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/Problem11_label35_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 18:39:59,626 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 18:39:59,628 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 18:39:59,645 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 18:39:59,645 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 18:39:59,647 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 18:39:59,648 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 18:39:59,651 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 18:39:59,653 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 18:39:59,655 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 18:39:59,656 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 18:39:59,658 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 18:39:59,659 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 18:39:59,662 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 18:39:59,670 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 18:39:59,671 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 18:39:59,672 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 18:39:59,676 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 18:39:59,682 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 18:39:59,684 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 18:39:59,685 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 18:39:59,688 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 18:39:59,693 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 18:39:59,694 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 18:39:59,694 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 18:39:59,695 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 18:39:59,696 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 18:39:59,697 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 18:39:59,698 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 18:39:59,699 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 18:39:59,700 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 18:39:59,700 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 18:39:59,702 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 18:39:59,703 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 18:39:59,704 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 18:39:59,704 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 18:39:59,705 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 18:39:59,729 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 18:39:59,729 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 18:39:59,730 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 18:39:59,730 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 18:39:59,730 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 18:39:59,731 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 18:39:59,731 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 18:39:59,731 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 18:39:59,731 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 18:39:59,731 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 18:39:59,731 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 18:39:59,732 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 18:39:59,732 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 18:39:59,733 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 18:39:59,733 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 18:39:59,733 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 18:39:59,733 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 18:39:59,733 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 18:39:59,734 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 18:39:59,734 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 18:39:59,734 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 18:39:59,734 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 18:39:59,734 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 18:39:59,735 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 18:39:59,735 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 18:39:59,735 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 18:39:59,735 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 18:39:59,735 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 18:39:59,736 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 18:39:59,736 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 18:39:59,736 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 18:39:59,736 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 18:39:59,736 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 18:39:59,736 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 18:39:59,737 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 18:39:59,788 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 18:39:59,800 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 18:39:59,804 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 18:39:59,806 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 18:39:59,806 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 18:39:59,807 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label35_true-unreach-call.c [2018-11-12 18:39:59,868 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/589043490/e399bf803b204086a3cdd3aec479fa35/FLAG44b384348 [2018-11-12 18:40:00,504 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 18:40:00,505 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label35_true-unreach-call.c [2018-11-12 18:40:00,524 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/589043490/e399bf803b204086a3cdd3aec479fa35/FLAG44b384348 [2018-11-12 18:40:00,543 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/589043490/e399bf803b204086a3cdd3aec479fa35 [2018-11-12 18:40:00,558 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 18:40:00,559 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 18:40:00,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 18:40:00,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 18:40:00,567 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 18:40:00,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 06:40:00" (1/1) ... [2018-11-12 18:40:00,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e73d3d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:40:00, skipping insertion in model container [2018-11-12 18:40:00,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 06:40:00" (1/1) ... [2018-11-12 18:40:00,584 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 18:40:00,677 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 18:40:01,349 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 18:40:01,354 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 18:40:01,605 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 18:40:01,632 INFO L193 MainTranslator]: Completed translation [2018-11-12 18:40:01,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:40:01 WrapperNode [2018-11-12 18:40:01,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 18:40:01,634 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 18:40:01,634 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 18:40:01,634 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 18:40:01,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:40:01" (1/1) ... [2018-11-12 18:40:01,798 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:40:01" (1/1) ... [2018-11-12 18:40:01,807 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 18:40:01,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 18:40:01,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 18:40:01,808 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 18:40:01,819 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:40:01" (1/1) ... [2018-11-12 18:40:01,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:40:01" (1/1) ... [2018-11-12 18:40:01,830 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:40:01" (1/1) ... [2018-11-12 18:40:01,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:40:01" (1/1) ... [2018-11-12 18:40:01,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:40:01" (1/1) ... [2018-11-12 18:40:01,887 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:40:01" (1/1) ... [2018-11-12 18:40:01,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:40:01" (1/1) ... [2018-11-12 18:40:01,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 18:40:01,917 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 18:40:01,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 18:40:01,918 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 18:40:01,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:40:01" (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 18:40:01,996 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 18:40:01,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 18:40:01,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 18:40:01,996 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 18:40:01,997 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 18:40:01,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 18:40:01,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 18:40:01,997 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 18:40:01,997 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 18:40:06,316 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 18:40:06,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 06:40:06 BoogieIcfgContainer [2018-11-12 18:40:06,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 18:40:06,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 18:40:06,318 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 18:40:06,322 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 18:40:06,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 06:40:00" (1/3) ... [2018-11-12 18:40:06,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fc9789b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 06:40:06, skipping insertion in model container [2018-11-12 18:40:06,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:40:01" (2/3) ... [2018-11-12 18:40:06,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fc9789b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 06:40:06, skipping insertion in model container [2018-11-12 18:40:06,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 06:40:06" (3/3) ... [2018-11-12 18:40:06,328 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label35_true-unreach-call.c [2018-11-12 18:40:06,338 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 18:40:06,347 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 18:40:06,365 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 18:40:06,406 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 18:40:06,406 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 18:40:06,406 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 18:40:06,406 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 18:40:06,406 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 18:40:06,407 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 18:40:06,407 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 18:40:06,407 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 18:40:06,441 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-11-12 18:40:06,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-12 18:40:06,453 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:40:06,455 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:40:06,457 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:40:06,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:40:06,463 INFO L82 PathProgramCache]: Analyzing trace with hash 460642553, now seen corresponding path program 1 times [2018-11-12 18:40:06,465 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:40:06,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:40:06,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:40:06,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:40:06,517 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:40:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:40:07,002 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 18:40:07,005 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:40:07,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 18:40:07,005 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:40:07,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 18:40:07,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 18:40:07,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:40:07,031 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 4 states. [2018-11-12 18:40:10,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:40:10,479 INFO L93 Difference]: Finished difference Result 998 states and 1780 transitions. [2018-11-12 18:40:10,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 18:40:10,481 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2018-11-12 18:40:10,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:40:10,504 INFO L225 Difference]: With dead ends: 998 [2018-11-12 18:40:10,504 INFO L226 Difference]: Without dead ends: 699 [2018-11-12 18:40:10,513 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:40:10,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2018-11-12 18:40:10,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 693. [2018-11-12 18:40:10,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2018-11-12 18:40:10,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1109 transitions. [2018-11-12 18:40:10,617 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1109 transitions. Word has length 65 [2018-11-12 18:40:10,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:40:10,618 INFO L480 AbstractCegarLoop]: Abstraction has 693 states and 1109 transitions. [2018-11-12 18:40:10,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 18:40:10,618 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1109 transitions. [2018-11-12 18:40:10,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-11-12 18:40:10,628 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:40:10,629 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:40:10,629 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:40:10,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:40:10,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1344478420, now seen corresponding path program 1 times [2018-11-12 18:40:10,630 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:40:10,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:40:10,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:40:10,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:40:10,632 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:40:10,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:40:10,929 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:40:10,930 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:40:10,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 18:40:10,930 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:40:10,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 18:40:10,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 18:40:10,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:40:10,933 INFO L87 Difference]: Start difference. First operand 693 states and 1109 transitions. Second operand 4 states. [2018-11-12 18:40:15,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:40:15,852 INFO L93 Difference]: Finished difference Result 2539 states and 4264 transitions. [2018-11-12 18:40:15,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 18:40:15,854 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2018-11-12 18:40:15,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:40:15,876 INFO L225 Difference]: With dead ends: 2539 [2018-11-12 18:40:15,876 INFO L226 Difference]: Without dead ends: 1852 [2018-11-12 18:40:15,883 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 18:40:15,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2018-11-12 18:40:15,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1835. [2018-11-12 18:40:15,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2018-11-12 18:40:15,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2830 transitions. [2018-11-12 18:40:15,992 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2830 transitions. Word has length 139 [2018-11-12 18:40:15,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:40:15,993 INFO L480 AbstractCegarLoop]: Abstraction has 1835 states and 2830 transitions. [2018-11-12 18:40:15,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 18:40:15,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2830 transitions. [2018-11-12 18:40:16,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-11-12 18:40:16,004 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:40:16,005 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:40:16,005 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:40:16,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:40:16,006 INFO L82 PathProgramCache]: Analyzing trace with hash -2061838657, now seen corresponding path program 1 times [2018-11-12 18:40:16,006 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:40:16,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:40:16,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:40:16,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:40:16,008 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:40:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:40:16,604 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:40:16,604 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:40:16,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 18:40:16,605 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:40:16,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 18:40:16,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 18:40:16,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-12 18:40:16,606 INFO L87 Difference]: Start difference. First operand 1835 states and 2830 transitions. Second operand 6 states. [2018-11-12 18:40:20,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:40:20,812 INFO L93 Difference]: Finished difference Result 7366 states and 13552 transitions. [2018-11-12 18:40:20,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-12 18:40:20,813 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 164 [2018-11-12 18:40:20,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:40:20,885 INFO L225 Difference]: With dead ends: 7366 [2018-11-12 18:40:20,885 INFO L226 Difference]: Without dead ends: 5537 [2018-11-12 18:40:20,948 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-12 18:40:20,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5537 states. [2018-11-12 18:40:21,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5537 to 4800. [2018-11-12 18:40:21,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4800 states. [2018-11-12 18:40:21,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4800 states to 4800 states and 7128 transitions. [2018-11-12 18:40:21,187 INFO L78 Accepts]: Start accepts. Automaton has 4800 states and 7128 transitions. Word has length 164 [2018-11-12 18:40:21,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:40:21,187 INFO L480 AbstractCegarLoop]: Abstraction has 4800 states and 7128 transitions. [2018-11-12 18:40:21,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 18:40:21,188 INFO L276 IsEmpty]: Start isEmpty. Operand 4800 states and 7128 transitions. [2018-11-12 18:40:21,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-11-12 18:40:21,206 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:40:21,206 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-12 18:40:21,206 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:40:21,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:40:21,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1896930166, now seen corresponding path program 1 times [2018-11-12 18:40:21,207 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:40:21,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:40:21,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:40:21,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:40:21,208 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:40:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:40:21,620 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-11-12 18:40:21,621 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:40:21,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 18:40:21,621 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:40:21,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 18:40:21,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 18:40:21,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:40:21,624 INFO L87 Difference]: Start difference. First operand 4800 states and 7128 transitions. Second operand 4 states. [2018-11-12 18:40:23,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:40:23,914 INFO L93 Difference]: Finished difference Result 12919 states and 22071 transitions. [2018-11-12 18:40:23,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 18:40:23,915 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 230 [2018-11-12 18:40:23,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:40:23,975 INFO L225 Difference]: With dead ends: 12919 [2018-11-12 18:40:23,976 INFO L226 Difference]: Without dead ends: 8125 [2018-11-12 18:40:24,030 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:40:24,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8125 states. [2018-11-12 18:40:24,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8125 to 7737. [2018-11-12 18:40:24,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7737 states. [2018-11-12 18:40:24,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7737 states to 7737 states and 11307 transitions. [2018-11-12 18:40:24,333 INFO L78 Accepts]: Start accepts. Automaton has 7737 states and 11307 transitions. Word has length 230 [2018-11-12 18:40:24,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:40:24,333 INFO L480 AbstractCegarLoop]: Abstraction has 7737 states and 11307 transitions. [2018-11-12 18:40:24,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 18:40:24,334 INFO L276 IsEmpty]: Start isEmpty. Operand 7737 states and 11307 transitions. [2018-11-12 18:40:24,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-11-12 18:40:24,358 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:40:24,358 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-12 18:40:24,358 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:40:24,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:40:24,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1960371396, now seen corresponding path program 1 times [2018-11-12 18:40:24,359 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:40:24,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:40:24,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:40:24,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:40:24,360 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:40:24,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:40:24,784 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 116 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 18:40:24,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:40:24,784 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:40:24,785 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 235 with the following transitions: [2018-11-12 18:40:24,787 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [421], [423], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [594], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:40:24,834 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:40:24,835 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:40:25,413 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:40:25,422 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:40:25,423 INFO L272 AbstractInterpreter]: Visited 100 different actions 100 times. Never merged. Never widened. Performed 1120 root evaluator evaluations with a maximum evaluation depth of 6. Performed 1120 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 28 variables. [2018-11-12 18:40:25,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:40:25,476 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:40:26,082 INFO L227 lantSequenceWeakener]: Weakened 225 states. On average, predicates are now at 73.75% of their original sizes. [2018-11-12 18:40:26,082 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:40:26,439 INFO L415 sIntCurrentIteration]: We unified 233 AI predicates to 233 [2018-11-12 18:40:26,439 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:40:26,444 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:40:26,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2018-11-12 18:40:26,445 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:40:26,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 18:40:26,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 18:40:26,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 18:40:26,446 INFO L87 Difference]: Start difference. First operand 7737 states and 11307 transitions. Second operand 7 states. [2018-11-12 18:40:41,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:40:41,489 INFO L93 Difference]: Finished difference Result 15660 states and 22836 transitions. [2018-11-12 18:40:41,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 18:40:41,490 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 234 [2018-11-12 18:40:41,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:40:41,544 INFO L225 Difference]: With dead ends: 15660 [2018-11-12 18:40:41,544 INFO L226 Difference]: Without dead ends: 7929 [2018-11-12 18:40:41,598 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 234 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-12 18:40:41,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7929 states. [2018-11-12 18:40:41,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7929 to 7927. [2018-11-12 18:40:41,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7927 states. [2018-11-12 18:40:41,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7927 states to 7927 states and 11507 transitions. [2018-11-12 18:40:41,912 INFO L78 Accepts]: Start accepts. Automaton has 7927 states and 11507 transitions. Word has length 234 [2018-11-12 18:40:41,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:40:41,912 INFO L480 AbstractCegarLoop]: Abstraction has 7927 states and 11507 transitions. [2018-11-12 18:40:41,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 18:40:41,912 INFO L276 IsEmpty]: Start isEmpty. Operand 7927 states and 11507 transitions. [2018-11-12 18:40:41,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2018-11-12 18:40:41,936 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:40:41,936 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:40:41,937 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:40:41,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:40:41,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1348465692, now seen corresponding path program 1 times [2018-11-12 18:40:41,938 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:40:41,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:40:41,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:40:41,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:40:41,939 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:40:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:40:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-11-12 18:40:42,236 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:40:42,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 18:40:42,236 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:40:42,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 18:40:42,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 18:40:42,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 18:40:42,238 INFO L87 Difference]: Start difference. First operand 7927 states and 11507 transitions. Second operand 3 states. [2018-11-12 18:40:45,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:40:45,080 INFO L93 Difference]: Finished difference Result 17367 states and 26251 transitions. [2018-11-12 18:40:45,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 18:40:45,080 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 289 [2018-11-12 18:40:45,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:40:45,134 INFO L225 Difference]: With dead ends: 17367 [2018-11-12 18:40:45,134 INFO L226 Difference]: Without dead ends: 9636 [2018-11-12 18:40:45,177 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 18:40:45,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9636 states. [2018-11-12 18:40:45,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9636 to 9636. [2018-11-12 18:40:45,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9636 states. [2018-11-12 18:40:45,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9636 states to 9636 states and 13950 transitions. [2018-11-12 18:40:45,479 INFO L78 Accepts]: Start accepts. Automaton has 9636 states and 13950 transitions. Word has length 289 [2018-11-12 18:40:45,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:40:45,479 INFO L480 AbstractCegarLoop]: Abstraction has 9636 states and 13950 transitions. [2018-11-12 18:40:45,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 18:40:45,480 INFO L276 IsEmpty]: Start isEmpty. Operand 9636 states and 13950 transitions. [2018-11-12 18:40:45,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-11-12 18:40:45,512 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:40:45,512 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:40:45,513 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:40:45,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:40:45,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1783736515, now seen corresponding path program 1 times [2018-11-12 18:40:45,513 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:40:45,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:40:45,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:40:45,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:40:45,515 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:40:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:40:46,162 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 215 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:40:46,163 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:40:46,163 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:40:46,163 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 301 with the following transitions: [2018-11-12 18:40:46,164 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [421], [423], [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], [618], [621], [625], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:40:46,174 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:40:46,174 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:40:46,731 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:40:47,519 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:40:47,519 INFO L272 AbstractInterpreter]: Visited 140 different actions 407 times. Merged at 5 different actions 9 times. Never widened. Performed 6208 root evaluator evaluations with a maximum evaluation depth of 6. Performed 6208 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 18:40:47,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:40:47,549 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:40:48,249 INFO L227 lantSequenceWeakener]: Weakened 295 states. On average, predicates are now at 73.67% of their original sizes. [2018-11-12 18:40:48,249 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:40:49,625 INFO L415 sIntCurrentIteration]: We unified 299 AI predicates to 299 [2018-11-12 18:40:49,625 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:40:49,626 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:40:49,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [6] total 17 [2018-11-12 18:40:49,626 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:40:49,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-12 18:40:49,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-12 18:40:49,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2018-11-12 18:40:49,629 INFO L87 Difference]: Start difference. First operand 9636 states and 13950 transitions. Second operand 13 states. [2018-11-12 18:41:14,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:41:14,105 INFO L93 Difference]: Finished difference Result 19660 states and 28535 transitions. [2018-11-12 18:41:14,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 18:41:14,106 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 300 [2018-11-12 18:41:14,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:41:14,159 INFO L225 Difference]: With dead ends: 19660 [2018-11-12 18:41:14,159 INFO L226 Difference]: Without dead ends: 10030 [2018-11-12 18:41:14,222 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 309 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2018-11-12 18:41:14,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10030 states. [2018-11-12 18:41:14,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10030 to 10024. [2018-11-12 18:41:14,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10024 states. [2018-11-12 18:41:14,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10024 states to 10024 states and 14366 transitions. [2018-11-12 18:41:14,672 INFO L78 Accepts]: Start accepts. Automaton has 10024 states and 14366 transitions. Word has length 300 [2018-11-12 18:41:14,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:41:14,673 INFO L480 AbstractCegarLoop]: Abstraction has 10024 states and 14366 transitions. [2018-11-12 18:41:14,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-12 18:41:14,673 INFO L276 IsEmpty]: Start isEmpty. Operand 10024 states and 14366 transitions. [2018-11-12 18:41:14,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-11-12 18:41:14,698 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:41:14,698 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:41:14,699 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:41:14,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:41:14,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1062228098, now seen corresponding path program 1 times [2018-11-12 18:41:14,699 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:41:14,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:41:14,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:41:14,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:41:14,702 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:41:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:41:15,146 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 18:41:15,460 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-11-12 18:41:15,777 WARN L179 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-11-12 18:41:16,017 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-11-12 18:41:16,258 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 18:41:16,728 WARN L179 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-11-12 18:41:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 2 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:41:17,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:41:17,301 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:41:17,302 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 309 with the following transitions: [2018-11-12 18:41:17,302 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [421], [423], [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], [594], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [869], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:41:17,308 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:41:17,308 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:41:17,387 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:41:17,936 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:41:17,936 INFO L272 AbstractInterpreter]: Visited 156 different actions 455 times. Merged at 5 different actions 9 times. Never widened. Performed 8658 root evaluator evaluations with a maximum evaluation depth of 6. Performed 8658 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 18:41:17,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:41:17,943 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:41:18,748 INFO L227 lantSequenceWeakener]: Weakened 94 states. On average, predicates are now at 75.35% of their original sizes. [2018-11-12 18:41:18,748 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:41:19,320 INFO L415 sIntCurrentIteration]: We unified 307 AI predicates to 307 [2018-11-12 18:41:19,320 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:41:19,320 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:41:19,321 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [15] total 34 [2018-11-12 18:41:19,321 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:41:19,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-12 18:41:19,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-12 18:41:19,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2018-11-12 18:41:19,322 INFO L87 Difference]: Start difference. First operand 10024 states and 14366 transitions. Second operand 21 states. [2018-11-12 18:41:46,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:41:46,109 INFO L93 Difference]: Finished difference Result 20628 states and 29582 transitions. [2018-11-12 18:41:46,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-12 18:41:46,110 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 308 [2018-11-12 18:41:46,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:41:46,158 INFO L225 Difference]: With dead ends: 20628 [2018-11-12 18:41:46,158 INFO L226 Difference]: Without dead ends: 11188 [2018-11-12 18:41:46,195 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 326 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=297, Invalid=1263, Unknown=0, NotChecked=0, Total=1560 [2018-11-12 18:41:46,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11188 states. [2018-11-12 18:41:46,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11188 to 11181. [2018-11-12 18:41:46,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11181 states. [2018-11-12 18:41:46,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11181 states to 11181 states and 15658 transitions. [2018-11-12 18:41:46,530 INFO L78 Accepts]: Start accepts. Automaton has 11181 states and 15658 transitions. Word has length 308 [2018-11-12 18:41:46,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:41:46,531 INFO L480 AbstractCegarLoop]: Abstraction has 11181 states and 15658 transitions. [2018-11-12 18:41:46,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-12 18:41:46,531 INFO L276 IsEmpty]: Start isEmpty. Operand 11181 states and 15658 transitions. [2018-11-12 18:41:46,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-11-12 18:41:46,580 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:41:46,580 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-11-12 18:41:46,581 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:41:46,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:41:46,581 INFO L82 PathProgramCache]: Analyzing trace with hash 2046839524, now seen corresponding path program 1 times [2018-11-12 18:41:46,581 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:41:46,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:41:46,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:41:46,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:41:46,582 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:41:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:41:47,069 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-12 18:41:47,626 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-12 18:41:48,118 WARN L179 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2018-11-12 18:41:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 183 proven. 229 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 18:41:48,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:41:48,337 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:41:48,338 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 352 with the following transitions: [2018-11-12 18:41:48,338 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [421], [423], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [594], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:41:48,342 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:41:48,342 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:41:48,452 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:41:48,601 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:41:48,601 INFO L272 AbstractInterpreter]: Visited 126 different actions 248 times. Merged at 5 different actions 7 times. Never widened. Performed 4372 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4372 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 18:41:48,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:41:48,612 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:41:49,495 INFO L227 lantSequenceWeakener]: Weakened 348 states. On average, predicates are now at 73.57% of their original sizes. [2018-11-12 18:41:49,496 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:41:49,601 INFO L415 sIntCurrentIteration]: We unified 350 AI predicates to 350 [2018-11-12 18:41:49,601 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:41:49,601 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:41:49,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 19 [2018-11-12 18:41:49,602 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:41:49,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-12 18:41:49,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-12 18:41:49,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-12 18:41:49,603 INFO L87 Difference]: Start difference. First operand 11181 states and 15658 transitions. Second operand 11 states. [2018-11-12 18:41:56,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:41:56,399 INFO L93 Difference]: Finished difference Result 20814 states and 29665 transitions. [2018-11-12 18:41:56,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-12 18:41:56,400 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 351 [2018-11-12 18:41:56,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:41:56,447 INFO L225 Difference]: With dead ends: 20814 [2018-11-12 18:41:56,447 INFO L226 Difference]: Without dead ends: 11374 [2018-11-12 18:41:56,486 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 359 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2018-11-12 18:41:56,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11374 states. [2018-11-12 18:41:56,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11374 to 11372. [2018-11-12 18:41:56,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11372 states. [2018-11-12 18:41:56,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11372 states to 11372 states and 15870 transitions. [2018-11-12 18:41:56,759 INFO L78 Accepts]: Start accepts. Automaton has 11372 states and 15870 transitions. Word has length 351 [2018-11-12 18:41:56,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:41:56,760 INFO L480 AbstractCegarLoop]: Abstraction has 11372 states and 15870 transitions. [2018-11-12 18:41:56,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-12 18:41:56,760 INFO L276 IsEmpty]: Start isEmpty. Operand 11372 states and 15870 transitions. [2018-11-12 18:41:56,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2018-11-12 18:41:56,788 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:41:56,789 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:41:56,789 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:41:56,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:41:56,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1275119952, now seen corresponding path program 1 times [2018-11-12 18:41:56,790 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:41:56,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:41:56,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:41:56,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:41:56,791 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:41:56,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:41:57,274 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-12 18:41:57,825 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-12 18:41:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 183 proven. 229 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 18:41:58,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:41:58,077 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:41:58,077 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 362 with the following transitions: [2018-11-12 18:41:58,077 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [421], [423], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [594], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:41:58,081 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:41:58,081 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:41:58,143 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:41:58,454 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:41:58,454 INFO L272 AbstractInterpreter]: Visited 136 different actions 395 times. Merged at 5 different actions 9 times. Never widened. Performed 5169 root evaluator evaluations with a maximum evaluation depth of 6. Performed 5169 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 18:41:58,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:41:58,490 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:41:58,919 INFO L227 lantSequenceWeakener]: Weakened 358 states. On average, predicates are now at 73.56% of their original sizes. [2018-11-12 18:41:58,919 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:41:59,017 INFO L415 sIntCurrentIteration]: We unified 360 AI predicates to 360 [2018-11-12 18:41:59,017 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:41:59,017 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:41:59,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 19 [2018-11-12 18:41:59,018 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:41:59,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-12 18:41:59,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-12 18:41:59,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-12 18:41:59,020 INFO L87 Difference]: Start difference. First operand 11372 states and 15870 transitions. Second operand 11 states. [2018-11-12 18:42:09,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:42:09,318 INFO L93 Difference]: Finished difference Result 22351 states and 31453 transitions. [2018-11-12 18:42:09,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 18:42:09,319 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 361 [2018-11-12 18:42:09,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:42:09,365 INFO L225 Difference]: With dead ends: 22351 [2018-11-12 18:42:09,365 INFO L226 Difference]: Without dead ends: 11953 [2018-11-12 18:42:09,403 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 370 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2018-11-12 18:42:09,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11953 states. [2018-11-12 18:42:09,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11953 to 11945. [2018-11-12 18:42:09,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11945 states. [2018-11-12 18:42:09,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11945 states to 11945 states and 16535 transitions. [2018-11-12 18:42:09,711 INFO L78 Accepts]: Start accepts. Automaton has 11945 states and 16535 transitions. Word has length 361 [2018-11-12 18:42:09,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:42:09,712 INFO L480 AbstractCegarLoop]: Abstraction has 11945 states and 16535 transitions. [2018-11-12 18:42:09,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-12 18:42:09,712 INFO L276 IsEmpty]: Start isEmpty. Operand 11945 states and 16535 transitions. [2018-11-12 18:42:09,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-11-12 18:42:09,734 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:42:09,735 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 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] [2018-11-12 18:42:09,735 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:42:09,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:42:09,736 INFO L82 PathProgramCache]: Analyzing trace with hash 183799237, now seen corresponding path program 1 times [2018-11-12 18:42:09,736 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:42:09,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:42:09,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:42:09,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:42:09,737 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:42:09,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:42:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 357 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:42:10,846 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:42:10,846 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:42:10,846 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 363 with the following transitions: [2018-11-12 18:42:10,847 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [421], [423], [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], [594], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:42:10,849 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:42:10,849 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:42:10,917 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:42:11,469 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:42:11,470 INFO L272 AbstractInterpreter]: Visited 127 different actions 624 times. Merged at 8 different actions 35 times. Never widened. Performed 8923 root evaluator evaluations with a maximum evaluation depth of 6. Performed 8923 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 8 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 18:42:11,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:42:11,479 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:42:11,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:42:11,479 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 18:42:11,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:42:11,490 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:42:11,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:42:11,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:42:12,556 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 355 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-12 18:42:12,556 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:42:12,813 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2018-11-12 18:42:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 355 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-12 18:42:13,861 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:42:13,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 20 [2018-11-12 18:42:13,862 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:42:13,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-12 18:42:13,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-12 18:42:13,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2018-11-12 18:42:13,863 INFO L87 Difference]: Start difference. First operand 11945 states and 16535 transitions. Second operand 18 states. [2018-11-12 18:42:28,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:42:28,183 INFO L93 Difference]: Finished difference Result 31804 states and 51963 transitions. [2018-11-12 18:42:28,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-11-12 18:42:28,183 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 362 [2018-11-12 18:42:28,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:42:28,287 INFO L225 Difference]: With dead ends: 31804 [2018-11-12 18:42:28,287 INFO L226 Difference]: Without dead ends: 21091 [2018-11-12 18:42:28,383 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 839 GetRequests, 766 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1568 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1097, Invalid=4305, Unknown=0, NotChecked=0, Total=5402 [2018-11-12 18:42:28,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21091 states. [2018-11-12 18:42:28,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21091 to 20564. [2018-11-12 18:42:28,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20564 states. [2018-11-12 18:42:28,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20564 states to 20564 states and 26484 transitions. [2018-11-12 18:42:28,892 INFO L78 Accepts]: Start accepts. Automaton has 20564 states and 26484 transitions. Word has length 362 [2018-11-12 18:42:28,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:42:28,892 INFO L480 AbstractCegarLoop]: Abstraction has 20564 states and 26484 transitions. [2018-11-12 18:42:28,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-12 18:42:28,893 INFO L276 IsEmpty]: Start isEmpty. Operand 20564 states and 26484 transitions. [2018-11-12 18:42:28,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2018-11-12 18:42:28,917 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:42:28,917 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 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] [2018-11-12 18:42:28,917 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:42:28,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:42:28,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1614263236, now seen corresponding path program 1 times [2018-11-12 18:42:28,918 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:42:28,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:42:28,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:42:28,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:42:28,919 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:42:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:42:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 249 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:42:30,422 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:42:30,422 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:42:30,422 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 368 with the following transitions: [2018-11-12 18:42:30,422 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [421], [423], [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], [574], [575], [579], [583], [587], [591], [594], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:42:30,425 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:42:30,425 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:42:30,479 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:42:31,224 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:42:31,224 INFO L272 AbstractInterpreter]: Visited 127 different actions 754 times. Merged at 8 different actions 51 times. Widened at 1 different actions 2 times. Performed 10608 root evaluator evaluations with a maximum evaluation depth of 6. Performed 10608 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 10 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-12 18:42:31,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:42:31,232 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:42:31,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:42:31,232 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 18:42:31,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:42:31,242 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:42:31,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:42:31,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:42:31,786 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 360 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-11-12 18:42:31,786 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:42:32,027 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2018-11-12 18:42:33,078 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 360 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-11-12 18:42:33,098 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:42:33,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 23 [2018-11-12 18:42:33,099 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:42:33,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-12 18:42:33,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-12 18:42:33,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2018-11-12 18:42:33,100 INFO L87 Difference]: Start difference. First operand 20564 states and 26484 transitions. Second operand 21 states. [2018-11-12 18:42:33,307 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2018-11-12 18:42:34,253 WARN L179 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2018-11-12 18:42:36,455 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2018-11-12 18:42:36,593 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2018-11-12 18:42:40,598 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2018-11-12 18:42:44,515 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-11-12 18:42:46,602 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2018-11-12 18:42:48,887 WARN L179 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2018-11-12 18:42:55,499 WARN L179 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 19 [2018-11-12 18:43:02,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:43:02,613 INFO L93 Difference]: Finished difference Result 51235 states and 75607 transitions. [2018-11-12 18:43:02,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-11-12 18:43:02,613 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 367 [2018-11-12 18:43:02,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:43:02,798 INFO L225 Difference]: With dead ends: 51235 [2018-11-12 18:43:02,798 INFO L226 Difference]: Without dead ends: 29582 [2018-11-12 18:43:02,954 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 820 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6987 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=2791, Invalid=16115, Unknown=0, NotChecked=0, Total=18906 [2018-11-12 18:43:02,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29582 states. [2018-11-12 18:43:03,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29582 to 27475. [2018-11-12 18:43:03,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27475 states. [2018-11-12 18:43:03,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27475 states to 27475 states and 34163 transitions. [2018-11-12 18:43:03,764 INFO L78 Accepts]: Start accepts. Automaton has 27475 states and 34163 transitions. Word has length 367 [2018-11-12 18:43:03,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:43:03,765 INFO L480 AbstractCegarLoop]: Abstraction has 27475 states and 34163 transitions. [2018-11-12 18:43:03,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-12 18:43:03,765 INFO L276 IsEmpty]: Start isEmpty. Operand 27475 states and 34163 transitions. [2018-11-12 18:43:03,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2018-11-12 18:43:03,784 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:43:03,784 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:43:03,784 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:43:03,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:43:03,785 INFO L82 PathProgramCache]: Analyzing trace with hash -2032484520, now seen corresponding path program 1 times [2018-11-12 18:43:03,785 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:43:03,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:43:03,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:43:03,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:43:03,786 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:43:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:43:04,350 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 18:43:05,143 WARN L179 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2018-11-12 18:43:05,976 WARN L179 SmtUtils]: Spent 591.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2018-11-12 18:43:06,398 WARN L179 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-11-12 18:43:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 188 proven. 278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:43:06,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:43:06,945 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:43:06,945 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 390 with the following transitions: [2018-11-12 18:43:06,946 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [421], [423], [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], [594], [595], [599], [603], [607], [611], [615], [626], [629], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:43:06,948 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:43:06,948 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:43:07,012 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:43:07,491 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:43:07,491 INFO L272 AbstractInterpreter]: Visited 137 different actions 540 times. Merged at 8 different actions 27 times. Never widened. Performed 7600 root evaluator evaluations with a maximum evaluation depth of 6. Performed 7600 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 6 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 18:43:07,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:43:07,496 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:43:07,496 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:43:07,496 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 18:43:07,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:43:07,508 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:43:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:43:07,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:43:16,002 WARN L179 SmtUtils]: Spent 6.16 s on a formula simplification. DAG size of input: 151 DAG size of output: 24 [2018-11-12 18:43:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 176 proven. 191 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-11-12 18:43:18,320 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:43:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 365 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-11-12 18:43:19,376 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:43:19,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8, 5] total 26 [2018-11-12 18:43:19,376 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:43:19,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-12 18:43:19,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-12 18:43:19,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=550, Unknown=2, NotChecked=0, Total=650 [2018-11-12 18:43:19,377 INFO L87 Difference]: Start difference. First operand 27475 states and 34163 transitions. Second operand 24 states. [2018-11-12 18:43:21,421 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 25 [2018-11-12 18:43:22,485 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-11-12 18:43:27,283 WARN L179 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 65 DAG size of output: 62 Received shutdown request... [2018-11-12 18:43:29,162 WARN L187 SmtUtils]: Removed 10 from assertion stack [2018-11-12 18:43:29,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-12 18:43:29,162 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 18:43:29,167 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 18:43:29,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 06:43:29 BoogieIcfgContainer [2018-11-12 18:43:29,168 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 18:43:29,169 INFO L168 Benchmark]: Toolchain (without parser) took 208610.59 ms. Allocated memory was 1.5 GB in the beginning and 4.5 GB in the end (delta: 3.0 GB). Free memory was 1.4 GB in the beginning and 3.9 GB in the end (delta: -2.5 GB). Peak memory consumption was 477.2 MB. Max. memory is 7.1 GB. [2018-11-12 18:43:29,170 INFO L168 Benchmark]: CDTParser took 0.31 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 18:43:29,171 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1071.82 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: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. [2018-11-12 18:43:29,171 INFO L168 Benchmark]: Boogie Procedure Inliner took 173.48 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 737.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -844.9 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2018-11-12 18:43:29,172 INFO L168 Benchmark]: Boogie Preprocessor took 109.64 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 18:43:29,173 INFO L168 Benchmark]: RCFGBuilder took 4400.09 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 188.8 MB). Peak memory consumption was 188.8 MB. Max. memory is 7.1 GB. [2018-11-12 18:43:29,174 INFO L168 Benchmark]: TraceAbstraction took 202849.64 ms. Allocated memory was 2.3 GB in the beginning and 4.5 GB in the end (delta: 2.2 GB). Free memory was 2.0 GB in the beginning and 3.9 GB in the end (delta: -1.9 GB). Peak memory consumption was 332.7 MB. Max. memory is 7.1 GB. [2018-11-12 18:43:29,178 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 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 1071.82 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: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 173.48 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 737.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -844.9 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.64 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 4400.09 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 188.8 MB). Peak memory consumption was 188.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 202849.64 ms. Allocated memory was 2.3 GB in the beginning and 4.5 GB in the end (delta: 2.2 GB). Free memory was 2.0 GB in the beginning and 3.9 GB in the end (delta: -1.9 GB). Peak memory consumption was 332.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 180]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 180). Cancelled while BasicCegarLoop was constructing difference of abstraction (27475states) and FLOYD_HOARE automaton (currently 19 states, 24 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 49. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 202.7s OverallTime, 13 OverallIterations, 4 TraceHistogramMax, 156.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3312 SDtfs, 28089 SDslu, 4511 SDs, 0 SdLazy, 37575 SolverSat, 8283 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 69.5s Time, PredicateUnifierStatistics: 10 DeclaredPredicates, 4239 GetRequests, 3869 SyntacticMatches, 6 SemanticMatches, 363 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9454 ImplicationChecksByTransitivity, 37.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27475occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 5.3s AbstIntTime, 8 AbstIntIterations, 5 AbstIntStrong, 0.9978031502724868 AbsIntWeakeningRatio, 0.1000645577792124 AbsIntAvgWeakeningVarsNumRemoved, 22.426081342801808 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 4.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 3807 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 27.2s InterpolantComputationTime, 4677 NumberOfCodeBlocks, 4677 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 5776 ConstructedInterpolants, 14 QuantifiedInterpolants, 16085002 SizeOfPredicates, 9 NumberOfNonLiveVariables, 1857 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 19 InterpolantComputations, 5 PerfectInterpolantSequences, 4530/6029 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown