java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/loops/eureka_01_true-unreach-call.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:55:55,719 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:55:55,721 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:55:55,734 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:55:55,735 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:55:55,736 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:55:55,737 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:55:55,739 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:55:55,740 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:55:55,741 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:55:55,742 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:55:55,742 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:55:55,743 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:55:55,744 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:55:55,748 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:55:55,749 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:55:55,750 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:55:55,753 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:55:55,758 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:55:55,761 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:55:55,762 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:55:55,764 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:55:55,768 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 15:55:55,770 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 15:55:55,770 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 15:55:55,771 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 15:55:55,772 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 15:55:55,774 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 15:55:55,775 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 15:55:55,777 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 15:55:55,777 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 15:55:55,778 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-22 15:55:55,782 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-22 15:55:55,810 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:55:55,810 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:55:55,812 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:55:55,812 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 15:55:55,812 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 15:55:55,812 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 15:55:55,813 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 15:55:55,813 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 15:55:55,813 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-22 15:55:55,814 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 15:55:55,814 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 15:55:55,814 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 15:55:55,817 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:55:55,818 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:55:55,818 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:55:55,818 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:55:55,818 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:55:55,818 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:55:55,819 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:55:55,820 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:55:55,820 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:55:55,820 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:55:55,820 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:55:55,820 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:55:55,821 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:55:55,821 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:55:55,821 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:55:55,822 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:55:55,822 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 15:55:55,822 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:55:55,822 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:55:55,822 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:55:55,822 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:55:55,823 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-22 15:55:55,870 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:55:55,886 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:55:55,890 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:55:55,892 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:55:55,892 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:55:55,893 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/eureka_01_true-unreach-call.i [2018-10-22 15:55:55,955 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/dba2b36b5/d3c4b33582464f409ab6915a70283c89/FLAGba66ec432 [2018-10-22 15:55:56,421 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:55:56,422 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01_true-unreach-call.i [2018-10-22 15:55:56,430 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/dba2b36b5/d3c4b33582464f409ab6915a70283c89/FLAGba66ec432 [2018-10-22 15:55:56,448 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/dba2b36b5/d3c4b33582464f409ab6915a70283c89 [2018-10-22 15:55:56,462 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:55:56,464 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:55:56,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:55:56,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:55:56,472 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:55:56,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:55:56" (1/1) ... [2018-10-22 15:55:56,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@482d2ca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:56, skipping insertion in model container [2018-10-22 15:55:56,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:55:56" (1/1) ... [2018-10-22 15:55:56,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:55:56,512 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:55:56,699 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:55:56,703 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:55:56,769 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:55:56,802 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:55:56,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:56 WrapperNode [2018-10-22 15:55:56,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:55:56,803 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:55:56,804 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:55:56,804 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:55:56,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:56" (1/1) ... [2018-10-22 15:55:56,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:56" (1/1) ... [2018-10-22 15:55:56,904 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:55:56,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:55:56,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:55:56,905 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:55:56,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:56" (1/1) ... [2018-10-22 15:55:56,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:56" (1/1) ... [2018-10-22 15:55:56,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:56" (1/1) ... [2018-10-22 15:55:56,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:56" (1/1) ... [2018-10-22 15:55:56,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:56" (1/1) ... [2018-10-22 15:55:56,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:56" (1/1) ... [2018-10-22 15:55:56,995 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:56" (1/1) ... [2018-10-22 15:55:57,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:55:57,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:55:57,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:55:57,007 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:55:57,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:55:57,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 15:55:57,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 15:55:57,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:55:57,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:55:57,214 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 15:55:57,214 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 15:55:57,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 15:55:57,214 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 15:55:58,429 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:55:58,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:55:58 BoogieIcfgContainer [2018-10-22 15:55:58,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:55:58,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:55:58,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:55:58,436 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:55:58,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:55:56" (1/3) ... [2018-10-22 15:55:58,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21cdd2f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:55:58, skipping insertion in model container [2018-10-22 15:55:58,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:56" (2/3) ... [2018-10-22 15:55:58,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21cdd2f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:55:58, skipping insertion in model container [2018-10-22 15:55:58,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:55:58" (3/3) ... [2018-10-22 15:55:58,440 INFO L112 eAbstractionObserver]: Analyzing ICFG eureka_01_true-unreach-call.i [2018-10-22 15:55:58,450 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:55:58,462 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:55:58,481 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:55:58,516 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:55:58,517 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:55:58,518 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:55:58,518 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:55:58,518 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:55:58,519 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:55:58,519 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:55:58,520 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:55:58,520 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:55:58,543 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-10-22 15:55:58,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-22 15:55:58,552 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:58,555 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:55:58,557 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:58,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:58,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1090382313, now seen corresponding path program 1 times [2018-10-22 15:55:58,569 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:58,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:58,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:58,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:58,622 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:58,853 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:55:58,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:55:58,853 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:55:58,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:55:58,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:55:58,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:55:58,877 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2018-10-22 15:55:58,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:55:58,905 INFO L93 Difference]: Finished difference Result 70 states and 94 transitions. [2018-10-22 15:55:58,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:55:58,907 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2018-10-22 15:55:58,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:55:58,917 INFO L225 Difference]: With dead ends: 70 [2018-10-22 15:55:58,917 INFO L226 Difference]: Without dead ends: 35 [2018-10-22 15:55:58,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:55:58,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-22 15:55:58,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-22 15:55:58,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-22 15:55:58,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2018-10-22 15:55:58,968 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 18 [2018-10-22 15:55:58,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:55:58,969 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2018-10-22 15:55:58,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:55:58,969 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2018-10-22 15:55:58,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-22 15:55:58,970 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:58,970 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] [2018-10-22 15:55:58,973 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:58,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:58,973 INFO L82 PathProgramCache]: Analyzing trace with hash -448793496, now seen corresponding path program 1 times [2018-10-22 15:55:58,974 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:58,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:58,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:58,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:58,976 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:59,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:59,166 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:55:59,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 15:55:59,167 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:55:59,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 15:55:59,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 15:55:59,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:55:59,170 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 3 states. [2018-10-22 15:55:59,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:55:59,320 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2018-10-22 15:55:59,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:55:59,321 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2018-10-22 15:55:59,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:55:59,323 INFO L225 Difference]: With dead ends: 64 [2018-10-22 15:55:59,323 INFO L226 Difference]: Without dead ends: 39 [2018-10-22 15:55:59,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:55:59,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-22 15:55:59,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-10-22 15:55:59,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-22 15:55:59,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2018-10-22 15:55:59,332 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 21 [2018-10-22 15:55:59,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:55:59,332 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2018-10-22 15:55:59,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 15:55:59,333 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2018-10-22 15:55:59,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-22 15:55:59,334 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:59,334 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:55:59,334 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:59,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:59,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1500559425, now seen corresponding path program 1 times [2018-10-22 15:55:59,335 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:59,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:59,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:59,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:59,337 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:59,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:59,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:59,528 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:59,529 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:55:59,530 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 26 with the following transitions: [2018-10-22 15:55:59,532 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [17], [21], [25], [29], [32], [58], [62], [65], [77], [81], [86], [96], [99], [101], [107], [108], [109], [111] [2018-10-22 15:55:59,592 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 15:55:59,592 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 15:56:00,126 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-22 15:56:00,128 INFO L272 AbstractInterpreter]: Visited 11 different actions 15 times. Merged at 3 different actions 3 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 48 variables. [2018-10-22 15:56:00,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:56:00,143 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-22 15:56:00,618 INFO L232 lantSequenceWeakener]: Weakened 11 states. On average, predicates are now at 91.54% of their original sizes. [2018-10-22 15:56:00,618 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-22 15:56:00,857 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-22 15:56:00,858 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:56:00,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2018-10-22 15:56:00,858 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:56:00,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:56:00,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:56:00,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:56:00,861 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 5 states. [2018-10-22 15:56:02,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:56:02,381 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2018-10-22 15:56:02,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:56:02,381 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2018-10-22 15:56:02,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:56:02,383 INFO L225 Difference]: With dead ends: 72 [2018-10-22 15:56:02,383 INFO L226 Difference]: Without dead ends: 43 [2018-10-22 15:56:02,384 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:56:02,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-22 15:56:02,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2018-10-22 15:56:02,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-22 15:56:02,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2018-10-22 15:56:02,394 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 25 [2018-10-22 15:56:02,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:56:02,395 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2018-10-22 15:56:02,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:56:02,395 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2018-10-22 15:56:02,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-22 15:56:02,396 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:56:02,397 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:56:02,397 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:56:02,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:56:02,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1612370840, now seen corresponding path program 1 times [2018-10-22 15:56:02,398 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:56:02,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:02,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:56:02,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:02,400 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:56:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:56:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:56:02,734 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:02,734 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:56:02,735 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 30 with the following transitions: [2018-10-22 15:56:02,735 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [17], [19], [21], [25], [29], [32], [58], [62], [65], [77], [81], [86], [96], [99], [101], [107], [108], [109], [111] [2018-10-22 15:56:02,747 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 15:56:02,747 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 15:56:04,139 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-22 15:56:04,140 INFO L272 AbstractInterpreter]: Visited 15 different actions 57 times. Merged at 5 different actions 29 times. Widened at 1 different actions 2 times. Found 7 fixpoints after 4 different actions. Largest state had 48 variables. [2018-10-22 15:56:04,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:56:04,177 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-22 15:56:04,425 INFO L232 lantSequenceWeakener]: Weakened 18 states. On average, predicates are now at 79.38% of their original sizes. [2018-10-22 15:56:04,426 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-22 15:56:04,969 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-22 15:56:04,970 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:56:04,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2018-10-22 15:56:04,970 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:56:04,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:56:04,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:56:04,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:56:04,972 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 9 states. [2018-10-22 15:56:06,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:56:06,505 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2018-10-22 15:56:06,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 15:56:06,505 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2018-10-22 15:56:06,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:56:06,510 INFO L225 Difference]: With dead ends: 98 [2018-10-22 15:56:06,510 INFO L226 Difference]: Without dead ends: 73 [2018-10-22 15:56:06,511 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:56:06,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-22 15:56:06,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 60. [2018-10-22 15:56:06,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-22 15:56:06,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2018-10-22 15:56:06,542 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 29 [2018-10-22 15:56:06,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:56:06,542 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2018-10-22 15:56:06,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:56:06,545 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2018-10-22 15:56:06,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-22 15:56:06,547 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:56:06,547 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:56:06,547 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:56:06,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:56:06,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1288211203, now seen corresponding path program 1 times [2018-10-22 15:56:06,549 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:56:06,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:06,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:56:06,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:06,550 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:56:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:56:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-10-22 15:56:06,930 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:06,930 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:56:06,931 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 52 with the following transitions: [2018-10-22 15:56:06,931 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [17], [19], [21], [25], [29], [32], [34], [38], [41], [54], [58], [62], [65], [67], [71], [73], [77], [81], [86], [96], [99], [101], [107], [108], [109], [111] [2018-10-22 15:56:06,936 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 15:56:06,937 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 15:56:07,999 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-22 15:56:08,000 INFO L272 AbstractInterpreter]: Visited 18 different actions 60 times. Merged at 5 different actions 29 times. Widened at 1 different actions 2 times. Found 7 fixpoints after 4 different actions. Largest state had 55 variables. [2018-10-22 15:56:08,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:56:08,041 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-22 15:56:08,349 INFO L232 lantSequenceWeakener]: Weakened 26 states. On average, predicates are now at 61.32% of their original sizes. [2018-10-22 15:56:08,349 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-22 15:56:08,996 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-22 15:56:08,997 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:56:08,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2018-10-22 15:56:08,997 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:56:08,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 15:56:08,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 15:56:08,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:56:08,998 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 10 states. [2018-10-22 15:56:10,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:56:10,569 INFO L93 Difference]: Finished difference Result 110 states and 125 transitions. [2018-10-22 15:56:10,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 15:56:10,570 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2018-10-22 15:56:10,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:56:10,571 INFO L225 Difference]: With dead ends: 110 [2018-10-22 15:56:10,571 INFO L226 Difference]: Without dead ends: 73 [2018-10-22 15:56:10,572 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:56:10,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-22 15:56:10,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2018-10-22 15:56:10,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-22 15:56:10,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2018-10-22 15:56:10,599 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 51 [2018-10-22 15:56:10,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:56:10,600 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2018-10-22 15:56:10,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 15:56:10,600 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2018-10-22 15:56:10,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-22 15:56:10,602 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:56:10,602 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 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] [2018-10-22 15:56:10,602 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:56:10,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:56:10,603 INFO L82 PathProgramCache]: Analyzing trace with hash -425294966, now seen corresponding path program 1 times [2018-10-22 15:56:10,603 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:56:10,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:10,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:56:10,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:10,604 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:56:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:56:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-22 15:56:10,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:10,754 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:56:10,754 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 56 with the following transitions: [2018-10-22 15:56:10,754 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [17], [19], [21], [25], [29], [32], [34], [38], [41], [43], [48], [50], [54], [58], [62], [65], [67], [71], [73], [77], [81], [86], [96], [99], [101], [107], [108], [109], [111] [2018-10-22 15:56:10,757 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 15:56:10,758 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 15:56:17,008 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 15:56:17,008 INFO L272 AbstractInterpreter]: Visited 35 different actions 324 times. Merged at 17 different actions 224 times. Widened at 5 different actions 42 times. Found 16 fixpoints after 9 different actions. Largest state had 61 variables. [2018-10-22 15:56:17,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:56:17,014 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 15:56:17,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:17,015 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:56:17,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:56:17,033 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:56:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:56:17,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:56:17,383 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-22 15:56:17,384 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:56:17,826 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-22 15:56:17,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:17,860 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:56:17,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:56:17,885 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:56:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:56:18,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:56:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-22 15:56:18,272 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:56:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-22 15:56:18,326 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-10-22 15:56:18,327 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 5, 4] total 14 [2018-10-22 15:56:18,327 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:56:18,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 15:56:18,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 15:56:18,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:56:18,328 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 4 states. [2018-10-22 15:56:18,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:56:18,574 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2018-10-22 15:56:18,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:56:18,575 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2018-10-22 15:56:18,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:56:18,576 INFO L225 Difference]: With dead ends: 102 [2018-10-22 15:56:18,576 INFO L226 Difference]: Without dead ends: 68 [2018-10-22 15:56:18,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:56:18,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-22 15:56:18,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2018-10-22 15:56:18,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-22 15:56:18,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2018-10-22 15:56:18,604 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 55 [2018-10-22 15:56:18,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:56:18,605 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2018-10-22 15:56:18,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 15:56:18,605 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2018-10-22 15:56:18,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-22 15:56:18,607 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:56:18,607 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:56:18,607 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:56:18,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:56:18,608 INFO L82 PathProgramCache]: Analyzing trace with hash -39239389, now seen corresponding path program 2 times [2018-10-22 15:56:18,608 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:56:18,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:18,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:56:18,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:18,609 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:56:18,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:56:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2018-10-22 15:56:18,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:18,812 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:56:18,812 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:56:18,812 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:56:18,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:18,812 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:56:18,821 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:56:18,821 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:56:19,038 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:56:19,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:56:19,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:56:19,128 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2018-10-22 15:56:19,128 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:56:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2018-10-22 15:56:19,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:19,192 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:56:19,207 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:56:19,207 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:56:19,560 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:56:19,560 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:56:19,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:56:19,721 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-22 15:56:19,721 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:56:19,789 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-22 15:56:19,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:56:19,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 16 [2018-10-22 15:56:19,791 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:56:19,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 15:56:19,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 15:56:19,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:56:19,793 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 8 states. [2018-10-22 15:56:20,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:56:20,221 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2018-10-22 15:56:20,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:56:20,221 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2018-10-22 15:56:20,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:56:20,222 INFO L225 Difference]: With dead ends: 125 [2018-10-22 15:56:20,222 INFO L226 Difference]: Without dead ends: 77 [2018-10-22 15:56:20,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:56:20,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-22 15:56:20,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2018-10-22 15:56:20,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-22 15:56:20,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2018-10-22 15:56:20,246 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 59 [2018-10-22 15:56:20,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:56:20,247 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2018-10-22 15:56:20,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 15:56:20,247 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2018-10-22 15:56:20,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-22 15:56:20,248 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:56:20,248 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2018-10-22 15:56:20,249 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:56:20,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:56:20,249 INFO L82 PathProgramCache]: Analyzing trace with hash -348759238, now seen corresponding path program 3 times [2018-10-22 15:56:20,249 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:56:20,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:20,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:56:20,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:20,250 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:56:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:56:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2018-10-22 15:56:20,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:20,418 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:56:20,418 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:56:20,419 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:56:20,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:20,419 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:56:20,434 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:56:20,435 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 15:56:20,672 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-22 15:56:20,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:56:20,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:56:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-22 15:56:20,726 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:56:20,785 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-22 15:56:20,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:20,808 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:56:20,823 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:56:20,823 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 15:56:21,544 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-22 15:56:21,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:56:21,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:56:21,557 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-22 15:56:21,558 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:56:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-22 15:56:21,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:56:21,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 5, 5] total 13 [2018-10-22 15:56:21,582 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:56:21,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 15:56:21,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 15:56:21,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:56:21,584 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 10 states. [2018-10-22 15:56:22,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:56:22,202 INFO L93 Difference]: Finished difference Result 182 states and 220 transitions. [2018-10-22 15:56:22,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 15:56:22,203 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 63 [2018-10-22 15:56:22,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:56:22,205 INFO L225 Difference]: With dead ends: 182 [2018-10-22 15:56:22,205 INFO L226 Difference]: Without dead ends: 134 [2018-10-22 15:56:22,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:56:22,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-22 15:56:22,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 89. [2018-10-22 15:56:22,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-22 15:56:22,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2018-10-22 15:56:22,237 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 63 [2018-10-22 15:56:22,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:56:22,237 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2018-10-22 15:56:22,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 15:56:22,238 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2018-10-22 15:56:22,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-22 15:56:22,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:56:22,239 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:56:22,239 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:56:22,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:56:22,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1929547344, now seen corresponding path program 4 times [2018-10-22 15:56:22,240 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:56:22,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:22,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:56:22,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:22,241 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:56:22,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:56:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2018-10-22 15:56:22,387 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:22,387 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:56:22,387 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:56:22,387 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:56:22,387 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:22,387 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:56:22,396 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:56:22,396 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 15:56:22,451 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:56:22,451 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:56:22,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:56:22,547 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 24 proven. 60 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-10-22 15:56:22,547 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:56:22,642 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 24 proven. 60 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-10-22 15:56:22,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:22,664 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:56:22,681 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:56:22,681 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 15:56:22,791 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:56:22,791 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:56:22,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:56:22,809 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 24 proven. 60 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-10-22 15:56:22,809 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:56:22,865 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 24 proven. 60 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-10-22 15:56:22,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:56:22,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9, 9, 9] total 16 [2018-10-22 15:56:22,868 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:56:22,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:56:22,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:56:22,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:56:22,869 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand 13 states. [2018-10-22 15:56:23,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:56:23,713 INFO L93 Difference]: Finished difference Result 242 states and 289 transitions. [2018-10-22 15:56:23,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 15:56:23,714 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 84 [2018-10-22 15:56:23,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:56:23,715 INFO L225 Difference]: With dead ends: 242 [2018-10-22 15:56:23,716 INFO L226 Difference]: Without dead ends: 133 [2018-10-22 15:56:23,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 319 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:56:23,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-22 15:56:23,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 105. [2018-10-22 15:56:23,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-22 15:56:23,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2018-10-22 15:56:23,761 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 84 [2018-10-22 15:56:23,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:56:23,761 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2018-10-22 15:56:23,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:56:23,761 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2018-10-22 15:56:23,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-22 15:56:23,763 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:56:23,763 INFO L375 BasicCegarLoop]: trace histogram [12, 9, 9, 9, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:56:23,763 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:56:23,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:56:23,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1974053358, now seen corresponding path program 5 times [2018-10-22 15:56:23,764 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:56:23,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:23,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:56:23,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:23,765 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:56:23,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:56:24,047 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2018-10-22 15:56:24,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:24,048 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:56:24,048 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:56:24,048 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:56:24,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:24,048 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:56:24,059 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:56:24,059 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:56:24,112 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-22 15:56:24,112 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:56:24,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:56:24,153 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2018-10-22 15:56:24,153 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:56:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2018-10-22 15:56:24,237 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:56:24,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [8] total 10 [2018-10-22 15:56:24,237 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:56:24,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 15:56:24,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 15:56:24,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:56:24,238 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand 4 states. [2018-10-22 15:56:24,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:56:24,445 INFO L93 Difference]: Finished difference Result 197 states and 232 transitions. [2018-10-22 15:56:24,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:56:24,446 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2018-10-22 15:56:24,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:56:24,447 INFO L225 Difference]: With dead ends: 197 [2018-10-22 15:56:24,447 INFO L226 Difference]: Without dead ends: 105 [2018-10-22 15:56:24,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 197 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:56:24,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-22 15:56:24,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-22 15:56:24,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-22 15:56:24,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions. [2018-10-22 15:56:24,482 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 100 [2018-10-22 15:56:24,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:56:24,482 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 120 transitions. [2018-10-22 15:56:24,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 15:56:24,483 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions. [2018-10-22 15:56:24,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-22 15:56:24,484 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:56:24,484 INFO L375 BasicCegarLoop]: trace histogram [12, 9, 9, 9, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:56:24,486 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:56:24,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:56:24,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1326220240, now seen corresponding path program 6 times [2018-10-22 15:56:24,486 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:56:24,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:24,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:56:24,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:24,487 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:56:24,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:56:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2018-10-22 15:56:25,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:25,114 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:56:25,115 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:56:25,115 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:56:25,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:25,115 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:56:25,138 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:56:25,139 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 15:56:25,704 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-22 15:56:25,704 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:56:25,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:56:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-10-22 15:56:25,856 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:56:26,012 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-10-22 15:56:26,037 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:26,038 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:56:26,055 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:56:26,055 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 15:56:31,477 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-22 15:56:31,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:56:31,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:56:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-10-22 15:56:31,513 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:56:31,567 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-10-22 15:56:31,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:56:31,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 13 [2018-10-22 15:56:31,571 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:56:31,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-22 15:56:31,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-22 15:56:31,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:56:31,574 INFO L87 Difference]: Start difference. First operand 105 states and 120 transitions. Second operand 12 states. [2018-10-22 15:56:32,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:56:32,204 INFO L93 Difference]: Finished difference Result 258 states and 304 transitions. [2018-10-22 15:56:32,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 15:56:32,205 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 100 [2018-10-22 15:56:32,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:56:32,206 INFO L225 Difference]: With dead ends: 258 [2018-10-22 15:56:32,206 INFO L226 Difference]: Without dead ends: 177 [2018-10-22 15:56:32,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 386 SyntacticMatches, 8 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:56:32,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-22 15:56:32,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 143. [2018-10-22 15:56:32,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-22 15:56:32,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 166 transitions. [2018-10-22 15:56:32,256 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 166 transitions. Word has length 100 [2018-10-22 15:56:32,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:56:32,256 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 166 transitions. [2018-10-22 15:56:32,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-22 15:56:32,257 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 166 transitions. [2018-10-22 15:56:32,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-22 15:56:32,259 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:56:32,259 INFO L375 BasicCegarLoop]: trace histogram [20, 15, 15, 15, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:56:32,260 INFO L424 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:56:32,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:56:32,260 INFO L82 PathProgramCache]: Analyzing trace with hash 837643063, now seen corresponding path program 7 times [2018-10-22 15:56:32,260 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:56:32,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:32,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:56:32,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:32,262 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:56:32,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:56:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 210 proven. 18 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2018-10-22 15:56:32,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:32,610 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:56:32,611 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:56:32,611 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:56:32,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:32,611 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:56:32,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:56:32,620 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:56:32,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:56:32,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:56:32,817 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 210 proven. 18 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2018-10-22 15:56:32,818 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:56:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 210 proven. 18 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2018-10-22 15:56:32,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:32,962 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:56:33,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:56:33,007 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:56:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:56:33,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:56:33,293 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 210 proven. 18 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2018-10-22 15:56:33,294 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:56:33,328 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 210 proven. 18 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2018-10-22 15:56:33,332 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:56:33,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 16 [2018-10-22 15:56:33,333 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:56:33,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:56:33,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:56:33,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=137, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:56:33,334 INFO L87 Difference]: Start difference. First operand 143 states and 166 transitions. Second operand 11 states. [2018-10-22 15:56:33,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:56:33,757 INFO L93 Difference]: Finished difference Result 271 states and 327 transitions. [2018-10-22 15:56:33,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:56:33,758 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 138 [2018-10-22 15:56:33,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:56:33,760 INFO L225 Difference]: With dead ends: 271 [2018-10-22 15:56:33,760 INFO L226 Difference]: Without dead ends: 173 [2018-10-22 15:56:33,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=137, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:56:33,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-22 15:56:33,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 163. [2018-10-22 15:56:33,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-22 15:56:33,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 191 transitions. [2018-10-22 15:56:33,837 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 191 transitions. Word has length 138 [2018-10-22 15:56:33,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:56:33,838 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 191 transitions. [2018-10-22 15:56:33,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:56:33,838 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 191 transitions. [2018-10-22 15:56:33,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-22 15:56:33,841 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:56:33,841 INFO L375 BasicCegarLoop]: trace histogram [25, 20, 20, 20, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:56:33,841 INFO L424 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:56:33,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:56:33,842 INFO L82 PathProgramCache]: Analyzing trace with hash -539808240, now seen corresponding path program 8 times [2018-10-22 15:56:33,842 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:56:33,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:33,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:56:33,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:33,846 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:56:33,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:56:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 338 proven. 32 refuted. 0 times theorem prover too weak. 718 trivial. 0 not checked. [2018-10-22 15:56:34,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:34,633 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:56:34,633 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:56:34,634 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:56:34,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:34,634 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:56:34,657 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:56:34,658 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:56:35,185 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:56:35,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:56:35,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:56:35,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 338 proven. 32 refuted. 0 times theorem prover too weak. 718 trivial. 0 not checked. [2018-10-22 15:56:35,361 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:56:35,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 338 proven. 32 refuted. 0 times theorem prover too weak. 718 trivial. 0 not checked. [2018-10-22 15:56:35,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:35,583 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:56:35,602 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:56:35,603 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:56:36,285 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:56:36,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:56:36,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:56:36,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 338 proven. 32 refuted. 0 times theorem prover too weak. 718 trivial. 0 not checked. [2018-10-22 15:56:36,333 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:56:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 338 proven. 32 refuted. 0 times theorem prover too weak. 718 trivial. 0 not checked. [2018-10-22 15:56:36,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:56:36,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 19 [2018-10-22 15:56:36,366 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:56:36,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:56:36,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:56:36,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:56:36,367 INFO L87 Difference]: Start difference. First operand 163 states and 191 transitions. Second operand 13 states. [2018-10-22 15:56:36,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:56:36,735 INFO L93 Difference]: Finished difference Result 307 states and 372 transitions. [2018-10-22 15:56:36,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 15:56:36,736 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 158 [2018-10-22 15:56:36,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:56:36,739 INFO L225 Difference]: With dead ends: 307 [2018-10-22 15:56:36,739 INFO L226 Difference]: Without dead ends: 193 [2018-10-22 15:56:36,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 621 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:56:36,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-22 15:56:36,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 183. [2018-10-22 15:56:36,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-22 15:56:36,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 216 transitions. [2018-10-22 15:56:36,806 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 216 transitions. Word has length 158 [2018-10-22 15:56:36,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:56:36,807 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 216 transitions. [2018-10-22 15:56:36,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:56:36,807 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 216 transitions. [2018-10-22 15:56:36,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-22 15:56:36,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:56:36,810 INFO L375 BasicCegarLoop]: trace histogram [30, 25, 25, 25, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:56:36,811 INFO L424 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:56:36,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:56:36,811 INFO L82 PathProgramCache]: Analyzing trace with hash -448935319, now seen corresponding path program 9 times [2018-10-22 15:56:36,811 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:56:36,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:36,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:56:36,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:36,816 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:56:36,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:56:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1578 backedges. 498 proven. 50 refuted. 0 times theorem prover too weak. 1030 trivial. 0 not checked. [2018-10-22 15:56:37,074 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:37,075 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:56:37,075 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:56:37,075 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:56:37,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:37,075 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:56:37,083 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:56:37,084 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 15:56:37,922 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 15:56:37,922 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:56:37,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:56:38,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1578 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2018-10-22 15:56:38,031 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:56:38,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1578 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2018-10-22 15:56:38,197 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:38,197 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:56:38,216 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:56:38,216 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 15:56:40,486 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 15:56:40,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:56:40,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:56:40,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1578 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2018-10-22 15:56:40,543 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:56:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1578 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (18)] Exception during sending of exit command (exit): Broken pipe [2018-10-22 15:56:40,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:56:40,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7, 7, 7] total 18 [2018-10-22 15:56:40,646 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:56:40,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:56:40,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:56:40,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:56:40,648 INFO L87 Difference]: Start difference. First operand 183 states and 216 transitions. Second operand 13 states. [2018-10-22 15:56:42,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:56:42,011 INFO L93 Difference]: Finished difference Result 369 states and 448 transitions. [2018-10-22 15:56:42,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-22 15:56:42,012 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 178 [2018-10-22 15:56:42,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:56:42,015 INFO L225 Difference]: With dead ends: 369 [2018-10-22 15:56:42,016 INFO L226 Difference]: Without dead ends: 239 [2018-10-22 15:56:42,018 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 703 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=739, Invalid=1423, Unknown=0, NotChecked=0, Total=2162 [2018-10-22 15:56:42,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-10-22 15:56:42,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 207. [2018-10-22 15:56:42,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-10-22 15:56:42,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 245 transitions. [2018-10-22 15:56:42,102 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 245 transitions. Word has length 178 [2018-10-22 15:56:42,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:56:42,102 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 245 transitions. [2018-10-22 15:56:42,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:56:42,103 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 245 transitions. [2018-10-22 15:56:42,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-22 15:56:42,105 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:56:42,105 INFO L375 BasicCegarLoop]: trace histogram [35, 30, 30, 30, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:56:42,105 INFO L424 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:56:42,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:56:42,106 INFO L82 PathProgramCache]: Analyzing trace with hash -108228421, now seen corresponding path program 10 times [2018-10-22 15:56:42,106 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:56:42,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:42,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:56:42,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:42,107 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:56:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:56:42,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2182 backedges. 690 proven. 72 refuted. 0 times theorem prover too weak. 1420 trivial. 0 not checked. [2018-10-22 15:56:42,608 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:42,608 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:56:42,608 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:56:42,609 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:56:42,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:42,609 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:56:42,617 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:56:42,618 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 15:56:42,788 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:56:42,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:56:42,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:56:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2182 backedges. 60 proven. 630 refuted. 0 times theorem prover too weak. 1492 trivial. 0 not checked. [2018-10-22 15:56:44,461 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:56:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2182 backedges. 60 proven. 630 refuted. 0 times theorem prover too weak. 1492 trivial. 0 not checked. [2018-10-22 15:56:44,663 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:44,663 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:56:44,681 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:56:44,682 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 15:56:45,060 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:56:45,060 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:56:45,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:56:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2182 backedges. 60 proven. 630 refuted. 0 times theorem prover too weak. 1492 trivial. 0 not checked. [2018-10-22 15:56:45,130 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:56:45,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2182 backedges. 60 proven. 630 refuted. 0 times theorem prover too weak. 1492 trivial. 0 not checked. [2018-10-22 15:56:45,339 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:56:45,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14, 14, 14] total 29 [2018-10-22 15:56:45,340 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:56:45,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-22 15:56:45,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-22 15:56:45,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:56:45,342 INFO L87 Difference]: Start difference. First operand 207 states and 245 transitions. Second operand 22 states. [2018-10-22 15:56:48,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:56:48,080 INFO L93 Difference]: Finished difference Result 453 states and 552 transitions. [2018-10-22 15:56:48,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-22 15:56:48,081 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 202 [2018-10-22 15:56:48,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:56:48,084 INFO L225 Difference]: With dead ends: 453 [2018-10-22 15:56:48,084 INFO L226 Difference]: Without dead ends: 303 [2018-10-22 15:56:48,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 873 GetRequests, 784 SyntacticMatches, 10 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1843 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1487, Invalid=4993, Unknown=0, NotChecked=0, Total=6480 [2018-10-22 15:56:48,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-10-22 15:56:48,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 231. [2018-10-22 15:56:48,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-10-22 15:56:48,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 274 transitions. [2018-10-22 15:56:48,240 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 274 transitions. Word has length 202 [2018-10-22 15:56:48,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:56:48,240 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 274 transitions. [2018-10-22 15:56:48,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-22 15:56:48,241 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 274 transitions. [2018-10-22 15:56:48,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-10-22 15:56:48,243 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:56:48,243 INFO L375 BasicCegarLoop]: trace histogram [40, 35, 35, 35, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:56:48,244 INFO L424 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:56:48,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:56:48,244 INFO L82 PathProgramCache]: Analyzing trace with hash 759915277, now seen corresponding path program 11 times [2018-10-22 15:56:48,244 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:56:48,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:48,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:56:48,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:48,246 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:56:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:56:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2890 backedges. 914 proven. 98 refuted. 0 times theorem prover too weak. 1878 trivial. 0 not checked. [2018-10-22 15:56:48,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:48,985 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:56:48,986 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:56:48,986 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:56:48,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:48,986 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:56:48,995 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:56:48,996 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:56:50,425 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2018-10-22 15:56:50,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:56:50,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:56:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2890 backedges. 1628 proven. 98 refuted. 0 times theorem prover too weak. 1164 trivial. 0 not checked. [2018-10-22 15:56:50,622 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:56:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2890 backedges. 1420 proven. 318 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2018-10-22 15:56:51,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:51,186 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:56:51,210 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:56:51,211 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:57:43,985 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2018-10-22 15:57:43,986 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:57:44,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:57:44,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2890 backedges. 1602 proven. 98 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2018-10-22 15:57:44,105 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:57:44,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2890 backedges. 1376 proven. 324 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2018-10-22 15:57:44,167 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:57:44,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 14, 11, 11] total 33 [2018-10-22 15:57:44,168 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:57:44,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 15:57:44,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 15:57:44,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=611, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:57:44,171 INFO L87 Difference]: Start difference. First operand 231 states and 274 transitions. Second operand 21 states. [2018-10-22 15:57:44,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:57:44,490 INFO L93 Difference]: Finished difference Result 441 states and 538 transitions. [2018-10-22 15:57:44,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 15:57:44,491 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 226 [2018-10-22 15:57:44,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:57:44,493 INFO L225 Difference]: With dead ends: 441 [2018-10-22 15:57:44,493 INFO L226 Difference]: Without dead ends: 271 [2018-10-22 15:57:44,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 913 GetRequests, 882 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=445, Invalid=611, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:57:44,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-10-22 15:57:44,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-10-22 15:57:44,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-10-22 15:57:44,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 324 transitions. [2018-10-22 15:57:44,577 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 324 transitions. Word has length 226 [2018-10-22 15:57:44,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:57:44,577 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 324 transitions. [2018-10-22 15:57:44,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 15:57:44,577 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 324 transitions. [2018-10-22 15:57:44,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-10-22 15:57:44,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:57:44,580 INFO L375 BasicCegarLoop]: trace histogram [50, 45, 45, 45, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:57:44,580 INFO L424 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:57:44,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:57:44,580 INFO L82 PathProgramCache]: Analyzing trace with hash 737754175, now seen corresponding path program 12 times [2018-10-22 15:57:44,581 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:57:44,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:57:44,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:57:44,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:57:44,582 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:57:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:57:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4570 backedges. 1458 proven. 162 refuted. 0 times theorem prover too weak. 2950 trivial. 0 not checked. [2018-10-22 15:57:44,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:57:44,929 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:57:44,929 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:57:44,929 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:57:44,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:57:44,929 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:57:44,938 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:57:44,939 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 15:57:46,521 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-22 15:57:46,522 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:57:46,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:57:46,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4570 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 4520 trivial. 0 not checked. [2018-10-22 15:57:46,837 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:57:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4570 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 4520 trivial. 0 not checked. [2018-10-22 15:57:47,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:57:47,116 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 24 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:57:47,134 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:57:47,135 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 15:58:07,596 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-22 15:58:07,597 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:58:07,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:58:07,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4570 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 4520 trivial. 0 not checked. [2018-10-22 15:58:07,690 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:58:07,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4570 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 4520 trivial. 0 not checked. [2018-10-22 15:58:07,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:58:07,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9, 9, 9] total 26 [2018-10-22 15:58:07,827 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:58:07,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 15:58:07,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 15:58:07,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:58:07,828 INFO L87 Difference]: Start difference. First operand 271 states and 324 transitions. Second operand 19 states. [2018-10-22 15:58:11,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:58:11,977 INFO L93 Difference]: Finished difference Result 639 states and 784 transitions. [2018-10-22 15:58:11,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-22 15:58:11,977 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 266 [2018-10-22 15:58:11,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:58:11,979 INFO L225 Difference]: With dead ends: 639 [2018-10-22 15:58:11,980 INFO L226 Difference]: Without dead ends: 437 [2018-10-22 15:58:11,983 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1144 GetRequests, 1051 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2631 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2860, Invalid=6070, Unknown=0, NotChecked=0, Total=8930 [2018-10-22 15:58:11,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2018-10-22 15:58:12,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 295. [2018-10-22 15:58:12,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-10-22 15:58:12,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 353 transitions. [2018-10-22 15:58:12,069 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 353 transitions. Word has length 266 [2018-10-22 15:58:12,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:58:12,069 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 353 transitions. [2018-10-22 15:58:12,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 15:58:12,069 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 353 transitions. [2018-10-22 15:58:12,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-10-22 15:58:12,071 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:58:12,071 INFO L375 BasicCegarLoop]: trace histogram [55, 50, 50, 50, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:58:12,071 INFO L424 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:58:12,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:58:12,072 INFO L82 PathProgramCache]: Analyzing trace with hash 843621521, now seen corresponding path program 13 times [2018-10-22 15:58:12,072 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:58:12,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:58:12,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:58:12,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:58:12,073 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:58:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:58:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5582 backedges. 1778 proven. 200 refuted. 0 times theorem prover too weak. 3604 trivial. 0 not checked. [2018-10-22 15:58:12,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:58:12,434 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:58:12,435 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:58:12,435 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:58:12,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:58:12,435 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:58:12,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:58:12,445 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:58:12,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:58:12,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:58:13,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5582 backedges. 1778 proven. 200 refuted. 0 times theorem prover too weak. 3604 trivial. 0 not checked. [2018-10-22 15:58:13,012 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:58:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5582 backedges. 1778 proven. 200 refuted. 0 times theorem prover too weak. 3604 trivial. 0 not checked. [2018-10-22 15:58:13,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:58:13,767 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 26 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:58:13,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:58:13,784 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:58:14,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:58:14,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:58:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5582 backedges. 1778 proven. 200 refuted. 0 times theorem prover too weak. 3604 trivial. 0 not checked. [2018-10-22 15:58:14,454 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:58:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5582 backedges. 1778 proven. 200 refuted. 0 times theorem prover too weak. 3604 trivial. 0 not checked. [2018-10-22 15:58:14,616 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:58:14,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14] total 35 [2018-10-22 15:58:14,616 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:58:14,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-22 15:58:14,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-22 15:58:14,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=678, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:58:14,618 INFO L87 Difference]: Start difference. First operand 295 states and 353 transitions. Second operand 25 states. [2018-10-22 15:58:15,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:58:15,449 INFO L93 Difference]: Finished difference Result 547 states and 666 transitions. [2018-10-22 15:58:15,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 15:58:15,450 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 290 [2018-10-22 15:58:15,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:58:15,452 INFO L225 Difference]: With dead ends: 547 [2018-10-22 15:58:15,452 INFO L226 Difference]: Without dead ends: 325 [2018-10-22 15:58:15,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1172 GetRequests, 1135 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=512, Invalid=678, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:58:15,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2018-10-22 15:58:15,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 315. [2018-10-22 15:58:15,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-10-22 15:58:15,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 378 transitions. [2018-10-22 15:58:15,531 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 378 transitions. Word has length 290 [2018-10-22 15:58:15,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:58:15,531 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 378 transitions. [2018-10-22 15:58:15,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-22 15:58:15,531 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 378 transitions. [2018-10-22 15:58:15,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-10-22 15:58:15,533 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:58:15,533 INFO L375 BasicCegarLoop]: trace histogram [60, 55, 55, 55, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:58:15,533 INFO L424 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:58:15,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:58:15,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1727421546, now seen corresponding path program 14 times [2018-10-22 15:58:15,534 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:58:15,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:58:15,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:58:15,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:58:15,535 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:58:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:58:16,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6672 backedges. 2130 proven. 242 refuted. 0 times theorem prover too weak. 4300 trivial. 0 not checked. [2018-10-22 15:58:16,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:58:16,541 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:58:16,542 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:58:16,542 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:58:16,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:58:16,542 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:58:16,557 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:58:16,557 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:58:16,976 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:58:16,976 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:58:16,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:58:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6672 backedges. 2130 proven. 242 refuted. 0 times theorem prover too weak. 4300 trivial. 0 not checked. [2018-10-22 15:58:17,217 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:58:17,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6672 backedges. 2130 proven. 242 refuted. 0 times theorem prover too weak. 4300 trivial. 0 not checked. [2018-10-22 15:58:17,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:58:17,562 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 28 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:58:17,578 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:58:17,579 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:58:18,480 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:58:18,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:58:18,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:58:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6672 backedges. 2130 proven. 242 refuted. 0 times theorem prover too weak. 4300 trivial. 0 not checked. [2018-10-22 15:58:18,590 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:58:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6672 backedges. 2130 proven. 242 refuted. 0 times theorem prover too weak. 4300 trivial. 0 not checked. [2018-10-22 15:58:18,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:58:18,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 15] total 36 [2018-10-22 15:58:18,792 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:58:18,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-22 15:58:18,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-22 15:58:18,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=723, Unknown=0, NotChecked=0, Total=1260 [2018-10-22 15:58:18,794 INFO L87 Difference]: Start difference. First operand 315 states and 378 transitions. Second operand 27 states. [2018-10-22 15:58:19,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:58:19,833 INFO L93 Difference]: Finished difference Result 583 states and 711 transitions. [2018-10-22 15:58:19,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 15:58:19,836 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 310 [2018-10-22 15:58:19,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:58:19,837 INFO L225 Difference]: With dead ends: 583 [2018-10-22 15:58:19,837 INFO L226 Difference]: Without dead ends: 345 [2018-10-22 15:58:19,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1253 GetRequests, 1211 SyntacticMatches, 8 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=537, Invalid=723, Unknown=0, NotChecked=0, Total=1260 [2018-10-22 15:58:19,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2018-10-22 15:58:19,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 335. [2018-10-22 15:58:19,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-10-22 15:58:19,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 403 transitions. [2018-10-22 15:58:19,922 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 403 transitions. Word has length 310 [2018-10-22 15:58:19,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:58:19,922 INFO L481 AbstractCegarLoop]: Abstraction has 335 states and 403 transitions. [2018-10-22 15:58:19,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-22 15:58:19,922 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 403 transitions. [2018-10-22 15:58:19,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-10-22 15:58:19,924 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:58:19,924 INFO L375 BasicCegarLoop]: trace histogram [65, 60, 60, 60, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:58:19,924 INFO L424 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:58:19,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:58:19,925 INFO L82 PathProgramCache]: Analyzing trace with hash -908497469, now seen corresponding path program 15 times [2018-10-22 15:58:19,925 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:58:19,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:58:19,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:58:19,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:58:19,926 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:58:19,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:58:20,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7862 backedges. 2514 proven. 288 refuted. 0 times theorem prover too weak. 5060 trivial. 0 not checked. [2018-10-22 15:58:20,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:58:20,689 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:58:20,689 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:58:20,689 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:58:20,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:58:20,690 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:58:20,699 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:58:20,700 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 15:58:21,373 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-22 15:58:21,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:58:21,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:58:21,648 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-22 15:58:21,653 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-22 15:58:21,654 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:58:21,669 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:58:21,684 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:58:21,684 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2018-10-22 15:58:21,742 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2018-10-22 15:58:21,745 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:58:21,747 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 23 [2018-10-22 15:58:21,747 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:58:21,752 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:58:21,823 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:58:21,824 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:17 [2018-10-22 15:58:21,850 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2018-10-22 15:58:21,897 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 22 [2018-10-22 15:58:21,899 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-22 15:58:21,911 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-10-22 15:58:21,935 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-10-22 15:58:21,936 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:35, output treesize:33 [2018-10-22 15:58:22,061 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 28 [2018-10-22 15:58:22,064 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-10-22 15:58:22,064 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:58:22,075 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:58:22,120 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 30 [2018-10-22 15:58:22,132 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 22 [2018-10-22 15:58:22,133 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2018-10-22 15:58:22,155 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-10-22 15:58:22,203 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 3 xjuncts. [2018-10-22 15:58:22,204 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:67, output treesize:46 [2018-10-22 15:58:22,415 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 31 [2018-10-22 15:58:22,418 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:58:22,419 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 27 [2018-10-22 15:58:22,420 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:58:22,434 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:58:22,471 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 26 [2018-10-22 15:58:22,477 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-22 15:58:22,477 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-22 15:58:22,487 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:58:22,515 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-10-22 15:58:22,516 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:40 [2018-10-22 15:58:22,724 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2018-10-22 15:58:22,726 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2018-10-22 15:58:22,727 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:58:22,729 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:58:22,730 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:58:22,730 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2018-10-22 15:58:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7862 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2018-10-22 15:58:23,103 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:58:37,767 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2018-10-22 15:58:37,780 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 39 [2018-10-22 15:58:37,806 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:37,831 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 54 [2018-10-22 15:58:37,860 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:37,980 INFO L303 Elim1Store]: Index analysis took 147 ms [2018-10-22 15:58:38,245 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 76 [2018-10-22 15:58:38,278 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:38,397 INFO L303 Elim1Store]: Index analysis took 148 ms [2018-10-22 15:58:38,638 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 55 treesize of output 89 [2018-10-22 15:58:39,033 WARN L179 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2018-10-22 15:58:39,059 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:39,060 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:39,061 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:39,070 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 64 [2018-10-22 15:58:39,073 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2018-10-22 15:58:39,079 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:39,081 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 37 [2018-10-22 15:58:39,082 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-10-22 15:58:39,131 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:39,145 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:39,179 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:39,194 INFO L303 Elim1Store]: Index analysis took 111 ms [2018-10-22 15:58:39,199 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 64 [2018-10-22 15:58:39,200 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2018-10-22 15:58:39,425 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:39,443 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 69 [2018-10-22 15:58:39,445 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 4 xjuncts. [2018-10-22 15:58:39,449 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:39,451 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 37 [2018-10-22 15:58:39,451 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-10-22 15:58:39,644 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:39,649 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:39,653 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:39,685 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 98 [2018-10-22 15:58:39,691 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 12 xjuncts. [2018-10-22 15:58:39,696 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:39,714 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 58 [2018-10-22 15:58:39,716 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 4 xjuncts. [2018-10-22 15:58:39,968 INFO L267 ElimStorePlain]: Start of recursive call 6: 3 dim-1 vars, End of recursive call: and 9 xjuncts. [2018-10-22 15:58:40,274 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:40,305 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 77 [2018-10-22 15:58:40,477 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2018-10-22 15:58:40,484 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:40,502 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 70 [2018-10-22 15:58:40,505 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 4 xjuncts. [2018-10-22 15:58:40,507 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:40,509 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 36 [2018-10-22 15:58:40,510 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2018-10-22 15:58:40,518 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:40,536 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 70 [2018-10-22 15:58:40,538 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 4 xjuncts. [2018-10-22 15:58:40,745 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:40,784 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 101 [2018-10-22 15:58:40,792 INFO L267 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 32 xjuncts. [2018-10-22 15:58:40,798 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:40,817 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 57 [2018-10-22 15:58:40,819 INFO L267 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 4 xjuncts. [2018-10-22 15:58:41,302 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 33 [2018-10-22 15:58:41,303 INFO L267 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 2 xjuncts. [2018-10-22 15:58:41,309 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:41,328 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 68 [2018-10-22 15:58:41,331 INFO L267 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 4 xjuncts. [2018-10-22 15:58:41,634 INFO L267 ElimStorePlain]: Start of recursive call 14: 3 dim-1 vars, End of recursive call: and 9 xjuncts. [2018-10-22 15:58:41,906 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:41,967 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 8 case distinctions, treesize of input 45 treesize of output 109 [2018-10-22 15:58:43,505 WARN L179 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 467 DAG size of output: 335 [2018-10-22 15:58:43,520 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:43,521 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:43,524 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:43,528 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:43,530 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:43,536 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:58:43,560 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 79 [2018-10-22 15:58:43,561 INFO L267 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 3 xjuncts. [2018-10-22 15:58:43,606 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:43,615 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:58:43,629 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 49 [2018-10-22 15:58:43,629 INFO L267 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 2 xjuncts. [2018-10-22 15:58:43,634 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:43,635 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:43,637 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:43,641 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:43,642 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:43,647 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:58:43,732 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 79 [2018-10-22 15:58:43,735 INFO L267 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 3 xjuncts. [2018-10-22 15:58:46,154 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:46,173 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 68 [2018-10-22 15:58:46,175 INFO L267 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 4 xjuncts. [2018-10-22 15:58:46,178 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:46,181 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 36 [2018-10-22 15:58:46,182 INFO L267 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2018-10-22 15:58:47,992 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:47,997 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:58:48,005 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 48 [2018-10-22 15:58:48,006 INFO L267 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 2 xjuncts. [2018-10-22 15:58:48,015 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:48,015 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:48,017 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:48,022 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:48,023 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:48,027 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:58:48,043 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 77 [2018-10-22 15:58:48,045 INFO L267 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 3 xjuncts. [2018-10-22 15:58:50,174 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:50,181 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:58:50,203 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 69 [2018-10-22 15:58:50,204 INFO L267 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 4 xjuncts. [2018-10-22 15:58:50,209 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:50,211 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:50,219 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:50,222 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:50,224 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:50,231 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:58:50,263 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 58 treesize of output 102 [2018-10-22 15:58:50,269 INFO L267 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 14 xjuncts. [2018-10-22 15:58:52,484 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:52,489 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:58:52,490 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2018-10-22 15:58:52,491 INFO L267 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2018-10-22 15:58:52,503 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:52,514 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:58:52,537 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 86 [2018-10-22 15:58:52,539 INFO L267 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 4 xjuncts. [2018-10-22 15:58:54,594 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:54,610 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 61 [2018-10-22 15:58:54,611 INFO L267 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 4 xjuncts. [2018-10-22 15:58:54,623 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:54,624 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:54,626 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:54,632 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:54,658 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 90 [2018-10-22 15:58:54,660 INFO L267 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 6 xjuncts. [2018-10-22 15:58:56,624 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:56,628 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:56,629 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:56,637 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:56,661 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 89 [2018-10-22 15:58:56,664 INFO L267 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 8 xjuncts. [2018-10-22 15:58:56,711 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:56,724 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:56,742 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 59 [2018-10-22 15:58:56,743 INFO L267 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 2 xjuncts. [2018-10-22 15:58:58,758 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:58,813 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 95 [2018-10-22 15:58:58,817 INFO L267 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 16 xjuncts. [2018-10-22 15:58:58,855 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:58:58,894 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 51 [2018-10-22 15:58:58,895 INFO L267 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 2 xjuncts. [2018-10-22 15:59:00,773 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:00,775 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:00,780 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:00,812 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 97 [2018-10-22 15:59:00,816 INFO L267 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 14 xjuncts. [2018-10-22 15:59:00,820 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:00,839 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 57 [2018-10-22 15:59:00,840 INFO L267 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 4 xjuncts. [2018-10-22 15:59:04,184 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:59:04,198 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 44 [2018-10-22 15:59:04,199 INFO L267 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 2 xjuncts. [2018-10-22 15:59:04,206 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:04,207 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:04,208 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:04,213 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:04,214 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:04,218 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:59:04,225 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 73 [2018-10-22 15:59:04,226 INFO L267 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 2 xjuncts. [2018-10-22 15:59:05,628 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:05,634 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:59:05,664 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 73 [2018-10-22 15:59:05,666 INFO L267 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 8 xjuncts. [2018-10-22 15:59:05,674 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:05,684 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:05,690 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:05,696 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:59:05,808 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 50 treesize of output 111 [2018-10-22 15:59:05,809 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2018-10-22 15:59:05,815 INFO L267 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 20 xjuncts. [2018-10-22 15:59:07,200 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:07,201 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:07,207 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:07,232 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 91 [2018-10-22 15:59:07,235 INFO L267 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 7 xjuncts. [2018-10-22 15:59:07,258 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:07,270 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 51 [2018-10-22 15:59:07,271 INFO L267 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 2 xjuncts. [2018-10-22 15:59:08,336 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:08,346 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:08,351 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:08,412 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 8 case distinctions, treesize of input 46 treesize of output 120 [2018-10-22 15:59:08,413 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2018-10-22 15:59:08,455 INFO L267 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 176 xjuncts. [2018-10-22 15:59:08,524 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:08,564 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 82 [2018-10-22 15:59:08,568 INFO L267 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 32 xjuncts. [2018-10-22 15:59:12,344 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:12,344 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:12,345 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:12,345 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:12,347 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:12,365 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 88 [2018-10-22 15:59:12,368 INFO L267 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 4 xjuncts. [2018-10-22 15:59:12,373 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:12,389 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 64 [2018-10-22 15:59:12,391 INFO L267 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 4 xjuncts. [2018-10-22 15:59:14,463 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 32 [2018-10-22 15:59:14,464 INFO L267 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 2 xjuncts. [2018-10-22 15:59:14,470 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:14,471 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:14,473 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:14,483 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 67 [2018-10-22 15:59:14,485 INFO L267 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 2 xjuncts. [2018-10-22 15:59:15,106 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:15,108 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 36 [2018-10-22 15:59:15,109 INFO L267 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2018-10-22 15:59:15,115 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:15,115 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:15,118 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:59:15,128 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 63 [2018-10-22 15:59:15,129 INFO L267 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 2 xjuncts. [2018-10-22 15:59:16,036 INFO L267 ElimStorePlain]: Start of recursive call 22: 20 dim-1 vars, End of recursive call: and 20 xjuncts. [2018-10-22 15:59:16,473 INFO L267 ElimStorePlain]: Start of recursive call 5: 4 dim-1 vars, End of recursive call: and 16 xjuncts. [2018-10-22 15:59:16,782 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 12 xjuncts. [2018-10-22 15:59:16,974 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 12 xjuncts. [2018-10-22 15:59:17,159 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 12 xjuncts. [2018-10-22 15:59:17,405 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 1 dim-2 vars, End of recursive call: and 9 xjuncts. [2018-10-22 15:59:17,405 INFO L202 ElimStorePlain]: Needed 55 recursive calls to eliminate 12 variables, input treesize:82, output treesize:760 [2018-10-22 15:59:17,693 WARN L179 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 24 [2018-10-22 15:59:17,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7862 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2018-10-22 15:59:17,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:59:17,968 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 30 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:59:17,983 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:59:17,983 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 15:59:28,917 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-22 15:59:28,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:59:28,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:59:28,988 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-22 15:59:28,994 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-22 15:59:28,995 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:59:28,996 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:59:29,002 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:59:29,003 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2018-10-22 15:59:29,082 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2018-10-22 15:59:29,086 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:59:29,087 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 19 [2018-10-22 15:59:29,087 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:59:29,094 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:59:29,105 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:59:29,106 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:32, output treesize:11 [2018-10-22 15:59:29,141 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2018-10-22 15:59:29,153 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 19 [2018-10-22 15:59:29,154 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-22 15:59:29,168 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-10-22 15:59:29,186 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-10-22 15:59:29,187 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:21 [2018-10-22 15:59:29,284 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2018-10-22 15:59:29,295 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 19 [2018-10-22 15:59:29,296 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-22 15:59:29,316 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-10-22 15:59:29,378 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 22 [2018-10-22 15:59:29,384 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-10-22 15:59:29,385 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-22 15:59:29,398 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:59:29,442 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 3 xjuncts. [2018-10-22 15:59:29,443 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:55, output treesize:28 [2018-10-22 15:59:29,608 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2018-10-22 15:59:29,621 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 19 [2018-10-22 15:59:29,621 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-22 15:59:29,637 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-10-22 15:59:29,677 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 22 [2018-10-22 15:59:29,681 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-10-22 15:59:29,681 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-22 15:59:29,687 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:59:29,718 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 3 xjuncts. [2018-10-22 15:59:29,718 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:55, output treesize:28 [2018-10-22 15:59:29,910 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2018-10-22 15:59:29,926 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2018-10-22 15:59:29,927 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:59:29,951 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:59:29,962 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:59:29,963 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2018-10-22 15:59:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7862 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2018-10-22 15:59:30,132 INFO L316 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2018-10-22 16:00:07,205 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-22 16:00:07,406 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:00:07,406 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-22 16:00:07,413 WARN L205 ceAbstractionStarter]: Timeout [2018-10-22 16:00:07,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 04:00:07 BoogieIcfgContainer [2018-10-22 16:00:07,413 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 16:00:07,414 INFO L168 Benchmark]: Toolchain (without parser) took 250951.66 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 3.0 GB in the end (delta: -1.6 GB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. [2018-10-22 16:00:07,415 INFO L168 Benchmark]: CDTParser took 0.21 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. [2018-10-22 16:00:07,415 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.42 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-22 16:00:07,416 INFO L168 Benchmark]: Boogie Procedure Inliner took 100.85 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 16:00:07,416 INFO L168 Benchmark]: Boogie Preprocessor took 101.68 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-22 16:00:07,416 INFO L168 Benchmark]: RCFGBuilder took 1424.17 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 789.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -741.0 MB). Peak memory consumption was 61.8 MB. Max. memory is 7.1 GB. [2018-10-22 16:00:07,417 INFO L168 Benchmark]: TraceAbstraction took 248981.10 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.8 GB). Free memory was 2.2 GB in the beginning and 3.0 GB in the end (delta: -870.7 MB). Peak memory consumption was 957.0 MB. Max. memory is 7.1 GB. [2018-10-22 16:00:07,419 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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 337.42 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 100.85 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 101.68 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1424.17 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 789.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -741.0 MB). Peak memory consumption was 61.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 248981.10 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.8 GB). Free memory was 2.2 GB in the beginning and 3.0 GB in the end (delta: -870.7 MB). Peak memory consumption was 957.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was analyzing trace of length 331 with TraceHistMax 65,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 40 locations, 1 error locations. TIMEOUT Result, 248.9s OverallTime, 20 OverallIterations, 65 TraceHistogramMax, 19.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 653 SDtfs, 3664 SDslu, 2807 SDs, 0 SdLazy, 1793 SolverSat, 847 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.1s Time, PredicateUnifierStatistics: 6 DeclaredPredicates, 9108 GetRequests, 8600 SyntacticMatches, 42 SemanticMatches, 466 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7624 ImplicationChecksByTransitivity, 18.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=335occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 9.4s AbstIntTime, 4 AbstIntIterations, 3 AbstIntStrong, 0.971423796791444 AbsIntWeakeningRatio, 1.803921568627451 AbsIntAvgWeakeningVarsNumRemoved, 205.69607843137254 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 19 MinimizatonAttempts, 433 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 91.1s SatisfiabilityAnalysisTime, 15.5s InterpolantComputationTime, 6731 NumberOfCodeBlocks, 6062 NumberOfCodeBlocksAsserted, 160 NumberOfCheckSat, 11016 ConstructedInterpolants, 0 QuantifiedInterpolants, 5039687 SizeOfPredicates, 66 NumberOfNonLiveVariables, 18119 ConjunctsInSsa, 219 ConjunctsInUnsatCore, 73 InterpolantComputations, 5 PerfectInterpolantSequences, 122403/129977 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown