java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label44_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 15:45:50,521 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 15:45:50,524 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 15:45:50,541 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 15:45:50,541 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 15:45:50,542 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 15:45:50,544 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 15:45:50,546 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 15:45:50,550 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 15:45:50,559 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 15:45:50,560 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 15:45:50,560 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 15:45:50,562 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 15:45:50,563 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 15:45:50,564 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 15:45:50,567 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 15:45:50,568 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 15:45:50,569 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 15:45:50,572 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 15:45:50,577 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 15:45:50,578 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 15:45:50,580 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 15:45:50,586 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-11-07 15:45:50,593 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 15:45:50,594 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 15:45:50,595 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 15:45:50,595 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 15:45:50,596 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-11-07 15:45:50,614 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 15:45:50,614 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 15:45:50,615 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 15:45:50,615 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 15:45:50,615 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 15:45:50,615 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 15:45:50,616 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 15:45:50,616 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 15:45:50,616 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 15:45:50,616 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 15:45:50,616 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 15:45:50,616 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 15:45:50,617 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 15:45:50,617 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 15:45:50,618 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 15:45:50,618 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 15:45:50,618 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 15:45:50,618 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 15:45:50,618 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 15:45:50,619 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 15:45:50,619 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 15:45:50,619 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 15:45:50,619 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 15:45:50,619 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 15:45:50,620 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 15:45:50,620 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 15:45:50,620 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 15:45:50,620 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 15:45:50,620 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 15:45:50,621 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 15:45:50,621 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 15:45:50,621 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 15:45:50,621 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 15:45:50,621 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 15:45:50,667 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 15:45:50,682 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 15:45:50,687 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 15:45:50,689 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 15:45:50,690 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 15:45:50,690 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label44_true-unreach-call.c [2018-11-07 15:45:50,772 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c14aaaad6/179d41b285ff47399cce2ab9773e2709/FLAG0e0fb1dfa [2018-11-07 15:45:51,491 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 15:45:51,493 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label44_true-unreach-call.c [2018-11-07 15:45:51,520 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c14aaaad6/179d41b285ff47399cce2ab9773e2709/FLAG0e0fb1dfa [2018-11-07 15:45:51,539 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c14aaaad6/179d41b285ff47399cce2ab9773e2709 [2018-11-07 15:45:51,552 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 15:45:51,555 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 15:45:51,556 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 15:45:51,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 15:45:51,563 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 15:45:51,564 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:45:51" (1/1) ... [2018-11-07 15:45:51,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1342862e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:45:51, skipping insertion in model container [2018-11-07 15:45:51,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:45:51" (1/1) ... [2018-11-07 15:45:51,581 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 15:45:51,719 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 15:45:52,751 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:45:52,756 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 15:45:53,234 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:45:53,264 INFO L193 MainTranslator]: Completed translation [2018-11-07 15:45:53,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:45:53 WrapperNode [2018-11-07 15:45:53,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 15:45:53,266 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 15:45:53,266 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 15:45:53,266 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 15:45:53,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:45:53" (1/1) ... [2018-11-07 15:45:53,527 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:45:53" (1/1) ... [2018-11-07 15:45:53,538 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 15:45:53,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 15:45:53,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 15:45:53,539 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 15:45:53,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:45:53" (1/1) ... [2018-11-07 15:45:53,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:45:53" (1/1) ... [2018-11-07 15:45:53,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:45:53" (1/1) ... [2018-11-07 15:45:53,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:45:53" (1/1) ... [2018-11-07 15:45:53,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:45:53" (1/1) ... [2018-11-07 15:45:53,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:45:53" (1/1) ... [2018-11-07 15:45:53,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:45:53" (1/1) ... [2018-11-07 15:45:53,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 15:45:53,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 15:45:53,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 15:45:53,743 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 15:45:53,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:45:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 15:45:53,813 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 15:45:53,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 15:45:53,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 15:45:53,814 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-11-07 15:45:53,814 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-11-07 15:45:53,814 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 15:45:53,815 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 15:45:53,815 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 15:45:53,815 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 15:45:53,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 15:45:53,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 15:45:53,816 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 15:45:53,816 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 15:46:01,508 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 15:46:01,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:46:01 BoogieIcfgContainer [2018-11-07 15:46:01,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 15:46:01,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 15:46:01,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 15:46:01,513 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 15:46:01,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:45:51" (1/3) ... [2018-11-07 15:46:01,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38a4750a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:46:01, skipping insertion in model container [2018-11-07 15:46:01,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:45:53" (2/3) ... [2018-11-07 15:46:01,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38a4750a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:46:01, skipping insertion in model container [2018-11-07 15:46:01,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:46:01" (3/3) ... [2018-11-07 15:46:01,517 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label44_true-unreach-call.c [2018-11-07 15:46:01,527 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 15:46:01,537 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 15:46:01,555 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 15:46:01,596 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 15:46:01,596 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 15:46:01,596 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 15:46:01,596 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 15:46:01,597 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 15:46:01,597 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 15:46:01,597 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 15:46:01,597 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 15:46:01,640 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states. [2018-11-07 15:46:01,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-07 15:46:01,649 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:46:01,650 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] [2018-11-07 15:46:01,652 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:46:01,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:46:01,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1357695353, now seen corresponding path program 1 times [2018-11-07 15:46:01,660 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:46:01,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:46:01,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:46:01,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:46:01,711 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:46:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:46:02,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:46:02,136 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:46:02,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 15:46:02,136 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:46:02,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 15:46:02,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 15:46:02,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:46:02,162 INFO L87 Difference]: Start difference. First operand 775 states. Second operand 4 states. [2018-11-07 15:46:12,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:46:12,727 INFO L93 Difference]: Finished difference Result 2974 states and 5747 transitions. [2018-11-07 15:46:12,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 15:46:12,729 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2018-11-07 15:46:12,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:46:12,768 INFO L225 Difference]: With dead ends: 2974 [2018-11-07 15:46:12,769 INFO L226 Difference]: Without dead ends: 2193 [2018-11-07 15:46:12,780 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:46:12,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2193 states. [2018-11-07 15:46:12,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2193 to 1474. [2018-11-07 15:46:12,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1474 states. [2018-11-07 15:46:12,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 2384 transitions. [2018-11-07 15:46:12,946 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 2384 transitions. Word has length 39 [2018-11-07 15:46:12,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:46:12,946 INFO L480 AbstractCegarLoop]: Abstraction has 1474 states and 2384 transitions. [2018-11-07 15:46:12,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 15:46:12,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 2384 transitions. [2018-11-07 15:46:12,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-07 15:46:12,955 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:46:12,956 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:46:12,957 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:46:12,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:46:12,957 INFO L82 PathProgramCache]: Analyzing trace with hash -947150568, now seen corresponding path program 1 times [2018-11-07 15:46:12,958 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:46:12,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:46:12,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:46:12,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:46:12,959 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:46:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:46:13,342 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:46:13,343 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:46:13,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 15:46:13,343 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:46:13,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 15:46:13,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 15:46:13,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 15:46:13,346 INFO L87 Difference]: Start difference. First operand 1474 states and 2384 transitions. Second operand 5 states. [2018-11-07 15:46:24,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:46:24,373 INFO L93 Difference]: Finished difference Result 4422 states and 7235 transitions. [2018-11-07 15:46:24,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:46:24,376 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 109 [2018-11-07 15:46:24,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:46:24,398 INFO L225 Difference]: With dead ends: 4422 [2018-11-07 15:46:24,399 INFO L226 Difference]: Without dead ends: 2954 [2018-11-07 15:46:24,405 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 15:46:24,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2018-11-07 15:46:24,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2930. [2018-11-07 15:46:24,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2930 states. [2018-11-07 15:46:24,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2930 states to 2930 states and 4516 transitions. [2018-11-07 15:46:24,508 INFO L78 Accepts]: Start accepts. Automaton has 2930 states and 4516 transitions. Word has length 109 [2018-11-07 15:46:24,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:46:24,509 INFO L480 AbstractCegarLoop]: Abstraction has 2930 states and 4516 transitions. [2018-11-07 15:46:24,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 15:46:24,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2930 states and 4516 transitions. [2018-11-07 15:46:24,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-11-07 15:46:24,513 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:46:24,514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:46:24,514 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:46:24,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:46:24,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1923837536, now seen corresponding path program 1 times [2018-11-07 15:46:24,515 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:46:24,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:46:24,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:46:24,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:46:24,516 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:46:24,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:46:24,800 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:46:24,801 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:46:24,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:46:24,801 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:46:24,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:46:24,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:46:24,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:46:24,803 INFO L87 Difference]: Start difference. First operand 2930 states and 4516 transitions. Second operand 6 states. [2018-11-07 15:46:32,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:46:32,898 INFO L93 Difference]: Finished difference Result 10279 states and 16084 transitions. [2018-11-07 15:46:32,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:46:32,905 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2018-11-07 15:46:32,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:46:32,944 INFO L225 Difference]: With dead ends: 10279 [2018-11-07 15:46:32,944 INFO L226 Difference]: Without dead ends: 7355 [2018-11-07 15:46:32,961 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:46:32,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7355 states. [2018-11-07 15:46:33,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7355 to 7296. [2018-11-07 15:46:33,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7296 states. [2018-11-07 15:46:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7296 states to 7296 states and 10495 transitions. [2018-11-07 15:46:33,143 INFO L78 Accepts]: Start accepts. Automaton has 7296 states and 10495 transitions. Word has length 113 [2018-11-07 15:46:33,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:46:33,144 INFO L480 AbstractCegarLoop]: Abstraction has 7296 states and 10495 transitions. [2018-11-07 15:46:33,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:46:33,144 INFO L276 IsEmpty]: Start isEmpty. Operand 7296 states and 10495 transitions. [2018-11-07 15:46:33,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-11-07 15:46:33,147 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:46:33,151 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:46:33,151 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:46:33,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:46:33,151 INFO L82 PathProgramCache]: Analyzing trace with hash 397539053, now seen corresponding path program 1 times [2018-11-07 15:46:33,151 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:46:33,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:46:33,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:46:33,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:46:33,153 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:46:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:46:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:46:33,508 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:46:33,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:46:33,509 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:46:33,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:46:33,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:46:33,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:46:33,510 INFO L87 Difference]: Start difference. First operand 7296 states and 10495 transitions. Second operand 6 states. [2018-11-07 15:46:41,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:46:41,451 INFO L93 Difference]: Finished difference Result 18993 states and 28013 transitions. [2018-11-07 15:46:41,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:46:41,454 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2018-11-07 15:46:41,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:46:41,517 INFO L225 Difference]: With dead ends: 18993 [2018-11-07 15:46:41,518 INFO L226 Difference]: Without dead ends: 11703 [2018-11-07 15:46:41,548 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:46:41,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11703 states. [2018-11-07 15:46:41,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11703 to 11639. [2018-11-07 15:46:41,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11639 states. [2018-11-07 15:46:41,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11639 states to 11639 states and 16002 transitions. [2018-11-07 15:46:41,823 INFO L78 Accepts]: Start accepts. Automaton has 11639 states and 16002 transitions. Word has length 134 [2018-11-07 15:46:41,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:46:41,824 INFO L480 AbstractCegarLoop]: Abstraction has 11639 states and 16002 transitions. [2018-11-07 15:46:41,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:46:41,825 INFO L276 IsEmpty]: Start isEmpty. Operand 11639 states and 16002 transitions. [2018-11-07 15:46:41,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-11-07 15:46:41,828 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:46:41,829 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:46:41,829 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:46:41,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:46:41,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1776632544, now seen corresponding path program 1 times [2018-11-07 15:46:41,830 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:46:41,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:46:41,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:46:41,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:46:41,831 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:46:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:46:42,126 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 15:46:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:46:42,498 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:46:42,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:46:42,498 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:46:42,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:46:42,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:46:42,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:46:42,500 INFO L87 Difference]: Start difference. First operand 11639 states and 16002 transitions. Second operand 6 states. [2018-11-07 15:46:48,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:46:48,550 INFO L93 Difference]: Finished difference Result 27658 states and 38922 transitions. [2018-11-07 15:46:48,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:46:48,551 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 177 [2018-11-07 15:46:48,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:46:48,624 INFO L225 Difference]: With dead ends: 27658 [2018-11-07 15:46:48,624 INFO L226 Difference]: Without dead ends: 16025 [2018-11-07 15:46:48,664 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:46:48,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16025 states. [2018-11-07 15:46:49,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16025 to 15947. [2018-11-07 15:46:49,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15947 states. [2018-11-07 15:46:49,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15947 states to 15947 states and 19810 transitions. [2018-11-07 15:46:49,295 INFO L78 Accepts]: Start accepts. Automaton has 15947 states and 19810 transitions. Word has length 177 [2018-11-07 15:46:49,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:46:49,297 INFO L480 AbstractCegarLoop]: Abstraction has 15947 states and 19810 transitions. [2018-11-07 15:46:49,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:46:49,297 INFO L276 IsEmpty]: Start isEmpty. Operand 15947 states and 19810 transitions. [2018-11-07 15:46:49,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-11-07 15:46:49,302 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:46:49,303 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:46:49,303 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:46:49,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:46:49,303 INFO L82 PathProgramCache]: Analyzing trace with hash 952767299, now seen corresponding path program 1 times [2018-11-07 15:46:49,304 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:46:49,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:46:49,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:46:49,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:46:49,305 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:46:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:46:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-11-07 15:46:49,580 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:46:49,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 15:46:49,580 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:46:49,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 15:46:49,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 15:46:49,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:46:49,582 INFO L87 Difference]: Start difference. First operand 15947 states and 19810 transitions. Second operand 4 states. [2018-11-07 15:46:56,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:46:56,822 INFO L93 Difference]: Finished difference Result 60752 states and 78092 transitions. [2018-11-07 15:46:56,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 15:46:56,822 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 235 [2018-11-07 15:46:56,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:46:56,971 INFO L225 Difference]: With dead ends: 60752 [2018-11-07 15:46:56,971 INFO L226 Difference]: Without dead ends: 44811 [2018-11-07 15:46:57,034 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:46:57,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44811 states. [2018-11-07 15:46:58,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44811 to 44811. [2018-11-07 15:46:58,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44811 states. [2018-11-07 15:46:58,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44811 states to 44811 states and 55159 transitions. [2018-11-07 15:46:58,209 INFO L78 Accepts]: Start accepts. Automaton has 44811 states and 55159 transitions. Word has length 235 [2018-11-07 15:46:58,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:46:58,210 INFO L480 AbstractCegarLoop]: Abstraction has 44811 states and 55159 transitions. [2018-11-07 15:46:58,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 15:46:58,210 INFO L276 IsEmpty]: Start isEmpty. Operand 44811 states and 55159 transitions. [2018-11-07 15:46:58,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-11-07 15:46:58,232 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:46:58,233 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:46:58,233 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:46:58,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:46:58,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1249259458, now seen corresponding path program 1 times [2018-11-07 15:46:58,234 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:46:58,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:46:58,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:46:58,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:46:58,235 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:46:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:46:58,588 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 15:46:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 59 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:46:59,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 15:46:59,296 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 15:46:59,297 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 301 with the following transitions: [2018-11-07 15:46:59,299 INFO L202 CegarAbsIntRunner]: [0], [1], [1624], [1631], [1639], [1647], [1655], [1663], [1671], [1679], [1687], [1695], [1703], [1711], [1719], [1727], [1735], [1743], [1751], [1759], [1767], [1775], [1783], [1791], [1799], [1807], [1815], [1823], [1831], [1835], [1837], [1840], [1848], [1856], [1864], [1872], [1880], [1888], [1896], [1904], [1912], [1920], [1928], [1936], [1944], [1952], [1960], [1968], [1976], [1984], [1992], [2000], [2008], [2016], [2024], [2032], [2040], [2048], [2056], [2064], [2072], [2080], [2088], [2096], [2104], [2112], [2117], [2121], [2125], [2129], [2133], [2137], [2141], [2145], [2149], [2153], [2157], [2161], [2165], [2169], [2173], [2177], [2181], [2185], [2189], [2193], [2197], [2201], [2205], [2209], [2213], [2217], [2221], [2225], [2229], [2233], [2237], [2241], [2245], [2249], [2253], [2257], [2261], [2265], [2269], [2273], [2277], [2281], [2285], [2289], [2293], [2297], [2301], [2305], [2309], [2313], [2317], [2321], [2325], [2328], [2329], [2333], [2337], [2341], [2345], [2349], [2353], [2357], [2361], [2365], [2369], [2373], [2377], [2381], [2385], [2388], [2996], [3000], [3004], [3010], [3014], [3016], [3025], [3026], [3027], [3029], [3030] [2018-11-07 15:46:59,351 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 15:46:59,351 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 15:47:00,017 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 15:47:00,020 INFO L272 AbstractInterpreter]: Visited 143 different actions 143 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 15:47:00,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:47:00,070 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 15:47:00,864 INFO L227 lantSequenceWeakener]: Weakened 291 states. On average, predicates are now at 77.59% of their original sizes. [2018-11-07 15:47:00,865 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 15:47:01,218 INFO L415 sIntCurrentIteration]: We unified 299 AI predicates to 299 [2018-11-07 15:47:01,218 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 15:47:01,219 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 15:47:01,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2018-11-07 15:47:01,220 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:47:01,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 15:47:01,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 15:47:01,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 15:47:01,221 INFO L87 Difference]: Start difference. First operand 44811 states and 55159 transitions. Second operand 7 states. [2018-11-07 15:47:11,218 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown