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/Problem10_label56_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 08:25:45,266 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 08:25:45,268 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 08:25:45,286 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 08:25:45,286 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 08:25:45,287 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 08:25:45,288 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 08:25:45,290 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 08:25:45,292 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 08:25:45,293 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 08:25:45,294 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 08:25:45,294 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 08:25:45,295 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 08:25:45,296 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 08:25:45,297 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 08:25:45,298 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 08:25:45,298 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 08:25:45,300 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 08:25:45,302 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 08:25:45,304 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 08:25:45,305 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 08:25:45,306 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 08:25:45,308 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 08:25:45,309 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 08:25:45,309 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 08:25:45,310 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 08:25:45,311 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 08:25:45,311 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 08:25:45,312 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 08:25:45,313 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 08:25:45,313 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 08:25:45,314 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 08:25:45,314 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 08:25:45,315 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 08:25:45,316 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 08:25:45,317 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 08:25:45,317 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 08:25:45,345 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 08:25:45,345 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 08:25:45,346 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 08:25:45,346 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 08:25:45,347 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 08:25:45,349 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 08:25:45,349 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-07 08:25:45,349 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 08:25:45,349 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 08:25:45,350 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 08:25:45,350 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 08:25:45,350 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 08:25:45,350 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 08:25:45,350 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-07 08:25:45,351 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 08:25:45,351 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 08:25:45,351 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 08:25:45,351 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 08:25:45,352 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 08:25:45,352 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 08:25:45,352 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 08:25:45,352 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 08:25:45,352 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 08:25:45,353 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 08:25:45,353 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 08:25:45,353 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 08:25:45,353 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 08:25:45,353 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 08:25:45,354 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 08:25:45,354 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 08:25:45,354 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 08:25:45,354 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 08:25:45,354 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 08:25:45,355 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 08:25:45,355 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 08:25:45,355 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 08:25:45,396 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 08:25:45,411 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 08:25:45,417 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 08:25:45,419 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 08:25:45,419 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 08:25:45,420 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label56_true-unreach-call.c [2018-11-07 08:25:45,488 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7f036813/4f8d759a1bda43528c5c92442b21bd3d/FLAGe1db7bfeb [2018-11-07 08:25:46,110 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 08:25:46,111 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label56_true-unreach-call.c [2018-11-07 08:25:46,127 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7f036813/4f8d759a1bda43528c5c92442b21bd3d/FLAGe1db7bfeb [2018-11-07 08:25:46,143 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7f036813/4f8d759a1bda43528c5c92442b21bd3d [2018-11-07 08:25:46,154 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 08:25:46,156 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 08:25:46,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 08:25:46,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 08:25:46,161 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 08:25:46,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:25:46" (1/1) ... [2018-11-07 08:25:46,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@567b4d96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:46, skipping insertion in model container [2018-11-07 08:25:46,168 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:25:46" (1/1) ... [2018-11-07 08:25:46,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 08:25:46,261 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 08:25:46,706 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 08:25:46,711 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 08:25:46,864 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 08:25:46,886 INFO L193 MainTranslator]: Completed translation [2018-11-07 08:25:46,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:46 WrapperNode [2018-11-07 08:25:46,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 08:25:46,887 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 08:25:46,887 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 08:25:46,888 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 08:25:46,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:46" (1/1) ... [2018-11-07 08:25:46,926 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:46" (1/1) ... [2018-11-07 08:25:47,026 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 08:25:47,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 08:25:47,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 08:25:47,026 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 08:25:47,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:46" (1/1) ... [2018-11-07 08:25:47,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:46" (1/1) ... [2018-11-07 08:25:47,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:46" (1/1) ... [2018-11-07 08:25:47,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:46" (1/1) ... [2018-11-07 08:25:47,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:46" (1/1) ... [2018-11-07 08:25:47,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:46" (1/1) ... [2018-11-07 08:25:47,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:46" (1/1) ... [2018-11-07 08:25:47,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 08:25:47,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 08:25:47,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 08:25:47,119 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 08:25:47,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:46" (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 08:25:47,189 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 08:25:47,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 08:25:47,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 08:25:47,190 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 08:25:47,190 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 08:25:47,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 08:25:47,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 08:25:47,190 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 08:25:47,191 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 08:25:50,572 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 08:25:50,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:25:50 BoogieIcfgContainer [2018-11-07 08:25:50,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 08:25:50,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 08:25:50,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 08:25:50,577 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 08:25:50,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:25:46" (1/3) ... [2018-11-07 08:25:50,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17fc28a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:25:50, skipping insertion in model container [2018-11-07 08:25:50,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:46" (2/3) ... [2018-11-07 08:25:50,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17fc28a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:25:50, skipping insertion in model container [2018-11-07 08:25:50,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:25:50" (3/3) ... [2018-11-07 08:25:50,581 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem10_label56_true-unreach-call.c [2018-11-07 08:25:50,591 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 08:25:50,599 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 08:25:50,615 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 08:25:50,655 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 08:25:50,656 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 08:25:50,656 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 08:25:50,656 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 08:25:50,656 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 08:25:50,657 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 08:25:50,657 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 08:25:50,657 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 08:25:50,690 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states. [2018-11-07 08:25:50,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-11-07 08:25:50,704 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:25:50,706 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] [2018-11-07 08:25:50,708 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:25:50,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:25:50,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1189398212, now seen corresponding path program 1 times [2018-11-07 08:25:50,720 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:25:50,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:25:50,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:25:50,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:25:50,776 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:25:50,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:25:51,203 WARN L179 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 08:25:51,315 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 08:25:51,317 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 08:25:51,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 08:25:51,318 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:25:51,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 08:25:51,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 08:25:51,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 08:25:51,343 INFO L87 Difference]: Start difference. First operand 216 states. Second operand 3 states. [2018-11-07 08:25:53,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:25:53,066 INFO L93 Difference]: Finished difference Result 574 states and 992 transitions. [2018-11-07 08:25:53,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 08:25:53,070 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2018-11-07 08:25:53,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:25:53,090 INFO L225 Difference]: With dead ends: 574 [2018-11-07 08:25:53,090 INFO L226 Difference]: Without dead ends: 356 [2018-11-07 08:25:53,098 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 08:25:53,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2018-11-07 08:25:53,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 356. [2018-11-07 08:25:53,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2018-11-07 08:25:53,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 607 transitions. [2018-11-07 08:25:53,225 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 607 transitions. Word has length 30 [2018-11-07 08:25:53,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:25:53,226 INFO L480 AbstractCegarLoop]: Abstraction has 356 states and 607 transitions. [2018-11-07 08:25:53,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 08:25:53,227 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 607 transitions. [2018-11-07 08:25:53,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-11-07 08:25:53,240 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:25:53,240 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:25:53,241 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:25:53,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:25:53,241 INFO L82 PathProgramCache]: Analyzing trace with hash 536301288, now seen corresponding path program 1 times [2018-11-07 08:25:53,242 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:25:53,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:25:53,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:25:53,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:25:53,244 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:25:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:25:53,687 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 08:25:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-07 08:25:53,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:25:53,736 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:25:53,737 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 119 with the following transitions: [2018-11-07 08:25:53,739 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [141], [143], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [566], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 08:25:53,799 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:25:53,799 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:25:54,378 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 08:25:54,381 INFO L272 AbstractInterpreter]: Visited 92 different actions 92 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 08:25:54,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:25:54,391 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 08:25:54,787 INFO L227 lantSequenceWeakener]: Weakened 112 states. On average, predicates are now at 73.03% of their original sizes. [2018-11-07 08:25:54,787 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 08:25:55,032 INFO L415 sIntCurrentIteration]: We unified 117 AI predicates to 117 [2018-11-07 08:25:55,033 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 08:25:55,034 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 08:25:55,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 8 [2018-11-07 08:25:55,034 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:25:55,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 08:25:55,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 08:25:55,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 08:25:55,037 INFO L87 Difference]: Start difference. First operand 356 states and 607 transitions. Second operand 6 states. [2018-11-07 08:26:07,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:26:07,304 INFO L93 Difference]: Finished difference Result 852 states and 1471 transitions. [2018-11-07 08:26:07,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 08:26:07,305 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 118 [2018-11-07 08:26:07,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:26:07,310 INFO L225 Difference]: With dead ends: 852 [2018-11-07 08:26:07,310 INFO L226 Difference]: Without dead ends: 502 [2018-11-07 08:26:07,314 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-07 08:26:07,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2018-11-07 08:26:07,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 500. [2018-11-07 08:26:07,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2018-11-07 08:26:07,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 757 transitions. [2018-11-07 08:26:07,345 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 757 transitions. Word has length 118 [2018-11-07 08:26:07,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:26:07,346 INFO L480 AbstractCegarLoop]: Abstraction has 500 states and 757 transitions. [2018-11-07 08:26:07,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 08:26:07,346 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 757 transitions. [2018-11-07 08:26:07,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-11-07 08:26:07,352 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:26:07,353 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 08:26:07,353 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:26:07,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:26:07,354 INFO L82 PathProgramCache]: Analyzing trace with hash -524938665, now seen corresponding path program 1 times [2018-11-07 08:26:07,354 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:26:07,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:26:07,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:26:07,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:26:07,356 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:26:07,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:26:07,760 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-11-07 08:26:07,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:26:07,760 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:26:07,761 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 190 with the following transitions: [2018-11-07 08:26:07,761 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [141], [143], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [498], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [566], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 08:26:07,767 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:26:07,768 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:26:09,183 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 08:26:09,183 INFO L272 AbstractInterpreter]: Visited 96 different actions 283 times. Merged at 7 different actions 17 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 08:26:09,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:26:09,199 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 08:26:10,028 INFO L227 lantSequenceWeakener]: Weakened 186 states. On average, predicates are now at 75.37% of their original sizes. [2018-11-07 08:26:10,029 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 08:26:10,209 INFO L415 sIntCurrentIteration]: We unified 188 AI predicates to 188 [2018-11-07 08:26:10,209 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 08:26:10,213 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 08:26:10,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [4] total 11 [2018-11-07 08:26:10,213 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:26:10,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 08:26:10,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 08:26:10,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-11-07 08:26:10,214 INFO L87 Difference]: Start difference. First operand 500 states and 757 transitions. Second operand 9 states. [2018-11-07 08:26:39,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:26:39,610 INFO L93 Difference]: Finished difference Result 1241 states and 2087 transitions. [2018-11-07 08:26:39,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-07 08:26:39,610 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 189 [2018-11-07 08:26:39,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:26:39,616 INFO L225 Difference]: With dead ends: 1241 [2018-11-07 08:26:39,616 INFO L226 Difference]: Without dead ends: 891 [2018-11-07 08:26:39,619 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 195 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2018-11-07 08:26:39,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2018-11-07 08:26:39,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 869. [2018-11-07 08:26:39,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 869 states. [2018-11-07 08:26:39,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1221 transitions. [2018-11-07 08:26:39,655 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1221 transitions. Word has length 189 [2018-11-07 08:26:39,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:26:39,656 INFO L480 AbstractCegarLoop]: Abstraction has 869 states and 1221 transitions. [2018-11-07 08:26:39,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 08:26:39,657 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1221 transitions. [2018-11-07 08:26:39,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-11-07 08:26:39,664 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:26:39,665 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 08:26:39,665 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:26:39,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:26:39,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1798990704, now seen corresponding path program 1 times [2018-11-07 08:26:39,665 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:26:39,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:26:39,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:26:39,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:26:39,667 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:26:39,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:26:40,231 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 124 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:26:40,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:26:40,232 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:26:40,232 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 237 with the following transitions: [2018-11-07 08:26:40,232 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [141], [143], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [718], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 08:26:40,238 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:26:40,238 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:26:40,378 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:26:40,379 INFO L272 AbstractInterpreter]: Visited 135 different actions 268 times. Merged at 7 different actions 10 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 08:26:40,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:26:40,412 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:26:40,412 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:26:40,413 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 08:26:40,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:26:40,518 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:26:40,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:26:40,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:26:40,923 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 124 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:26:40,924 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:26:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 124 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:26:41,755 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 08:26:41,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-07 08:26:41,756 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 08:26:41,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 08:26:41,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 08:26:41,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-11-07 08:26:41,759 INFO L87 Difference]: Start difference. First operand 869 states and 1221 transitions. Second operand 9 states. [2018-11-07 08:26:47,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:26:47,325 INFO L93 Difference]: Finished difference Result 2276 states and 3640 transitions. [2018-11-07 08:26:47,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-07 08:26:47,326 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 236 [2018-11-07 08:26:47,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:26:47,336 INFO L225 Difference]: With dead ends: 2276 [2018-11-07 08:26:47,337 INFO L226 Difference]: Without dead ends: 1183 [2018-11-07 08:26:47,351 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 475 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2018-11-07 08:26:47,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2018-11-07 08:26:47,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 1153. [2018-11-07 08:26:47,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1153 states. [2018-11-07 08:26:47,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1372 transitions. [2018-11-07 08:26:47,395 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1372 transitions. Word has length 236 [2018-11-07 08:26:47,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:26:47,396 INFO L480 AbstractCegarLoop]: Abstraction has 1153 states and 1372 transitions. [2018-11-07 08:26:47,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 08:26:47,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1372 transitions. [2018-11-07 08:26:47,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-11-07 08:26:47,402 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:26:47,402 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 08:26:47,403 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:26:47,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:26:47,403 INFO L82 PathProgramCache]: Analyzing trace with hash 496686056, now seen corresponding path program 1 times [2018-11-07 08:26:47,403 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:26:47,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:26:47,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:26:47,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:26:47,405 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:26:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:26:47,707 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 08:26:48,144 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 47 proven. 46 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-07 08:26:48,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:26:48,145 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:26:48,145 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 273 with the following transitions: [2018-11-07 08:26:48,145 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [141], [143], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [678], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [718], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 08:26:48,152 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:26:48,152 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:26:48,403 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 08:26:48,404 INFO L272 AbstractInterpreter]: Visited 134 different actions 262 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 08:26:48,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:26:48,441 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 08:26:48,781 INFO L227 lantSequenceWeakener]: Weakened 269 states. On average, predicates are now at 77.77% of their original sizes. [2018-11-07 08:26:48,781 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 08:26:49,566 INFO L415 sIntCurrentIteration]: We unified 271 AI predicates to 271 [2018-11-07 08:26:49,566 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 08:26:49,566 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 08:26:49,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2018-11-07 08:26:49,567 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:26:49,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 08:26:49,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 08:26:49,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-11-07 08:26:49,574 INFO L87 Difference]: Start difference. First operand 1153 states and 1372 transitions. Second operand 10 states. [2018-11-07 08:27:14,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:27:14,390 INFO L93 Difference]: Finished difference Result 2400 states and 2970 transitions. [2018-11-07 08:27:14,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-07 08:27:14,391 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 272 [2018-11-07 08:27:14,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:27:14,399 INFO L225 Difference]: With dead ends: 2400 [2018-11-07 08:27:14,399 INFO L226 Difference]: Without dead ends: 1397 [2018-11-07 08:27:14,403 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 282 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2018-11-07 08:27:14,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2018-11-07 08:27:14,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1348. [2018-11-07 08:27:14,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1348 states. [2018-11-07 08:27:14,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 1590 transitions. [2018-11-07 08:27:14,444 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 1590 transitions. Word has length 272 [2018-11-07 08:27:14,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:27:14,446 INFO L480 AbstractCegarLoop]: Abstraction has 1348 states and 1590 transitions. [2018-11-07 08:27:14,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 08:27:14,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 1590 transitions. [2018-11-07 08:27:14,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-11-07 08:27:14,452 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:27:14,452 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:27:14,452 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:27:14,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:27:14,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1221156648, now seen corresponding path program 1 times [2018-11-07 08:27:14,453 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:27:14,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:27:14,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:27:14,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:27:14,455 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:27:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:27:15,153 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2018-11-07 08:27:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 143 proven. 87 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-07 08:27:15,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:27:15,560 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:27:15,560 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 281 with the following transitions: [2018-11-07 08:27:15,561 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [141], [143], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [498], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [566], [567], [571], [575], [578], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 08:27:15,564 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:27:15,564 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:27:17,035 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:27:17,035 INFO L272 AbstractInterpreter]: Visited 101 different actions 402 times. Merged at 8 different actions 34 times. Widened at 1 different actions 1 times. Found 7 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 08:27:17,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:27:17,041 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:27:17,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:27:17,041 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 08:27:17,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:27:17,050 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:27:17,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:27:17,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:27:17,361 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2018-11-07 08:27:17,361 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:27:17,693 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2018-11-07 08:27:17,725 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 08:27:17,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [14] total 16 [2018-11-07 08:27:17,725 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:27:17,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 08:27:17,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 08:27:17,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2018-11-07 08:27:17,727 INFO L87 Difference]: Start difference. First operand 1348 states and 1590 transitions. Second operand 3 states. [2018-11-07 08:27:18,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:27:18,860 INFO L93 Difference]: Finished difference Result 3570 states and 4309 transitions. [2018-11-07 08:27:18,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 08:27:18,861 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 280 [2018-11-07 08:27:18,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:27:18,873 INFO L225 Difference]: With dead ends: 3570 [2018-11-07 08:27:18,874 INFO L226 Difference]: Without dead ends: 2079 [2018-11-07 08:27:18,879 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 558 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2018-11-07 08:27:18,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2018-11-07 08:27:18,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 2079. [2018-11-07 08:27:18,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2079 states. [2018-11-07 08:27:18,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 2446 transitions. [2018-11-07 08:27:18,936 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 2446 transitions. Word has length 280 [2018-11-07 08:27:18,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:27:18,937 INFO L480 AbstractCegarLoop]: Abstraction has 2079 states and 2446 transitions. [2018-11-07 08:27:18,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 08:27:18,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 2446 transitions. [2018-11-07 08:27:18,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-11-07 08:27:18,944 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:27:18,944 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 08:27:18,944 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:27:18,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:27:18,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1270182200, now seen corresponding path program 1 times [2018-11-07 08:27:18,945 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:27:18,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:27:18,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:27:18,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:27:18,946 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:27:18,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:27:19,636 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-11-07 08:27:19,636 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:27:19,636 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:27:19,637 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 289 with the following transitions: [2018-11-07 08:27:19,637 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [141], [143], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [678], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [782], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 08:27:19,641 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:27:19,641 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:27:19,863 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:27:19,863 INFO L272 AbstractInterpreter]: Visited 151 different actions 443 times. Merged at 7 different actions 14 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 08:27:19,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:27:19,869 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:27:19,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:27:19,869 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 08:27:19,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:27:19,884 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:27:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:27:19,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:27:20,753 WARN L179 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 20 [2018-11-07 08:27:21,127 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2018-11-07 08:27:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 5 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:27:21,465 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:27:22,084 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2018-11-07 08:27:23,278 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 1670