java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-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/Problem15_label19_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 08:11:15,569 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 08:11:15,572 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 08:11:15,587 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 08:11:15,588 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 08:11:15,590 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 08:11:15,591 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 08:11:15,594 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 08:11:15,595 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 08:11:15,596 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 08:11:15,599 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 08:11:15,599 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 08:11:15,600 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 08:11:15,601 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 08:11:15,603 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 08:11:15,606 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 08:11:15,607 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 08:11:15,616 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 08:11:15,618 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 08:11:15,623 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 08:11:15,627 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 08:11:15,628 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 08:11:15,633 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 08:11:15,633 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 08:11:15,634 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 08:11:15,634 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 08:11:15,638 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 08:11:15,638 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 08:11:15,639 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 08:11:15,643 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 08:11:15,644 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 08:11:15,644 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 08:11:15,644 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 08:11:15,645 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 08:11:15,646 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 08:11:15,647 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 08:11:15,647 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-27 08:11:15,678 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 08:11:15,679 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 08:11:15,680 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 08:11:15,680 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 08:11:15,681 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 08:11:15,681 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 08:11:15,681 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-27 08:11:15,681 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 08:11:15,682 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 08:11:15,682 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 08:11:15,682 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 08:11:15,682 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 08:11:15,683 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 08:11:15,683 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 08:11:15,683 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 08:11:15,684 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 08:11:15,684 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 08:11:15,684 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 08:11:15,684 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 08:11:15,684 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 08:11:15,685 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 08:11:15,686 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 08:11:15,686 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 08:11:15,686 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 08:11:15,687 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 08:11:15,687 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 08:11:15,687 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 08:11:15,687 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 08:11:15,687 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 08:11:15,687 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 08:11:15,688 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 08:11:15,688 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 08:11:15,688 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 08:11:15,688 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 08:11:15,689 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 08:11:15,689 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 08:11:15,734 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 08:11:15,751 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 08:11:15,755 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 08:11:15,756 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 08:11:15,757 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 08:11:15,758 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label19_true-unreach-call.c [2018-10-27 08:11:15,815 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cb625cf95/2d0064afe5b64ce5b36bf2434907badd/FLAG98171bc0a [2018-10-27 08:11:16,521 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 08:11:16,522 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label19_true-unreach-call.c [2018-10-27 08:11:16,548 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cb625cf95/2d0064afe5b64ce5b36bf2434907badd/FLAG98171bc0a [2018-10-27 08:11:16,568 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cb625cf95/2d0064afe5b64ce5b36bf2434907badd [2018-10-27 08:11:16,580 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 08:11:16,583 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 08:11:16,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 08:11:16,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 08:11:16,588 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 08:11:16,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:11:16" (1/1) ... [2018-10-27 08:11:16,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@769a0e85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:16, skipping insertion in model container [2018-10-27 08:11:16,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:11:16" (1/1) ... [2018-10-27 08:11:16,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 08:11:16,716 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 08:11:17,665 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 08:11:17,669 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 08:11:17,941 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 08:11:17,965 INFO L193 MainTranslator]: Completed translation [2018-10-27 08:11:17,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:17 WrapperNode [2018-10-27 08:11:17,965 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 08:11:17,966 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 08:11:17,967 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 08:11:17,967 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 08:11:17,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:17" (1/1) ... [2018-10-27 08:11:18,028 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:17" (1/1) ... [2018-10-27 08:11:18,355 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 08:11:18,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 08:11:18,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 08:11:18,356 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 08:11:18,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:17" (1/1) ... [2018-10-27 08:11:18,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:17" (1/1) ... [2018-10-27 08:11:18,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:17" (1/1) ... [2018-10-27 08:11:18,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:17" (1/1) ... [2018-10-27 08:11:18,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:17" (1/1) ... [2018-10-27 08:11:18,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:17" (1/1) ... [2018-10-27 08:11:18,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:17" (1/1) ... [2018-10-27 08:11:18,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 08:11:18,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 08:11:18,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 08:11:18,555 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 08:11:18,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 08:11:18,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 08:11:18,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 08:11:18,625 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 08:11:18,625 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 08:11:18,625 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 08:11:18,625 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 08:11:18,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 08:11:18,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 08:11:18,626 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 08:11:18,626 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 08:11:24,931 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 08:11:24,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:11:24 BoogieIcfgContainer [2018-10-27 08:11:24,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 08:11:24,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 08:11:24,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 08:11:24,939 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 08:11:24,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:11:16" (1/3) ... [2018-10-27 08:11:24,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4213d55c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:11:24, skipping insertion in model container [2018-10-27 08:11:24,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:17" (2/3) ... [2018-10-27 08:11:24,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4213d55c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:11:24, skipping insertion in model container [2018-10-27 08:11:24,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:11:24" (3/3) ... [2018-10-27 08:11:24,944 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label19_true-unreach-call.c [2018-10-27 08:11:24,954 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 08:11:24,965 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 08:11:24,984 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 08:11:25,033 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 08:11:25,033 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 08:11:25,033 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 08:11:25,034 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 08:11:25,034 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 08:11:25,034 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 08:11:25,034 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 08:11:25,034 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 08:11:25,067 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states. [2018-10-27 08:11:25,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-27 08:11:25,077 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:11:25,078 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] [2018-10-27 08:11:25,081 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:11:25,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:11:25,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1227807684, now seen corresponding path program 1 times [2018-10-27 08:11:25,089 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:11:25,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:11:25,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:11:25,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:11:25,144 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:11:25,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:11:25,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:11:25,634 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:11:25,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 08:11:25,634 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:11:25,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 08:11:25,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 08:11:25,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:11:25,661 INFO L87 Difference]: Start difference. First operand 438 states. Second operand 4 states. [2018-10-27 08:11:33,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:11:33,349 INFO L93 Difference]: Finished difference Result 1558 states and 2849 transitions. [2018-10-27 08:11:33,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 08:11:33,351 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2018-10-27 08:11:33,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:11:33,380 INFO L225 Difference]: With dead ends: 1558 [2018-10-27 08:11:33,380 INFO L226 Difference]: Without dead ends: 1114 [2018-10-27 08:11:33,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:11:33,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2018-10-27 08:11:33,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 759. [2018-10-27 08:11:33,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 759 states. [2018-10-27 08:11:33,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1355 transitions. [2018-10-27 08:11:33,544 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1355 transitions. Word has length 52 [2018-10-27 08:11:33,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:11:33,545 INFO L481 AbstractCegarLoop]: Abstraction has 759 states and 1355 transitions. [2018-10-27 08:11:33,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 08:11:33,546 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1355 transitions. [2018-10-27 08:11:33,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-27 08:11:33,560 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:11:33,561 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, 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] [2018-10-27 08:11:33,561 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:11:33,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:11:33,562 INFO L82 PathProgramCache]: Analyzing trace with hash -773066201, now seen corresponding path program 1 times [2018-10-27 08:11:33,562 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:11:33,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:11:33,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:11:33,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:11:33,565 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:11:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:11:33,918 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:11:33,918 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:11:33,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 08:11:33,919 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:11:33,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 08:11:33,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 08:11:33,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 08:11:33,922 INFO L87 Difference]: Start difference. First operand 759 states and 1355 transitions. Second operand 5 states. [2018-10-27 08:11:47,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:11:47,498 INFO L93 Difference]: Finished difference Result 2506 states and 4577 transitions. [2018-10-27 08:11:47,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 08:11:47,499 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 122 [2018-10-27 08:11:47,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:11:47,513 INFO L225 Difference]: With dead ends: 2506 [2018-10-27 08:11:47,514 INFO L226 Difference]: Without dead ends: 1753 [2018-10-27 08:11:47,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-27 08:11:47,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2018-10-27 08:11:47,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 1733. [2018-10-27 08:11:47,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1733 states. [2018-10-27 08:11:47,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 3007 transitions. [2018-10-27 08:11:47,617 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 3007 transitions. Word has length 122 [2018-10-27 08:11:47,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:11:47,618 INFO L481 AbstractCegarLoop]: Abstraction has 1733 states and 3007 transitions. [2018-10-27 08:11:47,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 08:11:47,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 3007 transitions. [2018-10-27 08:11:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-27 08:11:47,627 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:11:47,627 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, 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] [2018-10-27 08:11:47,627 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:11:47,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:11:47,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1495807734, now seen corresponding path program 1 times [2018-10-27 08:11:47,630 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:11:47,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:11:47,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:11:47,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:11:47,632 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:11:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:11:48,236 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2018-10-27 08:11:48,272 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:11:48,273 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:11:48,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 08:11:48,273 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:11:48,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 08:11:48,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 08:11:48,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-27 08:11:48,278 INFO L87 Difference]: Start difference. First operand 1733 states and 3007 transitions. Second operand 6 states. [2018-10-27 08:12:04,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:12:04,169 INFO L93 Difference]: Finished difference Result 5661 states and 10509 transitions. [2018-10-27 08:12:04,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-27 08:12:04,170 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2018-10-27 08:12:04,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:12:04,208 INFO L225 Difference]: With dead ends: 5661 [2018-10-27 08:12:04,208 INFO L226 Difference]: Without dead ends: 3934 [2018-10-27 08:12:04,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-27 08:12:04,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3934 states. [2018-10-27 08:12:04,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3934 to 3824. [2018-10-27 08:12:04,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3824 states. [2018-10-27 08:12:04,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3824 states to 3824 states and 5804 transitions. [2018-10-27 08:12:04,403 INFO L78 Accepts]: Start accepts. Automaton has 3824 states and 5804 transitions. Word has length 123 [2018-10-27 08:12:04,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:12:04,403 INFO L481 AbstractCegarLoop]: Abstraction has 3824 states and 5804 transitions. [2018-10-27 08:12:04,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 08:12:04,404 INFO L276 IsEmpty]: Start isEmpty. Operand 3824 states and 5804 transitions. [2018-10-27 08:12:04,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-27 08:12:04,408 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:12:04,408 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, 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] [2018-10-27 08:12:04,408 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:12:04,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:12:04,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1360707218, now seen corresponding path program 1 times [2018-10-27 08:12:04,409 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:12:04,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:12:04,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:12:04,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:12:04,414 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:12:04,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:12:04,692 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 08:12:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:12:04,798 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:12:04,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 08:12:04,799 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:12:04,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 08:12:04,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 08:12:04,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 08:12:04,800 INFO L87 Difference]: Start difference. First operand 3824 states and 5804 transitions. Second operand 6 states. [2018-10-27 08:12:12,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:12:12,744 INFO L93 Difference]: Finished difference Result 10749 states and 17624 transitions. [2018-10-27 08:12:12,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 08:12:12,744 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 127 [2018-10-27 08:12:12,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:12:12,788 INFO L225 Difference]: With dead ends: 10749 [2018-10-27 08:12:12,789 INFO L226 Difference]: Without dead ends: 7240 [2018-10-27 08:12:12,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 08:12:12,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7240 states. [2018-10-27 08:12:13,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7240 to 7187. [2018-10-27 08:12:13,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7187 states. [2018-10-27 08:12:13,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7187 states to 7187 states and 10421 transitions. [2018-10-27 08:12:13,050 INFO L78 Accepts]: Start accepts. Automaton has 7187 states and 10421 transitions. Word has length 127 [2018-10-27 08:12:13,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:12:13,051 INFO L481 AbstractCegarLoop]: Abstraction has 7187 states and 10421 transitions. [2018-10-27 08:12:13,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 08:12:13,051 INFO L276 IsEmpty]: Start isEmpty. Operand 7187 states and 10421 transitions. [2018-10-27 08:12:13,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-27 08:12:13,055 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:12:13,056 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, 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] [2018-10-27 08:12:13,056 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:12:13,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:12:13,060 INFO L82 PathProgramCache]: Analyzing trace with hash -507052443, now seen corresponding path program 1 times [2018-10-27 08:12:13,060 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:12:13,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:12:13,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:12:13,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:12:13,062 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:12:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:12:13,535 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:12:13,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:12:13,535 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:12:13,536 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 149 with the following transitions: [2018-10-27 08:12:13,538 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [389], [391], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [691], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-10-27 08:12:13,596 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:12:13,596 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:12:14,442 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:12:14,444 INFO L272 AbstractInterpreter]: Visited 104 different actions 298 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-27 08:12:14,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:12:14,490 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:12:14,490 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:12:14,491 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 08:12:14,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:12:14,504 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:12:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:12:14,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:12:19,147 WARN L179 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 37 [2018-10-27 08:12:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:12:21,575 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:12:22,145 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:12:22,184 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 08:12:22,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 11 [2018-10-27 08:12:22,185 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:12:22,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 08:12:22,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 08:12:22,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2018-10-27 08:12:22,187 INFO L87 Difference]: Start difference. First operand 7187 states and 10421 transitions. Second operand 3 states. [2018-10-27 08:12:26,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:12:26,143 INFO L93 Difference]: Finished difference Result 17971 states and 27252 transitions. [2018-10-27 08:12:26,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 08:12:26,144 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 148 [2018-10-27 08:12:26,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:12:26,243 INFO L225 Difference]: With dead ends: 17971 [2018-10-27 08:12:26,243 INFO L226 Difference]: Without dead ends: 11099 [2018-10-27 08:12:26,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 292 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2018-10-27 08:12:26,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11099 states. [2018-10-27 08:12:26,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11099 to 11093. [2018-10-27 08:12:26,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11093 states. [2018-10-27 08:12:26,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11093 states to 11093 states and 15378 transitions. [2018-10-27 08:12:26,705 INFO L78 Accepts]: Start accepts. Automaton has 11093 states and 15378 transitions. Word has length 148 [2018-10-27 08:12:26,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:12:26,706 INFO L481 AbstractCegarLoop]: Abstraction has 11093 states and 15378 transitions. [2018-10-27 08:12:26,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 08:12:26,706 INFO L276 IsEmpty]: Start isEmpty. Operand 11093 states and 15378 transitions. [2018-10-27 08:12:26,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-10-27 08:12:26,715 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:12:26,715 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, 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] [2018-10-27 08:12:26,716 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:12:26,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:12:26,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1797896167, now seen corresponding path program 1 times [2018-10-27 08:12:26,717 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:12:26,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:12:26,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:12:26,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:12:26,718 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:12:26,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:12:27,280 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-10-27 08:12:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:12:27,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:12:27,643 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:12:27,643 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 221 with the following transitions: [2018-10-27 08:12:27,644 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [389], [391], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1056], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-10-27 08:12:27,659 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:12:27,659 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:12:27,944 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 08:12:27,945 INFO L272 AbstractInterpreter]: Visited 172 different actions 172 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-10-27 08:12:27,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:12:27,983 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 08:12:28,477 INFO L227 lantSequenceWeakener]: Weakened 214 states. On average, predicates are now at 77.99% of their original sizes. [2018-10-27 08:12:28,477 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 08:12:28,730 INFO L415 sIntCurrentIteration]: We unified 219 AI predicates to 219 [2018-10-27 08:12:28,730 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 08:12:28,731 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 08:12:28,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2018-10-27 08:12:28,731 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:12:28,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 08:12:28,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 08:12:28,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 08:12:28,733 INFO L87 Difference]: Start difference. First operand 11093 states and 15378 transitions. Second operand 6 states. [2018-10-27 08:13:44,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:13:44,582 INFO L93 Difference]: Finished difference Result 21873 states and 30414 transitions. [2018-10-27 08:13:44,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 08:13:44,582 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 220 [2018-10-27 08:13:44,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:13:44,636 INFO L225 Difference]: With dead ends: 21873 [2018-10-27 08:13:44,636 INFO L226 Difference]: Without dead ends: 11094 [2018-10-27 08:13:44,671 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 220 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-27 08:13:44,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11094 states. [2018-10-27 08:13:44,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11094 to 11085. [2018-10-27 08:13:44,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11085 states. [2018-10-27 08:13:44,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11085 states to 11085 states and 15328 transitions. [2018-10-27 08:13:44,977 INFO L78 Accepts]: Start accepts. Automaton has 11085 states and 15328 transitions. Word has length 220 [2018-10-27 08:13:44,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:13:44,978 INFO L481 AbstractCegarLoop]: Abstraction has 11085 states and 15328 transitions. [2018-10-27 08:13:44,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 08:13:44,978 INFO L276 IsEmpty]: Start isEmpty. Operand 11085 states and 15328 transitions. [2018-10-27 08:13:44,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2018-10-27 08:13:44,989 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:13:44,989 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 08:13:44,989 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:13:44,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:13:44,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1909686646, now seen corresponding path program 1 times [2018-10-27 08:13:44,990 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:13:44,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:13:44,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:13:44,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:13:44,991 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:13:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:13:45,722 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 91 proven. 89 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-27 08:13:45,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:13:45,723 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:13:45,723 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 278 with the following transitions: [2018-10-27 08:13:45,724 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [389], [391], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [691], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [872], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-10-27 08:13:45,729 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:13:45,729 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:13:46,009 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:13:46,010 INFO L272 AbstractInterpreter]: Visited 138 different actions 400 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-27 08:13:46,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:13:46,042 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:13:46,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:13:46,043 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 08:13:46,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:13:46,060 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:13:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:13:46,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:13:46,394 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-10-27 08:13:46,394 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:13:46,576 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2018-10-27 08:13:47,848 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-10-27 08:13:47,886 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 08:13:47,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2018-10-27 08:13:47,887 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:13:47,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 08:13:47,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 08:13:47,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-27 08:13:47,888 INFO L87 Difference]: Start difference. First operand 11085 states and 15328 transitions. Second operand 5 states. [2018-10-27 08:13:53,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:13:53,658 INFO L93 Difference]: Finished difference Result 24041 states and 34436 transitions. [2018-10-27 08:13:53,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 08:13:53,659 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 277 [2018-10-27 08:13:53,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:13:53,709 INFO L225 Difference]: With dead ends: 24041 [2018-10-27 08:13:53,709 INFO L226 Difference]: Without dead ends: 9243 [2018-10-27 08:13:53,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 552 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-10-27 08:13:53,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9243 states. [2018-10-27 08:13:53,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9243 to 7657. [2018-10-27 08:13:53,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7657 states. [2018-10-27 08:13:53,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7657 states to 7657 states and 9347 transitions. [2018-10-27 08:13:53,950 INFO L78 Accepts]: Start accepts. Automaton has 7657 states and 9347 transitions. Word has length 277 [2018-10-27 08:13:53,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:13:53,950 INFO L481 AbstractCegarLoop]: Abstraction has 7657 states and 9347 transitions. [2018-10-27 08:13:53,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 08:13:53,951 INFO L276 IsEmpty]: Start isEmpty. Operand 7657 states and 9347 transitions. [2018-10-27 08:13:53,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-10-27 08:13:53,955 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:13:53,955 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:13:53,956 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:13:53,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:13:53,956 INFO L82 PathProgramCache]: Analyzing trace with hash -2141796424, now seen corresponding path program 1 times [2018-10-27 08:13:53,956 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:13:53,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:13:53,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:13:53,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:13:53,958 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:13:54,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:13:54,589 WARN L179 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2018-10-27 08:13:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:13:54,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:13:54,746 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:13:54,746 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 291 with the following transitions: [2018-10-27 08:13:54,746 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [389], [391], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1378], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-10-27 08:13:54,752 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:13:54,753 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:13:55,126 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:13:55,127 INFO L272 AbstractInterpreter]: Visited 246 different actions 724 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-27 08:13:55,152 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:13:55,152 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:13:55,152 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:13:55,152 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 08:13:55,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:13:55,161 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:13:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:13:55,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:14:01,387 WARN L179 SmtUtils]: Spent 6.04 s on a formula simplification that was a NOOP. DAG size: 38 [2018-10-27 08:14:01,526 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:14:01,527 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:14:16,191 WARN L179 SmtUtils]: Spent 8.30 s on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2018-10-27 08:14:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:14:17,186 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 08:14:17,186 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2018-10-27 08:14:17,186 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:14:17,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 08:14:17,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 08:14:17,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=109, Unknown=2, NotChecked=0, Total=156 [2018-10-27 08:14:17,187 INFO L87 Difference]: Start difference. First operand 7657 states and 9347 transitions. Second operand 6 states. [2018-10-27 08:14:19,399 WARN L832 $PredicateComparison]: unable to prove that (and (or (forall ((v_~a0~0_BEFORE_CALL_10 Int)) (or (exists ((v_prenex_12 Int)) (let ((.cse0 (* 9 v_prenex_12))) (and (<= v_prenex_12 v_~a0~0_BEFORE_CALL_10) (= 0 (mod .cse0 10)) (<= 588645 (div .cse0 10))))) (< v_~a0~0_BEFORE_CALL_10 |c_old(~a0~0)|))) (< (div (* 9 c_~a0~0) 10) 588645)) (forall ((v_prenex_12 Int)) (let ((.cse1 (* 9 v_prenex_12))) (or (< c_~a0~0 v_prenex_12) (not (= 0 (mod .cse1 10))) (< (div .cse1 10) 588645))))) is different from false Received shutdown request... [2018-10-27 08:15:18,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 08:15:18,412 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-27 08:15:18,416 WARN L205 ceAbstractionStarter]: Timeout [2018-10-27 08:15:18,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 08:15:18 BoogieIcfgContainer [2018-10-27 08:15:18,416 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 08:15:18,417 INFO L168 Benchmark]: Toolchain (without parser) took 241836.27 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.7 GB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -340.1 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-10-27 08:15:18,418 INFO L168 Benchmark]: CDTParser took 0.19 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. [2018-10-27 08:15:18,419 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1382.33 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: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. [2018-10-27 08:15:18,419 INFO L168 Benchmark]: Boogie Procedure Inliner took 388.62 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 773.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -892.0 MB). Peak memory consumption was 33.4 MB. Max. memory is 7.1 GB. [2018-10-27 08:15:18,420 INFO L168 Benchmark]: Boogie Preprocessor took 199.02 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 27.1 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. [2018-10-27 08:15:18,421 INFO L168 Benchmark]: RCFGBuilder took 6379.08 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: 306.7 MB). Peak memory consumption was 306.7 MB. Max. memory is 7.1 GB. [2018-10-27 08:15:18,422 INFO L168 Benchmark]: TraceAbstraction took 233481.60 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 1.9 GB in the beginning and 1.8 GB in the end (delta: 112.5 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-10-27 08:15:18,427 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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 1382.33 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: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 388.62 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 773.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -892.0 MB). Peak memory consumption was 33.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 199.02 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 27.1 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 6379.08 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: 306.7 MB). Peak memory consumption was 306.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 233481.60 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 1.9 GB in the beginning and 1.8 GB in the end (delta: 112.5 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 142]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 142). Cancelled while BasicCegarLoop was constructing difference of abstraction (7657states) and FLOYD_HOARE automaton (currently 5 states, 6 states before enhancement),while ReachableStatesComputation was computing reachable states (141 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 438 locations, 1 error locations. TIMEOUT Result, 233.3s OverallTime, 8 OverallIterations, 3 TraceHistogramMax, 192.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1967 SDtfs, 7483 SDslu, 1597 SDs, 0 SdLazy, 14891 SolverSat, 3253 SolverUnsat, 29 SolverUnknown, 0 SolverNotchecked, 162.3s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 1711 GetRequests, 1646 SyntacticMatches, 9 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 33.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11093occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 2.0s AbstIntTime, 4 AbstIntIterations, 1 AbstIntStrong, 0.9982792701970785 AbsIntWeakeningRatio, 0.091324200913242 AbsIntAvgWeakeningVarsNumRemoved, 16.63013698630137 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 7 MinimizatonAttempts, 2139 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 35.0s InterpolantComputationTime, 2074 NumberOfCodeBlocks, 2074 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 2775 ConstructedInterpolants, 291 QuantifiedInterpolants, 4943768 SizeOfPredicates, 7 NumberOfNonLiveVariables, 1178 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 14 InterpolantComputations, 7 PerfectInterpolantSequences, 700/1008 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown