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/Problem17_label39_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 09:30:00,561 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 09:30:00,563 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 09:30:00,580 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 09:30:00,581 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 09:30:00,582 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 09:30:00,583 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 09:30:00,585 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 09:30:00,587 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 09:30:00,588 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 09:30:00,589 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 09:30:00,589 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 09:30:00,590 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 09:30:00,591 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 09:30:00,592 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 09:30:00,593 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 09:30:00,594 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 09:30:00,596 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 09:30:00,598 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 09:30:00,600 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 09:30:00,601 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 09:30:00,602 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 09:30:00,605 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 09:30:00,605 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 09:30:00,605 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 09:30:00,606 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 09:30:00,608 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 09:30:00,608 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 09:30:00,609 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 09:30:00,611 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 09:30:00,611 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 09:30:00,612 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 09:30:00,612 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 09:30:00,612 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 09:30:00,613 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 09:30:00,614 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 09:30:00,615 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 09:30:00,631 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 09:30:00,631 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 09:30:00,632 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 09:30:00,632 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 09:30:00,632 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 09:30:00,633 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 09:30:00,633 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-07 09:30:00,633 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 09:30:00,633 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 09:30:00,634 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 09:30:00,634 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 09:30:00,634 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 09:30:00,634 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 09:30:00,634 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-07 09:30:00,637 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 09:30:00,638 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 09:30:00,638 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 09:30:00,638 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 09:30:00,638 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 09:30:00,639 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 09:30:00,639 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 09:30:00,639 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 09:30:00,639 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 09:30:00,639 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 09:30:00,642 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 09:30:00,642 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 09:30:00,642 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 09:30:00,643 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 09:30:00,643 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 09:30:00,643 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 09:30:00,643 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 09:30:00,643 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 09:30:00,644 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 09:30:00,644 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 09:30:00,644 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 09:30:00,644 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 09:30:00,691 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 09:30:00,704 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 09:30:00,708 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 09:30:00,710 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 09:30:00,710 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 09:30:00,711 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label39_true-unreach-call.c [2018-11-07 09:30:00,770 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8630ec8bf/fa2b0697827148699349871d984c5da1/FLAG383db51f9 [2018-11-07 09:30:01,535 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 09:30:01,536 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label39_true-unreach-call.c [2018-11-07 09:30:01,569 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8630ec8bf/fa2b0697827148699349871d984c5da1/FLAG383db51f9 [2018-11-07 09:30:01,586 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8630ec8bf/fa2b0697827148699349871d984c5da1 [2018-11-07 09:30:01,599 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 09:30:01,601 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 09:30:01,602 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 09:30:01,603 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 09:30:01,611 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 09:30:01,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 09:30:01" (1/1) ... [2018-11-07 09:30:01,615 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ee4457c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:30:01, skipping insertion in model container [2018-11-07 09:30:01,616 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 09:30:01" (1/1) ... [2018-11-07 09:30:01,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 09:30:01,745 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 09:30:02,710 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 09:30:02,716 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 09:30:03,111 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 09:30:03,138 INFO L193 MainTranslator]: Completed translation [2018-11-07 09:30:03,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:30:03 WrapperNode [2018-11-07 09:30:03,138 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 09:30:03,140 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 09:30:03,140 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 09:30:03,140 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 09:30:03,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:30:03" (1/1) ... [2018-11-07 09:30:03,444 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:30:03" (1/1) ... [2018-11-07 09:30:03,455 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 09:30:03,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 09:30:03,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 09:30:03,456 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 09:30:03,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:30:03" (1/1) ... [2018-11-07 09:30:03,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:30:03" (1/1) ... [2018-11-07 09:30:03,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:30:03" (1/1) ... [2018-11-07 09:30:03,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:30:03" (1/1) ... [2018-11-07 09:30:03,586 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:30:03" (1/1) ... [2018-11-07 09:30:03,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:30:03" (1/1) ... [2018-11-07 09:30:03,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:30:03" (1/1) ... [2018-11-07 09:30:03,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 09:30:03,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 09:30:03,699 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 09:30:03,699 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 09:30:03,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:30:03" (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 09:30:03,776 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 09:30:03,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 09:30:03,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 09:30:03,777 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 09:30:03,777 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 09:30:03,777 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 09:30:03,777 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 09:30:03,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 09:30:03,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 09:30:03,779 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 09:30:03,779 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 09:30:13,949 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 09:30:13,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 09:30:13 BoogieIcfgContainer [2018-11-07 09:30:13,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 09:30:13,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 09:30:13,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 09:30:13,955 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 09:30:13,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 09:30:01" (1/3) ... [2018-11-07 09:30:13,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da71a35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 09:30:13, skipping insertion in model container [2018-11-07 09:30:13,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:30:03" (2/3) ... [2018-11-07 09:30:13,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da71a35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 09:30:13, skipping insertion in model container [2018-11-07 09:30:13,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 09:30:13" (3/3) ... [2018-11-07 09:30:13,959 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label39_true-unreach-call.c [2018-11-07 09:30:13,969 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 09:30:13,980 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 09:30:14,003 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 09:30:14,058 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 09:30:14,058 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 09:30:14,059 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 09:30:14,059 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 09:30:14,059 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 09:30:14,059 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 09:30:14,059 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 09:30:14,059 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 09:30:14,100 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-11-07 09:30:14,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-11-07 09:30:14,111 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:30:14,114 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, 1, 1, 1, 1, 1] [2018-11-07 09:30:14,116 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:30:14,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:30:14,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1351765020, now seen corresponding path program 1 times [2018-11-07 09:30:14,128 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:30:14,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:30:14,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:30:14,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:30:14,180 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:30:14,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:30:14,729 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-11-07 09:30:14,758 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 09:30:14,761 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 09:30:14,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 09:30:14,762 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 09:30:14,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 09:30:14,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 09:30:14,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 09:30:14,788 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-11-07 09:30:23,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:30:23,030 INFO L93 Difference]: Finished difference Result 2125 states and 3954 transitions. [2018-11-07 09:30:23,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 09:30:23,031 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2018-11-07 09:30:23,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:30:23,062 INFO L225 Difference]: With dead ends: 2125 [2018-11-07 09:30:23,062 INFO L226 Difference]: Without dead ends: 1515 [2018-11-07 09:30:23,071 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 [2018-11-07 09:30:23,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2018-11-07 09:30:23,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1043. [2018-11-07 09:30:23,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1043 states. [2018-11-07 09:30:23,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1647 transitions. [2018-11-07 09:30:23,209 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1647 transitions. Word has length 70 [2018-11-07 09:30:23,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:30:23,210 INFO L480 AbstractCegarLoop]: Abstraction has 1043 states and 1647 transitions. [2018-11-07 09:30:23,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 09:30:23,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1647 transitions. [2018-11-07 09:30:23,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-11-07 09:30:23,221 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:30:23,222 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 09:30:23,222 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:30:23,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:30:23,223 INFO L82 PathProgramCache]: Analyzing trace with hash -118036814, now seen corresponding path program 1 times [2018-11-07 09:30:23,223 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:30:23,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:30:23,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:30:23,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:30:23,226 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:30:23,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:30:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 09:30:23,574 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 09:30:23,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 09:30:23,575 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 09:30:23,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 09:30:23,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 09:30:23,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 09:30:23,583 INFO L87 Difference]: Start difference. First operand 1043 states and 1647 transitions. Second operand 5 states. [2018-11-07 09:30:33,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:30:33,134 INFO L93 Difference]: Finished difference Result 3017 states and 4847 transitions. [2018-11-07 09:30:33,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 09:30:33,136 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2018-11-07 09:30:33,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:30:33,154 INFO L225 Difference]: With dead ends: 3017 [2018-11-07 09:30:33,154 INFO L226 Difference]: Without dead ends: 1980 [2018-11-07 09:30:33,158 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 09:30:33,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2018-11-07 09:30:33,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1954. [2018-11-07 09:30:33,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1954 states. [2018-11-07 09:30:33,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1954 states to 1954 states and 2892 transitions. [2018-11-07 09:30:33,231 INFO L78 Accepts]: Start accepts. Automaton has 1954 states and 2892 transitions. Word has length 142 [2018-11-07 09:30:33,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:30:33,231 INFO L480 AbstractCegarLoop]: Abstraction has 1954 states and 2892 transitions. [2018-11-07 09:30:33,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 09:30:33,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1954 states and 2892 transitions. [2018-11-07 09:30:33,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-11-07 09:30:33,237 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:30:33,237 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, 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] [2018-11-07 09:30:33,237 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:30:33,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:30:33,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1553613114, now seen corresponding path program 1 times [2018-11-07 09:30:33,238 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:30:33,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:30:33,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:30:33,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:30:33,239 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:30:33,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:30:33,527 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 09:30:33,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:30:33,527 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 09:30:33,528 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 146 with the following transitions: [2018-11-07 09:30:33,530 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1118], [1126], [1134], [1142], [1150], [1158], [1166], [1170], [1172], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 09:30:33,584 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 09:30:33,585 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 09:30:34,664 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 09:30:34,665 INFO L272 AbstractInterpreter]: Visited 83 different actions 235 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-07 09:30:34,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:30:34,712 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 09:30:34,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:30:34,713 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 09:30:34,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:30:34,729 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 09:30:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:30:34,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 09:30:38,605 WARN L179 SmtUtils]: Spent 3.21 s on a formula simplification that was a NOOP. DAG size: 42 [2018-11-07 09:30:39,631 WARN L179 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 21 [2018-11-07 09:30:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 09:30:39,900 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 09:30:40,636 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-11-07 09:30:41,373 WARN L179 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-11-07 09:30:41,732 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 09:30:41,764 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 09:30:41,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2018-11-07 09:30:41,765 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 09:30:41,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 09:30:41,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 09:30:41,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-11-07 09:30:41,766 INFO L87 Difference]: Start difference. First operand 1954 states and 2892 transitions. Second operand 6 states. [2018-11-07 09:33:13,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:33:13,997 INFO L93 Difference]: Finished difference Result 7514 states and 11545 transitions. [2018-11-07 09:33:13,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 09:33:13,997 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2018-11-07 09:33:13,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:33:14,033 INFO L225 Difference]: With dead ends: 7514 [2018-11-07 09:33:14,033 INFO L226 Difference]: Without dead ends: 5566 [2018-11-07 09:33:14,049 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 284 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-11-07 09:33:14,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5566 states. [2018-11-07 09:33:14,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5566 to 5554. [2018-11-07 09:33:14,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5554 states. [2018-11-07 09:33:14,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5554 states to 5554 states and 8253 transitions. [2018-11-07 09:33:14,211 INFO L78 Accepts]: Start accepts. Automaton has 5554 states and 8253 transitions. Word has length 145 [2018-11-07 09:33:14,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:33:14,211 INFO L480 AbstractCegarLoop]: Abstraction has 5554 states and 8253 transitions. [2018-11-07 09:33:14,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 09:33:14,212 INFO L276 IsEmpty]: Start isEmpty. Operand 5554 states and 8253 transitions. [2018-11-07 09:33:14,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-11-07 09:33:14,216 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:33:14,216 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, 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] [2018-11-07 09:33:14,216 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:33:14,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:33:14,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1899074210, now seen corresponding path program 1 times [2018-11-07 09:33:14,217 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:33:14,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:33:14,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:33:14,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:33:14,218 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:33:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:33:14,455 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 09:33:14,456 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 09:33:14,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 09:33:14,456 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 09:33:14,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 09:33:14,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 09:33:14,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 09:33:14,458 INFO L87 Difference]: Start difference. First operand 5554 states and 8253 transitions. Second operand 6 states. [2018-11-07 09:33:18,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:33:18,493 INFO L93 Difference]: Finished difference Result 13438 states and 20416 transitions. [2018-11-07 09:33:18,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 09:33:18,493 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 150 [2018-11-07 09:33:18,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:33:18,538 INFO L225 Difference]: With dead ends: 13438 [2018-11-07 09:33:18,538 INFO L226 Difference]: Without dead ends: 7890 [2018-11-07 09:33:18,564 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 09:33:18,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7890 states. [2018-11-07 09:33:18,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7890 to 7815. [2018-11-07 09:33:18,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7815 states. [2018-11-07 09:33:18,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7815 states to 7815 states and 10224 transitions. [2018-11-07 09:33:18,800 INFO L78 Accepts]: Start accepts. Automaton has 7815 states and 10224 transitions. Word has length 150 [2018-11-07 09:33:18,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:33:18,801 INFO L480 AbstractCegarLoop]: Abstraction has 7815 states and 10224 transitions. [2018-11-07 09:33:18,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 09:33:18,801 INFO L276 IsEmpty]: Start isEmpty. Operand 7815 states and 10224 transitions. [2018-11-07 09:33:18,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-11-07 09:33:18,806 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:33:18,806 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 09:33:18,807 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:33:18,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:33:18,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1230054638, now seen corresponding path program 1 times [2018-11-07 09:33:18,807 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:33:18,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:33:18,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:33:18,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:33:18,808 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:33:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:33:19,120 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 09:33:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 57 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 09:33:19,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:33:19,287 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 09:33:19,287 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 159 with the following transitions: [2018-11-07 09:33:19,287 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1118], [1126], [1134], [1142], [1150], [1158], [1166], [1170], [1172], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 09:33:19,292 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 09:33:19,292 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 09:33:19,532 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 09:33:19,533 INFO L272 AbstractInterpreter]: Visited 96 different actions 185 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-07 09:33:19,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:33:19,569 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 09:33:19,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:33:19,569 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 09:33:19,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:33:19,582 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 09:33:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:33:19,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 09:33:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 09:33:19,851 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 09:33:20,340 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 09:33:20,377 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 09:33:20,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-11-07 09:33:20,378 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 09:33:20,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 09:33:20,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 09:33:20,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 09:33:20,380 INFO L87 Difference]: Start difference. First operand 7815 states and 10224 transitions. Second operand 3 states. [2018-11-07 09:33:24,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:33:24,217 INFO L93 Difference]: Finished difference Result 15624 states and 20492 transitions. [2018-11-07 09:33:24,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 09:33:24,218 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 158 [2018-11-07 09:33:24,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:33:24,253 INFO L225 Difference]: With dead ends: 15624 [2018-11-07 09:33:24,254 INFO L226 Difference]: Without dead ends: 7815 [2018-11-07 09:33:24,298 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 315 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 09:33:24,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7815 states. [2018-11-07 09:33:24,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7815 to 7815. [2018-11-07 09:33:24,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7815 states. [2018-11-07 09:33:24,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7815 states to 7815 states and 9702 transitions. [2018-11-07 09:33:24,485 INFO L78 Accepts]: Start accepts. Automaton has 7815 states and 9702 transitions. Word has length 158 [2018-11-07 09:33:24,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:33:24,486 INFO L480 AbstractCegarLoop]: Abstraction has 7815 states and 9702 transitions. [2018-11-07 09:33:24,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 09:33:24,486 INFO L276 IsEmpty]: Start isEmpty. Operand 7815 states and 9702 transitions. [2018-11-07 09:33:24,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-11-07 09:33:24,492 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:33:24,493 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, 3, 3, 3, 3, 3, 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] [2018-11-07 09:33:24,493 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:33:24,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:33:24,494 INFO L82 PathProgramCache]: Analyzing trace with hash -2112454952, now seen corresponding path program 1 times [2018-11-07 09:33:24,494 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:33:24,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:33:24,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:33:24,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:33:24,495 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:33:24,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:33:24,778 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-07 09:33:24,778 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 09:33:24,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 09:33:24,779 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 09:33:24,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 09:33:24,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 09:33:24,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 09:33:24,780 INFO L87 Difference]: Start difference. First operand 7815 states and 9702 transitions. Second operand 3 states. [2018-11-07 09:33:29,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:33:29,314 INFO L93 Difference]: Finished difference Result 20023 states and 25393 transitions. [2018-11-07 09:33:29,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 09:33:29,315 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 234 [2018-11-07 09:33:29,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:33:29,360 INFO L225 Difference]: With dead ends: 20023 [2018-11-07 09:33:29,360 INFO L226 Difference]: Without dead ends: 12214 [2018-11-07 09:33:29,379 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 09:33:29,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12214 states. [2018-11-07 09:33:29,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12214 to 12214. [2018-11-07 09:33:29,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12214 states. [2018-11-07 09:33:29,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12214 states to 12214 states and 14645 transitions. [2018-11-07 09:33:29,608 INFO L78 Accepts]: Start accepts. Automaton has 12214 states and 14645 transitions. Word has length 234 [2018-11-07 09:33:29,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:33:29,609 INFO L480 AbstractCegarLoop]: Abstraction has 12214 states and 14645 transitions. [2018-11-07 09:33:29,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 09:33:29,609 INFO L276 IsEmpty]: Start isEmpty. Operand 12214 states and 14645 transitions. [2018-11-07 09:33:29,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-11-07 09:33:29,616 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:33:29,617 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 09:33:29,617 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:33:29,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:33:29,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1918173257, now seen corresponding path program 1 times [2018-11-07 09:33:29,618 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:33:29,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:33:29,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:33:29,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:33:29,619 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:33:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:33:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 131 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-11-07 09:33:30,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:33:30,331 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 09:33:30,331 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 248 with the following transitions: [2018-11-07 09:33:30,333 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1118], [1126], [1134], [1142], [1150], [1158], [1166], [1170], [1172], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1286], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 09:33:30,342 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 09:33:30,343 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 09:33:30,597 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 09:33:30,598 INFO L272 AbstractInterpreter]: Visited 98 different actions 195 times. Merged at 7 different actions 11 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-07 09:33:30,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:33:30,637 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 09:33:30,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:33:30,637 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 09:33:30,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:33:30,653 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 09:33:30,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:33:30,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 09:33:31,011 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2018-11-07 09:33:31,192 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 131 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-11-07 09:33:31,192 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 09:33:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 131 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 09:33:32,034 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 09:33:32,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2018-11-07 09:33:32,034 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 09:33:32,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 09:33:32,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 09:33:32,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2018-11-07 09:33:32,036 INFO L87 Difference]: Start difference. First operand 12214 states and 14645 transitions. Second operand 10 states. [2018-11-07 09:33:48,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:33:48,854 INFO L93 Difference]: Finished difference Result 50362 states and 63562 transitions. [2018-11-07 09:33:48,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 09:33:48,855 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 247 [2018-11-07 09:33:48,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:33:49,005 INFO L225 Difference]: With dead ends: 50362 [2018-11-07 09:33:49,005 INFO L226 Difference]: Without dead ends: 38154 [2018-11-07 09:33:49,047 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 487 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=173, Invalid=427, Unknown=0, NotChecked=0, Total=600 [2018-11-07 09:33:49,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38154 states. [2018-11-07 09:33:49,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38154 to 34515. [2018-11-07 09:33:49,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34515 states. [2018-11-07 09:33:49,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34515 states to 34515 states and 42053 transitions. [2018-11-07 09:33:49,863 INFO L78 Accepts]: Start accepts. Automaton has 34515 states and 42053 transitions. Word has length 247 [2018-11-07 09:33:49,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:33:49,864 INFO L480 AbstractCegarLoop]: Abstraction has 34515 states and 42053 transitions. [2018-11-07 09:33:49,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 09:33:49,864 INFO L276 IsEmpty]: Start isEmpty. Operand 34515 states and 42053 transitions. [2018-11-07 09:33:49,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-11-07 09:33:49,877 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:33:49,877 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, 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, 1, 1, 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 09:33:49,878 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:33:49,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:33:49,878 INFO L82 PathProgramCache]: Analyzing trace with hash 20136577, now seen corresponding path program 1 times [2018-11-07 09:33:49,878 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:33:49,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:33:49,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:33:49,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:33:49,879 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:33:49,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:33:50,587 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-11-07 09:33:50,933 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 126 proven. 89 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 09:33:50,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:33:50,934 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 09:33:50,934 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 275 with the following transitions: [2018-11-07 09:33:50,934 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1118], [1126], [1134], [1142], [1150], [1158], [1166], [1170], [1172], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1306], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 09:33:50,943 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 09:33:50,943 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 09:33:51,173 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 09:33:51,173 INFO L272 AbstractInterpreter]: Visited 115 different actions 115 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-11-07 09:33:51,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:33:51,211 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 09:33:51,787 INFO L227 lantSequenceWeakener]: Weakened 265 states. On average, predicates are now at 75.79% of their original sizes. [2018-11-07 09:33:51,787 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 09:33:52,031 INFO L415 sIntCurrentIteration]: We unified 273 AI predicates to 273 [2018-11-07 09:33:52,032 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 09:33:52,032 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 09:33:52,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2018-11-07 09:33:52,033 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 09:33:52,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 09:33:52,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 09:33:52,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 09:33:52,034 INFO L87 Difference]: Start difference. First operand 34515 states and 42053 transitions. Second operand 6 states. Received shutdown request... [2018-11-07 09:34:01,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 09:34:01,818 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 09:34:01,823 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 09:34:01,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 09:34:01 BoogieIcfgContainer [2018-11-07 09:34:01,823 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 09:34:01,824 INFO L168 Benchmark]: Toolchain (without parser) took 240224.84 ms. Allocated memory was 1.5 GB in the beginning and 3.0 GB in the end (delta: 1.5 GB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -773.5 MB). Peak memory consumption was 682.5 MB. Max. memory is 7.1 GB. [2018-11-07 09:34:01,825 INFO L168 Benchmark]: CDTParser took 0.18 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. [2018-11-07 09:34:01,826 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1536.60 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: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-11-07 09:34:01,828 INFO L168 Benchmark]: Boogie Procedure Inliner took 315.23 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 777.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -967.2 MB). Peak memory consumption was 42.5 MB. Max. memory is 7.1 GB. [2018-11-07 09:34:01,830 INFO L168 Benchmark]: Boogie Preprocessor took 242.93 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2018-11-07 09:34:01,830 INFO L168 Benchmark]: RCFGBuilder took 10252.61 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 463.2 MB). Peak memory consumption was 463.2 MB. Max. memory is 7.1 GB. [2018-11-07 09:34:01,831 INFO L168 Benchmark]: TraceAbstraction took 227871.59 ms. Allocated memory was 2.3 GB in the beginning and 3.0 GB in the end (delta: 678.4 MB). Free memory was 1.7 GB in the beginning and 2.2 GB in the end (delta: -421.2 MB). Peak memory consumption was 257.2 MB. Max. memory is 7.1 GB. [2018-11-07 09:34:01,837 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 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 1536.60 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: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 315.23 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 777.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -967.2 MB). Peak memory consumption was 42.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 242.93 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 10252.61 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 463.2 MB). Peak memory consumption was 463.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 227871.59 ms. Allocated memory was 2.3 GB in the beginning and 3.0 GB in the end (delta: 678.4 MB). Free memory was 1.7 GB in the beginning and 2.2 GB in the end (delta: -421.2 MB). Peak memory consumption was 257.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 197]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 197). Cancelled while BasicCegarLoop was constructing difference of abstraction (34515states) and FLOYD_HOARE automaton (currently 6 states, 6 states before enhancement),while ReachableStatesComputation was computing reachable states (1026 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 227.7s OverallTime, 8 OverallIterations, 3 TraceHistogramMax, 209.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2798 SDtfs, 12977 SDslu, 2053 SDs, 0 SdLazy, 21832 SolverSat, 5727 SolverUnsat, 66 SolverUnknown, 0 SolverNotchecked, 193.6s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 1438 GetRequests, 1366 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 8.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34515occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 2.0s AbstIntTime, 4 AbstIntIterations, 1 AbstIntStrong, 0.9981148078974167 AbsIntWeakeningRatio, 0.0989010989010989 AbsIntAvgWeakeningVarsNumRemoved, 17.53846153846154 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.8s AutomataMinimizationTime, 7 MinimizatonAttempts, 4224 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 11.8s InterpolantComputationTime, 1970 NumberOfCodeBlocks, 1970 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 2506 ConstructedInterpolants, 237 QuantifiedInterpolants, 3008090 SizeOfPredicates, 7 NumberOfNonLiveVariables, 1050 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 14 InterpolantComputations, 7 PerfectInterpolantSequences, 1264/1568 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown