java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label42_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 19:06:26,653 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 19:06:26,655 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 19:06:26,673 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 19:06:26,674 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 19:06:26,675 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 19:06:26,676 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 19:06:26,678 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 19:06:26,680 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 19:06:26,681 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 19:06:26,682 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 19:06:26,682 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 19:06:26,683 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 19:06:26,684 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 19:06:26,685 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 19:06:26,686 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 19:06:26,687 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 19:06:26,689 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 19:06:26,691 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 19:06:26,692 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 19:06:26,694 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 19:06:26,697 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 19:06:26,699 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 19:06:26,702 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 19:06:26,702 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 19:06:26,703 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 19:06:26,704 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 19:06:26,707 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 19:06:26,707 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 19:06:26,709 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 19:06:26,711 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 19:06:26,712 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-12 19:06:26,716 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-12 19:06:26,744 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 19:06:26,744 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 19:06:26,745 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 19:06:26,745 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 19:06:26,746 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 19:06:26,747 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 19:06:26,747 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 19:06:26,747 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 19:06:26,747 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 19:06:26,747 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 19:06:26,748 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 19:06:26,748 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 19:06:26,748 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 19:06:26,749 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 19:06:26,749 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 19:06:26,750 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 19:06:26,750 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 19:06:26,750 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 19:06:26,750 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 19:06:26,750 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 19:06:26,752 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 19:06:26,752 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 19:06:26,753 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 19:06:26,753 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 19:06:26,753 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 19:06:26,753 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 19:06:26,754 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 19:06:26,754 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 19:06:26,754 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 19:06:26,754 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 19:06:26,754 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 19:06:26,754 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 19:06:26,755 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 19:06:26,755 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 19:06:26,755 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 19:06:26,816 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 19:06:26,833 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 19:06:26,837 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 19:06:26,839 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 19:06:26,839 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 19:06:26,840 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label42_true-unreach-call_false-termination.c [2018-11-12 19:06:26,902 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaff50234/4edbc7dff15346e1b5c628d3ac825880/FLAGd58ea73c2 [2018-11-12 19:06:27,535 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 19:06:27,536 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label42_true-unreach-call_false-termination.c [2018-11-12 19:06:27,559 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaff50234/4edbc7dff15346e1b5c628d3ac825880/FLAGd58ea73c2 [2018-11-12 19:06:27,576 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaff50234/4edbc7dff15346e1b5c628d3ac825880 [2018-11-12 19:06:27,587 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 19:06:27,589 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 19:06:27,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 19:06:27,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 19:06:27,593 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 19:06:27,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 07:06:27" (1/1) ... [2018-11-12 19:06:27,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7868ad02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:06:27, skipping insertion in model container [2018-11-12 19:06:27,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 07:06:27" (1/1) ... [2018-11-12 19:06:27,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 19:06:27,691 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 19:06:28,362 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 19:06:28,367 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 19:06:28,547 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 19:06:28,567 INFO L193 MainTranslator]: Completed translation [2018-11-12 19:06:28,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:06:28 WrapperNode [2018-11-12 19:06:28,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 19:06:28,569 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 19:06:28,569 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 19:06:28,569 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 19:06:28,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:06:28" (1/1) ... [2018-11-12 19:06:28,699 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:06:28" (1/1) ... [2018-11-12 19:06:28,707 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 19:06:28,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 19:06:28,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 19:06:28,707 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 19:06:28,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:06:28" (1/1) ... [2018-11-12 19:06:28,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:06:28" (1/1) ... [2018-11-12 19:06:28,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:06:28" (1/1) ... [2018-11-12 19:06:28,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:06:28" (1/1) ... [2018-11-12 19:06:28,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:06:28" (1/1) ... [2018-11-12 19:06:28,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:06:28" (1/1) ... [2018-11-12 19:06:28,816 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:06:28" (1/1) ... [2018-11-12 19:06:28,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 19:06:28,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 19:06:28,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 19:06:28,832 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 19:06:28,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:06:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 19:06:28,905 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 19:06:28,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 19:06:28,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 19:06:28,907 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 19:06:28,907 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 19:06:28,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 19:06:28,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 19:06:28,908 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 19:06:28,908 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 19:06:32,442 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 19:06:32,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 07:06:32 BoogieIcfgContainer [2018-11-12 19:06:32,443 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 19:06:32,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 19:06:32,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 19:06:32,448 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 19:06:32,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 07:06:27" (1/3) ... [2018-11-12 19:06:32,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a3c9890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 07:06:32, skipping insertion in model container [2018-11-12 19:06:32,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:06:28" (2/3) ... [2018-11-12 19:06:32,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a3c9890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 07:06:32, skipping insertion in model container [2018-11-12 19:06:32,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 07:06:32" (3/3) ... [2018-11-12 19:06:32,452 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label42_true-unreach-call_false-termination.c [2018-11-12 19:06:32,462 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 19:06:32,472 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 19:06:32,491 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 19:06:32,527 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 19:06:32,528 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 19:06:32,528 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 19:06:32,528 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 19:06:32,528 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 19:06:32,528 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 19:06:32,528 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 19:06:32,529 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 19:06:32,559 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-12 19:06:32,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-12 19:06:32,573 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:06:32,574 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] [2018-11-12 19:06:32,576 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:06:32,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:06:32,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1589650361, now seen corresponding path program 1 times [2018-11-12 19:06:32,585 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:06:32,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:06:32,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:06:32,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:06:32,644 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:06:32,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:06:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:06:33,097 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:06:33,097 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 19:06:33,098 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:06:33,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 19:06:33,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 19:06:33,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 19:06:33,124 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-11-12 19:06:34,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:06:34,824 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-11-12 19:06:34,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 19:06:34,828 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 49 [2018-11-12 19:06:34,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:06:34,848 INFO L225 Difference]: With dead ends: 691 [2018-11-12 19:06:34,848 INFO L226 Difference]: Without dead ends: 434 [2018-11-12 19:06:34,857 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 19:06:34,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-11-12 19:06:34,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-11-12 19:06:34,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-11-12 19:06:34,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-11-12 19:06:34,945 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 49 [2018-11-12 19:06:34,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:06:34,945 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-11-12 19:06:34,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 19:06:34,946 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-11-12 19:06:34,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-11-12 19:06:34,954 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:06:34,954 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:06:34,955 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:06:34,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:06:34,955 INFO L82 PathProgramCache]: Analyzing trace with hash 192752175, now seen corresponding path program 1 times [2018-11-12 19:06:34,955 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:06:34,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:06:34,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:06:34,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:06:34,957 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:06:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:06:35,315 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:06:35,316 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:06:35,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 19:06:35,316 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:06:35,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 19:06:35,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 19:06:35,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 19:06:35,319 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-11-12 19:06:37,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:06:37,310 INFO L93 Difference]: Finished difference Result 1062 states and 1897 transitions. [2018-11-12 19:06:37,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 19:06:37,311 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2018-11-12 19:06:37,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:06:37,318 INFO L225 Difference]: With dead ends: 1062 [2018-11-12 19:06:37,318 INFO L226 Difference]: Without dead ends: 634 [2018-11-12 19:06:37,321 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-12 19:06:37,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2018-11-12 19:06:37,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 625. [2018-11-12 19:06:37,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2018-11-12 19:06:37,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1019 transitions. [2018-11-12 19:06:37,364 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1019 transitions. Word has length 136 [2018-11-12 19:06:37,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:06:37,365 INFO L480 AbstractCegarLoop]: Abstraction has 625 states and 1019 transitions. [2018-11-12 19:06:37,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 19:06:37,365 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1019 transitions. [2018-11-12 19:06:37,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-11-12 19:06:37,370 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:06:37,370 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:06:37,370 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:06:37,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:06:37,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1678139032, now seen corresponding path program 1 times [2018-11-12 19:06:37,371 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:06:37,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:06:37,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:06:37,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:06:37,373 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:06:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:06:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:06:37,539 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:06:37,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 19:06:37,539 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:06:37,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 19:06:37,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 19:06:37,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 19:06:37,541 INFO L87 Difference]: Start difference. First operand 625 states and 1019 transitions. Second operand 4 states. [2018-11-12 19:06:41,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:06:41,165 INFO L93 Difference]: Finished difference Result 2352 states and 4016 transitions. [2018-11-12 19:06:41,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 19:06:41,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2018-11-12 19:06:41,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:06:41,180 INFO L225 Difference]: With dead ends: 2352 [2018-11-12 19:06:41,180 INFO L226 Difference]: Without dead ends: 1733 [2018-11-12 19:06:41,186 INFO L604 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 [2018-11-12 19:06:41,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2018-11-12 19:06:41,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1733. [2018-11-12 19:06:41,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1733 states. [2018-11-12 19:06:41,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 2647 transitions. [2018-11-12 19:06:41,251 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 2647 transitions. Word has length 145 [2018-11-12 19:06:41,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:06:41,252 INFO L480 AbstractCegarLoop]: Abstraction has 1733 states and 2647 transitions. [2018-11-12 19:06:41,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 19:06:41,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 2647 transitions. [2018-11-12 19:06:41,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-11-12 19:06:41,270 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:06:41,270 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:06:41,270 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:06:41,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:06:41,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1304221998, now seen corresponding path program 1 times [2018-11-12 19:06:41,271 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:06:41,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:06:41,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:06:41,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:06:41,273 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:06:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:06:41,905 WARN L179 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-11-12 19:06:42,258 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-12 19:06:42,717 WARN L179 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2018-11-12 19:06:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 84 proven. 107 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:06:42,823 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:06:42,824 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:06:42,825 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 275 with the following transitions: [2018-11-12 19:06:42,830 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], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [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], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:06:42,896 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:06:42,897 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:06:43,629 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:06:43,644 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:06:43,646 INFO L272 AbstractInterpreter]: Visited 118 different actions 118 times. Never merged. Never widened. Performed 1030 root evaluator evaluations with a maximum evaluation depth of 6. Performed 1030 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 24 variables. [2018-11-12 19:06:43,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:06:43,690 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:06:44,385 INFO L227 lantSequenceWeakener]: Weakened 265 states. On average, predicates are now at 77.79% of their original sizes. [2018-11-12 19:06:44,385 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:06:44,629 INFO L415 sIntCurrentIteration]: We unified 273 AI predicates to 273 [2018-11-12 19:06:44,629 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:06:44,630 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:06:44,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2018-11-12 19:06:44,630 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:06:44,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 19:06:44,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 19:06:44,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 19:06:44,632 INFO L87 Difference]: Start difference. First operand 1733 states and 2647 transitions. Second operand 7 states. [2018-11-12 19:07:00,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:07:00,612 INFO L93 Difference]: Finished difference Result 3645 states and 5568 transitions. [2018-11-12 19:07:00,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 19:07:00,612 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 274 [2018-11-12 19:07:00,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:07:00,626 INFO L225 Difference]: With dead ends: 3645 [2018-11-12 19:07:00,626 INFO L226 Difference]: Without dead ends: 1918 [2018-11-12 19:07:00,636 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 274 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-12 19:07:00,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2018-11-12 19:07:00,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1916. [2018-11-12 19:07:00,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1916 states. [2018-11-12 19:07:00,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2838 transitions. [2018-11-12 19:07:00,694 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2838 transitions. Word has length 274 [2018-11-12 19:07:00,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:07:00,694 INFO L480 AbstractCegarLoop]: Abstraction has 1916 states and 2838 transitions. [2018-11-12 19:07:00,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 19:07:00,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2838 transitions. [2018-11-12 19:07:00,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2018-11-12 19:07:00,708 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:07:00,708 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:07:00,709 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:07:00,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:07:00,709 INFO L82 PathProgramCache]: Analyzing trace with hash -111433536, now seen corresponding path program 1 times [2018-11-12 19:07:00,710 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:07:00,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:07:00,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:07:00,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:07:00,711 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:07:00,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:07:01,213 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:07:01,719 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 214 proven. 189 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:07:01,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:07:01,719 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:07:01,719 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 360 with the following transitions: [2018-11-12 19:07:01,720 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], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:07:01,725 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:07:01,725 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:07:01,895 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:07:02,303 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:07:02,303 INFO L272 AbstractInterpreter]: Visited 122 different actions 237 times. Merged at 4 different actions 4 times. Never widened. Performed 2402 root evaluator evaluations with a maximum evaluation depth of 6. Performed 2402 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:07:02,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:07:02,333 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:07:03,094 INFO L227 lantSequenceWeakener]: Weakened 110 states. On average, predicates are now at 77.73% of their original sizes. [2018-11-12 19:07:03,094 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:07:05,379 INFO L415 sIntCurrentIteration]: We unified 358 AI predicates to 358 [2018-11-12 19:07:05,380 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:07:05,380 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:07:05,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [12] total 30 [2018-11-12 19:07:05,380 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:07:05,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-12 19:07:05,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-12 19:07:05,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-11-12 19:07:05,381 INFO L87 Difference]: Start difference. First operand 1916 states and 2838 transitions. Second operand 20 states. [2018-11-12 19:07:29,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:07:29,096 INFO L93 Difference]: Finished difference Result 4798 states and 6877 transitions. [2018-11-12 19:07:29,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-12 19:07:29,097 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 359 [2018-11-12 19:07:29,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:07:29,109 INFO L225 Difference]: With dead ends: 4798 [2018-11-12 19:07:29,109 INFO L226 Difference]: Without dead ends: 2286 [2018-11-12 19:07:29,120 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 368 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2018-11-12 19:07:29,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2018-11-12 19:07:29,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 2284. [2018-11-12 19:07:29,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2284 states. [2018-11-12 19:07:29,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 3214 transitions. [2018-11-12 19:07:29,182 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 3214 transitions. Word has length 359 [2018-11-12 19:07:29,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:07:29,183 INFO L480 AbstractCegarLoop]: Abstraction has 2284 states and 3214 transitions. [2018-11-12 19:07:29,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-12 19:07:29,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 3214 transitions. [2018-11-12 19:07:29,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2018-11-12 19:07:29,196 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:07:29,196 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:07:29,197 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:07:29,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:07:29,197 INFO L82 PathProgramCache]: Analyzing trace with hash -2119199892, now seen corresponding path program 1 times [2018-11-12 19:07:29,197 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:07:29,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:07:29,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:07:29,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:07:29,199 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:07:29,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:07:29,728 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:07:29,943 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 19:07:30,154 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:07:30,554 WARN L179 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-11-12 19:07:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 139 proven. 316 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:07:31,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:07:31,253 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:07:31,253 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 386 with the following transitions: [2018-11-12 19:07:31,254 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], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [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], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:07:31,258 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:07:31,258 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:07:31,356 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:07:31,450 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:07:31,451 INFO L272 AbstractInterpreter]: Visited 122 different actions 240 times. Merged at 5 different actions 7 times. Never widened. Performed 3139 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3139 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:07:31,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:07:31,456 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:07:31,872 INFO L227 lantSequenceWeakener]: Weakened 48 states. On average, predicates are now at 81.01% of their original sizes. [2018-11-12 19:07:31,873 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:07:32,485 INFO L415 sIntCurrentIteration]: We unified 384 AI predicates to 384 [2018-11-12 19:07:32,485 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:07:32,486 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:07:32,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [15] total 33 [2018-11-12 19:07:32,486 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:07:32,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-12 19:07:32,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-12 19:07:32,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2018-11-12 19:07:32,487 INFO L87 Difference]: Start difference. First operand 2284 states and 3214 transitions. Second operand 20 states. [2018-11-12 19:07:49,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:07:49,155 INFO L93 Difference]: Finished difference Result 4384 states and 6418 transitions. [2018-11-12 19:07:49,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-12 19:07:49,155 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 385 [2018-11-12 19:07:49,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:07:49,168 INFO L225 Difference]: With dead ends: 4384 [2018-11-12 19:07:49,168 INFO L226 Difference]: Without dead ends: 2657 [2018-11-12 19:07:49,176 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 400 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=244, Invalid=1016, Unknown=0, NotChecked=0, Total=1260 [2018-11-12 19:07:49,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2018-11-12 19:07:49,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2652. [2018-11-12 19:07:49,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2652 states. [2018-11-12 19:07:49,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 3610 transitions. [2018-11-12 19:07:49,241 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 3610 transitions. Word has length 385 [2018-11-12 19:07:49,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:07:49,242 INFO L480 AbstractCegarLoop]: Abstraction has 2652 states and 3610 transitions. [2018-11-12 19:07:49,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-12 19:07:49,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 3610 transitions. [2018-11-12 19:07:49,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2018-11-12 19:07:49,257 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:07:49,257 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:07:49,258 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:07:49,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:07:49,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1707416776, now seen corresponding path program 1 times [2018-11-12 19:07:49,258 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:07:49,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:07:49,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:07:49,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:07:49,259 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:07:49,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:07:49,772 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:07:50,499 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 242 proven. 216 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:07:50,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:07:50,500 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:07:50,500 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 396 with the following transitions: [2018-11-12 19:07:50,500 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], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [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], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [698], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:07:50,504 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:07:50,504 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:07:50,558 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:07:50,706 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:07:50,706 INFO L272 AbstractInterpreter]: Visited 130 different actions 253 times. Merged at 4 different actions 4 times. Never widened. Performed 3326 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3326 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:07:50,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:07:50,714 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:07:51,250 INFO L227 lantSequenceWeakener]: Weakened 139 states. On average, predicates are now at 77.63% of their original sizes. [2018-11-12 19:07:51,250 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:07:51,898 INFO L415 sIntCurrentIteration]: We unified 394 AI predicates to 394 [2018-11-12 19:07:51,899 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:07:51,899 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:07:51,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [12] total 31 [2018-11-12 19:07:51,899 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:07:51,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-12 19:07:51,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-12 19:07:51,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2018-11-12 19:07:51,901 INFO L87 Difference]: Start difference. First operand 2652 states and 3610 transitions. Second operand 21 states. [2018-11-12 19:08:09,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:08:09,459 INFO L93 Difference]: Finished difference Result 5354 states and 7460 transitions. [2018-11-12 19:08:09,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-12 19:08:09,459 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 395 [2018-11-12 19:08:09,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:08:09,471 INFO L225 Difference]: With dead ends: 5354 [2018-11-12 19:08:09,471 INFO L226 Difference]: Without dead ends: 2842 [2018-11-12 19:08:09,481 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 402 GetRequests, 366 SyntacticMatches, 9 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2018-11-12 19:08:09,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2018-11-12 19:08:09,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 2654. [2018-11-12 19:08:09,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2654 states. [2018-11-12 19:08:09,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3611 transitions. [2018-11-12 19:08:09,544 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3611 transitions. Word has length 395 [2018-11-12 19:08:09,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:08:09,544 INFO L480 AbstractCegarLoop]: Abstraction has 2654 states and 3611 transitions. [2018-11-12 19:08:09,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-12 19:08:09,545 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3611 transitions. [2018-11-12 19:08:09,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2018-11-12 19:08:09,560 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:08:09,560 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:08:09,561 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:08:09,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:08:09,561 INFO L82 PathProgramCache]: Analyzing trace with hash -669910593, now seen corresponding path program 1 times [2018-11-12 19:08:09,561 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:08:09,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:09,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:08:09,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:09,563 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:08:09,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:08:10,038 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:08:10,245 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 19:08:10,448 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:08:10,745 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-11-12 19:08:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 226 proven. 232 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:08:11,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:08:11,258 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:08:11,258 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 421 with the following transitions: [2018-11-12 19:08:11,259 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], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [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], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [798], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:08:11,261 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:08:11,262 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:08:11,340 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:08:11,659 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:08:11,659 INFO L272 AbstractInterpreter]: Visited 155 different actions 303 times. Merged at 4 different actions 4 times. Never widened. Performed 4220 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4220 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:08:11,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:08:11,694 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:08:12,872 INFO L227 lantSequenceWeakener]: Weakened 106 states. On average, predicates are now at 77.74% of their original sizes. [2018-11-12 19:08:12,872 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:08:13,480 INFO L415 sIntCurrentIteration]: We unified 419 AI predicates to 419 [2018-11-12 19:08:13,481 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:08:13,481 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:08:13,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [13] total 29 [2018-11-12 19:08:13,482 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:08:13,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-12 19:08:13,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-12 19:08:13,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2018-11-12 19:08:13,484 INFO L87 Difference]: Start difference. First operand 2654 states and 3611 transitions. Second operand 18 states. [2018-11-12 19:08:30,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:08:30,947 INFO L93 Difference]: Finished difference Result 5354 states and 7460 transitions. [2018-11-12 19:08:30,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-12 19:08:30,947 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 420 [2018-11-12 19:08:30,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:08:30,958 INFO L225 Difference]: With dead ends: 5354 [2018-11-12 19:08:30,959 INFO L226 Difference]: Without dead ends: 2842 [2018-11-12 19:08:30,966 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 427 GetRequests, 397 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2018-11-12 19:08:30,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2018-11-12 19:08:31,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 2654. [2018-11-12 19:08:31,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2654 states. [2018-11-12 19:08:31,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3611 transitions. [2018-11-12 19:08:31,025 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3611 transitions. Word has length 420 [2018-11-12 19:08:31,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:08:31,026 INFO L480 AbstractCegarLoop]: Abstraction has 2654 states and 3611 transitions. [2018-11-12 19:08:31,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-12 19:08:31,026 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3611 transitions. [2018-11-12 19:08:31,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2018-11-12 19:08:31,040 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:08:31,040 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:08:31,041 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:08:31,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:08:31,041 INFO L82 PathProgramCache]: Analyzing trace with hash 855280652, now seen corresponding path program 1 times [2018-11-12 19:08:31,041 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:08:31,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:31,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:08:31,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:31,042 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:08:31,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:08:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 213 proven. 245 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:08:31,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:08:31,850 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:08:31,850 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 434 with the following transitions: [2018-11-12 19:08:31,850 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], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [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], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [850], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:08:31,853 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:08:31,854 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:08:31,927 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:08:32,143 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:08:32,143 INFO L272 AbstractInterpreter]: Visited 168 different actions 329 times. Merged at 4 different actions 4 times. Never widened. Performed 4515 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4515 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:08:32,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:08:32,150 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:08:32,762 INFO L227 lantSequenceWeakener]: Weakened 106 states. On average, predicates are now at 77.74% of their original sizes. [2018-11-12 19:08:32,762 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:08:33,482 INFO L415 sIntCurrentIteration]: We unified 432 AI predicates to 432 [2018-11-12 19:08:33,483 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:08:33,483 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:08:33,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [12] total 29 [2018-11-12 19:08:33,484 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:08:33,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-12 19:08:33,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-12 19:08:33,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2018-11-12 19:08:33,486 INFO L87 Difference]: Start difference. First operand 2654 states and 3611 transitions. Second operand 19 states. [2018-11-12 19:08:56,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:08:56,231 INFO L93 Difference]: Finished difference Result 5354 states and 7460 transitions. [2018-11-12 19:08:56,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-12 19:08:56,231 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 433 [2018-11-12 19:08:56,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:08:56,243 INFO L225 Difference]: With dead ends: 5354 [2018-11-12 19:08:56,244 INFO L226 Difference]: Without dead ends: 2842 [2018-11-12 19:08:56,252 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 441 GetRequests, 409 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2018-11-12 19:08:56,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2018-11-12 19:08:56,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 2654. [2018-11-12 19:08:56,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2654 states. [2018-11-12 19:08:56,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3611 transitions. [2018-11-12 19:08:56,313 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3611 transitions. Word has length 433 [2018-11-12 19:08:56,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:08:56,314 INFO L480 AbstractCegarLoop]: Abstraction has 2654 states and 3611 transitions. [2018-11-12 19:08:56,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-12 19:08:56,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3611 transitions. [2018-11-12 19:08:56,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2018-11-12 19:08:56,326 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:08:56,326 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:08:56,326 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:08:56,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:08:56,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1945896396, now seen corresponding path program 1 times [2018-11-12 19:08:56,327 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:08:56,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:56,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:08:56,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:56,328 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:08:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:08:56,795 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:08:56,994 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 19:08:57,225 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:08:57,730 WARN L179 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-11-12 19:08:58,237 WARN L179 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2018-11-12 19:08:58,699 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 201 proven. 257 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:08:58,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:08:58,699 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:08:58,699 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 446 with the following transitions: [2018-11-12 19:08:58,700 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], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [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], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [898], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:08:58,702 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:08:58,702 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:08:58,811 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:08:59,093 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:08:59,094 INFO L272 AbstractInterpreter]: Visited 180 different actions 356 times. Merged at 5 different actions 7 times. Never widened. Performed 6633 root evaluator evaluations with a maximum evaluation depth of 6. Performed 6633 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:08:59,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:08:59,104 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:09:03,165 INFO L227 lantSequenceWeakener]: Weakened 137 states. On average, predicates are now at 77.64% of their original sizes. [2018-11-12 19:09:03,165 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:09:03,891 INFO L415 sIntCurrentIteration]: We unified 444 AI predicates to 444 [2018-11-12 19:09:03,891 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:09:03,891 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:09:03,891 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [14] total 34 [2018-11-12 19:09:03,891 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:09:03,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-12 19:09:03,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-12 19:09:03,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2018-11-12 19:09:03,893 INFO L87 Difference]: Start difference. First operand 2654 states and 3611 transitions. Second operand 22 states. [2018-11-12 19:09:28,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:09:28,781 INFO L93 Difference]: Finished difference Result 5352 states and 7458 transitions. [2018-11-12 19:09:28,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-12 19:09:28,782 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 445 [2018-11-12 19:09:28,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:09:28,793 INFO L225 Difference]: With dead ends: 5352 [2018-11-12 19:09:28,793 INFO L226 Difference]: Without dead ends: 2840 [2018-11-12 19:09:28,801 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 453 GetRequests, 418 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2018-11-12 19:09:28,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2018-11-12 19:09:28,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2652. [2018-11-12 19:09:28,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2652 states. [2018-11-12 19:09:28,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 3609 transitions. [2018-11-12 19:09:28,856 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 3609 transitions. Word has length 445 [2018-11-12 19:09:28,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:09:28,857 INFO L480 AbstractCegarLoop]: Abstraction has 2652 states and 3609 transitions. [2018-11-12 19:09:28,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-12 19:09:28,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 3609 transitions. [2018-11-12 19:09:28,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2018-11-12 19:09:28,868 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:09:28,869 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:09:28,869 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:09:28,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:09:28,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1869819802, now seen corresponding path program 1 times [2018-11-12 19:09:28,869 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:09:28,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:09:28,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:09:28,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:09:28,870 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:09:28,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:09:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 261 proven. 166 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-11-12 19:09:29,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:09:29,668 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:09:29,669 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 471 with the following transitions: [2018-11-12 19:09:29,669 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], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:09:29,670 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:09:29,670 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:09:29,735 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:09:29,948 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 19:09:29,948 INFO L272 AbstractInterpreter]: Visited 124 different actions 365 times. Merged at 7 different actions 17 times. Never widened. Performed 4515 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4515 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 19:09:29,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:09:29,956 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 19:09:29,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:09:29,956 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 19:09:29,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:09:29,966 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 19:09:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:09:30,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 19:09:30,432 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 557 proven. 2 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2018-11-12 19:09:30,432 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 19:09:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 261 proven. 166 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-11-12 19:09:31,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 19:09:31,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-12 19:09:31,315 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 19:09:31,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 19:09:31,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 19:09:31,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-11-12 19:09:31,317 INFO L87 Difference]: Start difference. First operand 2652 states and 3609 transitions. Second operand 9 states. [2018-11-12 19:09:35,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:09:35,764 INFO L93 Difference]: Finished difference Result 6619 states and 9790 transitions. [2018-11-12 19:09:35,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 19:09:35,764 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 470 [2018-11-12 19:09:35,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:09:35,790 INFO L225 Difference]: With dead ends: 6619 [2018-11-12 19:09:35,790 INFO L226 Difference]: Without dead ends: 4524 [2018-11-12 19:09:35,810 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 970 GetRequests, 947 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2018-11-12 19:09:35,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4524 states. [2018-11-12 19:09:35,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4524 to 4341. [2018-11-12 19:09:35,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4341 states. [2018-11-12 19:09:35,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4341 states to 4341 states and 6022 transitions. [2018-11-12 19:09:35,918 INFO L78 Accepts]: Start accepts. Automaton has 4341 states and 6022 transitions. Word has length 470 [2018-11-12 19:09:35,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:09:35,919 INFO L480 AbstractCegarLoop]: Abstraction has 4341 states and 6022 transitions. [2018-11-12 19:09:35,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-12 19:09:35,919 INFO L276 IsEmpty]: Start isEmpty. Operand 4341 states and 6022 transitions. [2018-11-12 19:09:35,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2018-11-12 19:09:35,938 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:09:35,938 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:09:35,938 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:09:35,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:09:35,939 INFO L82 PathProgramCache]: Analyzing trace with hash 819867949, now seen corresponding path program 1 times [2018-11-12 19:09:35,939 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:09:35,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:09:35,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:09:35,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:09:35,940 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:09:35,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:09:37,084 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 279 proven. 482 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:09:37,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:09:37,085 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:09:37,085 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 474 with the following transitions: [2018-11-12 19:09:37,085 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], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [566], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:09:37,087 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:09:37,087 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:09:37,182 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:09:37,424 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 19:09:37,424 INFO L272 AbstractInterpreter]: Visited 124 different actions 365 times. Merged at 7 different actions 17 times. Never widened. Performed 5199 root evaluator evaluations with a maximum evaluation depth of 6. Performed 5199 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 19:09:37,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:09:37,431 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 19:09:37,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:09:37,431 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 19:09:37,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:09:37,440 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 19:09:37,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:09:37,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 19:09:38,055 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 503 proven. 135 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2018-11-12 19:09:38,055 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 19:09:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 191 proven. 485 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-11-12 19:09:38,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 19:09:38,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 23 [2018-11-12 19:09:38,976 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 19:09:38,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-12 19:09:38,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-12 19:09:38,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2018-11-12 19:09:38,978 INFO L87 Difference]: Start difference. First operand 4341 states and 6022 transitions. Second operand 18 states. [2018-11-12 19:09:42,707 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2018-11-12 19:09:42,886 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2018-11-12 19:09:46,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:09:46,150 INFO L93 Difference]: Finished difference Result 10357 states and 14853 transitions. [2018-11-12 19:09:46,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-12 19:09:46,161 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 473 [2018-11-12 19:09:46,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:09:46,209 INFO L225 Difference]: With dead ends: 10357 [2018-11-12 19:09:46,211 INFO L226 Difference]: Without dead ends: 6365 [2018-11-12 19:09:46,229 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1009 GetRequests, 961 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=526, Invalid=1730, Unknown=0, NotChecked=0, Total=2256 [2018-11-12 19:09:46,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6365 states. [2018-11-12 19:09:46,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6365 to 5977. [2018-11-12 19:09:46,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5977 states. [2018-11-12 19:09:46,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5977 states to 5977 states and 7945 transitions. [2018-11-12 19:09:46,387 INFO L78 Accepts]: Start accepts. Automaton has 5977 states and 7945 transitions. Word has length 473 [2018-11-12 19:09:46,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:09:46,388 INFO L480 AbstractCegarLoop]: Abstraction has 5977 states and 7945 transitions. [2018-11-12 19:09:46,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-12 19:09:46,388 INFO L276 IsEmpty]: Start isEmpty. Operand 5977 states and 7945 transitions. [2018-11-12 19:09:46,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2018-11-12 19:09:46,409 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:09:46,410 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, 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, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:09:46,410 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:09:46,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:09:46,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1255475487, now seen corresponding path program 1 times [2018-11-12 19:09:46,411 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:09:46,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:09:46,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:09:46,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:09:46,412 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:09:46,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:09:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 400 proven. 111 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-11-12 19:09:47,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:09:47,215 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:09:47,215 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 496 with the following transitions: [2018-11-12 19:09:47,215 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], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [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], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:09:47,217 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:09:47,217 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:09:47,281 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:09:47,601 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:09:47,601 INFO L272 AbstractInterpreter]: Visited 123 different actions 369 times. Merged at 7 different actions 22 times. Never widened. Performed 3640 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3640 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 19:09:47,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:09:47,644 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:09:48,261 INFO L227 lantSequenceWeakener]: Weakened 492 states. On average, predicates are now at 80.2% of their original sizes. [2018-11-12 19:09:48,261 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:09:48,500 INFO L415 sIntCurrentIteration]: We unified 494 AI predicates to 494 [2018-11-12 19:09:48,500 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:09:48,501 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:09:48,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-11-12 19:09:48,501 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:09:48,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 19:09:48,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 19:09:48,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-12 19:09:48,502 INFO L87 Difference]: Start difference. First operand 5977 states and 7945 transitions. Second operand 10 states. [2018-11-12 19:09:54,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:09:54,270 INFO L93 Difference]: Finished difference Result 12354 states and 16705 transitions. [2018-11-12 19:09:54,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 19:09:54,270 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 495 [2018-11-12 19:09:54,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:09:54,292 INFO L225 Difference]: With dead ends: 12354 [2018-11-12 19:09:54,292 INFO L226 Difference]: Without dead ends: 6751 [2018-11-12 19:09:54,310 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 502 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-12 19:09:54,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6751 states. [2018-11-12 19:09:54,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6751 to 6717. [2018-11-12 19:09:54,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6717 states. [2018-11-12 19:09:54,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6717 states to 6717 states and 8821 transitions. [2018-11-12 19:09:54,430 INFO L78 Accepts]: Start accepts. Automaton has 6717 states and 8821 transitions. Word has length 495 [2018-11-12 19:09:54,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:09:54,431 INFO L480 AbstractCegarLoop]: Abstraction has 6717 states and 8821 transitions. [2018-11-12 19:09:54,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 19:09:54,431 INFO L276 IsEmpty]: Start isEmpty. Operand 6717 states and 8821 transitions. [2018-11-12 19:09:54,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2018-11-12 19:09:54,451 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:09:54,451 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, 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, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2018-11-12 19:09:54,451 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:09:54,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:09:54,452 INFO L82 PathProgramCache]: Analyzing trace with hash -124366288, now seen corresponding path program 1 times [2018-11-12 19:09:54,452 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:09:54,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:09:54,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:09:54,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:09:54,453 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:09:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:09:55,852 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 402 proven. 321 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-11-12 19:09:55,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:09:55,853 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:09:55,853 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 563 with the following transitions: [2018-11-12 19:09:55,853 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], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [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], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [662], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:09:55,856 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:09:55,856 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:09:56,376 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:09:57,076 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 19:09:57,077 INFO L272 AbstractInterpreter]: Visited 191 different actions 955 times. Merged at 9 different actions 48 times. Widened at 1 different actions 2 times. Performed 12589 root evaluator evaluations with a maximum evaluation depth of 6. Performed 12589 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 10 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 19:09:57,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:09:57,090 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 19:09:57,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:09:57,090 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 19:09:57,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:09:57,100 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 19:09:57,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:09:57,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 19:09:57,598 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 680 proven. 2 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2018-11-12 19:09:57,598 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 19:09:58,206 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 400 proven. 111 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-11-12 19:09:58,226 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 19:09:58,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 20 [2018-11-12 19:09:58,227 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 19:09:58,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 19:09:58,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 19:09:58,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2018-11-12 19:09:58,229 INFO L87 Difference]: Start difference. First operand 6717 states and 8821 transitions. Second operand 17 states. [2018-11-12 19:10:00,838 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2018-11-12 19:10:01,267 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2018-11-12 19:10:02,544 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2018-11-12 19:10:03,290 WARN L179 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 Received shutdown request... [2018-11-12 19:10:06,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-12 19:10:06,189 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 19:10:06,196 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 19:10:06,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 07:10:06 BoogieIcfgContainer [2018-11-12 19:10:06,197 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 19:10:06,198 INFO L168 Benchmark]: Toolchain (without parser) took 218610.51 ms. Allocated memory was 1.5 GB in the beginning and 4.9 GB in the end (delta: 3.3 GB). Free memory was 1.4 GB in the beginning and 3.2 GB in the end (delta: -1.7 GB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-11-12 19:10:06,199 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 19:10:06,200 INFO L168 Benchmark]: CACSL2BoogieTranslator took 979.11 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-11-12 19:10:06,200 INFO L168 Benchmark]: Boogie Procedure Inliner took 137.82 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 741.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -831.7 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2018-11-12 19:10:06,201 INFO L168 Benchmark]: Boogie Preprocessor took 124.46 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 19:10:06,202 INFO L168 Benchmark]: RCFGBuilder took 3611.35 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 130.1 MB). Peak memory consumption was 130.1 MB. Max. memory is 7.1 GB. [2018-11-12 19:10:06,202 INFO L168 Benchmark]: TraceAbstraction took 213752.43 ms. Allocated memory was 2.3 GB in the beginning and 4.9 GB in the end (delta: 2.6 GB). Free memory was 2.1 GB in the beginning and 3.2 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-11-12 19:10:06,207 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 979.11 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 137.82 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 741.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -831.7 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.46 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 3611.35 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 130.1 MB). Peak memory consumption was 130.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 213752.43 ms. Allocated memory was 2.3 GB in the beginning and 4.9 GB in the end (delta: 2.6 GB). Free memory was 2.1 GB in the beginning and 3.2 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 130]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 130). Cancelled while BasicCegarLoop was constructing difference of abstraction (6717states) and FLOYD_HOARE automaton (currently 44 states, 17 states before enhancement),while ReachableStatesComputation was computing reachable states (6367 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 213.6s OverallTime, 14 OverallIterations, 5 TraceHistogramMax, 172.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2529 SDtfs, 35344 SDslu, 3356 SDs, 0 SdLazy, 37523 SolverSat, 4781 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 64.7s Time, PredicateUnifierStatistics: 16 DeclaredPredicates, 6471 GetRequests, 6114 SyntacticMatches, 34 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2824 ImplicationChecksByTransitivity, 13.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6717occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 5.3s AbstIntTime, 11 AbstIntIterations, 8 AbstIntStrong, 0.9975280429541746 AbsIntWeakeningRatio, 0.08005003126954346 AbsIntAvgWeakeningVarsNumRemoved, 12.299562226391494 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 13 MinimizatonAttempts, 1375 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 14.5s InterpolantComputationTime, 6546 NumberOfCodeBlocks, 6546 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 8031 ConstructedInterpolants, 0 QuantifiedInterpolants, 26248939 SizeOfPredicates, 13 NumberOfNonLiveVariables, 2283 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 20 InterpolantComputations, 3 PerfectInterpolantSequences, 7354/10897 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown