java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label42_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 08:35:38,537 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 08:35:38,539 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 08:35:38,554 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 08:35:38,554 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 08:35:38,555 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 08:35:38,557 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 08:35:38,558 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 08:35:38,560 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 08:35:38,561 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 08:35:38,562 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 08:35:38,562 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 08:35:38,563 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 08:35:38,564 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 08:35:38,565 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 08:35:38,566 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 08:35:38,567 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 08:35:38,569 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 08:35:38,571 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 08:35:38,573 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 08:35:38,575 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 08:35:38,576 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 08:35:38,581 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 08:35:38,581 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 08:35:38,582 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 08:35:38,582 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 08:35:38,583 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 08:35:38,584 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 08:35:38,585 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 08:35:38,586 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 08:35:38,586 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 08:35:38,587 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 08:35:38,587 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 08:35:38,588 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 08:35:38,589 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 08:35:38,589 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 08:35:38,590 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-27 08:35:38,613 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 08:35:38,613 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 08:35:38,614 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 08:35:38,614 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 08:35:38,615 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 08:35:38,615 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 08:35:38,615 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-27 08:35:38,615 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 08:35:38,615 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 08:35:38,616 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 08:35:38,616 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 08:35:38,616 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 08:35:38,616 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 08:35:38,616 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 08:35:38,617 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 08:35:38,617 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 08:35:38,618 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 08:35:38,618 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 08:35:38,618 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 08:35:38,618 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 08:35:38,618 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 08:35:38,619 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 08:35:38,619 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 08:35:38,619 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 08:35:38,619 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 08:35:38,619 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 08:35:38,620 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 08:35:38,620 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 08:35:38,620 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 08:35:38,620 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 08:35:38,620 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 08:35:38,620 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 08:35:38,621 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 08:35:38,621 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 08:35:38,621 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 08:35:38,621 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 08:35:38,677 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 08:35:38,694 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 08:35:38,699 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 08:35:38,701 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 08:35:38,701 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 08:35:38,702 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label42_true-unreach-call.c [2018-10-27 08:35:38,756 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/379fc38c3/c4d47ec2d2a1480bb52de006d2f7ae1c/FLAG353f9085d [2018-10-27 08:35:39,465 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 08:35:39,466 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label42_true-unreach-call.c [2018-10-27 08:35:39,492 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/379fc38c3/c4d47ec2d2a1480bb52de006d2f7ae1c/FLAG353f9085d [2018-10-27 08:35:39,513 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/379fc38c3/c4d47ec2d2a1480bb52de006d2f7ae1c [2018-10-27 08:35:39,527 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 08:35:39,529 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 08:35:39,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 08:35:39,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 08:35:39,537 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 08:35:39,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:35:39" (1/1) ... [2018-10-27 08:35:39,541 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b4aab1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:39, skipping insertion in model container [2018-10-27 08:35:39,542 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:35:39" (1/1) ... [2018-10-27 08:35:39,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 08:35:39,685 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 08:35:40,696 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 08:35:40,701 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 08:35:41,046 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 08:35:41,068 INFO L193 MainTranslator]: Completed translation [2018-10-27 08:35:41,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:41 WrapperNode [2018-10-27 08:35:41,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 08:35:41,070 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 08:35:41,070 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 08:35:41,070 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 08:35:41,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:41" (1/1) ... [2018-10-27 08:35:41,131 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:41" (1/1) ... [2018-10-27 08:35:41,483 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 08:35:41,483 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 08:35:41,483 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 08:35:41,484 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 08:35:41,495 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:41" (1/1) ... [2018-10-27 08:35:41,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:41" (1/1) ... [2018-10-27 08:35:41,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:41" (1/1) ... [2018-10-27 08:35:41,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:41" (1/1) ... [2018-10-27 08:35:41,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:41" (1/1) ... [2018-10-27 08:35:41,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:41" (1/1) ... [2018-10-27 08:35:41,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:41" (1/1) ... [2018-10-27 08:35:41,737 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 08:35:41,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 08:35:41,738 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 08:35:41,738 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 08:35:41,739 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 08:35:41,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 08:35:41,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 08:35:41,808 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 08:35:41,808 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 08:35:41,808 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 08:35:41,808 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 08:35:41,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 08:35:41,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 08:35:41,809 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 08:35:41,809 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 08:35:54,031 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 08:35:54,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:35:54 BoogieIcfgContainer [2018-10-27 08:35:54,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 08:35:54,034 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 08:35:54,034 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 08:35:54,037 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 08:35:54,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:35:39" (1/3) ... [2018-10-27 08:35:54,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a4d4d7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:35:54, skipping insertion in model container [2018-10-27 08:35:54,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:41" (2/3) ... [2018-10-27 08:35:54,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a4d4d7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:35:54, skipping insertion in model container [2018-10-27 08:35:54,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:35:54" (3/3) ... [2018-10-27 08:35:54,041 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label42_true-unreach-call.c [2018-10-27 08:35:54,052 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 08:35:54,062 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 08:35:54,080 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 08:35:54,140 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 08:35:54,140 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 08:35:54,140 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 08:35:54,140 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 08:35:54,141 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 08:35:54,141 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 08:35:54,141 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 08:35:54,141 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 08:35:54,178 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-27 08:35:54,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-27 08:35:54,188 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:35:54,189 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] [2018-10-27 08:35:54,191 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:35:54,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:35:54,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1611453546, now seen corresponding path program 1 times [2018-10-27 08:35:54,201 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:35:54,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:35:54,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:35:54,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:35:54,261 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:35:54,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:35:54,735 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-27 08:35:54,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:35:54,752 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:35:54,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 08:35:54,752 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:35:54,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 08:35:54,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 08:35:54,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:35:54,780 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-10-27 08:36:04,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:36:04,760 INFO L93 Difference]: Finished difference Result 2162 states and 4007 transitions. [2018-10-27 08:36:04,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 08:36:04,769 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2018-10-27 08:36:04,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:36:04,811 INFO L225 Difference]: With dead ends: 2162 [2018-10-27 08:36:04,811 INFO L226 Difference]: Without dead ends: 1552 [2018-10-27 08:36:04,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:36:04,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2018-10-27 08:36:04,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1525. [2018-10-27 08:36:04,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1525 states. [2018-10-27 08:36:04,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 2696 transitions. [2018-10-27 08:36:04,977 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 2696 transitions. Word has length 47 [2018-10-27 08:36:04,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:36:04,978 INFO L481 AbstractCegarLoop]: Abstraction has 1525 states and 2696 transitions. [2018-10-27 08:36:04,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 08:36:04,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 2696 transitions. [2018-10-27 08:36:04,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-27 08:36:04,995 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:36:04,996 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:36:04,996 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:36:04,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:36:04,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1100502633, now seen corresponding path program 1 times [2018-10-27 08:36:04,998 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:36:04,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:36:05,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:36:05,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:36:05,000 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:36:05,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:36:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:36:05,399 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:36:05,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 08:36:05,399 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:36:05,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 08:36:05,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 08:36:05,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-27 08:36:05,402 INFO L87 Difference]: Start difference. First operand 1525 states and 2696 transitions. Second operand 6 states. [2018-10-27 08:36:25,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:36:25,036 INFO L93 Difference]: Finished difference Result 5786 states and 10682 transitions. [2018-10-27 08:36:25,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 08:36:25,037 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2018-10-27 08:36:25,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:36:25,075 INFO L225 Difference]: With dead ends: 5786 [2018-10-27 08:36:25,075 INFO L226 Difference]: Without dead ends: 4267 [2018-10-27 08:36:25,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-27 08:36:25,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4267 states. [2018-10-27 08:36:25,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4267 to 4243. [2018-10-27 08:36:25,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4243 states. [2018-10-27 08:36:25,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4243 states to 4243 states and 6361 transitions. [2018-10-27 08:36:25,261 INFO L78 Accepts]: Start accepts. Automaton has 4243 states and 6361 transitions. Word has length 126 [2018-10-27 08:36:25,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:36:25,262 INFO L481 AbstractCegarLoop]: Abstraction has 4243 states and 6361 transitions. [2018-10-27 08:36:25,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 08:36:25,262 INFO L276 IsEmpty]: Start isEmpty. Operand 4243 states and 6361 transitions. [2018-10-27 08:36:25,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-27 08:36:25,266 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:36:25,267 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:36:25,267 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:36:25,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:36:25,268 INFO L82 PathProgramCache]: Analyzing trace with hash 427806551, now seen corresponding path program 1 times [2018-10-27 08:36:25,268 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:36:25,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:36:25,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:36:25,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:36:25,269 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:36:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:36:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:36:25,550 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:36:25,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 08:36:25,550 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:36:25,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 08:36:25,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 08:36:25,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 08:36:25,552 INFO L87 Difference]: Start difference. First operand 4243 states and 6361 transitions. Second operand 6 states. [2018-10-27 08:36:33,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:36:33,511 INFO L93 Difference]: Finished difference Result 12712 states and 20702 transitions. [2018-10-27 08:36:33,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 08:36:33,512 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 127 [2018-10-27 08:36:33,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:36:33,576 INFO L225 Difference]: With dead ends: 12712 [2018-10-27 08:36:33,577 INFO L226 Difference]: Without dead ends: 8475 [2018-10-27 08:36:33,601 INFO L605 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 [2018-10-27 08:36:33,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8475 states. [2018-10-27 08:36:33,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8475 to 8390. [2018-10-27 08:36:33,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8390 states. [2018-10-27 08:36:33,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8390 states to 8390 states and 12580 transitions. [2018-10-27 08:36:33,863 INFO L78 Accepts]: Start accepts. Automaton has 8390 states and 12580 transitions. Word has length 127 [2018-10-27 08:36:33,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:36:33,863 INFO L481 AbstractCegarLoop]: Abstraction has 8390 states and 12580 transitions. [2018-10-27 08:36:33,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 08:36:33,864 INFO L276 IsEmpty]: Start isEmpty. Operand 8390 states and 12580 transitions. [2018-10-27 08:36:33,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-10-27 08:36:33,868 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:36:33,868 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 08:36:33,869 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:36:33,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:36:33,869 INFO L82 PathProgramCache]: Analyzing trace with hash 126489534, now seen corresponding path program 1 times [2018-10-27 08:36:33,869 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:36:33,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:36:33,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:36:33,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:36:33,870 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:36:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:36:34,175 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 08:36:34,240 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 81 proven. 5 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-10-27 08:36:34,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:36:34,241 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:36:34,242 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 202 with the following transitions: [2018-10-27 08:36:34,244 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], [986], [988], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1228], [1232], [1236], [1239], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:36:34,295 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:36:34,295 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:36:35,236 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:36:35,238 INFO L272 AbstractInterpreter]: Visited 88 different actions 250 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 08:36:35,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:36:35,293 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:36:35,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:36:35,293 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:36:35,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:36:35,306 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:36:35,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:36:35,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:36:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 153 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:36:35,854 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:36:36,118 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 153 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:36:36,141 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:36:36,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-27 08:36:36,141 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:36:36,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 08:36:36,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 08:36:36,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-10-27 08:36:36,142 INFO L87 Difference]: Start difference. First operand 8390 states and 12580 transitions. Second operand 9 states. [2018-10-27 08:36:47,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:36:47,628 INFO L93 Difference]: Finished difference Result 20879 states and 31698 transitions. [2018-10-27 08:36:47,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-27 08:36:47,629 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 201 [2018-10-27 08:36:47,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:36:47,731 INFO L225 Difference]: With dead ends: 20879 [2018-10-27 08:36:47,731 INFO L226 Difference]: Without dead ends: 12460 [2018-10-27 08:36:47,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 400 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2018-10-27 08:36:47,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12460 states. [2018-10-27 08:36:48,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12460 to 12432. [2018-10-27 08:36:48,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12432 states. [2018-10-27 08:36:48,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12432 states to 12432 states and 15973 transitions. [2018-10-27 08:36:48,165 INFO L78 Accepts]: Start accepts. Automaton has 12432 states and 15973 transitions. Word has length 201 [2018-10-27 08:36:48,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:36:48,166 INFO L481 AbstractCegarLoop]: Abstraction has 12432 states and 15973 transitions. [2018-10-27 08:36:48,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 08:36:48,166 INFO L276 IsEmpty]: Start isEmpty. Operand 12432 states and 15973 transitions. [2018-10-27 08:36:48,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-10-27 08:36:48,171 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:36:48,171 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 08:36:48,172 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:36:48,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:36:48,172 INFO L82 PathProgramCache]: Analyzing trace with hash 118712312, now seen corresponding path program 1 times [2018-10-27 08:36:48,172 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:36:48,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:36:48,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:36:48,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:36:48,174 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:36:48,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:36:48,518 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 08:36:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 104 proven. 48 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-27 08:36:49,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:36:49,305 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:36:49,305 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 215 with the following transitions: [2018-10-27 08:36:49,306 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], [986], [988], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1239], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:36:49,312 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:36:49,312 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:36:49,649 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:36:49,649 INFO L272 AbstractInterpreter]: Visited 97 different actions 193 times. Merged at 7 different actions 11 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 26 variables. [2018-10-27 08:36:49,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:36:49,684 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:36:49,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:36:49,685 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:36:49,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:36:49,698 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:36:49,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:36:49,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:36:49,995 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-27 08:36:49,996 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:36:50,298 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-27 08:36:50,318 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 08:36:50,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-10-27 08:36:50,319 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:36:50,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 08:36:50,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 08:36:50,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-27 08:36:50,321 INFO L87 Difference]: Start difference. First operand 12432 states and 15973 transitions. Second operand 3 states. [2018-10-27 08:36:54,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:36:54,054 INFO L93 Difference]: Finished difference Result 24858 states and 31940 transitions. [2018-10-27 08:36:54,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 08:36:54,057 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 214 [2018-10-27 08:36:54,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:36:54,106 INFO L225 Difference]: With dead ends: 24858 [2018-10-27 08:36:54,106 INFO L226 Difference]: Without dead ends: 12432 [2018-10-27 08:36:54,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 428 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-27 08:36:54,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12432 states. [2018-10-27 08:36:54,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12432 to 12432. [2018-10-27 08:36:54,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12432 states. [2018-10-27 08:36:54,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12432 states to 12432 states and 15351 transitions. [2018-10-27 08:36:54,418 INFO L78 Accepts]: Start accepts. Automaton has 12432 states and 15351 transitions. Word has length 214 [2018-10-27 08:36:54,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:36:54,419 INFO L481 AbstractCegarLoop]: Abstraction has 12432 states and 15351 transitions. [2018-10-27 08:36:54,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 08:36:54,419 INFO L276 IsEmpty]: Start isEmpty. Operand 12432 states and 15351 transitions. [2018-10-27 08:36:54,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-10-27 08:36:54,429 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:36:54,429 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:36:54,429 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:36:54,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:36:54,430 INFO L82 PathProgramCache]: Analyzing trace with hash 115888515, now seen corresponding path program 1 times [2018-10-27 08:36:54,430 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:36:54,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:36:54,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:36:54,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:36:54,437 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:36:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:36:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 275 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-27 08:36:55,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:36:55,018 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:36:55,018 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 292 with the following transitions: [2018-10-27 08:36:55,019 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], [986], [988], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1231], [1232], [1236], [1239], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:36:55,026 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:36:55,027 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:36:55,311 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:36:55,312 INFO L272 AbstractInterpreter]: Visited 98 different actions 197 times. Merged at 8 different actions 13 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 26 variables. [2018-10-27 08:36:55,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:36:55,353 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:36:55,353 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:36:55,354 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:36:55,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:36:55,366 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:36:55,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:36:55,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:36:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 275 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-27 08:36:55,655 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:36:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 275 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-27 08:36:56,341 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:36:56,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-10-27 08:36:56,341 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:36:56,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 08:36:56,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 08:36:56,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-27 08:36:56,343 INFO L87 Difference]: Start difference. First operand 12432 states and 15351 transitions. Second operand 7 states. [2018-10-27 08:37:14,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:37:14,607 INFO L93 Difference]: Finished difference Result 37387 states and 46750 transitions. [2018-10-27 08:37:14,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-27 08:37:14,608 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 291 [2018-10-27 08:37:14,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:37:14,702 INFO L225 Difference]: With dead ends: 37387 [2018-10-27 08:37:14,703 INFO L226 Difference]: Without dead ends: 24927 [2018-10-27 08:37:14,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 584 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-10-27 08:37:14,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24927 states. [2018-10-27 08:37:15,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24927 to 22770. [2018-10-27 08:37:15,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22770 states. [2018-10-27 08:37:15,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22770 states to 22770 states and 27242 transitions. [2018-10-27 08:37:15,309 INFO L78 Accepts]: Start accepts. Automaton has 22770 states and 27242 transitions. Word has length 291 [2018-10-27 08:37:15,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:37:15,310 INFO L481 AbstractCegarLoop]: Abstraction has 22770 states and 27242 transitions. [2018-10-27 08:37:15,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-27 08:37:15,310 INFO L276 IsEmpty]: Start isEmpty. Operand 22770 states and 27242 transitions. [2018-10-27 08:37:15,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2018-10-27 08:37:15,328 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:37:15,328 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:37:15,328 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:37:15,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:37:15,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1831026004, now seen corresponding path program 1 times [2018-10-27 08:37:15,329 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:37:15,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:37:15,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:37:15,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:37:15,330 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:37:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:37:16,274 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 130 proven. 146 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-10-27 08:37:16,275 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:37:16,275 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:37:16,275 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 338 with the following transitions: [2018-10-27 08:37:16,276 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], [986], [988], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1231], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1443], [1448], [1450], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:37:16,283 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:37:16,283 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:37:16,672 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:37:16,672 INFO L272 AbstractInterpreter]: Visited 135 different actions 270 times. Merged at 8 different actions 14 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 26 variables. [2018-10-27 08:37:16,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:37:16,707 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:37:16,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:37:16,708 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:37:16,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:37:16,910 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:37:17,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:37:17,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:37:19,624 WARN L179 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2018-10-27 08:37:19,741 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 238 proven. 2 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2018-10-27 08:37:19,742 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:37:20,161 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-10-27 08:37:20,264 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-10-27 08:37:22,328 WARN L179 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 39 DAG size of output: 15 [2018-10-27 08:37:22,803 WARN L179 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2018-10-27 08:37:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 130 proven. 227 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 08:37:23,444 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:37:23,444 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2018-10-27 08:37:23,444 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:37:23,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 08:37:23,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 08:37:23,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-10-27 08:37:23,446 INFO L87 Difference]: Start difference. First operand 22770 states and 27242 transitions. Second operand 10 states. [2018-10-27 08:37:54,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:37:54,190 INFO L93 Difference]: Finished difference Result 73663 states and 96008 transitions. [2018-10-27 08:37:54,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-27 08:37:54,200 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 337 [2018-10-27 08:37:54,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:37:54,414 INFO L225 Difference]: With dead ends: 73663 [2018-10-27 08:37:54,415 INFO L226 Difference]: Without dead ends: 47003 [2018-10-27 08:37:54,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 679 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2018-10-27 08:37:54,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47003 states. [2018-10-27 08:37:55,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47003 to 39251. [2018-10-27 08:37:55,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39251 states. [2018-10-27 08:37:55,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39251 states to 39251 states and 48230 transitions. [2018-10-27 08:37:55,594 INFO L78 Accepts]: Start accepts. Automaton has 39251 states and 48230 transitions. Word has length 337 [2018-10-27 08:37:55,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:37:55,595 INFO L481 AbstractCegarLoop]: Abstraction has 39251 states and 48230 transitions. [2018-10-27 08:37:55,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-27 08:37:55,595 INFO L276 IsEmpty]: Start isEmpty. Operand 39251 states and 48230 transitions. [2018-10-27 08:37:55,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2018-10-27 08:37:55,616 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:37:55,617 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:37:55,617 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:37:55,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:37:55,618 INFO L82 PathProgramCache]: Analyzing trace with hash -227933580, now seen corresponding path program 1 times [2018-10-27 08:37:55,618 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:37:55,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:37:55,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:37:55,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:37:55,619 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:37:55,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:37:56,108 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2018-10-27 08:37:56,108 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:37:56,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 08:37:56,109 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:37:56,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 08:37:56,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 08:37:56,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:37:56,112 INFO L87 Difference]: Start difference. First operand 39251 states and 48230 transitions. Second operand 4 states. [2018-10-27 08:38:03,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:38:03,825 INFO L93 Difference]: Finished difference Result 102086 states and 127749 transitions. [2018-10-27 08:38:03,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 08:38:03,826 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 374 [2018-10-27 08:38:03,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:38:04,025 INFO L225 Difference]: With dead ends: 102086 [2018-10-27 08:38:04,025 INFO L226 Difference]: Without dead ends: 50122 [2018-10-27 08:38:04,168 INFO L605 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 [2018-10-27 08:38:04,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50122 states. [2018-10-27 08:38:05,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50122 to 48139. [2018-10-27 08:38:05,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48139 states. [2018-10-27 08:38:05,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48139 states to 48139 states and 57904 transitions. [2018-10-27 08:38:05,163 INFO L78 Accepts]: Start accepts. Automaton has 48139 states and 57904 transitions. Word has length 374 [2018-10-27 08:38:05,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:38:05,164 INFO L481 AbstractCegarLoop]: Abstraction has 48139 states and 57904 transitions. [2018-10-27 08:38:05,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 08:38:05,164 INFO L276 IsEmpty]: Start isEmpty. Operand 48139 states and 57904 transitions. [2018-10-27 08:38:05,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2018-10-27 08:38:05,200 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:38:05,201 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:38:05,201 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:38:05,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:38:05,202 INFO L82 PathProgramCache]: Analyzing trace with hash 479746725, now seen corresponding path program 1 times [2018-10-27 08:38:05,202 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:38:05,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:38:05,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:38:05,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:38:05,203 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:38:05,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:38:06,032 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 389 proven. 2 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2018-10-27 08:38:06,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:38:06,033 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:38:06,033 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 479 with the following transitions: [2018-10-27 08:38:06,033 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], [986], [988], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1376], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1654], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:38:06,038 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:38:06,038 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:38:06,835 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:38:06,835 INFO L272 AbstractInterpreter]: Visited 171 different actions 513 times. Merged at 8 different actions 23 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 26 variables. [2018-10-27 08:38:06,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:38:06,862 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:38:06,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:38:06,862 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:38:06,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:38:06,875 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:38:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:38:07,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:38:07,294 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 389 proven. 2 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2018-10-27 08:38:07,294 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:38:07,922 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 389 proven. 2 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2018-10-27 08:38:07,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:38:07,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2018-10-27 08:38:07,954 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:38:07,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 08:38:07,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 08:38:07,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-27 08:38:07,956 INFO L87 Difference]: Start difference. First operand 48139 states and 57904 transitions. Second operand 6 states. [2018-10-27 08:38:19,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:38:19,692 INFO L93 Difference]: Finished difference Result 108759 states and 132498 transitions. [2018-10-27 08:38:19,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-27 08:38:19,692 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 478 [2018-10-27 08:38:19,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:38:19,860 INFO L225 Difference]: With dead ends: 108759 [2018-10-27 08:38:19,860 INFO L226 Difference]: Without dead ends: 55059 [2018-10-27 08:38:19,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 970 GetRequests, 958 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-10-27 08:38:20,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55059 states. [2018-10-27 08:38:20,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55059 to 50352. [2018-10-27 08:38:20,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50352 states. [2018-10-27 08:38:21,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50352 states to 50352 states and 61531 transitions. [2018-10-27 08:38:21,078 INFO L78 Accepts]: Start accepts. Automaton has 50352 states and 61531 transitions. Word has length 478 [2018-10-27 08:38:21,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:38:21,079 INFO L481 AbstractCegarLoop]: Abstraction has 50352 states and 61531 transitions. [2018-10-27 08:38:21,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 08:38:21,079 INFO L276 IsEmpty]: Start isEmpty. Operand 50352 states and 61531 transitions. [2018-10-27 08:38:21,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2018-10-27 08:38:21,127 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:38:21,127 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:38:21,127 INFO L424 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:38:21,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:38:21,128 INFO L82 PathProgramCache]: Analyzing trace with hash 610369496, now seen corresponding path program 1 times [2018-10-27 08:38:21,128 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:38:21,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:38:21,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:38:21,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:38:21,129 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:38:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:38:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 389 proven. 2 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2018-10-27 08:38:21,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:38:21,694 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:38:21,694 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 498 with the following transitions: [2018-10-27 08:38:21,695 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], [986], [988], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1376], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1758], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:38:21,700 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:38:21,700 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:38:22,533 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:38:22,534 INFO L272 AbstractInterpreter]: Visited 190 different actions 570 times. Merged at 8 different actions 23 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 26 variables. [2018-10-27 08:38:22,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:38:22,571 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:38:22,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:38:22,572 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-27 08:38:22,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:38:22,587 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:38:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:38:22,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:38:23,213 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 389 proven. 2 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2018-10-27 08:38:23,213 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:38:23,688 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 389 proven. 2 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2018-10-27 08:38:23,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:38:23,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2018-10-27 08:38:23,722 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:38:23,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 08:38:23,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 08:38:23,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-27 08:38:23,724 INFO L87 Difference]: Start difference. First operand 50352 states and 61531 transitions. Second operand 6 states. [2018-10-27 08:38:42,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:38:42,685 INFO L93 Difference]: Finished difference Result 115554 states and 143665 transitions. [2018-10-27 08:38:42,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-27 08:38:42,694 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 497 [2018-10-27 08:38:42,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:38:42,857 INFO L225 Difference]: With dead ends: 115554 [2018-10-27 08:38:42,857 INFO L226 Difference]: Without dead ends: 60591 [2018-10-27 08:38:42,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1007 GetRequests, 994 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2018-10-27 08:38:42,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60591 states. [2018-10-27 08:38:44,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60591 to 57575. [2018-10-27 08:38:44,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57575 states. [2018-10-27 08:38:44,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57575 states to 57575 states and 70070 transitions. [2018-10-27 08:38:44,542 INFO L78 Accepts]: Start accepts. Automaton has 57575 states and 70070 transitions. Word has length 497 [2018-10-27 08:38:44,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:38:44,543 INFO L481 AbstractCegarLoop]: Abstraction has 57575 states and 70070 transitions. [2018-10-27 08:38:44,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 08:38:44,543 INFO L276 IsEmpty]: Start isEmpty. Operand 57575 states and 70070 transitions. [2018-10-27 08:38:44,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2018-10-27 08:38:44,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:38:44,587 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:38:44,588 INFO L424 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:38:44,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:38:44,588 INFO L82 PathProgramCache]: Analyzing trace with hash -569907959, now seen corresponding path program 1 times [2018-10-27 08:38:44,588 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:38:44,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:38:44,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:38:44,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:38:44,589 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:38:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:38:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 128 proven. 2 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2018-10-27 08:38:44,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:38:44,946 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:38:44,947 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 501 with the following transitions: [2018-10-27 08:38:44,947 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], [986], [988], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1420], [1425], [1427], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2031], [2034], [2038], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:38:44,956 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:38:44,956 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:38:45,504 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:38:45,504 INFO L272 AbstractInterpreter]: Visited 256 different actions 510 times. Merged at 8 different actions 14 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 26 variables. [2018-10-27 08:38:45,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:38:45,543 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:38:45,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:38:45,543 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:38:45,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:38:45,555 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:38:45,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:38:45,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:38:45,824 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 287 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2018-10-27 08:38:45,824 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:38:45,972 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 128 proven. 2 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2018-10-27 08:38:45,993 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 08:38:45,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 3 [2018-10-27 08:38:45,994 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:38:45,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 08:38:45,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 08:38:45,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 08:38:45,995 INFO L87 Difference]: Start difference. First operand 57575 states and 70070 transitions. Second operand 3 states. [2018-10-27 08:38:50,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:38:50,380 INFO L93 Difference]: Finished difference Result 134725 states and 165861 transitions. [2018-10-27 08:38:50,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 08:38:50,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 500 [2018-10-27 08:38:50,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:38:50,530 INFO L225 Difference]: With dead ends: 134725 [2018-10-27 08:38:50,530 INFO L226 Difference]: Without dead ends: 66291 [2018-10-27 08:38:50,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1002 GetRequests, 1001 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 08:38:50,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66291 states. [2018-10-27 08:38:51,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66291 to 63637. [2018-10-27 08:38:51,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63637 states. [2018-10-27 08:38:51,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63637 states to 63637 states and 76782 transitions. [2018-10-27 08:38:51,647 INFO L78 Accepts]: Start accepts. Automaton has 63637 states and 76782 transitions. Word has length 500 [2018-10-27 08:38:51,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:38:51,648 INFO L481 AbstractCegarLoop]: Abstraction has 63637 states and 76782 transitions. [2018-10-27 08:38:51,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 08:38:51,648 INFO L276 IsEmpty]: Start isEmpty. Operand 63637 states and 76782 transitions. [2018-10-27 08:38:51,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2018-10-27 08:38:51,676 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:38:51,677 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-27 08:38:51,677 INFO L424 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:38:51,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:38:51,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1761012760, now seen corresponding path program 1 times [2018-10-27 08:38:51,678 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:38:51,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:38:51,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:38:51,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:38:51,679 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:38:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:38:52,098 INFO L134 CoverageAnalysis]: Checked inductivity of 763 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2018-10-27 08:38:52,098 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:38:52,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 08:38:52,098 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:38:52,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 08:38:52,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 08:38:52,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 08:38:52,100 INFO L87 Difference]: Start difference. First operand 63637 states and 76782 transitions. Second operand 3 states. [2018-10-27 08:38:56,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:38:56,481 INFO L93 Difference]: Finished difference Result 133997 states and 162916 transitions. [2018-10-27 08:38:56,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 08:38:56,482 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 583 [2018-10-27 08:38:56,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:38:56,639 INFO L225 Difference]: With dead ends: 133997 [2018-10-27 08:38:56,639 INFO L226 Difference]: Without dead ends: 66058 [2018-10-27 08:38:56,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 08:38:56,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66058 states. [2018-10-27 08:38:58,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66058 to 59507. [2018-10-27 08:38:58,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59507 states. [2018-10-27 08:38:58,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59507 states to 59507 states and 70186 transitions. [2018-10-27 08:38:58,318 INFO L78 Accepts]: Start accepts. Automaton has 59507 states and 70186 transitions. Word has length 583 [2018-10-27 08:38:58,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:38:58,319 INFO L481 AbstractCegarLoop]: Abstraction has 59507 states and 70186 transitions. [2018-10-27 08:38:58,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 08:38:58,319 INFO L276 IsEmpty]: Start isEmpty. Operand 59507 states and 70186 transitions. [2018-10-27 08:38:58,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 950 [2018-10-27 08:38:58,400 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:38:58,401 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:38:58,401 INFO L424 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:38:58,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:38:58,402 INFO L82 PathProgramCache]: Analyzing trace with hash -483040668, now seen corresponding path program 1 times [2018-10-27 08:38:58,402 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:38:58,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:38:58,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:38:58,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:38:58,403 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:38:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:38:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 532 proven. 114 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2018-10-27 08:38:59,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:38:59,338 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:38:59,339 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 950 with the following transitions: [2018-10-27 08:38:59,339 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [26], [37], [41], [45], [56], [60], [64], [68], [72], [76], [80], [84], [88], [92], [96], [100], [104], [115], [119], [123], [127], [138], [142], [146], [150], [154], [158], [169], [173], [177], [181], [185], [189], [193], [204], [208], [212], [216], [227], [231], [235], [239], [250], [254], [258], [262], [266], [270], [274], [278], [282], [286], [297], [301], [305], [309], [313], [317], [321], [325], [336], [340], [344], [348], [352], [363], [367], [371], [375], [379], [383], [387], [390], [710], [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], [986], [988], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [1385], [1389], [1393], [1397], [1401], [1404], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1917], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2039], [2043], [2047], [2051], [2055], [2066], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2159], [2163], [2167], [2171], [2175], [2179], [2183], [2187], [2191], [2202], [2206], [2210], [2214], [2218], [2229], [2233], [2237], [2241], [2252], [2256], [2260], [2264], [2268], [2272], [2276], [2278], [2279], [2283], [2287], [2293], [2297], [2299], [2304], [2305], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:38:59,347 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:38:59,347 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:39:01,991 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:39:01,992 INFO L272 AbstractInterpreter]: Visited 384 different actions 771 times. Merged at 10 different actions 18 times. Never widened. Found 5 fixpoints after 3 different actions. Largest state had 26 variables. [2018-10-27 08:39:02,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:39:02,026 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:39:02,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:39:02,026 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:39:02,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:39:02,038 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:39:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:39:02,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:39:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 1006 proven. 2 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-10-27 08:39:02,825 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:39:04,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 532 proven. 114 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2018-10-27 08:39:04,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:39:04,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2018-10-27 08:39:04,134 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:39:04,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 08:39:04,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 08:39:04,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-27 08:39:04,135 INFO L87 Difference]: Start difference. First operand 59507 states and 70186 transitions. Second operand 6 states. [2018-10-27 08:39:14,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:39:14,945 INFO L93 Difference]: Finished difference Result 133651 states and 158584 transitions. [2018-10-27 08:39:14,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-27 08:39:14,946 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 949 [2018-10-27 08:39:14,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:39:15,112 INFO L225 Difference]: With dead ends: 133651 [2018-10-27 08:39:15,112 INFO L226 Difference]: Without dead ends: 75026 [2018-10-27 08:39:15,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1910 GetRequests, 1898 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-10-27 08:39:15,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75026 states. [2018-10-27 08:39:15,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75026 to 70427. [2018-10-27 08:39:15,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70427 states. [2018-10-27 08:39:16,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70427 states to 70427 states and 81935 transitions. [2018-10-27 08:39:16,045 INFO L78 Accepts]: Start accepts. Automaton has 70427 states and 81935 transitions. Word has length 949 [2018-10-27 08:39:16,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:39:16,045 INFO L481 AbstractCegarLoop]: Abstraction has 70427 states and 81935 transitions. [2018-10-27 08:39:16,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 08:39:16,046 INFO L276 IsEmpty]: Start isEmpty. Operand 70427 states and 81935 transitions. [2018-10-27 08:39:16,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 956 [2018-10-27 08:39:16,151 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:39:16,152 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:39:16,152 INFO L424 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:39:16,152 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:39:16,153 INFO L82 PathProgramCache]: Analyzing trace with hash -630462077, now seen corresponding path program 1 times [2018-10-27 08:39:16,153 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:39:16,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:39:16,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:39:16,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:39:16,154 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:39:16,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:39:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 176 proven. 5 refuted. 0 times theorem prover too weak. 762 trivial. 0 not checked. [2018-10-27 08:39:17,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:39:17,439 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:39:17,439 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 956 with the following transitions: [2018-10-27 08:39:17,440 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [21], [22], [26], [37], [41], [45], [56], [60], [64], [68], [72], [76], [80], [84], [88], [92], [96], [100], [104], [115], [119], [123], [127], [138], [142], [146], [150], [154], [158], [169], [173], [177], [181], [185], [189], [193], [204], [208], [212], [216], [227], [231], [235], [239], [250], [254], [258], [262], [266], [270], [274], [278], [282], [286], [297], [301], [305], [309], [313], [317], [321], [325], [336], [340], [344], [348], [352], [363], [367], [371], [375], [379], [383], [387], [391], [395], [399], [403], [407], [411], [415], [426], [430], [434], [445], [449], [453], [464], [475], [479], [483], [487], [491], [495], [499], [503], [507], [511], [515], [519], [530], [534], [538], [549], [553], [557], [561], [565], [569], [573], [584], [587], [590], [594], [710], [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], [986], [988], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2039], [2043], [2047], [2051], [2055], [2066], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2159], [2163], [2167], [2171], [2175], [2179], [2183], [2187], [2191], [2202], [2206], [2210], [2214], [2218], [2229], [2233], [2237], [2241], [2252], [2256], [2260], [2264], [2268], [2272], [2276], [2278], [2279], [2283], [2287], [2293], [2297], [2299], [2304], [2305], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:39:17,447 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:39:17,448 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:39:18,576 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:39:18,577 INFO L272 AbstractInterpreter]: Visited 421 different actions 839 times. Merged at 8 different actions 13 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 26 variables. [2018-10-27 08:39:18,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:39:18,612 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:39:18,612 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:39:18,612 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:39:18,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:39:18,630 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:39:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:39:18,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:39:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 787 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-10-27 08:39:20,071 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:39:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 182 proven. 11 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2018-10-27 08:39:20,566 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 08:39:20,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2018-10-27 08:39:20,566 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:39:20,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 08:39:20,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 08:39:20,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 08:39:20,568 INFO L87 Difference]: Start difference. First operand 70427 states and 81935 transitions. Second operand 3 states. [2018-10-27 08:39:23,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:39:23,305 INFO L93 Difference]: Finished difference Result 133743 states and 155967 transitions. [2018-10-27 08:39:23,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 08:39:23,309 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 955 [2018-10-27 08:39:23,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:39:23,490 INFO L225 Difference]: With dead ends: 133743 [2018-10-27 08:39:23,491 INFO L226 Difference]: Without dead ends: 63764 [2018-10-27 08:39:23,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1913 GetRequests, 1905 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 08:39:23,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63764 states. [2018-10-27 08:39:24,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63764 to 62876. [2018-10-27 08:39:24,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62876 states. [2018-10-27 08:39:24,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62876 states to 62876 states and 73252 transitions. [2018-10-27 08:39:24,673 INFO L78 Accepts]: Start accepts. Automaton has 62876 states and 73252 transitions. Word has length 955 [2018-10-27 08:39:24,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:39:24,674 INFO L481 AbstractCegarLoop]: Abstraction has 62876 states and 73252 transitions. [2018-10-27 08:39:24,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 08:39:24,674 INFO L276 IsEmpty]: Start isEmpty. Operand 62876 states and 73252 transitions. [2018-10-27 08:39:24,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1033 [2018-10-27 08:39:24,729 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:39:24,729 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:39:24,730 INFO L424 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:39:24,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:39:24,730 INFO L82 PathProgramCache]: Analyzing trace with hash -825363577, now seen corresponding path program 1 times [2018-10-27 08:39:24,730 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:39:24,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:39:24,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:39:24,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:39:24,731 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:39:24,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:39:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1911 backedges. 620 proven. 259 refuted. 0 times theorem prover too weak. 1032 trivial. 0 not checked. [2018-10-27 08:39:25,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:39:25,822 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:39:25,822 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1033 with the following transitions: [2018-10-27 08:39:25,822 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [26], [37], [41], [45], [56], [60], [64], [68], [72], [76], [80], [84], [88], [92], [96], [100], [104], [115], [119], [123], [127], [138], [142], [146], [150], [154], [158], [169], [173], [177], [181], [185], [189], [193], [204], [208], [212], [216], [227], [231], [235], [239], [250], [254], [258], [262], [266], [270], [274], [278], [282], [286], [297], [301], [305], [309], [313], [317], [321], [325], [336], [340], [344], [348], [352], [363], [367], [371], [375], [379], [383], [387], [390], [710], [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], [986], [988], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [1385], [1389], [1393], [1397], [1401], [1404], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1585], [1588], [1592], [1593], [1597], [1600], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2039], [2043], [2047], [2051], [2055], [2066], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2159], [2163], [2167], [2171], [2175], [2179], [2183], [2187], [2191], [2202], [2206], [2210], [2214], [2218], [2229], [2233], [2237], [2241], [2252], [2256], [2260], [2264], [2268], [2272], [2276], [2278], [2279], [2283], [2287], [2293], [2297], [2299], [2304], [2305], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:39:25,829 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:39:25,829 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:39:26,967 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:39:26,967 INFO L272 AbstractInterpreter]: Visited 387 different actions 775 times. Merged at 10 different actions 18 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 26 variables. [2018-10-27 08:39:27,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:39:27,008 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:39:27,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:39:27,008 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:39:27,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:39:27,019 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:39:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:39:27,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:39:27,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1911 backedges. 1432 proven. 2 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2018-10-27 08:39:27,763 INFO L316 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2018-10-27 08:39:28,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1911 backedges. 620 proven. 259 refuted. 0 times theorem prover too weak. 1032 trivial. 0 not checked. [2018-10-27 08:39:28,765 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:39:28,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2018-10-27 08:39:28,766 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:39:28,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 08:39:28,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 08:39:28,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-27 08:39:28,768 INFO L87 Difference]: Start difference. First operand 62876 states and 73252 transitions. Second operand 6 states. [2018-10-27 08:39:28,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-27 08:39:28,769 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-27 08:39:28,775 WARN L205 ceAbstractionStarter]: Timeout [2018-10-27 08:39:28,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 08:39:28 BoogieIcfgContainer [2018-10-27 08:39:28,776 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 08:39:28,777 INFO L168 Benchmark]: Toolchain (without parser) took 229249.13 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.3 GB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 131.2 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-10-27 08:39:28,778 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 08:39:28,778 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1539.61 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. [2018-10-27 08:39:28,779 INFO L168 Benchmark]: Boogie Procedure Inliner took 413.20 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 799.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -961.3 MB). Peak memory consumption was 56.2 MB. Max. memory is 7.1 GB. [2018-10-27 08:39:28,780 INFO L168 Benchmark]: Boogie Preprocessor took 254.25 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 27.5 MB). Peak memory consumption was 27.5 MB. Max. memory is 7.1 GB. [2018-10-27 08:39:28,781 INFO L168 Benchmark]: RCFGBuilder took 12295.04 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: 467.9 MB). Peak memory consumption was 467.9 MB. Max. memory is 7.1 GB. [2018-10-27 08:39:28,781 INFO L168 Benchmark]: TraceAbstraction took 214741.99 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.5 GB). Free memory was 1.7 GB in the beginning and 1.3 GB in the end (delta: 459.7 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-10-27 08:39:28,786 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1539.61 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 413.20 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 799.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -961.3 MB). Peak memory consumption was 56.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 254.25 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 27.5 MB). Peak memory consumption was 27.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 12295.04 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: 467.9 MB). Peak memory consumption was 467.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 214741.99 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.5 GB). Free memory was 1.7 GB in the beginning and 1.3 GB in the end (delta: 459.7 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 128]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 128). Cancelled while BasicCegarLoop was constructing difference of abstraction (62876states) and FLOYD_HOARE automaton (currently 2 states, 6 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 214.6s OverallTime, 15 OverallIterations, 7 TraceHistogramMax, 165.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4889 SDtfs, 22547 SDslu, 3563 SDs, 0 SdLazy, 46467 SolverSat, 9586 SolverUnsat, 12 SolverUnknown, 0 SolverNotchecked, 143.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11063 GetRequests, 10921 SyntacticMatches, 25 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 10.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70427occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 9.5s AbstIntTime, 10 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 11.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 34471 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 22.1s InterpolantComputationTime, 12165 NumberOfCodeBlocks, 12165 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 17584 ConstructedInterpolants, 93 QuantifiedInterpolants, 20159437 SizeOfPredicates, 12 NumberOfNonLiveVariables, 8130 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 35 InterpolantComputations, 9 PerfectInterpolantSequences, 20924/22144 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown