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/Problem13_label20_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 02:54:07,650 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 02:54:07,655 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 02:54:07,671 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 02:54:07,672 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 02:54:07,674 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 02:54:07,675 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 02:54:07,678 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 02:54:07,681 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 02:54:07,682 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 02:54:07,684 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 02:54:07,684 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 02:54:07,685 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 02:54:07,686 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 02:54:07,687 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 02:54:07,688 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 02:54:07,689 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 02:54:07,691 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 02:54:07,693 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 02:54:07,695 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 02:54:07,696 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 02:54:07,697 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 02:54:07,700 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-27 02:54:07,706 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 02:54:07,707 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 02:54:07,708 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 02:54:07,708 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 02:54:07,709 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 [2018-10-27 02:54:07,738 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 02:54:07,741 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 02:54:07,742 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 02:54:07,742 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 02:54:07,742 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 02:54:07,743 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 02:54:07,743 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 02:54:07,743 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 02:54:07,743 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 02:54:07,743 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 02:54:07,744 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 02:54:07,744 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 02:54:07,745 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 02:54:07,745 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 02:54:07,745 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 02:54:07,747 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 02:54:07,748 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 02:54:07,748 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 02:54:07,748 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 02:54:07,748 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 02:54:07,748 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 02:54:07,749 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 02:54:07,749 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 02:54:07,749 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 02:54:07,749 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 02:54:07,750 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 02:54:07,750 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 02:54:07,750 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 02:54:07,750 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 02:54:07,750 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 02:54:07,751 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 02:54:07,751 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 02:54:07,751 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 02:54:07,751 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 02:54:07,830 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 02:54:07,845 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 02:54:07,850 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 02:54:07,852 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 02:54:07,852 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 02:54:07,853 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label20_true-unreach-call.c [2018-10-27 02:54:07,927 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b8811044a/8efff389c05a4847b327deca5d7a2394/FLAGe34f8004f [2018-10-27 02:54:08,766 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 02:54:08,768 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label20_true-unreach-call.c [2018-10-27 02:54:08,808 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b8811044a/8efff389c05a4847b327deca5d7a2394/FLAGe34f8004f [2018-10-27 02:54:08,828 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b8811044a/8efff389c05a4847b327deca5d7a2394 [2018-10-27 02:54:08,842 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 02:54:08,844 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 02:54:08,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 02:54:08,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 02:54:08,850 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 02:54:08,851 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:54:08" (1/1) ... [2018-10-27 02:54:08,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fa98528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:54:08, skipping insertion in model container [2018-10-27 02:54:08,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:54:08" (1/1) ... [2018-10-27 02:54:08,868 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 02:54:09,039 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 02:54:10,587 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 02:54:10,592 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 02:54:11,373 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 02:54:11,411 INFO L193 MainTranslator]: Completed translation [2018-10-27 02:54:11,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:54:11 WrapperNode [2018-10-27 02:54:11,412 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 02:54:11,413 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 02:54:11,413 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 02:54:11,413 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 02:54:11,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:54:11" (1/1) ... [2018-10-27 02:54:11,492 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:54:11" (1/1) ... [2018-10-27 02:54:12,002 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 02:54:12,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 02:54:12,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 02:54:12,003 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 02:54:12,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:54:11" (1/1) ... [2018-10-27 02:54:12,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:54:11" (1/1) ... [2018-10-27 02:54:12,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:54:11" (1/1) ... [2018-10-27 02:54:12,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:54:11" (1/1) ... [2018-10-27 02:54:12,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:54:11" (1/1) ... [2018-10-27 02:54:12,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:54:11" (1/1) ... [2018-10-27 02:54:12,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:54:11" (1/1) ... [2018-10-27 02:54:12,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 02:54:12,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 02:54:12,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 02:54:12,384 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 02:54:12,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:54:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 02:54:12,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 02:54:12,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 02:54:12,466 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-10-27 02:54:12,466 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-10-27 02:54:12,466 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-27 02:54:12,466 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-27 02:54:12,467 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 02:54:12,467 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 02:54:12,467 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 02:54:12,467 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 02:54:12,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 02:54:12,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 02:54:12,468 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 02:54:12,469 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 02:54:24,109 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 02:54:24,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:54:24 BoogieIcfgContainer [2018-10-27 02:54:24,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 02:54:24,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 02:54:24,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 02:54:24,114 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 02:54:24,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:54:08" (1/3) ... [2018-10-27 02:54:24,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fd92fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:54:24, skipping insertion in model container [2018-10-27 02:54:24,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:54:11" (2/3) ... [2018-10-27 02:54:24,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fd92fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:54:24, skipping insertion in model container [2018-10-27 02:54:24,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:54:24" (3/3) ... [2018-10-27 02:54:24,119 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label20_true-unreach-call.c [2018-10-27 02:54:24,129 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 02:54:24,140 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 02:54:24,159 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 02:54:24,208 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 02:54:24,208 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 02:54:24,208 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 02:54:24,208 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 02:54:24,209 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 02:54:24,209 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 02:54:24,209 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 02:54:24,209 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 02:54:24,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states. [2018-10-27 02:54:24,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-27 02:54:24,263 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 02:54:24,264 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] [2018-10-27 02:54:24,267 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 02:54:24,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 02:54:24,274 INFO L82 PathProgramCache]: Analyzing trace with hash -113256892, now seen corresponding path program 1 times [2018-10-27 02:54:24,277 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 02:54:24,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:54:24,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 02:54:24,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:54:24,335 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 02:54:24,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 02:54:24,863 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-27 02:54:24,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 02:54:24,926 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 02:54:24,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 02:54:24,927 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 02:54:24,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 02:54:24,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 02:54:24,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 02:54:24,954 INFO L87 Difference]: Start difference. First operand 1120 states. Second operand 4 states. [2018-10-27 02:54:39,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 02:54:39,470 INFO L93 Difference]: Finished difference Result 3968 states and 7392 transitions. [2018-10-27 02:54:39,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 02:54:39,472 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2018-10-27 02:54:39,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 02:54:39,518 INFO L225 Difference]: With dead ends: 3968 [2018-10-27 02:54:39,519 INFO L226 Difference]: Without dead ends: 2842 [2018-10-27 02:54:39,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 02:54:39,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2018-10-27 02:54:39,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 1981. [2018-10-27 02:54:39,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1981 states. [2018-10-27 02:54:39,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 3456 transitions. [2018-10-27 02:54:39,712 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 3456 transitions. Word has length 62 [2018-10-27 02:54:39,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 02:54:39,712 INFO L481 AbstractCegarLoop]: Abstraction has 1981 states and 3456 transitions. [2018-10-27 02:54:39,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 02:54:39,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 3456 transitions. [2018-10-27 02:54:39,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-27 02:54:39,726 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 02:54:39,728 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 02:54:39,728 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 02:54:39,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 02:54:39,729 INFO L82 PathProgramCache]: Analyzing trace with hash 12905824, now seen corresponding path program 1 times [2018-10-27 02:54:39,729 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 02:54:39,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:54:39,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 02:54:39,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:54:39,731 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 02:54:39,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 02:54:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 02:54:40,103 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 02:54:40,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 02:54:40,103 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 02:54:40,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 02:54:40,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 02:54:40,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 02:54:40,108 INFO L87 Difference]: Start difference. First operand 1981 states and 3456 transitions. Second operand 5 states. [2018-10-27 02:54:53,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 02:54:53,049 INFO L93 Difference]: Finished difference Result 5673 states and 10081 transitions. [2018-10-27 02:54:53,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 02:54:53,049 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2018-10-27 02:54:53,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 02:54:53,088 INFO L225 Difference]: With dead ends: 5673 [2018-10-27 02:54:53,088 INFO L226 Difference]: Without dead ends: 3698 [2018-10-27 02:54:53,097 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-27 02:54:53,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3698 states. [2018-10-27 02:54:53,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3698 to 3687. [2018-10-27 02:54:53,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3687 states. [2018-10-27 02:54:53,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3687 states to 3687 states and 5870 transitions. [2018-10-27 02:54:53,218 INFO L78 Accepts]: Start accepts. Automaton has 3687 states and 5870 transitions. Word has length 132 [2018-10-27 02:54:53,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 02:54:53,218 INFO L481 AbstractCegarLoop]: Abstraction has 3687 states and 5870 transitions. [2018-10-27 02:54:53,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 02:54:53,219 INFO L276 IsEmpty]: Start isEmpty. Operand 3687 states and 5870 transitions. [2018-10-27 02:54:53,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-27 02:54:53,223 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 02:54:53,224 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 02:54:53,224 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 02:54:53,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 02:54:53,225 INFO L82 PathProgramCache]: Analyzing trace with hash -906091524, now seen corresponding path program 1 times [2018-10-27 02:54:53,225 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 02:54:53,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:54:53,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 02:54:53,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:54:53,226 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 02:54:53,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 02:54:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 02:54:53,377 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 02:54:53,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 02:54:53,377 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 02:54:53,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 02:54:53,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 02:54:53,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 02:54:53,379 INFO L87 Difference]: Start difference. First operand 3687 states and 5870 transitions. Second operand 5 states. [2018-10-27 02:55:11,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 02:55:11,295 INFO L93 Difference]: Finished difference Result 10963 states and 17865 transitions. [2018-10-27 02:55:11,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 02:55:11,300 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2018-10-27 02:55:11,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 02:55:11,346 INFO L225 Difference]: With dead ends: 10963 [2018-10-27 02:55:11,346 INFO L226 Difference]: Without dead ends: 7282 [2018-10-27 02:55:11,361 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 [2018-10-27 02:55:11,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7282 states. [2018-10-27 02:55:11,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7282 to 7175. [2018-10-27 02:55:11,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7175 states. [2018-10-27 02:55:11,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7175 states to 7175 states and 10520 transitions. [2018-10-27 02:55:11,583 INFO L78 Accepts]: Start accepts. Automaton has 7175 states and 10520 transitions. Word has length 134 [2018-10-27 02:55:11,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 02:55:11,583 INFO L481 AbstractCegarLoop]: Abstraction has 7175 states and 10520 transitions. [2018-10-27 02:55:11,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 02:55:11,583 INFO L276 IsEmpty]: Start isEmpty. Operand 7175 states and 10520 transitions. [2018-10-27 02:55:11,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-27 02:55:11,591 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 02:55:11,591 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 02:55:11,592 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 02:55:11,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 02:55:11,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1690050436, now seen corresponding path program 1 times [2018-10-27 02:55:11,592 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 02:55:11,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:55:11,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 02:55:11,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:55:11,594 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 02:55:11,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 02:55:11,838 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 02:55:11,839 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 02:55:11,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 02:55:11,839 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 02:55:11,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 02:55:11,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 02:55:11,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 02:55:11,842 INFO L87 Difference]: Start difference. First operand 7175 states and 10520 transitions. Second operand 3 states. [2018-10-27 02:55:18,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 02:55:18,673 INFO L93 Difference]: Finished difference Result 21003 states and 32063 transitions. [2018-10-27 02:55:18,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 02:55:18,675 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 178 [2018-10-27 02:55:18,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 02:55:18,744 INFO L225 Difference]: With dead ends: 21003 [2018-10-27 02:55:18,744 INFO L226 Difference]: Without dead ends: 13834 [2018-10-27 02:55:18,782 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 02:55:18,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13834 states. [2018-10-27 02:55:19,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13834 to 13825. [2018-10-27 02:55:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13825 states. [2018-10-27 02:55:19,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13825 states to 13825 states and 19394 transitions. [2018-10-27 02:55:19,121 INFO L78 Accepts]: Start accepts. Automaton has 13825 states and 19394 transitions. Word has length 178 [2018-10-27 02:55:19,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 02:55:19,122 INFO L481 AbstractCegarLoop]: Abstraction has 13825 states and 19394 transitions. [2018-10-27 02:55:19,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 02:55:19,122 INFO L276 IsEmpty]: Start isEmpty. Operand 13825 states and 19394 transitions. [2018-10-27 02:55:19,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-27 02:55:19,128 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 02:55:19,129 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 02:55:19,129 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 02:55:19,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 02:55:19,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1829231100, now seen corresponding path program 1 times [2018-10-27 02:55:19,130 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 02:55:19,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:55:19,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 02:55:19,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:55:19,132 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 02:55:19,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 02:55:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 02:55:19,394 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 02:55:19,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 02:55:19,395 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 02:55:19,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 02:55:19,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 02:55:19,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 02:55:19,396 INFO L87 Difference]: Start difference. First operand 13825 states and 19394 transitions. Second operand 4 states. [2018-10-27 02:55:30,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 02:55:30,814 INFO L93 Difference]: Finished difference Result 31681 states and 44253 transitions. [2018-10-27 02:55:30,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 02:55:30,820 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 183 [2018-10-27 02:55:30,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 02:55:30,879 INFO L225 Difference]: With dead ends: 31681 [2018-10-27 02:55:30,880 INFO L226 Difference]: Without dead ends: 17862 [2018-10-27 02:55:30,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 02:55:30,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17862 states. [2018-10-27 02:55:31,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17862 to 17861. [2018-10-27 02:55:31,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17861 states. [2018-10-27 02:55:31,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17861 states to 17861 states and 22138 transitions. [2018-10-27 02:55:31,268 INFO L78 Accepts]: Start accepts. Automaton has 17861 states and 22138 transitions. Word has length 183 [2018-10-27 02:55:31,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 02:55:31,269 INFO L481 AbstractCegarLoop]: Abstraction has 17861 states and 22138 transitions. [2018-10-27 02:55:31,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 02:55:31,269 INFO L276 IsEmpty]: Start isEmpty. Operand 17861 states and 22138 transitions. [2018-10-27 02:55:31,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-10-27 02:55:31,277 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 02:55:31,278 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, 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] [2018-10-27 02:55:31,278 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 02:55:31,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 02:55:31,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1374780002, now seen corresponding path program 1 times [2018-10-27 02:55:31,278 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 02:55:31,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:55:31,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 02:55:31,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:55:31,280 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 02:55:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 02:55:31,618 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 02:55:31,997 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 178 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 02:55:31,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 02:55:31,997 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 02:55:31,998 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 254 with the following transitions: [2018-10-27 02:55:32,001 INFO L202 CegarAbsIntRunner]: [0], [1], [2628], [2635], [2643], [2651], [2659], [2667], [2675], [2683], [2691], [2699], [2707], [2715], [2723], [2731], [2739], [2747], [2755], [2763], [2771], [2779], [2787], [2795], [2803], [2811], [2819], [2827], [2835], [2843], [2851], [2859], [2867], [2875], [2883], [2891], [2899], [2907], [2915], [2923], [2931], [2939], [2947], [2955], [2963], [2971], [2979], [2987], [2995], [3003], [3011], [3019], [3023], [3025], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3120], [3121], [3125], [3129], [3133], [3137], [3148], [3152], [3156], [3160], [3164], [3168], [3179], [3183], [3187], [3191], [3195], [3199], [3203], [3207], [3218], [3222], [3226], [3230], [3234], [3238], [3242], [3246], [3250], [3254], [3258], [3262], [3266], [3270], [3274], [3278], [3282], [3286], [3290], [3294], [3305], [3309], [3313], [3317], [3321], [3325], [3329], [3333], [3344], [3355], [3358], [3361], [3365], [4238], [4242], [4246], [4252], [4256], [4258], [4269], [4270], [4271], [4273], [4274] [2018-10-27 02:55:32,084 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 02:55:32,085 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 02:55:34,529 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 02:55:39,526 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 02:55:39,528 INFO L272 AbstractInterpreter]: Visited 124 different actions 124 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-10-27 02:55:39,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 02:55:39,541 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 02:55:45,183 INFO L227 lantSequenceWeakener]: Weakened 230 states. On average, predicates are now at 71.85% of their original sizes. [2018-10-27 02:55:45,183 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 02:55:46,730 INFO L415 sIntCurrentIteration]: We unified 252 AI predicates to 252 [2018-10-27 02:55:46,731 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 02:55:46,732 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 02:55:46,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2018-10-27 02:55:46,732 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 02:55:46,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-27 02:55:46,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-27 02:55:46,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-10-27 02:55:46,733 INFO L87 Difference]: Start difference. First operand 17861 states and 22138 transitions. Second operand 11 states. Received shutdown request... [2018-10-27 02:57:50,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-27 02:57:50,656 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-27 02:57:50,663 WARN L205 ceAbstractionStarter]: Timeout [2018-10-27 02:57:50,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 02:57:50 BoogieIcfgContainer [2018-10-27 02:57:50,663 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 02:57:50,664 INFO L168 Benchmark]: Toolchain (without parser) took 221821.00 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.7 GB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -551.1 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. [2018-10-27 02:57:50,666 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 02:57:50,666 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2566.64 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 253.7 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB. [2018-10-27 02:57:50,667 INFO L168 Benchmark]: Boogie Procedure Inliner took 590.03 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 801.6 MB). Free memory was 1.1 GB in the beginning and 2.2 GB in the end (delta: -1.1 GB). Peak memory consumption was 83.7 MB. Max. memory is 7.1 GB. [2018-10-27 02:57:50,668 INFO L168 Benchmark]: Boogie Preprocessor took 380.46 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 37.6 MB). Peak memory consumption was 37.6 MB. Max. memory is 7.1 GB. [2018-10-27 02:57:50,669 INFO L168 Benchmark]: RCFGBuilder took 11726.39 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 192.9 MB). Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 8.2 MB). Peak memory consumption was 671.4 MB. Max. memory is 7.1 GB. [2018-10-27 02:57:50,670 INFO L168 Benchmark]: TraceAbstraction took 206552.11 ms. Allocated memory was 2.5 GB in the beginning and 4.2 GB in the end (delta: 1.7 GB). Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 224.1 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-10-27 02:57:50,676 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2566.64 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 253.7 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 590.03 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 801.6 MB). Free memory was 1.1 GB in the beginning and 2.2 GB in the end (delta: -1.1 GB). Peak memory consumption was 83.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 380.46 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 37.6 MB). Peak memory consumption was 37.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 11726.39 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 192.9 MB). Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 8.2 MB). Peak memory consumption was 671.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 206552.11 ms. Allocated memory was 2.5 GB in the beginning and 4.2 GB in the end (delta: 1.7 GB). Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 224.1 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 177]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 177). Cancelled while BasicCegarLoop was constructing difference of abstraction (17861states) and FLOYD_HOARE automaton (currently 10 states, 11 states before enhancement),while ReachableStatesComputation was computing reachable states (4375 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 1120 locations, 1 error locations. TIMEOUT Result, 206.4s OverallTime, 6 OverallIterations, 3 TraceHistogramMax, 187.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 5099 SDtfs, 12887 SDslu, 2559 SDs, 0 SdLazy, 23563 SolverSat, 5377 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 135.8s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 289 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17861occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 7.5s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 0.9963125763125763 AbsIntWeakeningRatio, 0.11904761904761904 AbsIntAvgWeakeningVarsNumRemoved, 27.13888888888889 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 989 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 942 NumberOfCodeBlocks, 942 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 936 ConstructedInterpolants, 0 QuantifiedInterpolants, 380444 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 5 PerfectInterpolantSequences, 398/400 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown