java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label54_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 08:34:14,591 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 08:34:14,593 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 08:34:14,609 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 08:34:14,610 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 08:34:14,611 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 08:34:14,612 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 08:34:14,614 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 08:34:14,617 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 08:34:14,617 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 08:34:14,620 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 08:34:14,620 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 08:34:14,621 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 08:34:14,622 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 08:34:14,626 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 08:34:14,627 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 08:34:14,635 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 08:34:14,638 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 08:34:14,642 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 08:34:14,644 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 08:34:14,647 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 08:34:14,649 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 08:34:14,652 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 08:34:14,654 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 08:34:14,654 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 08:34:14,655 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 08:34:14,656 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 08:34:14,657 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 08:34:14,658 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 08:34:14,659 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 08:34:14,659 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 08:34:14,661 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 08:34:14,662 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 08:34:14,662 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 08:34:14,664 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 08:34:14,664 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 08:34:14,666 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-11-07 08:34:14,685 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 08:34:14,686 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 08:34:14,686 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 08:34:14,687 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 08:34:14,687 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 08:34:14,687 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 08:34:14,687 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-07 08:34:14,687 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 08:34:14,688 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 08:34:14,688 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 08:34:14,688 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 08:34:14,688 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 08:34:14,688 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 08:34:14,688 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-07 08:34:14,689 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 08:34:14,689 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 08:34:14,690 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 08:34:14,690 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 08:34:14,690 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 08:34:14,690 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 08:34:14,690 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 08:34:14,690 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 08:34:14,691 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 08:34:14,691 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 08:34:14,691 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 08:34:14,691 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 08:34:14,691 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 08:34:14,692 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 08:34:14,692 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 08:34:14,692 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 08:34:14,692 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 08:34:14,692 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 08:34:14,693 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 08:34:14,693 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 08:34:14,693 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 08:34:14,693 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 08:34:14,739 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 08:34:14,762 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 08:34:14,767 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 08:34:14,769 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 08:34:14,769 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 08:34:14,770 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label54_true-unreach-call.c [2018-11-07 08:34:14,833 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67bc4f45b/e3b9e9c14bdc4f9cb2cf7e126abc0b89/FLAG06a8acf4d [2018-11-07 08:34:15,404 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 08:34:15,407 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label54_true-unreach-call.c [2018-11-07 08:34:15,424 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67bc4f45b/e3b9e9c14bdc4f9cb2cf7e126abc0b89/FLAG06a8acf4d [2018-11-07 08:34:15,440 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67bc4f45b/e3b9e9c14bdc4f9cb2cf7e126abc0b89 [2018-11-07 08:34:15,452 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 08:34:15,455 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 08:34:15,456 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 08:34:15,457 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 08:34:15,461 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 08:34:15,462 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:34:15" (1/1) ... [2018-11-07 08:34:15,465 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bb93b5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:15, skipping insertion in model container [2018-11-07 08:34:15,465 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:34:15" (1/1) ... [2018-11-07 08:34:15,476 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 08:34:15,545 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 08:34:16,196 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 08:34:16,201 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 08:34:16,412 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 08:34:16,431 INFO L193 MainTranslator]: Completed translation [2018-11-07 08:34:16,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:16 WrapperNode [2018-11-07 08:34:16,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 08:34:16,433 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 08:34:16,433 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 08:34:16,433 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 08:34:16,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:16" (1/1) ... [2018-11-07 08:34:16,575 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:16" (1/1) ... [2018-11-07 08:34:16,592 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 08:34:16,593 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 08:34:16,593 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 08:34:16,593 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 08:34:16,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:16" (1/1) ... [2018-11-07 08:34:16,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:16" (1/1) ... [2018-11-07 08:34:16,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:16" (1/1) ... [2018-11-07 08:34:16,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:16" (1/1) ... [2018-11-07 08:34:16,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:16" (1/1) ... [2018-11-07 08:34:16,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:16" (1/1) ... [2018-11-07 08:34:16,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:16" (1/1) ... [2018-11-07 08:34:16,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 08:34:16,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 08:34:16,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 08:34:16,720 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 08:34:16,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 08:34:16,794 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 08:34:16,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 08:34:16,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 08:34:16,794 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 08:34:16,795 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 08:34:16,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 08:34:16,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 08:34:16,795 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 08:34:16,795 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 08:34:21,386 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 08:34:21,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:34:21 BoogieIcfgContainer [2018-11-07 08:34:21,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 08:34:21,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 08:34:21,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 08:34:21,395 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 08:34:21,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:34:15" (1/3) ... [2018-11-07 08:34:21,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc534b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:34:21, skipping insertion in model container [2018-11-07 08:34:21,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:16" (2/3) ... [2018-11-07 08:34:21,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc534b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:34:21, skipping insertion in model container [2018-11-07 08:34:21,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:34:21" (3/3) ... [2018-11-07 08:34:21,400 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label54_true-unreach-call.c [2018-11-07 08:34:21,412 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 08:34:21,423 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 08:34:21,445 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 08:34:21,491 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 08:34:21,492 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 08:34:21,492 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 08:34:21,492 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 08:34:21,492 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 08:34:21,492 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 08:34:21,493 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 08:34:21,493 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 08:34:21,523 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-11-07 08:34:21,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-07 08:34:21,532 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:34:21,533 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] [2018-11-07 08:34:21,536 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:34:21,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:34:21,543 INFO L82 PathProgramCache]: Analyzing trace with hash -639357604, now seen corresponding path program 1 times [2018-11-07 08:34:21,546 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:34:21,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:34:21,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:34:21,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:34:21,608 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:34:21,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:34:22,105 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-11-07 08:34:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:34:22,122 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 08:34:22,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 08:34:22,122 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:34:22,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 08:34:22,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 08:34:22,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 08:34:22,152 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 4 states. [2018-11-07 08:34:26,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:34:26,736 INFO L93 Difference]: Finished difference Result 998 states and 1780 transitions. [2018-11-07 08:34:26,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 08:34:26,738 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2018-11-07 08:34:26,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:34:26,764 INFO L225 Difference]: With dead ends: 998 [2018-11-07 08:34:26,764 INFO L226 Difference]: Without dead ends: 699 [2018-11-07 08:34:26,775 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 08:34:26,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2018-11-07 08:34:26,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 693. [2018-11-07 08:34:26,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2018-11-07 08:34:26,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1109 transitions. [2018-11-07 08:34:26,915 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1109 transitions. Word has length 44 [2018-11-07 08:34:26,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:34:26,916 INFO L480 AbstractCegarLoop]: Abstraction has 693 states and 1109 transitions. [2018-11-07 08:34:26,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 08:34:26,916 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1109 transitions. [2018-11-07 08:34:26,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-11-07 08:34:26,930 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:34:26,930 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:34:26,931 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:34:26,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:34:26,931 INFO L82 PathProgramCache]: Analyzing trace with hash 731087552, now seen corresponding path program 1 times [2018-11-07 08:34:26,932 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:34:26,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:34:26,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:34:26,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:34:26,934 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:34:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:34:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:34:27,569 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 08:34:27,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-07 08:34:27,569 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:34:27,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 08:34:27,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 08:34:27,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 08:34:27,573 INFO L87 Difference]: Start difference. First operand 693 states and 1109 transitions. Second operand 7 states. [2018-11-07 08:34:33,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:34:33,875 INFO L93 Difference]: Finished difference Result 2549 states and 4241 transitions. [2018-11-07 08:34:33,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-07 08:34:33,878 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 118 [2018-11-07 08:34:33,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:34:33,899 INFO L225 Difference]: With dead ends: 2549 [2018-11-07 08:34:33,900 INFO L226 Difference]: Without dead ends: 1862 [2018-11-07 08:34:33,906 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-11-07 08:34:33,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2018-11-07 08:34:33,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1435. [2018-11-07 08:34:33,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1435 states. [2018-11-07 08:34:33,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 2153 transitions. [2018-11-07 08:34:33,992 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 2153 transitions. Word has length 118 [2018-11-07 08:34:33,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:34:33,993 INFO L480 AbstractCegarLoop]: Abstraction has 1435 states and 2153 transitions. [2018-11-07 08:34:33,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 08:34:33,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 2153 transitions. [2018-11-07 08:34:34,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-11-07 08:34:34,004 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:34:34,004 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 08:34:34,004 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:34:34,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:34:34,010 INFO L82 PathProgramCache]: Analyzing trace with hash 162053839, now seen corresponding path program 1 times [2018-11-07 08:34:34,011 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:34:34,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:34:34,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:34:34,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:34:34,012 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:34:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:34:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 74 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 08:34:34,221 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:34:34,222 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:34:34,223 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 192 with the following transitions: [2018-11-07 08:34:34,225 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], [253], [255], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [506], [507], [510], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 08:34:34,291 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:34:34,292 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:34:35,278 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 08:34:35,280 INFO L272 AbstractInterpreter]: Visited 79 different actions 79 times. Never merged. Never widened. Never found a fixpoint. Largest state had 28 variables. [2018-11-07 08:34:35,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:34:35,330 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 08:34:36,249 INFO L227 lantSequenceWeakener]: Weakened 182 states. On average, predicates are now at 73.51% of their original sizes. [2018-11-07 08:34:36,250 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 08:34:36,518 INFO L415 sIntCurrentIteration]: We unified 190 AI predicates to 190 [2018-11-07 08:34:36,519 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 08:34:36,520 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 08:34:36,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2018-11-07 08:34:36,521 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:34:36,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 08:34:36,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 08:34:36,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 08:34:36,522 INFO L87 Difference]: Start difference. First operand 1435 states and 2153 transitions. Second operand 6 states. [2018-11-07 08:35:08,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:35:08,113 INFO L93 Difference]: Finished difference Result 3056 states and 4512 transitions. [2018-11-07 08:35:08,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 08:35:08,113 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 191 [2018-11-07 08:35:08,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:35:08,123 INFO L225 Difference]: With dead ends: 3056 [2018-11-07 08:35:08,126 INFO L226 Difference]: Without dead ends: 1627 [2018-11-07 08:35:08,130 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 191 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-07 08:35:08,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2018-11-07 08:35:08,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1625. [2018-11-07 08:35:08,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1625 states. [2018-11-07 08:35:08,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 2352 transitions. [2018-11-07 08:35:08,166 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 2352 transitions. Word has length 191 [2018-11-07 08:35:08,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:35:08,167 INFO L480 AbstractCegarLoop]: Abstraction has 1625 states and 2352 transitions. [2018-11-07 08:35:08,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 08:35:08,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 2352 transitions. [2018-11-07 08:35:08,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-11-07 08:35:08,170 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:35:08,170 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:35:08,171 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:35:08,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:35:08,171 INFO L82 PathProgramCache]: Analyzing trace with hash -875818686, now seen corresponding path program 1 times [2018-11-07 08:35:08,171 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:35:08,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:35:08,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:35:08,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:35:08,173 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:35:08,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:35:08,505 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-07 08:35:08,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:35:08,506 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:35:08,506 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 193 with the following transitions: [2018-11-07 08:35:08,507 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], [253], [255], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [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] [2018-11-07 08:35:08,515 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:35:08,516 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:35:08,819 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 08:35:08,819 INFO L272 AbstractInterpreter]: Visited 155 different actions 304 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-07 08:35:08,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:35:08,856 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 08:35:09,075 INFO L227 lantSequenceWeakener]: Weakened 189 states. On average, predicates are now at 75.38% of their original sizes. [2018-11-07 08:35:09,076 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 08:35:09,439 INFO L415 sIntCurrentIteration]: We unified 191 AI predicates to 191 [2018-11-07 08:35:09,439 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 08:35:09,439 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 08:35:09,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2018-11-07 08:35:09,440 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:35:09,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 08:35:09,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 08:35:09,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-11-07 08:35:09,441 INFO L87 Difference]: Start difference. First operand 1625 states and 2352 transitions. Second operand 10 states. [2018-11-07 08:37:05,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:37:05,634 INFO L93 Difference]: Finished difference Result 4216 states and 6440 transitions. [2018-11-07 08:37:05,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-07 08:37:05,635 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 192 [2018-11-07 08:37:05,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:37:05,648 INFO L225 Difference]: With dead ends: 4216 [2018-11-07 08:37:05,648 INFO L226 Difference]: Without dead ends: 2787 [2018-11-07 08:37:05,655 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 200 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2018-11-07 08:37:05,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2018-11-07 08:37:05,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 2776. [2018-11-07 08:37:05,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2776 states. [2018-11-07 08:37:05,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2776 states to 2776 states and 3704 transitions. [2018-11-07 08:37:05,719 INFO L78 Accepts]: Start accepts. Automaton has 2776 states and 3704 transitions. Word has length 192 [2018-11-07 08:37:05,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:37:05,719 INFO L480 AbstractCegarLoop]: Abstraction has 2776 states and 3704 transitions. [2018-11-07 08:37:05,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 08:37:05,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states and 3704 transitions. [2018-11-07 08:37:05,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-11-07 08:37:05,724 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:37:05,724 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 08:37:05,725 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:37:05,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:37:05,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1021024169, now seen corresponding path program 1 times [2018-11-07 08:37:05,725 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:37:05,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:37:05,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:37:05,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:37:05,727 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:37:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:37:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-11-07 08:37:06,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:37:06,061 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:37:06,062 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 236 with the following transitions: [2018-11-07 08:37:06,062 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], [253], [255], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [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], [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] [2018-11-07 08:37:06,067 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:37:06,068 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:37:06,603 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:37:06,603 INFO L272 AbstractInterpreter]: Visited 126 different actions 375 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-07 08:37:06,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:37:06,609 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:37:06,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:37:06,609 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 08:37:06,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:37:06,620 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:37:06,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:37:06,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:38:07,421 WARN L179 SmtUtils]: Spent 57.05 s on a formula simplification. DAG size of input: 500 DAG size of output: 61 [2018-11-07 08:38:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-11-07 08:38:07,666 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:38:08,045 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-11-07 08:38:08,065 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 08:38:08,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 9 [2018-11-07 08:38:08,065 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:38:08,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 08:38:08,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 08:38:08,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=50, Unknown=1, NotChecked=0, Total=72 [2018-11-07 08:38:08,067 INFO L87 Difference]: Start difference. First operand 2776 states and 3704 transitions. Second operand 3 states. [2018-11-07 08:38:10,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:38:10,752 INFO L93 Difference]: Finished difference Result 5121 states and 7514 transitions. [2018-11-07 08:38:10,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 08:38:10,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 235 [2018-11-07 08:38:10,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:38:10,772 INFO L225 Difference]: With dead ends: 5121 [2018-11-07 08:38:10,773 INFO L226 Difference]: Without dead ends: 3692 [2018-11-07 08:38:10,786 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 468 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 61.0s TimeCoverageRelationStatistics Valid=21, Invalid=50, Unknown=1, NotChecked=0, Total=72 [2018-11-07 08:38:10,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3692 states. [2018-11-07 08:38:10,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3692 to 3671. [2018-11-07 08:38:10,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3671 states. [2018-11-07 08:38:10,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 5080 transitions. [2018-11-07 08:38:10,884 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 5080 transitions. Word has length 235 [2018-11-07 08:38:10,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:38:10,885 INFO L480 AbstractCegarLoop]: Abstraction has 3671 states and 5080 transitions. [2018-11-07 08:38:10,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 08:38:10,885 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 5080 transitions. [2018-11-07 08:38:10,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-11-07 08:38:10,892 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:38:10,893 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 08:38:10,893 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:38:10,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:38:10,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1641054639, now seen corresponding path program 1 times [2018-11-07 08:38:10,894 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:38:10,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:38:10,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:38:10,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:38:10,895 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:38:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:38:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-11-07 08:38:11,339 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 08:38:11,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 08:38:11,340 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:38:11,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 08:38:11,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 08:38:11,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 08:38:11,342 INFO L87 Difference]: Start difference. First operand 3671 states and 5080 transitions. Second operand 4 states. [2018-11-07 08:38:14,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:38:14,327 INFO L93 Difference]: Finished difference Result 11208 states and 16845 transitions. [2018-11-07 08:38:14,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 08:38:14,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 263 [2018-11-07 08:38:14,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:38:14,373 INFO L225 Difference]: With dead ends: 11208 [2018-11-07 08:38:14,373 INFO L226 Difference]: Without dead ends: 7732 [2018-11-07 08:38:14,401 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 [2018-11-07 08:38:14,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7732 states. [2018-11-07 08:38:14,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7732 to 7606. [2018-11-07 08:38:14,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7606 states. [2018-11-07 08:38:14,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7606 states to 7606 states and 10707 transitions. [2018-11-07 08:38:14,597 INFO L78 Accepts]: Start accepts. Automaton has 7606 states and 10707 transitions. Word has length 263 [2018-11-07 08:38:14,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:38:14,598 INFO L480 AbstractCegarLoop]: Abstraction has 7606 states and 10707 transitions. [2018-11-07 08:38:14,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 08:38:14,598 INFO L276 IsEmpty]: Start isEmpty. Operand 7606 states and 10707 transitions. [2018-11-07 08:38:14,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2018-11-07 08:38:14,612 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:38:14,612 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:38:14,613 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:38:14,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:38:14,613 INFO L82 PathProgramCache]: Analyzing trace with hash 396379969, now seen corresponding path program 1 times [2018-11-07 08:38:14,613 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:38:14,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:38:14,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:38:14,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:38:14,615 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:38:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:38:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 9 proven. 68 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-11-07 08:38:15,196 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:38:15,196 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:38:15,196 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 272 with the following transitions: [2018-11-07 08:38:15,197 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], [253], [255], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [661], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 08:38:15,201 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:38:15,201 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:38:15,881 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:38:15,881 INFO L272 AbstractInterpreter]: Visited 126 different actions 375 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-07 08:38:15,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:38:15,918 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:38:15,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:38:15,918 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 08:38:15,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:38:15,937 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:38:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:38:16,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:38:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 9 proven. 68 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-11-07 08:38:17,701 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:38:17,921 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-11-07 08:38:17,942 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 08:38:17,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 9 [2018-11-07 08:38:17,943 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:38:17,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 08:38:17,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 08:38:17,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=49, Unknown=1, NotChecked=0, Total=72 [2018-11-07 08:38:17,944 INFO L87 Difference]: Start difference. First operand 7606 states and 10707 transitions. Second operand 3 states. [2018-11-07 08:38:19,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:38:19,821 INFO L93 Difference]: Finished difference Result 15202 states and 22516 transitions. [2018-11-07 08:38:19,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 08:38:19,822 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 271 [2018-11-07 08:38:19,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:38:19,870 INFO L225 Difference]: With dead ends: 15202 [2018-11-07 08:38:19,870 INFO L226 Difference]: Without dead ends: 9133 [2018-11-07 08:38:19,909 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 541 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=22, Invalid=49, Unknown=1, NotChecked=0, Total=72 [2018-11-07 08:38:19,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9133 states. [2018-11-07 08:38:20,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9133 to 9129. [2018-11-07 08:38:20,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9129 states. [2018-11-07 08:38:20,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9129 states to 9129 states and 12716 transitions. [2018-11-07 08:38:20,150 INFO L78 Accepts]: Start accepts. Automaton has 9129 states and 12716 transitions. Word has length 271 [2018-11-07 08:38:20,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:38:20,151 INFO L480 AbstractCegarLoop]: Abstraction has 9129 states and 12716 transitions. [2018-11-07 08:38:20,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 08:38:20,151 INFO L276 IsEmpty]: Start isEmpty. Operand 9129 states and 12716 transitions. [2018-11-07 08:38:20,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2018-11-07 08:38:20,192 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:38:20,193 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 08:38:20,193 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:38:20,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:38:20,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1994193760, now seen corresponding path program 1 times [2018-11-07 08:38:20,194 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:38:20,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:38:20,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:38:20,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:38:20,195 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:38:20,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-11-07 08:38:20,797 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 08:38:20,802 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 08:38:20,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:38:20 BoogieIcfgContainer [2018-11-07 08:38:20,803 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 08:38:20,804 INFO L168 Benchmark]: Toolchain (without parser) took 245352.13 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -698.1 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-11-07 08:38:20,806 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 08:38:20,806 INFO L168 Benchmark]: CACSL2BoogieTranslator took 975.63 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. [2018-11-07 08:38:20,807 INFO L168 Benchmark]: Boogie Procedure Inliner took 159.97 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 716.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -834.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2018-11-07 08:38:20,809 INFO L168 Benchmark]: Boogie Preprocessor took 126.61 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2018-11-07 08:38:20,811 INFO L168 Benchmark]: RCFGBuilder took 4669.28 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 176.7 MB). Peak memory consumption was 176.7 MB. Max. memory is 7.1 GB. [2018-11-07 08:38:20,814 INFO L168 Benchmark]: TraceAbstraction took 239413.36 ms. Allocated memory was 2.2 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.0 GB in the beginning and 2.1 GB in the end (delta: -106.7 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-11-07 08:38:20,822 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 975.63 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 159.97 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 716.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -834.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.61 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4669.28 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 176.7 MB). Peak memory consumption was 176.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 239413.36 ms. Allocated memory was 2.2 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.0 GB in the beginning and 2.1 GB in the end (delta: -106.7 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 117]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 117). Cancelled while BasicCegarLoop was analyzing trace of length 338 with TraceHistMax 3,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 5 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 239.3s OverallTime, 8 OverallIterations, 3 TraceHistogramMax, 166.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1726 SDtfs, 3660 SDslu, 1380 SDs, 0 SdLazy, 7976 SolverSat, 1847 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 143.6s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 1447 GetRequests, 1388 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 64.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9129occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 2.7s AbstIntTime, 4 AbstIntIterations, 2 AbstIntStrong, 0.9976912104214397 AbsIntWeakeningRatio, 0.13123359580052493 AbsIntAvgWeakeningVarsNumRemoved, 17.69291338582677 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 7 MinimizatonAttempts, 597 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 65.5s InterpolantComputationTime, 1820 NumberOfCodeBlocks, 1820 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 2315 ConstructedInterpolants, 4 QuantifiedInterpolants, 1515177 SizeOfPredicates, 6 NumberOfNonLiveVariables, 912 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 1002/1393 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown