:52,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38550 states. [2018-11-23 03:58:52,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38550 states to 38550 states and 51831 transitions. [2018-11-23 03:58:52,992 INFO L78 Accepts]: Start accepts. Automaton has 38550 states and 51831 transitions. Word has length 211 [2018-11-23 03:58:52,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 03:58:52,992 INFO L480 AbstractCegarLoop]: Abstraction has 38550 states and 51831 transitions. [2018-11-23 03:58:52,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 03:58:52,992 INFO L276 IsEmpty]: Start isEmpty. Operand 38550 states and 51831 transitions. [2018-11-23 03:58:53,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2018-11-23 03:58:53,003 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 03:58:53,003 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 03:58:53,004 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 03:58:53,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:58:53,004 INFO L82 PathProgramCache]: Analyzing trace with hash -442649519, now seen corresponding path program 1 times [2018-11-23 03:58:53,004 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 03:58:53,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:58:53,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 03:58:53,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:58:53,005 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 03:58:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:58:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 158 proven. 138 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-23 03:58:53,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:58:53,336 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 03:58:53,336 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 451 with the following transitions: [2018-11-23 03:58:53,337 INFO L202 CegarAbsIntRunner]: [0], [1], [5227], [5234], [5242], [5250], [5258], [5266], [5274], [5282], [5290], [5298], [5306], [5314], [5322], [5330], [5338], [5346], [5354], [5362], [5370], [5378], [5386], [5394], [5402], [5410], [5418], [5426], [5434], [5442], [5450], [5458], [5466], [5474], [5482], [5490], [5498], [5506], [5514], [5522], [5530], [5538], [5546], [5554], [5562], [5570], [5578], [5586], [5594], [5598], [5600], [5603], [5611], [5619], [5627], [5635], [5643], [5651], [5659], [5667], [5675], [5683], [5691], [5699], [5707], [5715], [5727], [5731], [5742], [5745], [5746], [5750], [5754], [5758], [5762], [5766], [5770], [5774], [5778], [5781], [5782], [5786], [5797], [5808], [5819], [5823], [5827], [5838], [5842], [5846], [5850], [5854], [5858], [5862], [5866], [5870], [5874], [5878], [5882], [5886], [5890], [5894], [5898], [5902], [5906], [5910], [5914], [5918], [5922], [5926], [5930], [5934], [5938], [5942], [5946], [5950], [5954], [5958], [5962], [5966], [5977], [5981], [5985], [5996], [6000], [6004], [6008], [6012], [6016], [6020], [6024], [6028], [6032], [6036], [6040], [6051], [6055], [6059], [6063], [6067], [6071], [6075], [6079], [6083], [6087], [6091], [6102], [6106], [6110], [6121], [6125], [6129], [6140], [6144], [6148], [6152], [6156], [6160], [6164], [6168], [6172], [6176], [6180], [6184], [6188], [6192], [6196], [6200], [6204], [6208], [6212], [6216], [6220], [6224], [6228], [6232], [6236], [6240], [6251], [6255], [6259], [6263], [6267], [6278], [6282], [6286], [6290], [6294], [6298], [6302], [6306], [6310], [6314], [6325], [6329], [6333], [6344], [6348], [6352], [6356], [6360], [6371], [6375], [6379], [6383], [6387], [6391], [6402], [6413], [6417], [6421], [6425], [6429], [6440], [6444], [6455], [6459], [6463], [6467], [6471], [6475], [6486], [6490], [6494], [6498], [6502], [6506], [6510], [6514], [6525], [6529], [6533], [6537], [6541], [6545], [6549], [6553], [6557], [6560], [6802], [6806], [6815], [6819], [6821], [6836], [6837], [6838], [6840], [6841] [2018-11-23 03:58:53,345 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 03:58:53,345 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 03:58:53,842 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-23 03:58:53,842 INFO L272 AbstractInterpreter]: Visited 249 different actions 490 times. Merged at 3 different actions 3 times. Never widened. Performed 6127 root evaluator evaluations with a maximum evaluation depth of 14. Performed 6127 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-23 03:58:53,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:58:53,845 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-23 03:58:53,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:58:53,845 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a1f25ade-5330-4314-84c4-ae1f95d3cd01/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 [2018-11-23 03:58:53,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 03:58:53,856 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 03:58:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:58:53,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 03:58:54,328 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 246 proven. 2 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2018-11-23 03:58:54,329 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 03:58:54,641 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 160 proven. 136 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-23 03:58:54,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 03:58:54,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2018-11-23 03:58:54,656 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 03:58:54,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 03:58:54,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 03:58:54,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-23 03:58:54,658 INFO L87 Difference]: Start difference. First operand 38550 states and 51831 transitions. Second operand 6 states. [2018-11-23 03:59:05,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 03:59:05,029 INFO L93 Difference]: Finished difference Result 114299 states and 163100 transitions. [2018-11-23 03:59:05,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-23 03:59:05,030 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 450 [2018-11-23 03:59:05,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 03:59:05,298 INFO L225 Difference]: With dead ends: 114299 [2018-11-23 03:59:05,298 INFO L226 Difference]: Without dead ends: 77144 [2018-11-23 03:59:05,359 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 915 GetRequests, 902 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-23 03:59:05,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77144 states. [2018-11-23 03:59:06,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77144 to 75492. [2018-11-23 03:59:06,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75492 states. [2018-11-23 03:59:06,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75492 states to 75492 states and 100355 transitions. [2018-11-23 03:59:06,278 INFO L78 Accepts]: Start accepts. Automaton has 75492 states and 100355 transitions. Word has length 450 [2018-11-23 03:59:06,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 03:59:06,279 INFO L480 AbstractCegarLoop]: Abstraction has 75492 states and 100355 transitions. [2018-11-23 03:59:06,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 03:59:06,279 INFO L276 IsEmpty]: Start isEmpty. Operand 75492 states and 100355 transitions. [2018-11-23 03:59:06,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2018-11-23 03:59:06,287 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 03:59:06,288 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 03:59:06,288 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 03:59:06,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:59:06,288 INFO L82 PathProgramCache]: Analyzing trace with hash 824575937, now seen corresponding path program 1 times [2018-11-23 03:59:06,288 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 03:59:06,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:59:06,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 03:59:06,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:59:06,289 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 03:59:06,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:59:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 253 proven. 69 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-11-23 03:59:06,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:59:06,569 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 03:59:06,570 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 467 with the following transitions: [2018-11-23 03:59:06,570 INFO L202 CegarAbsIntRunner]: [0], [1], [5227], [5234], [5242], [5250], [5258], [5266], [5274], [5282], [5290], [5298], [5306], [5314], [5322], [5330], [5338], [5346], [5354], [5362], [5370], [5378], [5386], [5394], [5402], [5410], [5418], [5426], [5434], [5442], [5450], [5458], [5466], [5474], [5482], [5490], [5498], [5506], [5514], [5522], [5530], [5538], [5546], [5554], [5562], [5570], [5578], [5586], [5594], [5598], [5600], [5603], [5611], [5619], [5627], [5635], [5643], [5651], [5659], [5667], [5675], [5683], [5691], [5699], [5707], [5715], [5719], [5724], [5726], [5727], [5731], [5742], [5746], [5750], [5754], [5758], [5762], [5766], [5770], [5774], [5778], [5782], [5786], [5797], [5808], [5819], [5823], [5827], [5838], [5842], [5846], [5850], [5854], [5858], [5862], [5866], [5870], [5874], [5877], [5878], [5882], [5886], [5890], [5894], [5898], [5902], [5906], [5910], [5914], [5918], [5922], [5926], [5930], [5934], [5938], [5942], [5946], [5950], [5954], [5958], [5962], [5966], [5977], [5981], [5985], [5996], [6000], [6004], [6008], [6012], [6016], [6020], [6024], [6028], [6032], [6036], [6040], [6051], [6055], [6059], [6063], [6067], [6071], [6075], [6079], [6083], [6087], [6091], [6102], [6106], [6110], [6121], [6125], [6129], [6140], [6144], [6148], [6152], [6156], [6160], [6164], [6168], [6172], [6176], [6180], [6184], [6188], [6192], [6196], [6200], [6204], [6208], [6212], [6216], [6220], [6224], [6228], [6232], [6236], [6240], [6251], [6255], [6259], [6263], [6267], [6278], [6282], [6286], [6290], [6294], [6298], [6302], [6306], [6310], [6314], [6325], [6329], [6333], [6344], [6348], [6352], [6356], [6360], [6371], [6375], [6379], [6383], [6387], [6391], [6402], [6413], [6417], [6421], [6425], [6429], [6440], [6444], [6455], [6459], [6463], [6467], [6471], [6475], [6486], [6490], [6494], [6498], [6502], [6506], [6510], [6514], [6525], [6529], [6533], [6537], [6541], [6545], [6549], [6553], [6557], [6560], [6802], [6806], [6815], [6819], [6821], [6836], [6837], [6838], [6840], [6841] [2018-11-23 03:59:06,575 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 03:59:06,576 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 03:59:08,392 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-23 03:59:08,392 INFO L272 AbstractInterpreter]: Visited 251 different actions 1240 times. Merged at 7 different actions 30 times. Never widened. Performed 16564 root evaluator evaluations with a maximum evaluation depth of 8. Performed 16564 inverse root evaluator evaluations with a maximum inverse evaluation depth of 8. Found 8 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-23 03:59:08,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:59:08,398 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-23 03:59:08,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:59:08,398 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a1f25ade-5330-4314-84c4-ae1f95d3cd01/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 [2018-11-23 03:59:08,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 03:59:08,404 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 03:59:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:59:08,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 03:59:08,559 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 335 proven. 2 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-11-23 03:59:08,559 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 03:59:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 253 proven. 69 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-11-23 03:59:08,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 03:59:08,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-23 03:59:08,675 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 03:59:08,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-23 03:59:08,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-23 03:59:08,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-11-23 03:59:08,676 INFO L87 Difference]: Start difference. First operand 75492 states and 100355 transitions. Second operand 9 states. [2018-11-23 03:59:31,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 03:59:31,771 INFO L93 Difference]: Finished difference Result 259541 states and 442276 transitions. [2018-11-23 03:59:31,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-11-23 03:59:31,771 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 466 [2018-11-23 03:59:31,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 03:59:32,153 INFO L225 Difference]: With dead ends: 259541 [2018-11-23 03:59:32,154 INFO L226 Difference]: Without dead ends: 185444 [2018-11-23 03:59:32,309 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1033 GetRequests, 975 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=671, Invalid=2751, Unknown=0, NotChecked=0, Total=3422 [2018-11-23 03:59:32,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185444 states. [2018-11-23 03:59:34,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185444 to 182056. [2018-11-23 03:59:34,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182056 states. [2018-11-23 03:59:34,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182056 states to 182056 states and 254966 transitions. [2018-11-23 03:59:34,843 INFO L78 Accepts]: Start accepts. Automaton has 182056 states and 254966 transitions. Word has length 466 [2018-11-23 03:59:34,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 03:59:34,844 INFO L480 AbstractCegarLoop]: Abstraction has 182056 states and 254966 transitions. [2018-11-23 03:59:34,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-23 03:59:34,844 INFO L276 IsEmpty]: Start isEmpty. Operand 182056 states and 254966 transitions. [2018-11-23 03:59:34,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 690 [2018-11-23 03:59:34,855 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 03:59:34,855 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 03:59:34,855 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 03:59:34,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:59:34,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1924049528, now seen corresponding path program 1 times [2018-11-23 03:59:34,856 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 03:59:34,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:59:34,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 03:59:34,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:59:34,856 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 03:59:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:59:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 409 proven. 69 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2018-11-23 03:59:35,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:59:35,134 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 03:59:35,134 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 690 with the following transitions: [2018-11-23 03:59:35,135 INFO L202 CegarAbsIntRunner]: [0], [1], [5227], [5234], [5242], [5250], [5258], [5266], [5274], [5282], [5290], [5298], [5306], [5314], [5322], [5330], [5338], [5346], [5354], [5362], [5370], [5378], [5386], [5394], [5402], [5410], [5418], [5426], [5434], [5442], [5450], [5458], [5466], [5474], [5482], [5490], [5498], [5506], [5514], [5522], [5530], [5538], [5546], [5554], [5562], [5570], [5578], [5586], [5594], [5598], [5600], [5603], [5611], [5619], [5627], [5635], [5643], [5651], [5659], [5667], [5675], [5683], [5691], [5699], [5707], [5715], [5719], [5724], [5726], [5727], [5731], [5742], [5746], [5750], [5754], [5758], [5762], [5766], [5770], [5774], [5778], [5782], [5786], [5797], [5808], [5819], [5823], [5827], [5838], [5842], [5846], [5850], [5854], [5858], [5862], [5866], [5870], [5874], [5877], [5878], [5882], [5886], [5890], [5894], [5898], [5902], [5906], [5910], [5914], [5918], [5922], [5926], [5930], [5934], [5938], [5942], [5946], [5950], [5954], [5958], [5962], [5966], [5977], [5981], [5985], [5996], [6000], [6004], [6008], [6012], [6016], [6020], [6024], [6028], [6032], [6036], [6040], [6051], [6055], [6059], [6063], [6067], [6071], [6075], [6079], [6083], [6087], [6091], [6102], [6106], [6110], [6121], [6125], [6129], [6140], [6144], [6148], [6152], [6156], [6160], [6164], [6168], [6172], [6176], [6180], [6184], [6188], [6192], [6196], [6200], [6204], [6208], [6212], [6216], [6220], [6224], [6228], [6232], [6236], [6240], [6251], [6255], [6259], [6263], [6267], [6278], [6282], [6286], [6290], [6294], [6298], [6302], [6306], [6310], [6314], [6325], [6329], [6333], [6344], [6348], [6352], [6356], [6360], [6371], [6375], [6379], [6383], [6387], [6391], [6402], [6413], [6417], [6421], [6425], [6429], [6440], [6444], [6455], [6459], [6463], [6467], [6471], [6475], [6486], [6489], [6490], [6494], [6498], [6502], [6506], [6510], [6514], [6525], [6529], [6533], [6537], [6541], [6545], [6549], [6553], [6557], [6560], [6802], [6806], [6815], [6819], [6821], [6836], [6837], [6838], [6840], [6841] [2018-11-23 03:59:35,138 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 03:59:35,138 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 03:59:36,140 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-23 03:59:36,140 INFO L272 AbstractInterpreter]: Visited 252 different actions 1753 times. Merged at 8 different actions 54 times. Widened at 1 different actions 2 times. Performed 24423 root evaluator evaluations with a maximum evaluation depth of 9. Performed 24423 inverse root evaluator evaluations with a maximum inverse evaluation depth of 9. Found 16 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-23 03:59:36,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:59:36,150 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-23 03:59:36,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:59:36,150 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a1f25ade-5330-4314-84c4-ae1f95d3cd01/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 [2018-11-23 03:59:36,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 03:59:36,161 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 03:59:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:59:36,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 03:59:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 556 proven. 2 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2018-11-23 03:59:36,429 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 03:59:36,617 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 409 proven. 69 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2018-11-23 03:59:36,631 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 03:59:36,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-23 03:59:36,631 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 03:59:36,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-23 03:59:36,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-23 03:59:36,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-11-23 03:59:36,632 INFO L87 Difference]: Start difference. First operand 182056 states and 254966 transitions. Second operand 9 states. [2018-11-23 04:00:12,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 04:00:12,384 INFO L93 Difference]: Finished difference Result 565154 states and 1229717 transitions. [2018-11-23 04:00:12,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-11-23 04:00:12,384 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 689 [2018-11-23 04:00:12,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 04:00:13,800 INFO L225 Difference]: With dead ends: 565154 [2018-11-23 04:00:13,800 INFO L226 Difference]: Without dead ends: 365129 [2018-11-23 04:00:14,683 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1471 GetRequests, 1417 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=615, Invalid=2355, Unknown=0, NotChecked=0, Total=2970 [2018-11-23 04:00:14,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365129 states. [2018-11-23 04:00:21,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365129 to 361928. [2018-11-23 04:00:21,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361928 states. [2018-11-23 04:00:25,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361928 states to 361928 states and 669249 transitions. [2018-11-23 04:00:25,171 INFO L78 Accepts]: Start accepts. Automaton has 361928 states and 669249 transitions. Word has length 689 [2018-11-23 04:00:25,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 04:00:25,172 INFO L480 AbstractCegarLoop]: Abstraction has 361928 states and 669249 transitions. [2018-11-23 04:00:25,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-23 04:00:25,172 INFO L276 IsEmpty]: Start isEmpty. Operand 361928 states and 669249 transitions. [2018-11-23 04:00:25,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2018-11-23 04:00:25,181 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 04:00:25,181 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 04:00:25,181 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 04:00:25,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 04:00:25,183 INFO L82 PathProgramCache]: Analyzing trace with hash -575402801, now seen corresponding path program 1 times [2018-11-23 04:00:25,183 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 04:00:25,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:00:25,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 04:00:25,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:00:25,184 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 04:00:25,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:00:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 158 proven. 154 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-23 04:00:25,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 04:00:25,677 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 04:00:25,678 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 736 with the following transitions: [2018-11-23 04:00:25,678 INFO L202 CegarAbsIntRunner]: [0], [1], [4196], [4200], [4204], [4208], [4212], [4216], [4220], [4224], [4228], [4232], [4236], [4240], [4244], [4248], [4252], [4256], [4260], [4264], [4268], [4279], [4290], [4294], [4298], [4309], [4313], [4317], [4321], [4325], [4329], [4333], [4337], [4341], [4345], [4349], [4353], [4357], [4361], [4365], [4369], [4373], [4377], [4381], [4385], [4396], [4400], [4404], [4408], [4412], [4416], [4420], [4431], [4435], [4439], [4443], [4454], [4458], [4462], [4466], [4470], [4474], [4478], [4482], [4486], [4490], [4494], [4498], [4502], [4506], [4510], [4514], [4518], [4522], [4526], [4530], [4534], [4538], [4542], [4553], [4557], [4561], [4565], [4569], [4573], [4577], [4581], [4585], [4589], [4593], [4597], [4601], [4605], [4609], [4620], [4624], [4628], [4632], [4636], [4647], [4651], [4655], [4659], [4663], [4667], [4671], [4675], [4679], [4690], [4694], [4698], [4709], [4713], [4717], [4721], [4725], [4729], [4733], [4737], [4741], [4745], [4749], [4753], [4764], [4768], [4772], [4776], [4780], [4784], [4788], [4792], [4803], [4807], [4811], [4815], [4819], [4823], [4827], [4831], [4835], [4839], [4843], [4847], [4858], [4862], [4873], [4877], [4881], [4885], [4896], [4900], [4904], [4908], [4912], [4916], [4920], [4924], [4935], [4939], [4943], [4954], [4958], [4962], [4966], [4970], [4974], [4978], [4982], [4986], [4990], [4994], [4998], [5002], [5006], [5010], [5014], [5018], [5022], [5026], [5030], [5034], [5038], [5042], [5046], [5050], [5054], [5058], [5062], [5066], [5070], [5074], [5078], [5082], [5086], [5090], [5094], [5105], [5109], [5120], [5124], [5128], [5132], [5136], [5140], [5144], [5148], [5152], [5156], [5167], [5171], [5175], [5179], [5183], [5187], [5191], [5195], [5199], [5202], [5226], [5227], [5234], [5242], [5250], [5258], [5266], [5274], [5282], [5290], [5298], [5306], [5314], [5322], [5330], [5338], [5346], [5354], [5362], [5370], [5378], [5386], [5394], [5402], [5410], [5418], [5426], [5434], [5442], [5450], [5458], [5466], [5474], [5482], [5490], [5498], [5506], [5514], [5522], [5530], [5538], [5546], [5554], [5562], [5570], [5578], [5586], [5594], [5598], [5600], [5603], [5611], [5619], [5627], [5635], [5643], [5651], [5659], [5667], [5675], [5683], [5691], [5699], [5707], [5715], [5719], [5724], [5726], [5727], [5731], [5742], [5746], [5750], [5754], [5758], [5762], [5766], [5770], [5774], [5778], [5782], [5786], [5797], [5808], [5819], [5823], [5827], [5838], [5842], [5846], [5850], [5854], [5858], [5862], [5866], [5870], [5874], [5877], [5878], [5882], [5886], [5890], [5894], [5898], [5902], [5906], [5910], [5914], [5918], [5922], [5926], [5930], [5934], [5938], [5942], [5946], [5950], [5954], [5958], [5962], [5966], [5977], [5981], [5985], [5996], [6000], [6004], [6008], [6012], [6016], [6020], [6024], [6028], [6032], [6036], [6040], [6051], [6055], [6059], [6063], [6067], [6071], [6075], [6079], [6083], [6087], [6091], [6102], [6106], [6110], [6121], [6125], [6129], [6140], [6144], [6148], [6152], [6156], [6160], [6164], [6168], [6172], [6176], [6180], [6184], [6188], [6192], [6196], [6200], [6204], [6208], [6212], [6216], [6220], [6224], [6228], [6232], [6236], [6240], [6251], [6255], [6259], [6263], [6267], [6278], [6282], [6286], [6290], [6294], [6298], [6302], [6306], [6310], [6314], [6325], [6329], [6333], [6344], [6348], [6352], [6356], [6360], [6371], [6375], [6379], [6383], [6387], [6391], [6402], [6413], [6417], [6421], [6425], [6429], [6440], [6444], [6455], [6459], [6463], [6467], [6471], [6475], [6486], [6490], [6494], [6498], [6502], [6506], [6510], [6514], [6525], [6529], [6533], [6537], [6541], [6545], [6549], [6553], [6557], [6561], [6565], [6569], [6573], [6577], [6581], [6585], [6589], [6593], [6604], [6608], [6619], [6623], [6634], [6645], [6649], [6653], [6657], [6661], [6665], [6669], [6673], [6677], [6681], [6685], [6689], [6693], [6697], [6701], [6712], [6716], [6727], [6731], [6735], [6739], [6743], [6747], [6751], [6755], [6759], [6763], [6767], [6771], [6775], [6779], [6783], [6787], [6791], [6795], [6799], [6801], [6802], [6806], [6815], [6819], [6821], [6834], [6835], [6836], [6837], [6838], [6840], [6841] [2018-11-23 04:00:25,686 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 04:00:25,686 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 04:00:26,070 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-23 04:00:26,070 INFO L272 AbstractInterpreter]: Visited 517 different actions 1028 times. Merged at 4 different actions 4 times. Never widened. Performed 13388 root evaluator evaluations with a maximum evaluation depth of 8. Performed 13388 inverse root evaluator evaluations with a maximum inverse evaluation depth of 8. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-23 04:00:26,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 04:00:26,074 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-23 04:00:26,625 INFO L227 lantSequenceWeakener]: Weakened 730 states. On average, predicates are now at 75.24% of their original sizes. [2018-11-23 04:00:26,625 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-23 04:00:26,688 INFO L415 sIntCurrentIteration]: We unified 734 AI predicates to 734 [2018-11-23 04:00:26,688 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-23 04:00:26,688 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-23 04:00:26,688 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [6] total 18 [2018-11-23 04:00:26,688 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 04:00:26,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-23 04:00:26,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-23 04:00:26,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-11-23 04:00:26,689 INFO L87 Difference]: Start difference. First operand 361928 states and 669249 transitions. Second operand 14 states.