java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label10_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 15:18:15,705 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 15:18:15,707 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 15:18:15,719 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 15:18:15,719 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 15:18:15,720 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 15:18:15,722 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 15:18:15,725 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 15:18:15,728 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 15:18:15,732 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 15:18:15,733 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 15:18:15,733 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 15:18:15,734 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 15:18:15,740 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 15:18:15,741 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 15:18:15,743 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 15:18:15,744 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 15:18:15,748 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 15:18:15,749 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 15:18:15,752 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 15:18:15,753 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 15:18:15,756 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 15:18:15,762 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-11-07 15:18:15,772 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 15:18:15,772 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 15:18:15,774 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 15:18:15,774 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 15:18:15,775 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-11-07 15:18:15,794 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 15:18:15,794 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 15:18:15,795 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 15:18:15,795 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 15:18:15,795 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 15:18:15,795 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 15:18:15,796 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 15:18:15,796 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 15:18:15,796 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 15:18:15,796 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 15:18:15,796 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 15:18:15,797 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 15:18:15,797 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 15:18:15,797 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 15:18:15,798 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 15:18:15,798 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 15:18:15,798 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 15:18:15,798 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 15:18:15,798 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 15:18:15,798 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 15:18:15,799 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 15:18:15,799 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 15:18:15,799 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 15:18:15,799 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 15:18:15,799 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 15:18:15,800 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 15:18:15,800 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 15:18:15,800 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 15:18:15,800 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 15:18:15,800 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 15:18:15,800 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 15:18:15,801 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 15:18:15,801 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 15:18:15,801 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 15:18:15,865 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 15:18:15,879 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 15:18:15,883 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 15:18:15,885 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 15:18:15,885 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 15:18:15,886 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label10_true-unreach-call.c [2018-11-07 15:18:15,947 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62640bcd9/13076f293b4e412ba9318c38bc72e4ee/FLAG0b536f411 [2018-11-07 15:18:16,647 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 15:18:16,648 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label10_true-unreach-call.c [2018-11-07 15:18:16,667 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62640bcd9/13076f293b4e412ba9318c38bc72e4ee/FLAG0b536f411 [2018-11-07 15:18:16,686 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62640bcd9/13076f293b4e412ba9318c38bc72e4ee [2018-11-07 15:18:16,695 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 15:18:16,697 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 15:18:16,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 15:18:16,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 15:18:16,701 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 15:18:16,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:18:16" (1/1) ... [2018-11-07 15:18:16,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41600c68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:18:16, skipping insertion in model container [2018-11-07 15:18:16,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:18:16" (1/1) ... [2018-11-07 15:18:16,714 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 15:18:16,793 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 15:18:17,462 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:18:17,467 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 15:18:17,722 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:18:17,742 INFO L193 MainTranslator]: Completed translation [2018-11-07 15:18:17,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:18:17 WrapperNode [2018-11-07 15:18:17,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 15:18:17,744 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 15:18:17,744 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 15:18:17,745 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 15:18:17,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:18:17" (1/1) ... [2018-11-07 15:18:17,938 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:18:17" (1/1) ... [2018-11-07 15:18:17,951 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 15:18:17,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 15:18:17,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 15:18:17,955 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 15:18:17,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:18:17" (1/1) ... [2018-11-07 15:18:17,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:18:17" (1/1) ... [2018-11-07 15:18:17,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:18:17" (1/1) ... [2018-11-07 15:18:17,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:18:17" (1/1) ... [2018-11-07 15:18:18,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:18:17" (1/1) ... [2018-11-07 15:18:18,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:18:17" (1/1) ... [2018-11-07 15:18:18,076 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:18:17" (1/1) ... [2018-11-07 15:18:18,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 15:18:18,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 15:18:18,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 15:18:18,099 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 15:18:18,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:18:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 15:18:18,156 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 15:18:18,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 15:18:18,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 15:18:18,157 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 15:18:18,157 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 15:18:18,157 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 15:18:18,158 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 15:18:18,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 15:18:18,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 15:18:18,158 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 15:18:18,158 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 15:18:25,538 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 15:18:25,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:18:25 BoogieIcfgContainer [2018-11-07 15:18:25,539 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 15:18:25,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 15:18:25,540 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 15:18:25,544 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 15:18:25,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:18:16" (1/3) ... [2018-11-07 15:18:25,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355bcfcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:18:25, skipping insertion in model container [2018-11-07 15:18:25,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:18:17" (2/3) ... [2018-11-07 15:18:25,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355bcfcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:18:25, skipping insertion in model container [2018-11-07 15:18:25,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:18:25" (3/3) ... [2018-11-07 15:18:25,548 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label10_true-unreach-call.c [2018-11-07 15:18:25,557 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 15:18:25,566 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 15:18:25,581 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 15:18:25,622 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 15:18:25,623 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 15:18:25,623 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 15:18:25,623 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 15:18:25,623 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 15:18:25,623 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 15:18:25,624 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 15:18:25,624 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 15:18:25,658 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-11-07 15:18:25,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-07 15:18:25,666 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:18:25,668 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:18:25,670 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:18:25,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:18:25,676 INFO L82 PathProgramCache]: Analyzing trace with hash -369179421, now seen corresponding path program 1 times [2018-11-07 15:18:25,679 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:18:25,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:18:25,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:18:25,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:18:25,734 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:18:25,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:18:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:18:26,143 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:18:26,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 15:18:26,144 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:18:26,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 15:18:26,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 15:18:26,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:18:26,185 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 4 states. [2018-11-07 15:18:32,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:18:32,744 INFO L93 Difference]: Finished difference Result 1513 states and 2838 transitions. [2018-11-07 15:18:32,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 15:18:32,745 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2018-11-07 15:18:32,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:18:32,773 INFO L225 Difference]: With dead ends: 1513 [2018-11-07 15:18:32,773 INFO L226 Difference]: Without dead ends: 1097 [2018-11-07 15:18:32,786 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:18:32,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2018-11-07 15:18:32,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1097. [2018-11-07 15:18:32,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1097 states. [2018-11-07 15:18:32,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1954 transitions. [2018-11-07 15:18:32,910 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1954 transitions. Word has length 39 [2018-11-07 15:18:32,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:18:32,911 INFO L480 AbstractCegarLoop]: Abstraction has 1097 states and 1954 transitions. [2018-11-07 15:18:32,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 15:18:32,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1954 transitions. [2018-11-07 15:18:32,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-11-07 15:18:32,919 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:18:32,919 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:18:32,920 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:18:32,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:18:32,920 INFO L82 PathProgramCache]: Analyzing trace with hash -820358275, now seen corresponding path program 1 times [2018-11-07 15:18:32,920 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:18:32,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:18:32,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:18:32,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:18:32,922 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:18:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:18:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:18:33,200 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:18:33,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:18:33,200 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:18:33,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:18:33,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:18:33,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:18:33,203 INFO L87 Difference]: Start difference. First operand 1097 states and 1954 transitions. Second operand 6 states. [2018-11-07 15:18:38,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:18:38,062 INFO L93 Difference]: Finished difference Result 3259 states and 5952 transitions. [2018-11-07 15:18:38,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:18:38,074 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 110 [2018-11-07 15:18:38,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:18:38,098 INFO L225 Difference]: With dead ends: 3259 [2018-11-07 15:18:38,098 INFO L226 Difference]: Without dead ends: 2168 [2018-11-07 15:18:38,106 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:18:38,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2018-11-07 15:18:38,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 2142. [2018-11-07 15:18:38,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2142 states. [2018-11-07 15:18:38,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 3739 transitions. [2018-11-07 15:18:38,204 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 3739 transitions. Word has length 110 [2018-11-07 15:18:38,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:18:38,204 INFO L480 AbstractCegarLoop]: Abstraction has 2142 states and 3739 transitions. [2018-11-07 15:18:38,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:18:38,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 3739 transitions. [2018-11-07 15:18:38,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-11-07 15:18:38,223 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:18:38,224 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:18:38,224 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:18:38,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:18:38,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1928773899, now seen corresponding path program 1 times [2018-11-07 15:18:38,224 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:18:38,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:18:38,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:18:38,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:18:38,226 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:18:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:18:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:18:38,491 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:18:38,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:18:38,492 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:18:38,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:18:38,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:18:38,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:18:38,493 INFO L87 Difference]: Start difference. First operand 2142 states and 3739 transitions. Second operand 6 states. [2018-11-07 15:18:43,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:18:43,639 INFO L93 Difference]: Finished difference Result 7053 states and 12688 transitions. [2018-11-07 15:18:43,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:18:43,642 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 138 [2018-11-07 15:18:43,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:18:43,681 INFO L225 Difference]: With dead ends: 7053 [2018-11-07 15:18:43,682 INFO L226 Difference]: Without dead ends: 4917 [2018-11-07 15:18:43,703 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:18:43,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4917 states. [2018-11-07 15:18:43,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4917 to 4877. [2018-11-07 15:18:43,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4877 states. [2018-11-07 15:18:43,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4877 states to 4877 states and 7891 transitions. [2018-11-07 15:18:43,863 INFO L78 Accepts]: Start accepts. Automaton has 4877 states and 7891 transitions. Word has length 138 [2018-11-07 15:18:43,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:18:43,863 INFO L480 AbstractCegarLoop]: Abstraction has 4877 states and 7891 transitions. [2018-11-07 15:18:43,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:18:43,864 INFO L276 IsEmpty]: Start isEmpty. Operand 4877 states and 7891 transitions. [2018-11-07 15:18:43,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-11-07 15:18:43,866 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:18:43,866 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:18:43,867 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:18:43,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:18:43,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1730052985, now seen corresponding path program 1 times [2018-11-07 15:18:43,867 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:18:43,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:18:43,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:18:43,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:18:43,869 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:18:43,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:18:44,208 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:18:44,208 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:18:44,209 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:18:44,209 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:18:44,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:18:44,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:18:44,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:18:44,210 INFO L87 Difference]: Start difference. First operand 4877 states and 7891 transitions. Second operand 6 states. [2018-11-07 15:18:47,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:18:47,015 INFO L93 Difference]: Finished difference Result 11909 states and 19972 transitions. [2018-11-07 15:18:47,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:18:47,020 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 156 [2018-11-07 15:18:47,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:18:47,076 INFO L225 Difference]: With dead ends: 11909 [2018-11-07 15:18:47,076 INFO L226 Difference]: Without dead ends: 7038 [2018-11-07 15:18:47,103 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:18:47,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7038 states. [2018-11-07 15:18:47,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7038 to 6977. [2018-11-07 15:18:47,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6977 states. [2018-11-07 15:18:47,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6977 states to 6977 states and 9942 transitions. [2018-11-07 15:18:47,342 INFO L78 Accepts]: Start accepts. Automaton has 6977 states and 9942 transitions. Word has length 156 [2018-11-07 15:18:47,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:18:47,343 INFO L480 AbstractCegarLoop]: Abstraction has 6977 states and 9942 transitions. [2018-11-07 15:18:47,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:18:47,343 INFO L276 IsEmpty]: Start isEmpty. Operand 6977 states and 9942 transitions. [2018-11-07 15:18:47,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-11-07 15:18:47,350 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:18:47,350 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:18:47,351 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:18:47,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:18:47,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1129340368, now seen corresponding path program 1 times [2018-11-07 15:18:47,352 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:18:47,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:18:47,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:18:47,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:18:47,353 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:18:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:18:47,734 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:18:47,735 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:18:47,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:18:47,735 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:18:47,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:18:47,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:18:47,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:18:47,737 INFO L87 Difference]: Start difference. First operand 6977 states and 9942 transitions. Second operand 6 states. [2018-11-07 15:18:51,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:18:51,437 INFO L93 Difference]: Finished difference Result 17709 states and 25496 transitions. [2018-11-07 15:18:51,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:18:51,447 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 203 [2018-11-07 15:18:51,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:18:51,523 INFO L225 Difference]: With dead ends: 17709 [2018-11-07 15:18:51,523 INFO L226 Difference]: Without dead ends: 10738 [2018-11-07 15:18:51,579 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:18:51,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10738 states. [2018-11-07 15:18:51,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10738 to 10702. [2018-11-07 15:18:51,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10702 states. [2018-11-07 15:18:51,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10702 states to 10702 states and 14504 transitions. [2018-11-07 15:18:51,854 INFO L78 Accepts]: Start accepts. Automaton has 10702 states and 14504 transitions. Word has length 203 [2018-11-07 15:18:51,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:18:51,855 INFO L480 AbstractCegarLoop]: Abstraction has 10702 states and 14504 transitions. [2018-11-07 15:18:51,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:18:51,856 INFO L276 IsEmpty]: Start isEmpty. Operand 10702 states and 14504 transitions. [2018-11-07 15:18:51,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-11-07 15:18:51,859 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:18:51,860 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:18:51,860 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:18:51,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:18:51,861 INFO L82 PathProgramCache]: Analyzing trace with hash 2083831764, now seen corresponding path program 1 times [2018-11-07 15:18:51,861 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:18:51,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:18:51,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:18:51,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:18:51,862 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:18:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:18:52,113 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-11-07 15:18:52,114 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:18:52,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 15:18:52,114 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:18:52,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 15:18:52,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 15:18:52,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:18:52,116 INFO L87 Difference]: Start difference. First operand 10702 states and 14504 transitions. Second operand 4 states. [2018-11-07 15:18:55,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:18:55,801 INFO L93 Difference]: Finished difference Result 27183 states and 37572 transitions. [2018-11-07 15:18:55,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 15:18:55,809 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 240 [2018-11-07 15:18:55,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:18:55,887 INFO L225 Difference]: With dead ends: 27183 [2018-11-07 15:18:55,888 INFO L226 Difference]: Without dead ends: 16487 [2018-11-07 15:18:55,937 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:18:55,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16487 states. [2018-11-07 15:18:56,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16487 to 16487. [2018-11-07 15:18:56,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16487 states. [2018-11-07 15:18:56,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16487 states to 16487 states and 21483 transitions. [2018-11-07 15:18:56,363 INFO L78 Accepts]: Start accepts. Automaton has 16487 states and 21483 transitions. Word has length 240 [2018-11-07 15:18:56,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:18:56,364 INFO L480 AbstractCegarLoop]: Abstraction has 16487 states and 21483 transitions. [2018-11-07 15:18:56,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 15:18:56,364 INFO L276 IsEmpty]: Start isEmpty. Operand 16487 states and 21483 transitions. [2018-11-07 15:18:56,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2018-11-07 15:18:56,394 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:18:56,394 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:18:56,395 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:18:56,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:18:56,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1463225967, now seen corresponding path program 1 times [2018-11-07 15:18:56,395 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:18:56,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:18:56,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:18:56,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:18:56,401 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:18:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:18:57,160 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 215 proven. 115 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2018-11-07 15:18:57,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 15:18:57,161 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 15:18:57,162 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 425 with the following transitions: [2018-11-07 15:18:57,165 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [391], [393], [396], [404], [412], [420], [428], [436], [444], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [856], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [913], [917], [921], [925], [929], [933], [937], [941], [945], [948], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 15:18:57,216 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 15:18:57,217 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 15:18:58,062 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 15:18:58,066 INFO L272 AbstractInterpreter]: Visited 145 different actions 145 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 15:18:58,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:18:58,104 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 15:18:59,455 INFO L227 lantSequenceWeakener]: Weakened 396 states. On average, predicates are now at 77.57% of their original sizes. [2018-11-07 15:18:59,455 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 15:19:01,468 INFO L415 sIntCurrentIteration]: We unified 423 AI predicates to 423 [2018-11-07 15:19:01,468 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 15:19:01,469 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 15:19:01,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2018-11-07 15:19:01,470 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:19:01,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-07 15:19:01,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-07 15:19:01,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-11-07 15:19:01,471 INFO L87 Difference]: Start difference. First operand 16487 states and 21483 transitions. Second operand 11 states. [2018-11-07 15:19:07,443 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown