java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label47_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 07:18:01,216 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 07:18:01,220 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 07:18:01,242 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 07:18:01,242 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 07:18:01,243 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 07:18:01,245 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 07:18:01,247 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 07:18:01,248 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 07:18:01,249 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 07:18:01,250 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 07:18:01,250 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 07:18:01,251 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 07:18:01,252 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 07:18:01,254 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 07:18:01,254 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 07:18:01,259 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 07:18:01,263 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 07:18:01,268 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 07:18:01,272 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 07:18:01,274 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 07:18:01,276 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 07:18:01,281 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 07:18:01,283 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 07:18:01,283 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 07:18:01,284 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 07:18:01,290 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 07:18:01,291 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 07:18:01,292 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 07:18:01,295 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 07:18:01,295 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 07:18:01,296 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 07:18:01,296 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 07:18:01,296 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 07:18:01,297 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 07:18:01,299 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 07:18:01,300 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-11-07 07:18:01,328 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 07:18:01,329 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 07:18:01,329 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 07:18:01,330 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 07:18:01,330 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 07:18:01,330 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 07:18:01,330 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-07 07:18:01,331 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 07:18:01,331 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 07:18:01,331 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 07:18:01,331 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 07:18:01,331 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 07:18:01,331 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 07:18:01,332 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-07 07:18:01,332 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 07:18:01,333 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 07:18:01,333 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 07:18:01,333 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 07:18:01,333 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 07:18:01,333 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 07:18:01,334 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 07:18:01,334 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 07:18:01,334 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 07:18:01,334 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 07:18:01,334 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 07:18:01,335 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 07:18:01,335 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 07:18:01,335 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 07:18:01,335 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 07:18:01,335 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 07:18:01,336 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 07:18:01,336 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 07:18:01,336 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 07:18:01,336 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 07:18:01,337 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 07:18:01,337 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 07:18:01,382 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 07:18:01,399 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 07:18:01,403 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 07:18:01,405 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 07:18:01,406 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 07:18:01,406 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label47_true-unreach-call.c [2018-11-07 07:18:01,476 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0abb8ec48/9aff5047728c4c7b88adea495697dd0d/FLAG10afb7956 [2018-11-07 07:18:02,166 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 07:18:02,167 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label47_true-unreach-call.c [2018-11-07 07:18:02,185 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0abb8ec48/9aff5047728c4c7b88adea495697dd0d/FLAG10afb7956 [2018-11-07 07:18:02,200 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0abb8ec48/9aff5047728c4c7b88adea495697dd0d [2018-11-07 07:18:02,212 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 07:18:02,214 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 07:18:02,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 07:18:02,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 07:18:02,219 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 07:18:02,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:18:02" (1/1) ... [2018-11-07 07:18:02,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59271772 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:18:02, skipping insertion in model container [2018-11-07 07:18:02,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:18:02" (1/1) ... [2018-11-07 07:18:02,234 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 07:18:02,344 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 07:18:03,153 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 07:18:03,162 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 07:18:03,435 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 07:18:03,461 INFO L193 MainTranslator]: Completed translation [2018-11-07 07:18:03,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:18:03 WrapperNode [2018-11-07 07:18:03,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 07:18:03,463 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 07:18:03,463 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 07:18:03,463 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 07:18:03,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:18:03" (1/1) ... [2018-11-07 07:18:03,654 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:18:03" (1/1) ... [2018-11-07 07:18:03,667 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 07:18:03,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 07:18:03,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 07:18:03,668 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 07:18:03,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:18:03" (1/1) ... [2018-11-07 07:18:03,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:18:03" (1/1) ... [2018-11-07 07:18:03,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:18:03" (1/1) ... [2018-11-07 07:18:03,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:18:03" (1/1) ... [2018-11-07 07:18:03,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:18:03" (1/1) ... [2018-11-07 07:18:03,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:18:03" (1/1) ... [2018-11-07 07:18:03,835 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:18:03" (1/1) ... [2018-11-07 07:18:03,850 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 07:18:03,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 07:18:03,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 07:18:03,851 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 07:18:03,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:18:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2018-11-07 07:18:03,921 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 07:18:03,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 07:18:03,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 07:18:03,921 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 07:18:03,922 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 07:18:03,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 07:18:03,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 07:18:03,922 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 07:18:03,922 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 07:18:08,450 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 07:18:08,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:18:08 BoogieIcfgContainer [2018-11-07 07:18:08,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 07:18:08,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 07:18:08,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 07:18:08,457 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 07:18:08,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:18:02" (1/3) ... [2018-11-07 07:18:08,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@284a30ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:18:08, skipping insertion in model container [2018-11-07 07:18:08,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:18:03" (2/3) ... [2018-11-07 07:18:08,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@284a30ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:18:08, skipping insertion in model container [2018-11-07 07:18:08,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:18:08" (3/3) ... [2018-11-07 07:18:08,461 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label47_true-unreach-call.c [2018-11-07 07:18:08,472 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 07:18:08,482 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 07:18:08,500 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 07:18:08,546 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 07:18:08,546 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 07:18:08,546 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 07:18:08,546 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 07:18:08,546 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 07:18:08,547 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 07:18:08,547 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 07:18:08,547 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 07:18:08,582 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-11-07 07:18:08,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-11-07 07:18:08,603 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:18:08,604 INFO L375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:18:08,607 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:18:08,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:18:08,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1857262073, now seen corresponding path program 1 times [2018-11-07 07:18:08,616 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:18:08,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:18:08,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:18:08,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:18:08,666 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:18:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:18:09,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:18:09,864 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 07:18:09,864 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 07:18:09,865 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:18:09,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 07:18:09,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 07:18:09,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 07:18:09,891 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 4 states. [2018-11-07 07:18:13,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:18:13,205 INFO L93 Difference]: Finished difference Result 1082 states and 1941 transitions. [2018-11-07 07:18:13,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 07:18:13,207 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 204 [2018-11-07 07:18:13,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:18:13,237 INFO L225 Difference]: With dead ends: 1082 [2018-11-07 07:18:13,237 INFO L226 Difference]: Without dead ends: 764 [2018-11-07 07:18:13,245 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 07:18:13,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2018-11-07 07:18:13,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 522. [2018-11-07 07:18:13,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2018-11-07 07:18:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 918 transitions. [2018-11-07 07:18:13,347 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 918 transitions. Word has length 204 [2018-11-07 07:18:13,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:18:13,348 INFO L480 AbstractCegarLoop]: Abstraction has 522 states and 918 transitions. [2018-11-07 07:18:13,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 07:18:13,348 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 918 transitions. [2018-11-07 07:18:13,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-11-07 07:18:13,374 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:18:13,374 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 07:18:13,375 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:18:13,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:18:13,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1605898472, now seen corresponding path program 1 times [2018-11-07 07:18:13,375 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:18:13,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:18:13,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:18:13,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:18:13,377 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:18:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:18:13,735 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 07:18:14,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:18:14,001 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 07:18:14,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 07:18:14,002 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:18:14,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 07:18:14,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 07:18:14,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 07:18:14,006 INFO L87 Difference]: Start difference. First operand 522 states and 918 transitions. Second operand 5 states. [2018-11-07 07:18:18,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:18:18,173 INFO L93 Difference]: Finished difference Result 1610 states and 2933 transitions. [2018-11-07 07:18:18,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 07:18:18,183 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 215 [2018-11-07 07:18:18,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:18:18,197 INFO L225 Difference]: With dead ends: 1610 [2018-11-07 07:18:18,197 INFO L226 Difference]: Without dead ends: 1094 [2018-11-07 07:18:18,202 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 07:18:18,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2018-11-07 07:18:18,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 1071. [2018-11-07 07:18:18,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1071 states. [2018-11-07 07:18:18,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1767 transitions. [2018-11-07 07:18:18,296 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1767 transitions. Word has length 215 [2018-11-07 07:18:18,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:18:18,296 INFO L480 AbstractCegarLoop]: Abstraction has 1071 states and 1767 transitions. [2018-11-07 07:18:18,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 07:18:18,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1767 transitions. [2018-11-07 07:18:18,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-11-07 07:18:18,303 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:18:18,304 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2018-11-07 07:18:18,304 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:18:18,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:18:18,304 INFO L82 PathProgramCache]: Analyzing trace with hash -305112671, now seen corresponding path program 1 times [2018-11-07 07:18:18,305 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:18:18,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:18:18,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:18:18,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:18:18,306 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:18:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:18:18,552 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-11-07 07:18:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 07:18:18,683 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:18:18,683 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:18:18,684 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 226 with the following transitions: [2018-11-07 07:18:18,687 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [13], [16], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1093], [1095], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:18:18,761 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:18:18,761 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:18:20,026 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 07:18:20,028 INFO L272 AbstractInterpreter]: Visited 205 different actions 205 times. Never merged. Never widened. Never found a fixpoint. Largest state had 88 variables. [2018-11-07 07:18:20,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:18:20,072 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 07:18:21,333 INFO L227 lantSequenceWeakener]: Weakened 214 states. On average, predicates are now at 74.91% of their original sizes. [2018-11-07 07:18:21,333 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 07:18:22,557 INFO L415 sIntCurrentIteration]: We unified 224 AI predicates to 224 [2018-11-07 07:18:22,557 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 07:18:22,558 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 07:18:22,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [6] total 23 [2018-11-07 07:18:22,559 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:18:22,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-07 07:18:22,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-07 07:18:22,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2018-11-07 07:18:22,561 INFO L87 Difference]: Start difference. First operand 1071 states and 1767 transitions. Second operand 19 states. [2018-11-07 07:18:37,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:18:37,225 INFO L93 Difference]: Finished difference Result 2346 states and 3856 transitions. [2018-11-07 07:18:37,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 07:18:37,225 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 225 [2018-11-07 07:18:37,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:18:37,233 INFO L225 Difference]: With dead ends: 2346 [2018-11-07 07:18:37,233 INFO L226 Difference]: Without dead ends: 1281 [2018-11-07 07:18:37,236 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 225 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2018-11-07 07:18:37,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2018-11-07 07:18:37,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1279. [2018-11-07 07:18:37,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1279 states. [2018-11-07 07:18:37,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 1984 transitions. [2018-11-07 07:18:37,272 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 1984 transitions. Word has length 225 [2018-11-07 07:18:37,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:18:37,272 INFO L480 AbstractCegarLoop]: Abstraction has 1279 states and 1984 transitions. [2018-11-07 07:18:37,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-07 07:18:37,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 1984 transitions. [2018-11-07 07:18:37,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-11-07 07:18:37,279 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:18:37,279 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2018-11-07 07:18:37,280 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:18:37,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:18:37,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1119915006, now seen corresponding path program 1 times [2018-11-07 07:18:37,280 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:18:37,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:18:37,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:18:37,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:18:37,282 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:18:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:18:37,542 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-11-07 07:18:37,646 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 07:18:37,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:18:37,647 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:18:37,647 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 238 with the following transitions: [2018-11-07 07:18:37,649 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [13], [16], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1093], [1095], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:18:37,661 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:18:37,662 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:18:38,691 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 07:18:38,692 INFO L272 AbstractInterpreter]: Visited 209 different actions 412 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 07:18:38,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:18:38,727 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 07:18:39,480 INFO L227 lantSequenceWeakener]: Weakened 232 states. On average, predicates are now at 75.16% of their original sizes. [2018-11-07 07:18:39,483 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 07:18:40,549 INFO L415 sIntCurrentIteration]: We unified 236 AI predicates to 236 [2018-11-07 07:18:40,550 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 07:18:40,550 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 07:18:40,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [26] imperfect sequences [9] total 33 [2018-11-07 07:18:40,550 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:18:40,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-07 07:18:40,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-07 07:18:40,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2018-11-07 07:18:40,554 INFO L87 Difference]: Start difference. First operand 1279 states and 1984 transitions. Second operand 26 states. [2018-11-07 07:19:02,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:19:02,783 INFO L93 Difference]: Finished difference Result 2558 states and 4077 transitions. [2018-11-07 07:19:02,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-07 07:19:02,784 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 237 [2018-11-07 07:19:02,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:19:02,792 INFO L225 Difference]: With dead ends: 2558 [2018-11-07 07:19:02,792 INFO L226 Difference]: Without dead ends: 1493 [2018-11-07 07:19:02,796 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 245 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2018-11-07 07:19:02,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2018-11-07 07:19:02,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1490. [2018-11-07 07:19:02,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1490 states. [2018-11-07 07:19:02,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 2209 transitions. [2018-11-07 07:19:02,836 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 2209 transitions. Word has length 237 [2018-11-07 07:19:02,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:19:02,836 INFO L480 AbstractCegarLoop]: Abstraction has 1490 states and 2209 transitions. [2018-11-07 07:19:02,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-07 07:19:02,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 2209 transitions. [2018-11-07 07:19:02,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-11-07 07:19:02,843 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:19:02,844 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2018-11-07 07:19:02,844 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:19:02,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:19:02,845 INFO L82 PathProgramCache]: Analyzing trace with hash 743177465, now seen corresponding path program 1 times [2018-11-07 07:19:02,845 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:19:02,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:19:02,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:19:02,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:19:02,846 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:19:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:19:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:19:03,166 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:19:03,166 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:19:03,167 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 238 with the following transitions: [2018-11-07 07:19:03,167 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1093], [1095], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:19:03,175 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:19:03,175 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:19:04,506 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:19:04,506 INFO L272 AbstractInterpreter]: Visited 211 different actions 627 times. Merged at 7 different actions 19 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-07 07:19:04,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:19:04,515 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:19:04,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:19:04,515 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2018-11-07 07:19:04,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:19:04,526 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:19:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:19:04,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:19:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:19:04,964 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:19:05,524 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:19:05,545 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:19:05,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2018-11-07 07:19:05,545 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:19:05,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 07:19:05,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 07:19:05,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-11-07 07:19:05,547 INFO L87 Difference]: Start difference. First operand 1490 states and 2209 transitions. Second operand 8 states. [2018-11-07 07:19:10,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:19:10,067 INFO L93 Difference]: Finished difference Result 4434 states and 7832 transitions. [2018-11-07 07:19:10,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-07 07:19:10,068 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 237 [2018-11-07 07:19:10,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:19:10,096 INFO L225 Difference]: With dead ends: 4434 [2018-11-07 07:19:10,096 INFO L226 Difference]: Without dead ends: 3369 [2018-11-07 07:19:10,108 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2018-11-07 07:19:10,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3369 states. [2018-11-07 07:19:10,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3369 to 3306. [2018-11-07 07:19:10,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3306 states. [2018-11-07 07:19:10,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3306 states to 3306 states and 5021 transitions. [2018-11-07 07:19:10,240 INFO L78 Accepts]: Start accepts. Automaton has 3306 states and 5021 transitions. Word has length 237 [2018-11-07 07:19:10,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:19:10,240 INFO L480 AbstractCegarLoop]: Abstraction has 3306 states and 5021 transitions. [2018-11-07 07:19:10,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-07 07:19:10,241 INFO L276 IsEmpty]: Start isEmpty. Operand 3306 states and 5021 transitions. [2018-11-07 07:19:10,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-11-07 07:19:10,258 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:19:10,258 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 07:19:10,259 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:19:10,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:19:10,259 INFO L82 PathProgramCache]: Analyzing trace with hash 172246987, now seen corresponding path program 1 times [2018-11-07 07:19:10,259 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:19:10,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:19:10,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:19:10,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:19:10,260 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:19:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:19:10,503 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 70 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-07 07:19:10,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:19:10,504 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:19:10,504 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 263 with the following transitions: [2018-11-07 07:19:10,505 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [68], [71], [75], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1093], [1095], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:19:10,511 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:19:10,511 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:19:12,256 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:19:12,256 INFO L272 AbstractInterpreter]: Visited 212 different actions 630 times. Merged at 7 different actions 19 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-07 07:19:12,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:19:12,263 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:19:12,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:19:12,263 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2018-11-07 07:19:12,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:19:12,272 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:19:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:19:12,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:19:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 07:19:12,604 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:19:12,762 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 07:19:12,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:19:12,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-07 07:19:12,784 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:19:12,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 07:19:12,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 07:19:12,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-11-07 07:19:12,785 INFO L87 Difference]: Start difference. First operand 3306 states and 5021 transitions. Second operand 9 states. [2018-11-07 07:19:15,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:19:15,384 INFO L93 Difference]: Finished difference Result 8958 states and 15167 transitions. [2018-11-07 07:19:15,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 07:19:15,385 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 262 [2018-11-07 07:19:15,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:19:15,429 INFO L225 Difference]: With dead ends: 8958 [2018-11-07 07:19:15,429 INFO L226 Difference]: Without dead ends: 6077 [2018-11-07 07:19:15,457 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 524 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2018-11-07 07:19:15,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6077 states. [2018-11-07 07:19:15,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6077 to 5661. [2018-11-07 07:19:15,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5661 states. [2018-11-07 07:19:15,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5661 states to 5661 states and 8476 transitions. [2018-11-07 07:19:15,672 INFO L78 Accepts]: Start accepts. Automaton has 5661 states and 8476 transitions. Word has length 262 [2018-11-07 07:19:15,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:19:15,672 INFO L480 AbstractCegarLoop]: Abstraction has 5661 states and 8476 transitions. [2018-11-07 07:19:15,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 07:19:15,672 INFO L276 IsEmpty]: Start isEmpty. Operand 5661 states and 8476 transitions. [2018-11-07 07:19:15,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-11-07 07:19:15,700 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:19:15,701 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:19:15,701 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:19:15,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:19:15,702 INFO L82 PathProgramCache]: Analyzing trace with hash 601297217, now seen corresponding path program 1 times [2018-11-07 07:19:15,702 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:19:15,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:19:15,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:19:15,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:19:15,703 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:19:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:19:16,120 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 07:19:16,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:19:16,120 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:19:16,121 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 284 with the following transitions: [2018-11-07 07:19:16,121 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [174], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1093], [1095], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:19:16,127 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:19:16,127 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:19:17,661 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:19:17,661 INFO L272 AbstractInterpreter]: Visited 212 different actions 630 times. Merged at 7 different actions 19 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-07 07:19:17,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:19:17,673 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:19:17,673 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:19:17,673 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2018-11-07 07:19:17,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:19:17,683 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:19:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:19:17,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:19:18,194 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 07:19:18,194 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:19:18,490 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 07:19:18,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:19:18,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2018-11-07 07:19:18,515 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:19:18,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 07:19:18,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 07:19:18,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-11-07 07:19:18,517 INFO L87 Difference]: Start difference. First operand 5661 states and 8476 transitions. Second operand 8 states. [2018-11-07 07:19:25,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:19:25,763 INFO L93 Difference]: Finished difference Result 21703 states and 37018 transitions. [2018-11-07 07:19:25,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-07 07:19:25,763 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 283 [2018-11-07 07:19:25,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:19:25,884 INFO L225 Difference]: With dead ends: 21703 [2018-11-07 07:19:25,884 INFO L226 Difference]: Without dead ends: 16497 [2018-11-07 07:19:25,921 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 586 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2018-11-07 07:19:25,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16497 states. [2018-11-07 07:19:26,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16497 to 15959. [2018-11-07 07:19:26,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15959 states. [2018-11-07 07:19:26,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15959 states to 15959 states and 22857 transitions. [2018-11-07 07:19:26,599 INFO L78 Accepts]: Start accepts. Automaton has 15959 states and 22857 transitions. Word has length 283 [2018-11-07 07:19:26,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:19:26,600 INFO L480 AbstractCegarLoop]: Abstraction has 15959 states and 22857 transitions. [2018-11-07 07:19:26,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-07 07:19:26,600 INFO L276 IsEmpty]: Start isEmpty. Operand 15959 states and 22857 transitions. [2018-11-07 07:19:26,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-11-07 07:19:26,672 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:19:26,672 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:19:26,673 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:19:26,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:19:26,673 INFO L82 PathProgramCache]: Analyzing trace with hash -2079012350, now seen corresponding path program 1 times [2018-11-07 07:19:26,673 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:19:26,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:19:26,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:19:26,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:19:26,675 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:19:26,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:19:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:19:27,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:19:27,087 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:19:27,087 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 317 with the following transitions: [2018-11-07 07:19:27,088 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [436], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1093], [1095], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:19:27,092 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:19:27,093 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:19:28,033 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 07:19:28,033 INFO L272 AbstractInterpreter]: Visited 208 different actions 410 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 07:19:28,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:19:28,043 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 07:19:28,883 INFO L227 lantSequenceWeakener]: Weakened 311 states. On average, predicates are now at 74.95% of their original sizes. [2018-11-07 07:19:28,883 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 07:19:29,260 INFO L415 sIntCurrentIteration]: We unified 315 AI predicates to 315 [2018-11-07 07:19:29,261 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 07:19:29,261 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 07:19:29,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [5] total 24 [2018-11-07 07:19:29,262 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:19:29,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-07 07:19:29,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-07 07:19:29,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2018-11-07 07:19:29,263 INFO L87 Difference]: Start difference. First operand 15959 states and 22857 transitions. Second operand 21 states. [2018-11-07 07:19:48,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:19:48,652 INFO L93 Difference]: Finished difference Result 36972 states and 54468 transitions. [2018-11-07 07:19:48,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-07 07:19:48,653 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 316 [2018-11-07 07:19:48,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:19:48,731 INFO L225 Difference]: With dead ends: 36972 [2018-11-07 07:19:48,732 INFO L226 Difference]: Without dead ends: 21438 [2018-11-07 07:19:48,777 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 323 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2018-11-07 07:19:48,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21438 states. [2018-11-07 07:19:49,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21438 to 21333. [2018-11-07 07:19:49,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21333 states. [2018-11-07 07:19:49,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21333 states to 21333 states and 29762 transitions. [2018-11-07 07:19:49,333 INFO L78 Accepts]: Start accepts. Automaton has 21333 states and 29762 transitions. Word has length 316 [2018-11-07 07:19:49,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:19:49,334 INFO L480 AbstractCegarLoop]: Abstraction has 21333 states and 29762 transitions. [2018-11-07 07:19:49,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-07 07:19:49,334 INFO L276 IsEmpty]: Start isEmpty. Operand 21333 states and 29762 transitions. [2018-11-07 07:19:49,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-11-07 07:19:49,407 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:19:49,408 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:19:49,408 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:19:49,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:19:49,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1378315653, now seen corresponding path program 1 times [2018-11-07 07:19:49,409 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:19:49,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:19:49,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:19:49,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:19:49,410 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:19:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:19:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 119 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 07:19:50,570 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:19:50,571 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:19:50,571 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 329 with the following transitions: [2018-11-07 07:19:50,571 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [436], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1093], [1095], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:19:50,576 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:19:50,576 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:19:52,356 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:19:52,356 INFO L272 AbstractInterpreter]: Visited 212 different actions 839 times. Merged at 8 different actions 31 times. Never widened. Found 7 fixpoints after 3 different actions. Largest state had 88 variables. [2018-11-07 07:19:52,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:19:52,364 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:19:52,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:19:52,364 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2018-11-07 07:19:52,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:19:52,375 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:19:52,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:19:52,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:19:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-07 07:19:53,298 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:19:53,510 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-11-07 07:19:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 128 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-07 07:19:53,838 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:19:53,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2018-11-07 07:19:53,838 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:19:53,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 07:19:53,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 07:19:53,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-11-07 07:19:53,839 INFO L87 Difference]: Start difference. First operand 21333 states and 29762 transitions. Second operand 12 states. [2018-11-07 07:20:03,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:20:03,937 INFO L93 Difference]: Finished difference Result 89243 states and 147882 transitions. [2018-11-07 07:20:03,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-07 07:20:03,938 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 328 [2018-11-07 07:20:03,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:20:04,429 INFO L225 Difference]: With dead ends: 89243 [2018-11-07 07:20:04,429 INFO L226 Difference]: Without dead ends: 68334 [2018-11-07 07:20:04,617 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 735 GetRequests, 687 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=497, Invalid=1855, Unknown=0, NotChecked=0, Total=2352 [2018-11-07 07:20:04,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68334 states. [2018-11-07 07:20:06,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68334 to 66724. [2018-11-07 07:20:06,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66724 states. [2018-11-07 07:20:07,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66724 states to 66724 states and 104423 transitions. [2018-11-07 07:20:07,795 INFO L78 Accepts]: Start accepts. Automaton has 66724 states and 104423 transitions. Word has length 328 [2018-11-07 07:20:07,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:20:07,795 INFO L480 AbstractCegarLoop]: Abstraction has 66724 states and 104423 transitions. [2018-11-07 07:20:07,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-07 07:20:07,795 INFO L276 IsEmpty]: Start isEmpty. Operand 66724 states and 104423 transitions. [2018-11-07 07:20:07,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-11-07 07:20:07,974 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:20:07,974 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-11-07 07:20:07,974 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:20:07,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:20:07,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1361035387, now seen corresponding path program 1 times [2018-11-07 07:20:07,975 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:20:07,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:20:07,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:20:07,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:20:07,976 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:20:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:20:08,608 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 07:20:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 152 proven. 45 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-07 07:20:08,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:20:08,863 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:20:08,863 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 341 with the following transitions: [2018-11-07 07:20:08,863 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [174], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [276], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1093], [1095], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:20:08,870 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:20:08,870 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:20:09,829 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:20:09,830 INFO L272 AbstractInterpreter]: Visited 210 different actions 418 times. Merged at 7 different actions 10 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-07 07:20:09,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:20:09,838 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:20:09,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:20:09,838 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2018-11-07 07:20:09,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:20:09,848 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:20:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:20:10,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:20:10,180 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-11-07 07:20:10,180 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:20:10,496 WARN L179 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2018-11-07 07:20:10,869 WARN L179 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 07:20:11,151 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 152 proven. 45 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-07 07:20:11,173 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:20:11,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-07 07:20:11,173 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:20:11,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 07:20:11,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 07:20:11,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-11-07 07:20:11,174 INFO L87 Difference]: Start difference. First operand 66724 states and 104423 transitions. Second operand 7 states. [2018-11-07 07:20:18,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:20:18,293 INFO L93 Difference]: Finished difference Result 213059 states and 346622 transitions. [2018-11-07 07:20:18,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-07 07:20:18,293 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 340 [2018-11-07 07:20:18,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:20:19,367 INFO L225 Difference]: With dead ends: 213059 [2018-11-07 07:20:19,367 INFO L226 Difference]: Without dead ends: 146770 [2018-11-07 07:20:19,816 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 683 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2018-11-07 07:20:19,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146770 states. [2018-11-07 07:20:24,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146770 to 144925. [2018-11-07 07:20:24,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144925 states. [2018-11-07 07:20:25,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144925 states to 144925 states and 212574 transitions. [2018-11-07 07:20:25,218 INFO L78 Accepts]: Start accepts. Automaton has 144925 states and 212574 transitions. Word has length 340 [2018-11-07 07:20:25,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:20:25,219 INFO L480 AbstractCegarLoop]: Abstraction has 144925 states and 212574 transitions. [2018-11-07 07:20:25,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 07:20:25,219 INFO L276 IsEmpty]: Start isEmpty. Operand 144925 states and 212574 transitions. [2018-11-07 07:20:25,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2018-11-07 07:20:25,476 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:20:25,477 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:20:25,477 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:20:25,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:20:25,477 INFO L82 PathProgramCache]: Analyzing trace with hash 2049164094, now seen corresponding path program 1 times [2018-11-07 07:20:25,477 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:20:25,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:20:25,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:20:25,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:20:25,479 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:20:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:20:26,137 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 171 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:20:26,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:20:26,138 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:20:26,138 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 362 with the following transitions: [2018-11-07 07:20:26,139 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [600], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1093], [1095], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:20:26,143 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:20:26,144 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:20:28,069 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:20:28,069 INFO L272 AbstractInterpreter]: Visited 209 different actions 621 times. Merged at 7 different actions 17 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-07 07:20:28,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:20:28,077 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:20:28,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:20:28,077 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2018-11-07 07:20:28,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:20:28,088 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:20:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:20:28,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:20:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 07:20:28,522 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:20:28,691 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 07:20:28,712 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 07:20:28,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-11-07 07:20:28,713 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:20:28,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 07:20:28,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 07:20:28,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-07 07:20:28,715 INFO L87 Difference]: Start difference. First operand 144925 states and 212574 transitions. Second operand 3 states. [2018-11-07 07:20:39,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:20:39,926 INFO L93 Difference]: Finished difference Result 350443 states and 514997 transitions. [2018-11-07 07:20:39,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 07:20:39,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 361 [2018-11-07 07:20:39,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:20:40,972 INFO L225 Difference]: With dead ends: 350443 [2018-11-07 07:20:40,972 INFO L226 Difference]: Without dead ends: 206163 [2018-11-07 07:20:41,376 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 720 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-07 07:20:41,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206163 states. [2018-11-07 07:20:46,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206163 to 204716. [2018-11-07 07:20:46,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204716 states. [2018-11-07 07:20:48,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204716 states to 204716 states and 289953 transitions. [2018-11-07 07:20:48,687 INFO L78 Accepts]: Start accepts. Automaton has 204716 states and 289953 transitions. Word has length 361 [2018-11-07 07:20:48,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:20:48,687 INFO L480 AbstractCegarLoop]: Abstraction has 204716 states and 289953 transitions. [2018-11-07 07:20:48,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 07:20:48,687 INFO L276 IsEmpty]: Start isEmpty. Operand 204716 states and 289953 transitions. [2018-11-07 07:20:48,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2018-11-07 07:20:48,942 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:20:48,942 INFO L375 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:20:48,943 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:20:48,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:20:48,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1554800888, now seen corresponding path program 1 times [2018-11-07 07:20:48,943 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:20:48,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:20:48,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:20:48,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:20:48,944 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:20:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:20:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 235 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:20:49,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:20:49,392 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:20:49,392 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 380 with the following transitions: [2018-11-07 07:20:49,392 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [276], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [460], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1093], [1095], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:20:49,396 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:20:49,397 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:20:49,938 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 07:20:49,938 INFO L272 AbstractInterpreter]: Visited 208 different actions 410 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 07:20:49,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:20:49,954 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 07:20:50,647 INFO L227 lantSequenceWeakener]: Weakened 376 states. On average, predicates are now at 73.77% of their original sizes. [2018-11-07 07:20:50,648 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 07:20:50,913 INFO L415 sIntCurrentIteration]: We unified 378 AI predicates to 378 [2018-11-07 07:20:50,913 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 07:20:50,913 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 07:20:50,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [6] total 23 [2018-11-07 07:20:50,914 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:20:50,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-07 07:20:50,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-07 07:20:50,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2018-11-07 07:20:50,916 INFO L87 Difference]: Start difference. First operand 204716 states and 289953 transitions. Second operand 19 states. [2018-11-07 07:21:19,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:21:19,301 INFO L93 Difference]: Finished difference Result 398534 states and 551412 transitions. [2018-11-07 07:21:19,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-07 07:21:19,301 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 379 [2018-11-07 07:21:19,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:21:20,537 INFO L225 Difference]: With dead ends: 398534 [2018-11-07 07:21:20,537 INFO L226 Difference]: Without dead ends: 204852 [2018-11-07 07:21:21,828 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 387 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2018-11-07 07:21:21,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204852 states. [2018-11-07 07:21:26,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204852 to 204846. [2018-11-07 07:21:26,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204846 states. [2018-11-07 07:21:26,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204846 states to 204846 states and 289653 transitions. [2018-11-07 07:21:26,870 INFO L78 Accepts]: Start accepts. Automaton has 204846 states and 289653 transitions. Word has length 379 [2018-11-07 07:21:26,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:21:26,870 INFO L480 AbstractCegarLoop]: Abstraction has 204846 states and 289653 transitions. [2018-11-07 07:21:26,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-07 07:21:26,871 INFO L276 IsEmpty]: Start isEmpty. Operand 204846 states and 289653 transitions. [2018-11-07 07:21:27,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2018-11-07 07:21:27,117 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:21:27,118 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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] [2018-11-07 07:21:27,118 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:21:27,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:21:27,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1463990041, now seen corresponding path program 1 times [2018-11-07 07:21:27,119 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:21:27,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:21:27,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:21:27,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:21:27,120 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:21:27,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:21:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 178 proven. 76 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-07 07:21:27,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:21:27,596 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:21:27,596 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 386 with the following transitions: [2018-11-07 07:21:27,596 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [276], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [436], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1093], [1095], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:21:27,601 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:21:27,601 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:21:29,992 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:21:29,992 INFO L272 AbstractInterpreter]: Visited 210 different actions 840 times. Merged at 8 different actions 36 times. Widened at 1 different actions 1 times. Found 7 fixpoints after 3 different actions. Largest state had 88 variables. [2018-11-07 07:21:29,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:21:29,998 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:21:29,998 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:21:29,998 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2018-11-07 07:21:30,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:21:30,008 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:21:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:21:30,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:21:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-11-07 07:21:30,342 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:21:30,495 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 187 proven. 11 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-11-07 07:21:30,516 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:21:30,517 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2018-11-07 07:21:30,517 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:21:30,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-07 07:21:30,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-07 07:21:30,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-11-07 07:21:30,519 INFO L87 Difference]: Start difference. First operand 204846 states and 289653 transitions. Second operand 11 states. Received shutdown request... [2018-11-07 07:21:31,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 07:21:31,179 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 07:21:31,186 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 07:21:31,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 07:21:31 BoogieIcfgContainer [2018-11-07 07:21:31,186 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 07:21:31,187 INFO L168 Benchmark]: Toolchain (without parser) took 208974.61 ms. Allocated memory was 1.5 GB in the beginning and 4.7 GB in the end (delta: 3.2 GB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 287.5 MB). Peak memory consumption was 3.5 GB. Max. memory is 7.1 GB. [2018-11-07 07:21:31,188 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 07:21:31,189 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1247.94 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2018-11-07 07:21:31,190 INFO L168 Benchmark]: Boogie Procedure Inliner took 204.19 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 739.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -855.0 MB). Peak memory consumption was 39.3 MB. Max. memory is 7.1 GB. [2018-11-07 07:21:31,191 INFO L168 Benchmark]: Boogie Preprocessor took 183.27 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 07:21:31,191 INFO L168 Benchmark]: RCFGBuilder took 4600.66 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 260.2 MB). Peak memory consumption was 260.2 MB. Max. memory is 7.1 GB. [2018-11-07 07:21:31,192 INFO L168 Benchmark]: TraceAbstraction took 202733.46 ms. Allocated memory was 2.3 GB in the beginning and 4.7 GB in the end (delta: 2.5 GB). Free memory was 1.9 GB in the beginning and 1.1 GB in the end (delta: 808.4 MB). Peak memory consumption was 3.3 GB. Max. memory is 7.1 GB. [2018-11-07 07:21:31,197 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1247.94 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 204.19 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 739.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -855.0 MB). Peak memory consumption was 39.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 183.27 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 4600.66 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 260.2 MB). Peak memory consumption was 260.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 202733.46 ms. Allocated memory was 2.3 GB in the beginning and 4.7 GB in the end (delta: 2.5 GB). Free memory was 1.9 GB in the beginning and 1.1 GB in the end (delta: 808.4 MB). Peak memory consumption was 3.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1626]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1626). Cancelled while BasicCegarLoop was constructing difference of abstraction (204846states) and FLOYD_HOARE automaton (currently 9 states, 11 states before enhancement),while ReachableStatesComputation was computing reachable states (315 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 202.6s OverallTime, 13 OverallIterations, 4 TraceHistogramMax, 142.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2769 SDtfs, 25908 SDslu, 4707 SDs, 0 SdLazy, 29097 SolverSat, 5758 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 63.1s Time, PredicateUnifierStatistics: 8 DeclaredPredicates, 5792 GetRequests, 5526 SyntacticMatches, 10 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 10.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=204846occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 15.7s AbstIntTime, 11 AbstIntIterations, 4 AbstIntStrong, 0.9992268446976882 AbsIntWeakeningRatio, 0.23503902862098872 AbsIntAvgWeakeningVarsNumRemoved, 58.902862098872504 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 22.7s AutomataMinimizationTime, 12 MinimizatonAttempts, 6300 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 10.4s InterpolantComputationTime, 5968 NumberOfCodeBlocks, 5968 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 8137 ConstructedInterpolants, 0 QuantifiedInterpolants, 5634219 SizeOfPredicates, 13 NumberOfNonLiveVariables, 8714 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 27 InterpolantComputations, 4 PerfectInterpolantSequences, 3239/3500 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown