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-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label08_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 16:26:45,670 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 16:26:45,672 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 16:26:45,685 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 16:26:45,685 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 16:26:45,687 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 16:26:45,688 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 16:26:45,690 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 16:26:45,692 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 16:26:45,693 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 16:26:45,694 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 16:26:45,694 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 16:26:45,695 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 16:26:45,697 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 16:26:45,698 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 16:26:45,698 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 16:26:45,699 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 16:26:45,702 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 16:26:45,704 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 16:26:45,706 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 16:26:45,707 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 16:26:45,708 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 16:26:45,711 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 16:26:45,711 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 16:26:45,711 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 16:26:45,713 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 16:26:45,714 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 16:26:45,715 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 16:26:45,716 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 16:26:45,717 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 16:26:45,717 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 16:26:45,718 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 16:26:45,718 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 16:26:45,719 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 16:26:45,720 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 16:26:45,721 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 16:26:45,721 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-12 16:26:45,738 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 16:26:45,739 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 16:26:45,740 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 16:26:45,740 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 16:26:45,740 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 16:26:45,740 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 16:26:45,741 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 16:26:45,741 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 16:26:45,741 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 16:26:45,741 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 16:26:45,741 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 16:26:45,742 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 16:26:45,742 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 16:26:45,743 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 16:26:45,743 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 16:26:45,743 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 16:26:45,743 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 16:26:45,744 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 16:26:45,744 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 16:26:45,744 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 16:26:45,744 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 16:26:45,744 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 16:26:45,745 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 16:26:45,745 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 16:26:45,745 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 16:26:45,745 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 16:26:45,746 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 16:26:45,746 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 16:26:45,746 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 16:26:45,746 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 16:26:45,746 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 16:26:45,746 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 16:26:45,747 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 16:26:45,747 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 16:26:45,747 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 16:26:45,800 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 16:26:45,820 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 16:26:45,825 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 16:26:45,827 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 16:26:45,827 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 16:26:45,828 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label08_false-unreach-call_false-termination.c [2018-11-12 16:26:45,905 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4524c7a48/f30df31cd8614d37a2da3cb5de976999/FLAG743dfae4b [2018-11-12 16:26:46,542 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 16:26:46,546 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label08_false-unreach-call_false-termination.c [2018-11-12 16:26:46,566 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4524c7a48/f30df31cd8614d37a2da3cb5de976999/FLAG743dfae4b [2018-11-12 16:26:46,582 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4524c7a48/f30df31cd8614d37a2da3cb5de976999 [2018-11-12 16:26:46,593 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 16:26:46,595 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 16:26:46,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 16:26:46,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 16:26:46,600 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 16:26:46,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:26:46" (1/1) ... [2018-11-12 16:26:46,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4111f80c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:26:46, skipping insertion in model container [2018-11-12 16:26:46,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:26:46" (1/1) ... [2018-11-12 16:26:46,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 16:26:46,696 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 16:26:47,197 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 16:26:47,202 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 16:26:47,374 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 16:26:47,393 INFO L193 MainTranslator]: Completed translation [2018-11-12 16:26:47,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:26:47 WrapperNode [2018-11-12 16:26:47,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 16:26:47,395 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 16:26:47,395 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 16:26:47,395 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 16:26:47,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:26:47" (1/1) ... [2018-11-12 16:26:47,548 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:26:47" (1/1) ... [2018-11-12 16:26:47,556 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 16:26:47,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 16:26:47,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 16:26:47,557 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 16:26:47,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:26:47" (1/1) ... [2018-11-12 16:26:47,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:26:47" (1/1) ... [2018-11-12 16:26:47,581 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:26:47" (1/1) ... [2018-11-12 16:26:47,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:26:47" (1/1) ... [2018-11-12 16:26:47,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:26:47" (1/1) ... [2018-11-12 16:26:47,645 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:26:47" (1/1) ... [2018-11-12 16:26:47,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:26:47" (1/1) ... [2018-11-12 16:26:47,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 16:26:47,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 16:26:47,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 16:26:47,659 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 16:26:47,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:26:47" (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 [2018-11-12 16:26:47,724 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 16:26:47,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 16:26:47,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 16:26:47,725 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 16:26:47,725 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 16:26:47,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 16:26:47,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 16:26:47,726 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 16:26:47,726 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 16:26:51,228 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 16:26:51,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:26:51 BoogieIcfgContainer [2018-11-12 16:26:51,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 16:26:51,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 16:26:51,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 16:26:51,234 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 16:26:51,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:26:46" (1/3) ... [2018-11-12 16:26:51,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b36233d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:26:51, skipping insertion in model container [2018-11-12 16:26:51,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:26:47" (2/3) ... [2018-11-12 16:26:51,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b36233d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:26:51, skipping insertion in model container [2018-11-12 16:26:51,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:26:51" (3/3) ... [2018-11-12 16:26:51,239 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label08_false-unreach-call_false-termination.c [2018-11-12 16:26:51,251 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 16:26:51,261 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 16:26:51,281 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 16:26:51,332 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 16:26:51,332 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 16:26:51,332 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 16:26:51,333 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 16:26:51,333 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 16:26:51,333 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 16:26:51,333 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 16:26:51,334 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 16:26:51,366 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-12 16:26:51,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-12 16:26:51,374 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:26:51,375 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:26:51,377 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:26:51,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:26:51,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1967865695, now seen corresponding path program 1 times [2018-11-12 16:26:51,386 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:26:51,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:26:51,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:26:51,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:26:51,431 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:26:51,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:26:51,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:26:51,846 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:26:51,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 16:26:51,846 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:26:51,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 16:26:51,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 16:26:51,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 16:26:51,872 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-11-12 16:26:53,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:26:53,869 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-11-12 16:26:53,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 16:26:53,872 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-11-12 16:26:53,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:26:53,896 INFO L225 Difference]: With dead ends: 691 [2018-11-12 16:26:53,896 INFO L226 Difference]: Without dead ends: 434 [2018-11-12 16:26:53,910 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 16:26:53,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-11-12 16:26:53,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-11-12 16:26:53,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-11-12 16:26:53,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-11-12 16:26:53,999 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 19 [2018-11-12 16:26:53,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:26:53,999 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-11-12 16:26:54,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 16:26:54,000 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-11-12 16:26:54,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-11-12 16:26:54,007 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:26:54,008 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-12 16:26:54,008 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:26:54,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:26:54,008 INFO L82 PathProgramCache]: Analyzing trace with hash 996215900, now seen corresponding path program 1 times [2018-11-12 16:26:54,009 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:26:54,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:26:54,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:26:54,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:26:54,011 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:26:54,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:26:54,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:26:54,320 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:26:54,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 16:26:54,320 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:26:54,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 16:26:54,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 16:26:54,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 16:26:54,323 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-11-12 16:26:57,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:26:57,914 INFO L93 Difference]: Finished difference Result 1588 states and 2935 transitions. [2018-11-12 16:26:57,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 16:26:57,916 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 89 [2018-11-12 16:26:57,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:26:57,927 INFO L225 Difference]: With dead ends: 1588 [2018-11-12 16:26:57,927 INFO L226 Difference]: Without dead ends: 1160 [2018-11-12 16:26:57,932 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-12 16:26:57,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2018-11-12 16:26:57,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 1153. [2018-11-12 16:26:57,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1153 states. [2018-11-12 16:26:58,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1887 transitions. [2018-11-12 16:26:58,006 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1887 transitions. Word has length 89 [2018-11-12 16:26:58,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:26:58,007 INFO L480 AbstractCegarLoop]: Abstraction has 1153 states and 1887 transitions. [2018-11-12 16:26:58,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 16:26:58,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1887 transitions. [2018-11-12 16:26:58,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-11-12 16:26:58,011 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:26:58,011 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-12 16:26:58,012 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:26:58,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:26:58,012 INFO L82 PathProgramCache]: Analyzing trace with hash 443394711, now seen corresponding path program 1 times [2018-11-12 16:26:58,012 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:26:58,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:26:58,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:26:58,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:26:58,014 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:26:58,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:26:58,260 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:26:58,260 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:26:58,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-12 16:26:58,261 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:26:58,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-12 16:26:58,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-12 16:26:58,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-12 16:26:58,262 INFO L87 Difference]: Start difference. First operand 1153 states and 1887 transitions. Second operand 5 states. [2018-11-12 16:27:00,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:27:00,803 INFO L93 Difference]: Finished difference Result 2716 states and 4601 transitions. [2018-11-12 16:27:00,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 16:27:00,804 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 90 [2018-11-12 16:27:00,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:27:00,817 INFO L225 Difference]: With dead ends: 2716 [2018-11-12 16:27:00,817 INFO L226 Difference]: Without dead ends: 1569 [2018-11-12 16:27:00,823 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-12 16:27:00,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2018-11-12 16:27:00,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1538. [2018-11-12 16:27:00,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1538 states. [2018-11-12 16:27:00,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 2356 transitions. [2018-11-12 16:27:00,884 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 2356 transitions. Word has length 90 [2018-11-12 16:27:00,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:27:00,885 INFO L480 AbstractCegarLoop]: Abstraction has 1538 states and 2356 transitions. [2018-11-12 16:27:00,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-12 16:27:00,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 2356 transitions. [2018-11-12 16:27:00,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-11-12 16:27:00,887 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:27:00,887 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-12 16:27:00,888 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:27:00,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:27:00,888 INFO L82 PathProgramCache]: Analyzing trace with hash 48842683, now seen corresponding path program 1 times [2018-11-12 16:27:00,888 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:27:00,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:27:00,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:27:00,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:27:00,890 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:27:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:27:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:27:01,168 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:27:01,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-12 16:27:01,169 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:27:01,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-12 16:27:01,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-12 16:27:01,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-12 16:27:01,170 INFO L87 Difference]: Start difference. First operand 1538 states and 2356 transitions. Second operand 5 states. [2018-11-12 16:27:03,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:27:03,607 INFO L93 Difference]: Finished difference Result 4198 states and 6461 transitions. [2018-11-12 16:27:03,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-12 16:27:03,608 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 92 [2018-11-12 16:27:03,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:27:03,625 INFO L225 Difference]: With dead ends: 4198 [2018-11-12 16:27:03,626 INFO L226 Difference]: Without dead ends: 2666 [2018-11-12 16:27:03,637 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-12 16:27:03,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2018-11-12 16:27:03,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 2560. [2018-11-12 16:27:03,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2560 states. [2018-11-12 16:27:03,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2560 states to 2560 states and 3629 transitions. [2018-11-12 16:27:03,728 INFO L78 Accepts]: Start accepts. Automaton has 2560 states and 3629 transitions. Word has length 92 [2018-11-12 16:27:03,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:27:03,728 INFO L480 AbstractCegarLoop]: Abstraction has 2560 states and 3629 transitions. [2018-11-12 16:27:03,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-12 16:27:03,728 INFO L276 IsEmpty]: Start isEmpty. Operand 2560 states and 3629 transitions. [2018-11-12 16:27:03,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-11-12 16:27:03,735 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:27:03,735 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-12 16:27:03,736 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:27:03,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:27:03,736 INFO L82 PathProgramCache]: Analyzing trace with hash 199443236, now seen corresponding path program 1 times [2018-11-12 16:27:03,736 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:27:03,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:27:03,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:27:03,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:27:03,738 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:27:03,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:27:03,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:27:03,898 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:27:03,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 16:27:03,898 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:27:03,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 16:27:03,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 16:27:03,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:27:03,899 INFO L87 Difference]: Start difference. First operand 2560 states and 3629 transitions. Second operand 4 states. [2018-11-12 16:27:06,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:27:06,101 INFO L93 Difference]: Finished difference Result 7205 states and 10610 transitions. [2018-11-12 16:27:06,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 16:27:06,101 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2018-11-12 16:27:06,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:27:06,130 INFO L225 Difference]: With dead ends: 7205 [2018-11-12 16:27:06,130 INFO L226 Difference]: Without dead ends: 4651 [2018-11-12 16:27:06,151 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:27:06,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4651 states. [2018-11-12 16:27:06,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 4651. [2018-11-12 16:27:06,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4651 states. [2018-11-12 16:27:06,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 6458 transitions. [2018-11-12 16:27:06,314 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 6458 transitions. Word has length 93 [2018-11-12 16:27:06,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:27:06,314 INFO L480 AbstractCegarLoop]: Abstraction has 4651 states and 6458 transitions. [2018-11-12 16:27:06,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 16:27:06,315 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 6458 transitions. [2018-11-12 16:27:06,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-11-12 16:27:06,330 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:27:06,330 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-12 16:27:06,330 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:27:06,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:27:06,331 INFO L82 PathProgramCache]: Analyzing trace with hash -2080310447, now seen corresponding path program 1 times [2018-11-12 16:27:06,331 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:27:06,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:27:06,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:27:06,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:27:06,333 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:27:06,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:27:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2018-11-12 16:27:06,604 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:27:06,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 16:27:06,604 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:27:06,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 16:27:06,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 16:27:06,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 16:27:06,606 INFO L87 Difference]: Start difference. First operand 4651 states and 6458 transitions. Second operand 3 states. [2018-11-12 16:27:08,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:27:08,371 INFO L93 Difference]: Finished difference Result 10803 states and 15809 transitions. [2018-11-12 16:27:08,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 16:27:08,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 237 [2018-11-12 16:27:08,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:27:08,414 INFO L225 Difference]: With dead ends: 10803 [2018-11-12 16:27:08,414 INFO L226 Difference]: Without dead ends: 6532 [2018-11-12 16:27:08,449 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 16:27:08,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6532 states. [2018-11-12 16:27:08,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6532 to 6532. [2018-11-12 16:27:08,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6532 states. [2018-11-12 16:27:08,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6532 states to 6532 states and 9111 transitions. [2018-11-12 16:27:08,627 INFO L78 Accepts]: Start accepts. Automaton has 6532 states and 9111 transitions. Word has length 237 [2018-11-12 16:27:08,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:27:08,628 INFO L480 AbstractCegarLoop]: Abstraction has 6532 states and 9111 transitions. [2018-11-12 16:27:08,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 16:27:08,629 INFO L276 IsEmpty]: Start isEmpty. Operand 6532 states and 9111 transitions. [2018-11-12 16:27:08,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-11-12 16:27:08,647 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:27:08,647 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:27:08,648 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:27:08,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:27:08,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1716679298, now seen corresponding path program 1 times [2018-11-12 16:27:08,648 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:27:08,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:27:08,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:27:08,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:27:08,650 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:27:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:27:09,206 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-11-12 16:27:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 135 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:27:10,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:27:10,049 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:27:10,050 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 263 with the following transitions: [2018-11-12 16:27:10,054 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [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], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [734], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:27:10,134 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:27:10,134 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:27:10,736 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:27:10,832 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:27:10,835 INFO L272 AbstractInterpreter]: Visited 135 different actions 135 times. Never merged. Never widened. Performed 1212 root evaluator evaluations with a maximum evaluation depth of 6. Performed 1212 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 24 variables. [2018-11-12 16:27:10,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:27:10,880 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:27:11,735 INFO L227 lantSequenceWeakener]: Weakened 253 states. On average, predicates are now at 77.28% of their original sizes. [2018-11-12 16:27:11,735 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:27:12,200 INFO L415 sIntCurrentIteration]: We unified 261 AI predicates to 261 [2018-11-12 16:27:12,200 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:27:12,202 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:27:12,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2018-11-12 16:27:12,202 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:27:12,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 16:27:12,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 16:27:12,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 16:27:12,204 INFO L87 Difference]: Start difference. First operand 6532 states and 9111 transitions. Second operand 7 states. [2018-11-12 16:27:27,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:27:27,351 INFO L93 Difference]: Finished difference Result 13243 states and 18447 transitions. [2018-11-12 16:27:27,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 16:27:27,351 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 262 [2018-11-12 16:27:27,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:27:27,383 INFO L225 Difference]: With dead ends: 13243 [2018-11-12 16:27:27,383 INFO L226 Difference]: Without dead ends: 6717 [2018-11-12 16:27:27,409 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 262 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-12 16:27:27,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6717 states. [2018-11-12 16:27:27,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6717 to 6715. [2018-11-12 16:27:27,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6715 states. [2018-11-12 16:27:27,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6715 states to 6715 states and 9302 transitions. [2018-11-12 16:27:27,597 INFO L78 Accepts]: Start accepts. Automaton has 6715 states and 9302 transitions. Word has length 262 [2018-11-12 16:27:27,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:27:27,598 INFO L480 AbstractCegarLoop]: Abstraction has 6715 states and 9302 transitions. [2018-11-12 16:27:27,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 16:27:27,598 INFO L276 IsEmpty]: Start isEmpty. Operand 6715 states and 9302 transitions. [2018-11-12 16:27:27,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2018-11-12 16:27:27,619 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:27:27,620 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:27:27,620 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:27:27,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:27:27,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1519194548, now seen corresponding path program 1 times [2018-11-12 16:27:27,621 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:27:27,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:27:27,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:27:27,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:27:27,622 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:27:27,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:27:28,164 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:27:28,834 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 124 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 16:27:28,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:27:28,834 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:27:28,834 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 348 with the following transitions: [2018-11-12 16:27:28,835 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [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], [554], [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], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [734], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:27:28,841 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:27:28,841 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:27:29,064 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:27:29,659 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:27:29,659 INFO L272 AbstractInterpreter]: Visited 139 different actions 271 times. Merged at 4 different actions 4 times. Never widened. Performed 2804 root evaluator evaluations with a maximum evaluation depth of 6. Performed 2804 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 16:27:29,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:27:29,697 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:27:30,566 INFO L227 lantSequenceWeakener]: Weakened 132 states. On average, predicates are now at 77.6% of their original sizes. [2018-11-12 16:27:30,567 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:27:32,439 INFO L415 sIntCurrentIteration]: We unified 346 AI predicates to 346 [2018-11-12 16:27:32,439 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:27:32,440 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:27:32,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [25] imperfect sequences [12] total 35 [2018-11-12 16:27:32,440 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:27:32,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-12 16:27:32,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-12 16:27:32,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2018-11-12 16:27:32,442 INFO L87 Difference]: Start difference. First operand 6715 states and 9302 transitions. Second operand 25 states. [2018-11-12 16:28:00,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:28:00,671 INFO L93 Difference]: Finished difference Result 13581 states and 18753 transitions. [2018-11-12 16:28:00,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-12 16:28:00,671 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 347 [2018-11-12 16:28:00,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:28:00,703 INFO L225 Difference]: With dead ends: 13581 [2018-11-12 16:28:00,703 INFO L226 Difference]: Without dead ends: 6720 [2018-11-12 16:28:00,734 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 361 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=283, Invalid=1277, Unknown=0, NotChecked=0, Total=1560 [2018-11-12 16:28:00,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6720 states. [2018-11-12 16:28:00,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6720 to 6715. [2018-11-12 16:28:00,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6715 states. [2018-11-12 16:28:00,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6715 states to 6715 states and 9296 transitions. [2018-11-12 16:28:00,947 INFO L78 Accepts]: Start accepts. Automaton has 6715 states and 9296 transitions. Word has length 347 [2018-11-12 16:28:00,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:28:00,948 INFO L480 AbstractCegarLoop]: Abstraction has 6715 states and 9296 transitions. [2018-11-12 16:28:00,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-12 16:28:00,948 INFO L276 IsEmpty]: Start isEmpty. Operand 6715 states and 9296 transitions. [2018-11-12 16:28:00,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2018-11-12 16:28:00,970 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:28:00,970 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:28:00,971 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:28:00,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:28:00,971 INFO L82 PathProgramCache]: Analyzing trace with hash -719461640, now seen corresponding path program 1 times [2018-11-12 16:28:00,971 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:28:00,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:28:00,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:28:00,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:28:00,973 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:28:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:28:01,518 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:28:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 49 proven. 317 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 16:28:02,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:28:02,237 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:28:02,237 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 374 with the following transitions: [2018-11-12 16:28:02,238 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [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], [658], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [734], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:28:02,243 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:28:02,243 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:28:02,311 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:28:02,474 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:28:02,475 INFO L272 AbstractInterpreter]: Visited 139 different actions 272 times. Merged at 5 different actions 5 times. Never widened. Performed 2818 root evaluator evaluations with a maximum evaluation depth of 6. Performed 2818 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 16:28:02,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:28:02,482 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:28:03,091 INFO L227 lantSequenceWeakener]: Weakened 36 states. On average, predicates are now at 78.46% of their original sizes. [2018-11-12 16:28:03,093 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:28:04,160 INFO L415 sIntCurrentIteration]: We unified 372 AI predicates to 372 [2018-11-12 16:28:04,161 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:28:04,161 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:28:04,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [15] total 33 [2018-11-12 16:28:04,162 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:28:04,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-12 16:28:04,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-12 16:28:04,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2018-11-12 16:28:04,165 INFO L87 Difference]: Start difference. First operand 6715 states and 9296 transitions. Second operand 20 states. [2018-11-12 16:28:23,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:28:23,624 INFO L93 Difference]: Finished difference Result 13246 states and 18416 transitions. [2018-11-12 16:28:23,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-12 16:28:23,625 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 373 [2018-11-12 16:28:23,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:28:23,652 INFO L225 Difference]: With dead ends: 13246 [2018-11-12 16:28:23,652 INFO L226 Difference]: Without dead ends: 6720 [2018-11-12 16:28:23,671 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 388 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=244, Invalid=1016, Unknown=0, NotChecked=0, Total=1260 [2018-11-12 16:28:23,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6720 states. [2018-11-12 16:28:23,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6720 to 6715. [2018-11-12 16:28:23,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6715 states. [2018-11-12 16:28:23,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6715 states to 6715 states and 9238 transitions. [2018-11-12 16:28:23,844 INFO L78 Accepts]: Start accepts. Automaton has 6715 states and 9238 transitions. Word has length 373 [2018-11-12 16:28:23,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:28:23,845 INFO L480 AbstractCegarLoop]: Abstraction has 6715 states and 9238 transitions. [2018-11-12 16:28:23,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-12 16:28:23,845 INFO L276 IsEmpty]: Start isEmpty. Operand 6715 states and 9238 transitions. [2018-11-12 16:28:23,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2018-11-12 16:28:23,871 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:28:23,872 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:28:23,872 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:28:23,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:28:23,873 INFO L82 PathProgramCache]: Analyzing trace with hash 704346386, now seen corresponding path program 1 times [2018-11-12 16:28:23,873 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:28:23,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:28:23,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:28:23,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:28:23,874 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:28:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:28:24,599 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 141 proven. 166 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2018-11-12 16:28:24,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:28:24,600 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:28:24,600 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 459 with the following transitions: [2018-11-12 16:28:24,600 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [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], [554], [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], [658], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [734], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:28:24,604 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:28:24,604 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:28:24,717 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:28:25,854 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:28:25,854 INFO L272 AbstractInterpreter]: Visited 140 different actions 418 times. Merged at 7 different actions 20 times. Never widened. Performed 5088 root evaluator evaluations with a maximum evaluation depth of 6. Performed 5088 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:28:25,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:28:25,892 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:28:27,092 INFO L227 lantSequenceWeakener]: Weakened 172 states. On average, predicates are now at 77.52% of their original sizes. [2018-11-12 16:28:27,092 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:28:28,516 INFO L415 sIntCurrentIteration]: We unified 457 AI predicates to 457 [2018-11-12 16:28:28,517 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:28:28,517 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:28:28,517 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [23] imperfect sequences [6] total 27 [2018-11-12 16:28:28,518 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:28:28,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-12 16:28:28,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-12 16:28:28,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2018-11-12 16:28:28,519 INFO L87 Difference]: Start difference. First operand 6715 states and 9238 transitions. Second operand 23 states. [2018-11-12 16:28:49,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:28:49,497 INFO L93 Difference]: Finished difference Result 14052 states and 19198 transitions. [2018-11-12 16:28:49,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-12 16:28:49,497 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 458 [2018-11-12 16:28:49,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:28:49,522 INFO L225 Difference]: With dead ends: 14052 [2018-11-12 16:28:49,522 INFO L226 Difference]: Without dead ends: 6718 [2018-11-12 16:28:49,540 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 478 GetRequests, 413 SyntacticMatches, 23 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=369, Invalid=1523, Unknown=0, NotChecked=0, Total=1892 [2018-11-12 16:28:49,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6718 states. [2018-11-12 16:28:49,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6718 to 6713. [2018-11-12 16:28:49,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6713 states. [2018-11-12 16:28:49,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6713 states to 6713 states and 9215 transitions. [2018-11-12 16:28:49,695 INFO L78 Accepts]: Start accepts. Automaton has 6713 states and 9215 transitions. Word has length 458 [2018-11-12 16:28:49,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:28:49,695 INFO L480 AbstractCegarLoop]: Abstraction has 6713 states and 9215 transitions. [2018-11-12 16:28:49,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-12 16:28:49,696 INFO L276 IsEmpty]: Start isEmpty. Operand 6713 states and 9215 transitions. [2018-11-12 16:28:49,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2018-11-12 16:28:49,722 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:28:49,722 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:28:49,723 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:28:49,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:28:49,723 INFO L82 PathProgramCache]: Analyzing trace with hash -355158003, now seen corresponding path program 1 times [2018-11-12 16:28:49,723 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:28:49,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:28:49,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:28:49,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:28:49,724 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:28:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:28:50,825 WARN L179 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 13 [2018-11-12 16:28:51,162 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 386 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-11-12 16:28:51,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:28:51,162 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:28:51,163 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 484 with the following transitions: [2018-11-12 16:28:51,163 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [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], [654], [655], [658], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [734], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:28:51,165 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:28:51,166 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:28:51,236 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:28:51,477 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:28:51,478 INFO L272 AbstractInterpreter]: Visited 140 different actions 414 times. Merged at 7 different actions 16 times. Never widened. Performed 4444 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4444 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 3 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 16:28:51,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:28:51,487 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:28:52,382 INFO L227 lantSequenceWeakener]: Weakened 480 states. On average, predicates are now at 79.9% of their original sizes. [2018-11-12 16:28:52,382 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:28:52,467 INFO L415 sIntCurrentIteration]: We unified 482 AI predicates to 482 [2018-11-12 16:28:52,468 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:28:52,468 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:28:52,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-11-12 16:28:52,468 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:28:52,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 16:28:52,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 16:28:52,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-12 16:28:52,470 INFO L87 Difference]: Start difference. First operand 6713 states and 9215 transitions. Second operand 10 states. [2018-11-12 16:28:58,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:28:58,904 INFO L93 Difference]: Finished difference Result 14005 states and 19632 transitions. [2018-11-12 16:28:58,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 16:28:58,904 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 483 [2018-11-12 16:28:58,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:28:58,935 INFO L225 Difference]: With dead ends: 14005 [2018-11-12 16:28:58,936 INFO L226 Difference]: Without dead ends: 7853 [2018-11-12 16:28:58,954 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 490 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-12 16:28:58,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7853 states. [2018-11-12 16:28:59,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7853 to 7640. [2018-11-12 16:28:59,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7640 states. [2018-11-12 16:28:59,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7640 states to 7640 states and 10396 transitions. [2018-11-12 16:28:59,124 INFO L78 Accepts]: Start accepts. Automaton has 7640 states and 10396 transitions. Word has length 483 [2018-11-12 16:28:59,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:28:59,125 INFO L480 AbstractCegarLoop]: Abstraction has 7640 states and 10396 transitions. [2018-11-12 16:28:59,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 16:28:59,125 INFO L276 IsEmpty]: Start isEmpty. Operand 7640 states and 10396 transitions. [2018-11-12 16:28:59,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2018-11-12 16:28:59,154 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:28:59,155 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2018-11-12 16:28:59,155 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:28:59,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:28:59,156 INFO L82 PathProgramCache]: Analyzing trace with hash 656789916, now seen corresponding path program 1 times [2018-11-12 16:28:59,156 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:28:59,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:28:59,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:28:59,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:28:59,157 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:28:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:29:00,530 WARN L179 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-11-12 16:29:00,934 WARN L179 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-11-12 16:29:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 282 proven. 339 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-11-12 16:29:02,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:29:02,167 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:29:02,167 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 551 with the following transitions: [2018-11-12 16:29:02,167 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [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], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [734], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:29:02,171 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:29:02,171 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:29:02,353 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:29:03,052 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:29:03,052 INFO L272 AbstractInterpreter]: Visited 191 different actions 959 times. Merged at 9 different actions 52 times. Widened at 1 different actions 2 times. Performed 11564 root evaluator evaluations with a maximum evaluation depth of 6. Performed 11564 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 10 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:29:03,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:29:03,063 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:29:03,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:29:03,063 INFO L192 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 [2018-11-12 16:29:03,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:29:03,073 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:29:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:29:03,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:29:04,103 WARN L179 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 8 [2018-11-12 16:29:04,461 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 608 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-11-12 16:29:04,461 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:29:05,154 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-12 16:29:05,925 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 280 proven. 129 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-11-12 16:29:05,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:29:05,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 20 [2018-11-12 16:29:05,947 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:29:05,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 16:29:05,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 16:29:05,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2018-11-12 16:29:05,949 INFO L87 Difference]: Start difference. First operand 7640 states and 10396 transitions. Second operand 17 states. [2018-11-12 16:29:06,829 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2018-11-12 16:29:07,856 WARN L179 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2018-11-12 16:29:09,392 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2018-11-12 16:29:09,714 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2018-11-12 16:29:11,427 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2018-11-12 16:29:16,722 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2018-11-12 16:29:16,979 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-11-12 16:29:17,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:29:17,673 INFO L93 Difference]: Finished difference Result 18765 states and 27140 transitions. [2018-11-12 16:29:17,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-11-12 16:29:17,674 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 550 [2018-11-12 16:29:17,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:29:17,724 INFO L225 Difference]: With dead ends: 18765 [2018-11-12 16:29:17,724 INFO L226 Difference]: Without dead ends: 11686 [2018-11-12 16:29:17,757 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1198 GetRequests, 1133 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=916, Invalid=3506, Unknown=0, NotChecked=0, Total=4422 [2018-11-12 16:29:17,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11686 states. [2018-11-12 16:29:18,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11686 to 11220. [2018-11-12 16:29:18,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11220 states. [2018-11-12 16:29:18,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11220 states to 11220 states and 15069 transitions. [2018-11-12 16:29:18,039 INFO L78 Accepts]: Start accepts. Automaton has 11220 states and 15069 transitions. Word has length 550 [2018-11-12 16:29:18,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:29:18,040 INFO L480 AbstractCegarLoop]: Abstraction has 11220 states and 15069 transitions. [2018-11-12 16:29:18,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-12 16:29:18,040 INFO L276 IsEmpty]: Start isEmpty. Operand 11220 states and 15069 transitions. [2018-11-12 16:29:18,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2018-11-12 16:29:18,079 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:29:18,080 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:29:18,080 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:29:18,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:29:18,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1233386891, now seen corresponding path program 1 times [2018-11-12 16:29:18,082 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:29:18,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:18,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:29:18,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:18,086 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:29:18,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:29:19,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 379 proven. 458 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-11-12 16:29:19,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:29:19,824 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:29:19,824 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 557 with the following transitions: [2018-11-12 16:29:19,825 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [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], [506], [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], [654], [655], [658], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [734], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:29:19,827 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:29:19,827 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:29:19,901 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:29:20,548 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:29:20,549 INFO L272 AbstractInterpreter]: Visited 142 different actions 559 times. Merged at 8 different actions 27 times. Never widened. Performed 6212 root evaluator evaluations with a maximum evaluation depth of 6. Performed 6212 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 6 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 16:29:20,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:29:20,586 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:29:20,586 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:29:20,586 INFO L192 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 [2018-11-12 16:29:20,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:29:20,595 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:29:20,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:29:20,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:29:21,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 752 proven. 2 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2018-11-12 16:29:21,199 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:29:21,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 373 proven. 112 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2018-11-12 16:29:21,936 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:29:21,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2018-11-12 16:29:21,937 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:29:21,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 16:29:21,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 16:29:21,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2018-11-12 16:29:21,939 INFO L87 Difference]: Start difference. First operand 11220 states and 15069 transitions. Second operand 17 states. [2018-11-12 16:29:27,101 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2018-11-12 16:29:27,288 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2018-11-12 16:29:28,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:29:28,190 INFO L93 Difference]: Finished difference Result 21982 states and 31920 transitions. [2018-11-12 16:29:28,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-12 16:29:28,191 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 556 [2018-11-12 16:29:28,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:29:28,235 INFO L225 Difference]: With dead ends: 21982 [2018-11-12 16:29:28,235 INFO L226 Difference]: Without dead ends: 10056 [2018-11-12 16:29:28,276 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1168 GetRequests, 1122 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=500, Invalid=1662, Unknown=0, NotChecked=0, Total=2162 [2018-11-12 16:29:28,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10056 states. [2018-11-12 16:29:28,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10056 to 9834. [2018-11-12 16:29:28,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9834 states. [2018-11-12 16:29:28,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9834 states to 9834 states and 11782 transitions. [2018-11-12 16:29:28,488 INFO L78 Accepts]: Start accepts. Automaton has 9834 states and 11782 transitions. Word has length 556 [2018-11-12 16:29:28,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:29:28,489 INFO L480 AbstractCegarLoop]: Abstraction has 9834 states and 11782 transitions. [2018-11-12 16:29:28,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-12 16:29:28,489 INFO L276 IsEmpty]: Start isEmpty. Operand 9834 states and 11782 transitions. [2018-11-12 16:29:28,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 662 [2018-11-12 16:29:28,509 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:29:28,509 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2018-11-12 16:29:28,510 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:29:28,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:29:28,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1166185568, now seen corresponding path program 2 times [2018-11-12 16:29:28,510 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:29:28,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:28,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:29:28,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:28,512 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:29:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:29:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 411 proven. 129 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2018-11-12 16:29:29,249 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:29:29,249 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:29:29,249 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-12 16:29:29,249 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-12 16:29:29,249 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:29:29,249 INFO L192 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 [2018-11-12 16:29:29,258 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-12 16:29:29,258 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-12 16:29:29,382 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-12 16:29:29,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-12 16:29:29,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:29:29,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 731 proven. 6 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2018-11-12 16:29:29,738 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:29:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 731 proven. 129 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-11-12 16:29:30,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:29:30,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8] total 14 [2018-11-12 16:29:30,412 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:29:30,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 16:29:30,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 16:29:30,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-11-12 16:29:30,414 INFO L87 Difference]: Start difference. First operand 9834 states and 11782 transitions. Second operand 9 states. [2018-11-12 16:29:33,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:29:33,444 INFO L93 Difference]: Finished difference Result 26540 states and 42221 transitions. [2018-11-12 16:29:33,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-12 16:29:33,444 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 661 [2018-11-12 16:29:33,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:29:33,602 INFO L225 Difference]: With dead ends: 26540 [2018-11-12 16:29:33,602 INFO L226 Difference]: Without dead ends: 17267 [2018-11-12 16:29:33,723 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1338 GetRequests, 1318 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2018-11-12 16:29:33,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17267 states. [2018-11-12 16:29:34,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17267 to 16608. [2018-11-12 16:29:34,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16608 states. [2018-11-12 16:29:34,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16608 states to 16608 states and 20715 transitions. [2018-11-12 16:29:34,344 INFO L78 Accepts]: Start accepts. Automaton has 16608 states and 20715 transitions. Word has length 661 [2018-11-12 16:29:34,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:29:34,344 INFO L480 AbstractCegarLoop]: Abstraction has 16608 states and 20715 transitions. [2018-11-12 16:29:34,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-12 16:29:34,345 INFO L276 IsEmpty]: Start isEmpty. Operand 16608 states and 20715 transitions. [2018-11-12 16:29:34,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 669 [2018-11-12 16:29:34,361 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:29:34,362 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-12 16:29:34,362 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:29:34,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:29:34,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1979428279, now seen corresponding path program 1 times [2018-11-12 16:29:34,363 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:29:34,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:34,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-12 16:29:34,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:34,365 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:29:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:29:35,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 418 proven. 129 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-11-12 16:29:35,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:29:35,791 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:29:35,791 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 669 with the following transitions: [2018-11-12 16:29:35,791 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [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], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [734], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:29:35,794 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:29:35,794 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:29:35,954 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:29:36,632 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:29:36,632 INFO L272 AbstractInterpreter]: Visited 192 different actions 970 times. Merged at 10 different actions 58 times. Widened at 1 different actions 1 times. Performed 11983 root evaluator evaluations with a maximum evaluation depth of 6. Performed 11983 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 13 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:29:36,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:29:36,639 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:29:36,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:29:36,639 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:29:36,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:29:36,649 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:29:36,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:29:36,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:29:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 859 proven. 2 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2018-11-12 16:29:37,261 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:29:37,474 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-11-12 16:29:37,578 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-11-12 16:29:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 418 proven. 129 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-11-12 16:29:38,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:29:38,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-12 16:29:38,207 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:29:38,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 16:29:38,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 16:29:38,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-12 16:29:38,208 INFO L87 Difference]: Start difference. First operand 16608 states and 20715 transitions. Second operand 7 states. [2018-11-12 16:29:40,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:29:40,628 INFO L93 Difference]: Finished difference Result 36692 states and 51449 transitions. [2018-11-12 16:29:40,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-12 16:29:40,628 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 668 [2018-11-12 16:29:40,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:29:40,767 INFO L225 Difference]: With dead ends: 36692 [2018-11-12 16:29:40,767 INFO L226 Difference]: Without dead ends: 20645 [2018-11-12 16:29:40,889 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1352 GetRequests, 1337 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-12 16:29:40,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20645 states. [2018-11-12 16:29:41,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20645 to 20121. [2018-11-12 16:29:41,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20121 states. [2018-11-12 16:29:41,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20121 states to 20121 states and 24730 transitions. [2018-11-12 16:29:41,475 INFO L78 Accepts]: Start accepts. Automaton has 20121 states and 24730 transitions. Word has length 668 [2018-11-12 16:29:41,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:29:41,476 INFO L480 AbstractCegarLoop]: Abstraction has 20121 states and 24730 transitions. [2018-11-12 16:29:41,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 16:29:41,476 INFO L276 IsEmpty]: Start isEmpty. Operand 20121 states and 24730 transitions. [2018-11-12 16:29:41,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 714 [2018-11-12 16:29:41,489 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:29:41,489 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:29:41,489 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:29:41,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:29:41,490 INFO L82 PathProgramCache]: Analyzing trace with hash 2068627912, now seen corresponding path program 1 times [2018-11-12 16:29:41,490 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:29:41,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:41,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:29:41,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:41,491 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:29:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:29:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 417 proven. 622 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2018-11-12 16:29:43,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:29:43,339 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:29:43,339 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 714 with the following transitions: [2018-11-12 16:29:43,339 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [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], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [734], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:29:43,342 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:29:43,342 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:29:43,587 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:29:44,341 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:29:44,342 INFO L272 AbstractInterpreter]: Visited 192 different actions 956 times. Merged at 10 different actions 44 times. Never widened. Performed 13683 root evaluator evaluations with a maximum evaluation depth of 6. Performed 13683 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 13 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:29:44,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:29:44,353 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:29:44,353 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:29:44,353 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:29:44,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:29:44,362 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:29:44,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:29:44,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:29:45,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 916 proven. 2 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2018-11-12 16:29:45,228 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:29:45,423 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 17 [2018-11-12 16:29:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 463 proven. 129 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2018-11-12 16:29:46,061 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:29:46,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 19 [2018-11-12 16:29:46,061 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:29:46,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 16:29:46,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 16:29:46,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2018-11-12 16:29:46,063 INFO L87 Difference]: Start difference. First operand 20121 states and 24730 transitions. Second operand 17 states. [2018-11-12 16:29:49,423 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2018-11-12 16:29:50,644 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2018-11-12 16:29:51,714 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2018-11-12 16:29:53,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:29:53,239 INFO L93 Difference]: Finished difference Result 40414 states and 50374 transitions. [2018-11-12 16:29:53,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-12 16:29:53,239 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 713 [2018-11-12 16:29:53,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:29:53,295 INFO L225 Difference]: With dead ends: 40414 [2018-11-12 16:29:53,295 INFO L226 Difference]: Without dead ends: 20486 [2018-11-12 16:29:53,376 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1498 GetRequests, 1448 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=583, Invalid=2069, Unknown=0, NotChecked=0, Total=2652 [2018-11-12 16:29:53,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20486 states. [2018-11-12 16:29:53,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20486 to 17950. [2018-11-12 16:29:53,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17950 states. [2018-11-12 16:29:53,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17950 states to 17950 states and 21272 transitions. [2018-11-12 16:29:53,804 INFO L78 Accepts]: Start accepts. Automaton has 17950 states and 21272 transitions. Word has length 713 [2018-11-12 16:29:53,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:29:53,805 INFO L480 AbstractCegarLoop]: Abstraction has 17950 states and 21272 transitions. [2018-11-12 16:29:53,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-12 16:29:53,806 INFO L276 IsEmpty]: Start isEmpty. Operand 17950 states and 21272 transitions. [2018-11-12 16:29:53,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 829 [2018-11-12 16:29:53,818 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:29:53,819 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:29:53,819 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:29:53,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:29:53,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1657819962, now seen corresponding path program 1 times [2018-11-12 16:29:53,820 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:29:53,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:53,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:29:53,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:53,821 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:29:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:29:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 598 proven. 129 refuted. 0 times theorem prover too weak. 1113 trivial. 0 not checked. [2018-11-12 16:29:54,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:29:54,765 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:29:54,765 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 829 with the following transitions: [2018-11-12 16:29:54,765 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [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], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [734], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [854], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:29:54,768 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:29:54,768 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:29:54,921 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:29:55,947 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:29:55,947 INFO L272 AbstractInterpreter]: Visited 193 different actions 1369 times. Merged at 11 different actions 90 times. Widened at 1 different actions 4 times. Performed 16309 root evaluator evaluations with a maximum evaluation depth of 6. Performed 16309 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 24 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:29:55,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:29:55,956 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:29:55,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:29:55,956 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:29:55,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:29:55,966 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:29:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:29:56,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:29:56,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 1164 proven. 2 refuted. 0 times theorem prover too weak. 674 trivial. 0 not checked. [2018-11-12 16:29:56,757 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:29:57,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 598 proven. 129 refuted. 0 times theorem prover too weak. 1113 trivial. 0 not checked. [2018-11-12 16:29:57,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:29:57,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2018-11-12 16:29:57,244 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:29:57,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 16:29:57,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 16:29:57,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-12 16:29:57,245 INFO L87 Difference]: Start difference. First operand 17950 states and 21272 transitions. Second operand 6 states. [2018-11-12 16:29:59,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:29:59,235 INFO L93 Difference]: Finished difference Result 36362 states and 43019 transitions. [2018-11-12 16:29:59,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-12 16:29:59,235 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 828 [2018-11-12 16:29:59,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:29:59,277 INFO L225 Difference]: With dead ends: 36362 [2018-11-12 16:29:59,277 INFO L226 Difference]: Without dead ends: 18786 [2018-11-12 16:29:59,331 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1668 GetRequests, 1657 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-12 16:29:59,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18786 states. [2018-11-12 16:29:59,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18786 to 18207. [2018-11-12 16:29:59,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18207 states. [2018-11-12 16:29:59,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18207 states to 18207 states and 21005 transitions. [2018-11-12 16:29:59,685 INFO L78 Accepts]: Start accepts. Automaton has 18207 states and 21005 transitions. Word has length 828 [2018-11-12 16:29:59,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:29:59,685 INFO L480 AbstractCegarLoop]: Abstraction has 18207 states and 21005 transitions. [2018-11-12 16:29:59,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 16:29:59,686 INFO L276 IsEmpty]: Start isEmpty. Operand 18207 states and 21005 transitions. [2018-11-12 16:29:59,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 924 [2018-11-12 16:29:59,701 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:29:59,701 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 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] [2018-11-12 16:29:59,702 INFO L423 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:29:59,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:29:59,703 INFO L82 PathProgramCache]: Analyzing trace with hash 684951054, now seen corresponding path program 1 times [2018-11-12 16:29:59,703 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:29:59,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:59,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:29:59,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:59,704 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:29:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:30:00,461 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:30:00,640 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:30:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2332 backedges. 471 proven. 1176 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2018-11-12 16:30:02,673 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:30:02,673 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:30:02,673 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 924 with the following transitions: [2018-11-12 16:30:02,673 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [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], [522], [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], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [734], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:30:02,677 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:30:02,677 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:30:02,893 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:30:03,752 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:30:03,753 INFO L272 AbstractInterpreter]: Visited 194 different actions 1183 times. Merged at 11 different actions 79 times. Widened at 1 different actions 3 times. Performed 13964 root evaluator evaluations with a maximum evaluation depth of 6. Performed 13964 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 24 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-12 16:30:03,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:03,761 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:30:03,761 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:30:03,761 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:30:03,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:30:03,772 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:30:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:30:03,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:30:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2332 backedges. 1682 proven. 2 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2018-11-12 16:30:04,390 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:30:05,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2332 backedges. 472 proven. 378 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-11-12 16:30:05,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:30:05,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 20 [2018-11-12 16:30:05,315 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:30:05,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-12 16:30:05,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-12 16:30:05,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-11-12 16:30:05,317 INFO L87 Difference]: Start difference. First operand 18207 states and 21005 transitions. Second operand 18 states. [2018-11-12 16:30:14,536 WARN L179 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2018-11-12 16:30:15,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:30:15,327 INFO L93 Difference]: Finished difference Result 34884 states and 40386 transitions. [2018-11-12 16:30:15,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-11-12 16:30:15,328 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 923 [2018-11-12 16:30:15,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:30:15,355 INFO L225 Difference]: With dead ends: 34884 [2018-11-12 16:30:15,355 INFO L226 Difference]: Without dead ends: 17051 [2018-11-12 16:30:15,380 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1936 GetRequests, 1873 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=850, Invalid=3310, Unknown=0, NotChecked=0, Total=4160 [2018-11-12 16:30:15,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17051 states. [2018-11-12 16:30:15,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17051 to 16814. [2018-11-12 16:30:15,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16814 states. [2018-11-12 16:30:15,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16814 states to 16814 states and 18736 transitions. [2018-11-12 16:30:15,644 INFO L78 Accepts]: Start accepts. Automaton has 16814 states and 18736 transitions. Word has length 923 [2018-11-12 16:30:15,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:30:15,644 INFO L480 AbstractCegarLoop]: Abstraction has 16814 states and 18736 transitions. [2018-11-12 16:30:15,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-12 16:30:15,645 INFO L276 IsEmpty]: Start isEmpty. Operand 16814 states and 18736 transitions. [2018-11-12 16:30:15,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 969 [2018-11-12 16:30:15,658 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:30:15,659 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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, 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] [2018-11-12 16:30:15,659 INFO L423 AbstractCegarLoop]: === Iteration 19 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:30:15,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:15,659 INFO L82 PathProgramCache]: Analyzing trace with hash -954250275, now seen corresponding path program 1 times [2018-11-12 16:30:15,659 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:30:15,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:15,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:30:15,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:15,660 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:30:15,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-11-12 16:30:16,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2434 backedges. 1294 proven. 127 refuted. 0 times theorem prover too weak. 1013 trivial. 0 not checked. [2018-11-12 16:30:16,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:30:16,658 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:30:16,658 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 969 with the following transitions: [2018-11-12 16:30:16,659 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [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], [522], [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], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [734], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:30:16,662 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:30:16,662 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:30:16,662 WARN L572 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-11-12 16:30:16,663 WARN L158 AbstractInterpreter]: Abstract interpretation run out of time [2018-11-12 16:30:16,663 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-12 16:30:16,663 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:30:16,663 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:30:16,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:30:16,677 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:30:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:30:16,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:30:16,927 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-11-12 16:30:17,129 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:30:17,130 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 16:30:17,134 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 16:30:17,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 04:30:17 BoogieIcfgContainer [2018-11-12 16:30:17,135 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 16:30:17,143 INFO L168 Benchmark]: Toolchain (without parser) took 210542.02 ms. Allocated memory was 1.5 GB in the beginning and 4.8 GB in the end (delta: 3.2 GB). Free memory was 1.4 GB in the beginning and 2.6 GB in the end (delta: -1.2 GB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-11-12 16:30:17,146 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 16:30:17,147 INFO L168 Benchmark]: CACSL2BoogieTranslator took 798.23 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2018-11-12 16:30:17,147 INFO L168 Benchmark]: Boogie Procedure Inliner took 161.68 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 757.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -853.9 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2018-11-12 16:30:17,148 INFO L168 Benchmark]: Boogie Preprocessor took 101.55 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 16:30:17,152 INFO L168 Benchmark]: RCFGBuilder took 3570.71 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 130.8 MB). Peak memory consumption was 130.8 MB. Max. memory is 7.1 GB. [2018-11-12 16:30:17,152 INFO L168 Benchmark]: TraceAbstraction took 205904.51 ms. Allocated memory was 2.3 GB in the beginning and 4.8 GB in the end (delta: 2.5 GB). Free memory was 2.1 GB in the beginning and 2.6 GB in the end (delta: -513.9 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-11-12 16:30:17,162 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 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 798.23 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 161.68 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 757.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -853.9 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 101.55 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 3570.71 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 130.8 MB). Peak memory consumption was 130.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 205904.51 ms. Allocated memory was 2.3 GB in the beginning and 4.8 GB in the end (delta: 2.5 GB). Free memory was 2.1 GB in the beginning and 2.6 GB in the end (delta: -513.9 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 40]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 40). Cancelled while BasicCegarLoop was analyzing trace of length 969 with TraceHistMax 8,while TraceCheckSpWp was constructing forward predicates,while XnfDer was eliminating 1 quantified variables from 3 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 205.8s OverallTime, 19 OverallIterations, 8 TraceHistogramMax, 148.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2736 SDtfs, 35022 SDslu, 4533 SDs, 0 SdLazy, 46690 SolverSat, 6571 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 62.9s Time, PredicateUnifierStatistics: 10 DeclaredPredicates, 12180 GetRequests, 11723 SyntacticMatches, 34 SemanticMatches, 423 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5035 ImplicationChecksByTransitivity, 25.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20121occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 9.3s AbstIntTime, 12 AbstIntIterations, 5 AbstIntStrong, 0.9973033260838435 AbsIntWeakeningRatio, 0.08654848800834203 AbsIntAvgWeakeningVarsNumRemoved, 15.819603753910323 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 4.2s AutomataMinimizationTime, 18 MinimizatonAttempts, 5597 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 22.3s InterpolantComputationTime, 12341 NumberOfCodeBlocks, 12120 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 17208 ConstructedInterpolants, 0 QuantifiedInterpolants, 51239036 SizeOfPredicates, 24 NumberOfNonLiveVariables, 6770 ConjunctsInSsa, 74 ConjunctsInUnsatCore, 32 InterpolantComputations, 6 PerfectInterpolantSequences, 26220/31032 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown