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.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label19_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-24 01:34:04,643 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 01:34:04,645 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 01:34:04,658 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 01:34:04,658 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 01:34:04,659 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 01:34:04,661 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 01:34:04,663 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 01:34:04,666 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 01:34:04,666 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 01:34:04,669 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 01:34:04,670 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 01:34:04,671 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 01:34:04,672 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 01:34:04,673 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 01:34:04,674 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 01:34:04,674 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 01:34:04,676 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 01:34:04,678 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 01:34:04,680 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 01:34:04,681 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 01:34:04,682 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 01:34:04,685 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 01:34:04,693 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-24 01:34:04,708 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 01:34:04,709 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 01:34:04,709 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 01:34:04,710 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 01:34:04,710 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 01:34:04,710 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 01:34:04,710 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 01:34:04,710 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 01:34:04,711 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 01:34:04,711 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 01:34:04,711 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 01:34:04,711 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 01:34:04,712 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 01:34:04,712 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 01:34:04,712 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 01:34:04,712 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 01:34:04,713 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 01:34:04,713 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 01:34:04,713 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 01:34:04,713 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 01:34:04,714 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 01:34:04,714 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 01:34:04,714 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 01:34:04,714 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 01:34:04,714 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 01:34:04,715 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 01:34:04,715 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 01:34:04,715 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 01:34:04,715 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 01:34:04,715 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 01:34:04,716 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 01:34:04,716 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 01:34:04,716 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 01:34:04,716 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 01:34:04,761 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 01:34:04,777 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 01:34:04,780 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 01:34:04,782 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 01:34:04,783 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 01:34:04,784 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label19_true-unreach-call_false-termination.c [2018-10-24 01:34:04,854 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/30429563b/999d5939e3cd4770854b9b6461db6c93/FLAG6f6fb6fe7 [2018-10-24 01:34:05,468 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 01:34:05,469 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label19_true-unreach-call_false-termination.c [2018-10-24 01:34:05,493 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/30429563b/999d5939e3cd4770854b9b6461db6c93/FLAG6f6fb6fe7 [2018-10-24 01:34:05,516 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/30429563b/999d5939e3cd4770854b9b6461db6c93 [2018-10-24 01:34:05,531 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 01:34:05,533 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 01:34:05,537 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 01:34:05,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 01:34:05,542 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 01:34:05,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 01:34:05" (1/1) ... [2018-10-24 01:34:05,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b49186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:34:05, skipping insertion in model container [2018-10-24 01:34:05,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 01:34:05" (1/1) ... [2018-10-24 01:34:05,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 01:34:05,641 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 01:34:06,178 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 01:34:06,184 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 01:34:06,349 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 01:34:06,367 INFO L193 MainTranslator]: Completed translation [2018-10-24 01:34:06,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:34:06 WrapperNode [2018-10-24 01:34:06,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 01:34:06,374 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 01:34:06,374 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 01:34:06,375 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 01:34:06,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:34:06" (1/1) ... [2018-10-24 01:34:06,411 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:34:06" (1/1) ... [2018-10-24 01:34:06,626 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 01:34:06,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 01:34:06,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 01:34:06,627 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 01:34:06,638 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:34:06" (1/1) ... [2018-10-24 01:34:06,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:34:06" (1/1) ... [2018-10-24 01:34:06,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:34:06" (1/1) ... [2018-10-24 01:34:06,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:34:06" (1/1) ... [2018-10-24 01:34:06,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:34:06" (1/1) ... [2018-10-24 01:34:06,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:34:06" (1/1) ... [2018-10-24 01:34:06,748 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:34:06" (1/1) ... [2018-10-24 01:34:06,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 01:34:06,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 01:34:06,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 01:34:06,767 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 01:34:06,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:34:06" (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 [2018-10-24 01:34:06,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 01:34:06,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 01:34:06,842 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-24 01:34:06,842 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-24 01:34:06,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 01:34:06,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 01:34:06,842 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 01:34:06,843 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 01:34:10,446 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 01:34:10,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 01:34:10 BoogieIcfgContainer [2018-10-24 01:34:10,447 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 01:34:10,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 01:34:10,448 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 01:34:10,452 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 01:34:10,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 01:34:05" (1/3) ... [2018-10-24 01:34:10,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739b8486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 01:34:10, skipping insertion in model container [2018-10-24 01:34:10,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:34:06" (2/3) ... [2018-10-24 01:34:10,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739b8486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 01:34:10, skipping insertion in model container [2018-10-24 01:34:10,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 01:34:10" (3/3) ... [2018-10-24 01:34:10,456 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label19_true-unreach-call_false-termination.c [2018-10-24 01:34:10,466 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 01:34:10,475 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 01:34:10,493 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 01:34:10,532 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 01:34:10,532 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 01:34:10,532 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 01:34:10,532 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 01:34:10,532 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 01:34:10,533 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 01:34:10,533 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 01:34:10,533 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 01:34:10,560 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-10-24 01:34:10,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-24 01:34:10,571 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 01:34:10,572 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 01:34:10,575 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 01:34:10,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 01:34:10,582 INFO L82 PathProgramCache]: Analyzing trace with hash -949219895, now seen corresponding path program 1 times [2018-10-24 01:34:10,585 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 01:34:10,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:34:10,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 01:34:10,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:34:10,644 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 01:34:10,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 01:34:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 01:34:11,171 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 01:34:11,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 01:34:11,171 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 01:34:11,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 01:34:11,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 01:34:11,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 01:34:11,197 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-10-24 01:34:13,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 01:34:13,185 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-10-24 01:34:13,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 01:34:13,188 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2018-10-24 01:34:13,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 01:34:13,213 INFO L225 Difference]: With dead ends: 691 [2018-10-24 01:34:13,213 INFO L226 Difference]: Without dead ends: 434 [2018-10-24 01:34:13,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 01:34:13,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-10-24 01:34:13,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-10-24 01:34:13,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-10-24 01:34:13,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 772 transitions. [2018-10-24 01:34:13,308 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 772 transitions. Word has length 69 [2018-10-24 01:34:13,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 01:34:13,309 INFO L481 AbstractCegarLoop]: Abstraction has 434 states and 772 transitions. [2018-10-24 01:34:13,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 01:34:13,309 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 772 transitions. [2018-10-24 01:34:13,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-24 01:34:13,318 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 01:34:13,319 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 01:34:13,319 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 01:34:13,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 01:34:13,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1252535900, now seen corresponding path program 1 times [2018-10-24 01:34:13,323 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 01:34:13,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:34:13,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 01:34:13,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:34:13,325 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 01:34:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 01:34:13,706 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 01:34:13,706 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 01:34:13,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 01:34:13,706 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 01:34:13,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 01:34:13,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 01:34:13,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 01:34:13,710 INFO L87 Difference]: Start difference. First operand 434 states and 772 transitions. Second operand 6 states. [2018-10-24 01:34:17,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 01:34:17,497 INFO L93 Difference]: Finished difference Result 1234 states and 2250 transitions. [2018-10-24 01:34:17,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 01:34:17,504 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 139 [2018-10-24 01:34:17,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 01:34:17,515 INFO L225 Difference]: With dead ends: 1234 [2018-10-24 01:34:17,515 INFO L226 Difference]: Without dead ends: 806 [2018-10-24 01:34:17,519 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 [2018-10-24 01:34:17,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2018-10-24 01:34:17,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 797. [2018-10-24 01:34:17,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 797 states. [2018-10-24 01:34:17,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 1300 transitions. [2018-10-24 01:34:17,580 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 1300 transitions. Word has length 139 [2018-10-24 01:34:17,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 01:34:17,581 INFO L481 AbstractCegarLoop]: Abstraction has 797 states and 1300 transitions. [2018-10-24 01:34:17,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 01:34:17,581 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 1300 transitions. [2018-10-24 01:34:17,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-24 01:34:17,586 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 01:34:17,586 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 01:34:17,587 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 01:34:17,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 01:34:17,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1412263263, now seen corresponding path program 1 times [2018-10-24 01:34:17,587 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 01:34:17,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:34:17,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 01:34:17,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:34:17,589 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 01:34:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 01:34:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 01:34:17,812 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 01:34:17,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 01:34:17,812 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 01:34:17,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 01:34:17,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 01:34:17,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 01:34:17,814 INFO L87 Difference]: Start difference. First operand 797 states and 1300 transitions. Second operand 5 states. [2018-10-24 01:34:20,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 01:34:20,289 INFO L93 Difference]: Finished difference Result 2186 states and 3741 transitions. [2018-10-24 01:34:20,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 01:34:20,296 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 140 [2018-10-24 01:34:20,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 01:34:20,310 INFO L225 Difference]: With dead ends: 2186 [2018-10-24 01:34:20,311 INFO L226 Difference]: Without dead ends: 1395 [2018-10-24 01:34:20,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-24 01:34:20,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2018-10-24 01:34:20,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1369. [2018-10-24 01:34:20,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1369 states. [2018-10-24 01:34:20,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2191 transitions. [2018-10-24 01:34:20,391 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2191 transitions. Word has length 140 [2018-10-24 01:34:20,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 01:34:20,392 INFO L481 AbstractCegarLoop]: Abstraction has 1369 states and 2191 transitions. [2018-10-24 01:34:20,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 01:34:20,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2191 transitions. [2018-10-24 01:34:20,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-24 01:34:20,396 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 01:34:20,396 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 01:34:20,396 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 01:34:20,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 01:34:20,397 INFO L82 PathProgramCache]: Analyzing trace with hash 531411331, now seen corresponding path program 1 times [2018-10-24 01:34:20,397 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 01:34:20,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:34:20,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 01:34:20,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:34:20,399 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 01:34:20,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 01:34:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 01:34:20,557 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 01:34:20,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 01:34:20,557 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 01:34:20,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 01:34:20,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 01:34:20,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 01:34:20,559 INFO L87 Difference]: Start difference. First operand 1369 states and 2191 transitions. Second operand 5 states. [2018-10-24 01:34:24,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 01:34:24,222 INFO L93 Difference]: Finished difference Result 4059 states and 6474 transitions. [2018-10-24 01:34:24,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 01:34:24,225 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2018-10-24 01:34:24,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 01:34:24,246 INFO L225 Difference]: With dead ends: 4059 [2018-10-24 01:34:24,246 INFO L226 Difference]: Without dead ends: 2696 [2018-10-24 01:34:24,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-24 01:34:24,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2018-10-24 01:34:24,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2603. [2018-10-24 01:34:24,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2603 states. [2018-10-24 01:34:24,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 3729 transitions. [2018-10-24 01:34:24,358 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 3729 transitions. Word has length 142 [2018-10-24 01:34:24,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 01:34:24,359 INFO L481 AbstractCegarLoop]: Abstraction has 2603 states and 3729 transitions. [2018-10-24 01:34:24,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 01:34:24,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 3729 transitions. [2018-10-24 01:34:24,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-24 01:34:24,363 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 01:34:24,363 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 01:34:24,363 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 01:34:24,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 01:34:24,364 INFO L82 PathProgramCache]: Analyzing trace with hash -2121902484, now seen corresponding path program 1 times [2018-10-24 01:34:24,364 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 01:34:24,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:34:24,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 01:34:24,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:34:24,365 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 01:34:24,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 01:34:24,801 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-24 01:34:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 01:34:24,928 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 01:34:24,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 01:34:24,928 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 01:34:24,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 01:34:24,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 01:34:24,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-24 01:34:24,930 INFO L87 Difference]: Start difference. First operand 2603 states and 3729 transitions. Second operand 5 states. [2018-10-24 01:34:28,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 01:34:28,534 INFO L93 Difference]: Finished difference Result 6795 states and 10054 transitions. [2018-10-24 01:34:28,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 01:34:28,535 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2018-10-24 01:34:28,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 01:34:28,556 INFO L225 Difference]: With dead ends: 6795 [2018-10-24 01:34:28,556 INFO L226 Difference]: Without dead ends: 3293 [2018-10-24 01:34:28,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-24 01:34:28,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3293 states. [2018-10-24 01:34:28,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3293 to 3278. [2018-10-24 01:34:28,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3278 states. [2018-10-24 01:34:28,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 4140 transitions. [2018-10-24 01:34:28,664 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 4140 transitions. Word has length 143 [2018-10-24 01:34:28,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 01:34:28,664 INFO L481 AbstractCegarLoop]: Abstraction has 3278 states and 4140 transitions. [2018-10-24 01:34:28,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 01:34:28,664 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 4140 transitions. [2018-10-24 01:34:28,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-10-24 01:34:28,673 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 01:34:28,673 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 01:34:28,674 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 01:34:28,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 01:34:28,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1248172171, now seen corresponding path program 1 times [2018-10-24 01:34:28,674 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 01:34:28,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:34:28,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 01:34:28,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:34:28,676 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 01:34:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 01:34:28,870 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 01:34:28,870 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 01:34:28,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 01:34:28,871 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 01:34:28,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 01:34:28,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 01:34:28,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 01:34:28,872 INFO L87 Difference]: Start difference. First operand 3278 states and 4140 transitions. Second operand 4 states. [2018-10-24 01:34:31,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 01:34:31,356 INFO L93 Difference]: Finished difference Result 6733 states and 8492 transitions. [2018-10-24 01:34:31,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 01:34:31,359 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 242 [2018-10-24 01:34:31,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 01:34:31,375 INFO L225 Difference]: With dead ends: 6733 [2018-10-24 01:34:31,376 INFO L226 Difference]: Without dead ends: 3461 [2018-10-24 01:34:31,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 01:34:31,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3461 states. [2018-10-24 01:34:31,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3461 to 3461. [2018-10-24 01:34:31,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3461 states. [2018-10-24 01:34:31,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3461 states to 3461 states and 4335 transitions. [2018-10-24 01:34:31,466 INFO L78 Accepts]: Start accepts. Automaton has 3461 states and 4335 transitions. Word has length 242 [2018-10-24 01:34:31,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 01:34:31,466 INFO L481 AbstractCegarLoop]: Abstraction has 3461 states and 4335 transitions. [2018-10-24 01:34:31,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 01:34:31,467 INFO L276 IsEmpty]: Start isEmpty. Operand 3461 states and 4335 transitions. [2018-10-24 01:34:31,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2018-10-24 01:34:31,479 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 01:34:31,479 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 01:34:31,480 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 01:34:31,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 01:34:31,480 INFO L82 PathProgramCache]: Analyzing trace with hash -2039548178, now seen corresponding path program 1 times [2018-10-24 01:34:31,480 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 01:34:31,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:34:31,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 01:34:31,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:34:31,481 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 01:34:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 01:34:32,101 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-10-24 01:34:32,380 WARN L179 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2018-10-24 01:34:32,529 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2018-10-24 01:34:33,030 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 224 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 01:34:33,030 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 01:34:33,030 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 01:34:33,031 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 285 with the following transitions: [2018-10-24 01:34:33,033 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [453], [455], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [622], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-24 01:34:33,101 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 01:34:33,102 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 01:34:35,520 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 01:34:37,807 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 01:34:37,810 INFO L272 AbstractInterpreter]: Visited 118 different actions 118 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-10-24 01:34:37,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 01:34:37,853 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 01:34:40,958 INFO L232 lantSequenceWeakener]: Weakened 276 states. On average, predicates are now at 78.18% of their original sizes. [2018-10-24 01:34:40,958 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 01:34:41,251 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 01:34:41,252 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 01:34:41,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2018-10-24 01:34:41,253 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 01:34:41,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 01:34:41,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 01:34:41,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-24 01:34:41,254 INFO L87 Difference]: Start difference. First operand 3461 states and 4335 transitions. Second operand 7 states. [2018-10-24 01:35:05,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 01:35:05,173 INFO L93 Difference]: Finished difference Result 7101 states and 8875 transitions. [2018-10-24 01:35:05,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 01:35:05,173 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 284 [2018-10-24 01:35:05,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 01:35:05,188 INFO L225 Difference]: With dead ends: 7101 [2018-10-24 01:35:05,188 INFO L226 Difference]: Without dead ends: 3646 [2018-10-24 01:35:05,200 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 284 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-10-24 01:35:05,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3646 states. [2018-10-24 01:35:05,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3646 to 3644. [2018-10-24 01:35:05,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3644 states. [2018-10-24 01:35:05,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3644 states to 3644 states and 4520 transitions. [2018-10-24 01:35:05,288 INFO L78 Accepts]: Start accepts. Automaton has 3644 states and 4520 transitions. Word has length 284 [2018-10-24 01:35:05,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 01:35:05,288 INFO L481 AbstractCegarLoop]: Abstraction has 3644 states and 4520 transitions. [2018-10-24 01:35:05,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 01:35:05,288 INFO L276 IsEmpty]: Start isEmpty. Operand 3644 states and 4520 transitions. [2018-10-24 01:35:05,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2018-10-24 01:35:05,305 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 01:35:05,306 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 01:35:05,306 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 01:35:05,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 01:35:05,307 INFO L82 PathProgramCache]: Analyzing trace with hash -806219320, now seen corresponding path program 1 times [2018-10-24 01:35:05,307 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 01:35:05,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:35:05,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 01:35:05,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:35:05,308 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 01:35:05,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 01:35:05,843 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-24 01:35:06,655 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 199 proven. 297 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-24 01:35:06,655 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 01:35:06,655 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 01:35:06,656 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 396 with the following transitions: [2018-10-24 01:35:06,656 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [453], [455], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [622], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-24 01:35:06,666 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 01:35:06,666 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 01:35:08,326 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 01:35:14,408 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 01:35:14,408 INFO L272 AbstractInterpreter]: Visited 122 different actions 238 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-24 01:35:14,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 01:35:14,418 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 01:35:19,612 INFO L232 lantSequenceWeakener]: Weakened 263 states. On average, predicates are now at 78.33% of their original sizes. [2018-10-24 01:35:19,613 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 01:35:27,167 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 01:35:27,168 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 01:35:27,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [15] total 30 [2018-10-24 01:35:27,168 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 01:35:27,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-24 01:35:27,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-24 01:35:27,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2018-10-24 01:35:27,170 INFO L87 Difference]: Start difference. First operand 3644 states and 4520 transitions. Second operand 17 states. [2018-10-24 01:37:22,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 01:37:22,584 INFO L93 Difference]: Finished difference Result 7477 states and 9281 transitions. [2018-10-24 01:37:22,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-24 01:37:22,585 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 395 [2018-10-24 01:37:22,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 01:37:22,599 INFO L225 Difference]: With dead ends: 7477 [2018-10-24 01:37:22,600 INFO L226 Difference]: Without dead ends: 4022 [2018-10-24 01:37:22,611 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 403 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2018-10-24 01:37:22,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4022 states. [2018-10-24 01:37:22,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4022 to 4012. [2018-10-24 01:37:22,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4012 states. [2018-10-24 01:37:22,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4012 states to 4012 states and 4894 transitions. [2018-10-24 01:37:22,810 INFO L78 Accepts]: Start accepts. Automaton has 4012 states and 4894 transitions. Word has length 395 [2018-10-24 01:37:22,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 01:37:22,811 INFO L481 AbstractCegarLoop]: Abstraction has 4012 states and 4894 transitions. [2018-10-24 01:37:22,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-24 01:37:22,811 INFO L276 IsEmpty]: Start isEmpty. Operand 4012 states and 4894 transitions. [2018-10-24 01:37:22,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2018-10-24 01:37:22,835 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 01:37:22,836 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 01:37:22,836 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 01:37:22,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 01:37:22,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1783785411, now seen corresponding path program 1 times [2018-10-24 01:37:22,837 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 01:37:22,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:37:22,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 01:37:22,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:37:22,839 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 01:37:22,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 01:37:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 558 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-10-24 01:37:24,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 01:37:24,238 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 01:37:24,238 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 506 with the following transitions: [2018-10-24 01:37:24,238 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [453], [455], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [622], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-24 01:37:24,245 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 01:37:24,245 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 01:37:25,851 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... [2018-10-24 01:38:01,412 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 01:38:01,412 INFO L272 AbstractInterpreter]: Visited 123 different actions 481 times. Merged at 7 different actions 22 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 24 variables. [2018-10-24 01:38:01,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 01:38:01,420 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates Cannot interrupt operation gracefully because timeout expired. Forcing shutdown