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-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label51_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 08:36:56,790 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 08:36:56,793 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 08:36:56,808 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 08:36:56,809 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 08:36:56,811 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 08:36:56,814 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 08:36:56,816 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 08:36:56,818 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 08:36:56,819 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 08:36:56,820 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 08:36:56,820 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 08:36:56,821 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 08:36:56,822 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 08:36:56,831 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 08:36:56,832 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 08:36:56,835 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 08:36:56,837 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 08:36:56,841 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 08:36:56,847 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 08:36:56,849 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 08:36:56,852 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 08:36:56,856 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-27 08:36:56,867 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-27 08:36:56,886 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 08:36:56,886 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 08:36:56,887 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 08:36:56,887 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 08:36:56,887 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 08:36:56,887 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 08:36:56,888 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-27 08:36:56,888 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 08:36:56,888 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 08:36:56,888 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 08:36:56,888 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 08:36:56,888 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 08:36:56,889 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 08:36:56,889 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 08:36:56,890 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 08:36:56,890 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 08:36:56,890 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 08:36:56,890 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 08:36:56,890 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 08:36:56,890 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 08:36:56,891 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 08:36:56,891 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 08:36:56,891 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 08:36:56,891 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 08:36:56,891 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 08:36:56,892 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 08:36:56,892 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 08:36:56,892 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 08:36:56,892 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 08:36:56,892 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 08:36:56,893 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 08:36:56,893 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 08:36:56,893 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 08:36:56,893 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 08:36:56,893 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 08:36:56,894 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 08:36:56,942 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 08:36:56,954 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 08:36:56,957 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 08:36:56,958 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 08:36:56,959 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 08:36:56,960 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label51_true-unreach-call.c [2018-10-27 08:36:57,022 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/6e60a7bac/56faef0e4d764b3a928b1138767dfb6d/FLAGb471578f8 [2018-10-27 08:36:57,747 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 08:36:57,748 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label51_true-unreach-call.c [2018-10-27 08:36:57,777 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/6e60a7bac/56faef0e4d764b3a928b1138767dfb6d/FLAGb471578f8 [2018-10-27 08:36:57,796 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/6e60a7bac/56faef0e4d764b3a928b1138767dfb6d [2018-10-27 08:36:57,811 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 08:36:57,813 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 08:36:57,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 08:36:57,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 08:36:57,821 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 08:36:57,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:36:57" (1/1) ... [2018-10-27 08:36:57,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@379aca2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:57, skipping insertion in model container [2018-10-27 08:36:57,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:36:57" (1/1) ... [2018-10-27 08:36:57,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 08:36:57,969 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 08:36:58,917 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 08:36:58,921 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 08:36:59,348 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 08:36:59,371 INFO L193 MainTranslator]: Completed translation [2018-10-27 08:36:59,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:59 WrapperNode [2018-10-27 08:36:59,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 08:36:59,373 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 08:36:59,374 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 08:36:59,374 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 08:36:59,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:59" (1/1) ... [2018-10-27 08:36:59,437 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:59" (1/1) ... [2018-10-27 08:36:59,826 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 08:36:59,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 08:36:59,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 08:36:59,827 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 08:36:59,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:59" (1/1) ... [2018-10-27 08:36:59,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:59" (1/1) ... [2018-10-27 08:36:59,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:59" (1/1) ... [2018-10-27 08:36:59,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:59" (1/1) ... [2018-10-27 08:36:59,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:59" (1/1) ... [2018-10-27 08:36:59,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:59" (1/1) ... [2018-10-27 08:37:00,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:59" (1/1) ... [2018-10-27 08:37:00,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 08:37:00,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 08:37:00,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 08:37:00,100 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 08:37:00,101 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 08:37:00,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 08:37:00,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 08:37:00,169 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 08:37:00,170 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 08:37:00,171 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 08:37:00,171 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 08:37:00,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 08:37:00,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 08:37:00,171 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 08:37:00,172 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 08:37:11,419 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 08:37:11,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:37:11 BoogieIcfgContainer [2018-10-27 08:37:11,420 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 08:37:11,422 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 08:37:11,422 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 08:37:11,426 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 08:37:11,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:36:57" (1/3) ... [2018-10-27 08:37:11,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46dc5ad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:37:11, skipping insertion in model container [2018-10-27 08:37:11,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:59" (2/3) ... [2018-10-27 08:37:11,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46dc5ad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:37:11, skipping insertion in model container [2018-10-27 08:37:11,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:37:11" (3/3) ... [2018-10-27 08:37:11,430 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label51_true-unreach-call.c [2018-10-27 08:37:11,440 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 08:37:11,450 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 08:37:11,468 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 08:37:11,512 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 08:37:11,512 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 08:37:11,513 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 08:37:11,513 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 08:37:11,513 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 08:37:11,513 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 08:37:11,513 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 08:37:11,514 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 08:37:11,548 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-27 08:37:11,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-27 08:37:11,557 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:37:11,559 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:37:11,561 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:37:11,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:37:11,568 INFO L82 PathProgramCache]: Analyzing trace with hash -2022037956, now seen corresponding path program 1 times [2018-10-27 08:37:11,571 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:37:11,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:37:11,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:37:11,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:37:11,631 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:37:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:37:12,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:37:12,072 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:37:12,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 08:37:12,074 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:37:12,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 08:37:12,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 08:37:12,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:37:12,101 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-10-27 08:37:22,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:37:22,355 INFO L93 Difference]: Finished difference Result 2164 states and 4009 transitions. [2018-10-27 08:37:22,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 08:37:22,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2018-10-27 08:37:22,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:37:22,391 INFO L225 Difference]: With dead ends: 2164 [2018-10-27 08:37:22,391 INFO L226 Difference]: Without dead ends: 1554 [2018-10-27 08:37:22,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:37:22,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2018-10-27 08:37:22,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1052. [2018-10-27 08:37:22,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1052 states. [2018-10-27 08:37:22,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1882 transitions. [2018-10-27 08:37:22,527 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1882 transitions. Word has length 44 [2018-10-27 08:37:22,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:37:22,528 INFO L481 AbstractCegarLoop]: Abstraction has 1052 states and 1882 transitions. [2018-10-27 08:37:22,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 08:37:22,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1882 transitions. [2018-10-27 08:37:22,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-27 08:37:22,535 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:37:22,535 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:37:22,536 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:37:22,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:37:22,536 INFO L82 PathProgramCache]: Analyzing trace with hash 760811562, now seen corresponding path program 1 times [2018-10-27 08:37:22,536 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:37:22,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:37:22,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:37:22,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:37:22,538 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:37:22,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:37:22,845 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 08:37:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:37:22,925 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:37:22,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 08:37:22,926 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:37:22,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 08:37:22,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 08:37:22,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 08:37:22,928 INFO L87 Difference]: Start difference. First operand 1052 states and 1882 transitions. Second operand 5 states. [2018-10-27 08:37:30,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:37:30,981 INFO L93 Difference]: Finished difference Result 3031 states and 5537 transitions. [2018-10-27 08:37:30,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 08:37:30,982 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 116 [2018-10-27 08:37:30,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:37:30,997 INFO L225 Difference]: With dead ends: 3031 [2018-10-27 08:37:30,997 INFO L226 Difference]: Without dead ends: 1985 [2018-10-27 08:37:31,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-27 08:37:31,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2018-10-27 08:37:31,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1959. [2018-10-27 08:37:31,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1959 states. [2018-10-27 08:37:31,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 3239 transitions. [2018-10-27 08:37:31,097 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 3239 transitions. Word has length 116 [2018-10-27 08:37:31,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:37:31,098 INFO L481 AbstractCegarLoop]: Abstraction has 1959 states and 3239 transitions. [2018-10-27 08:37:31,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 08:37:31,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 3239 transitions. [2018-10-27 08:37:31,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-27 08:37:31,112 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:37:31,113 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:37:31,113 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:37:31,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:37:31,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1743388018, now seen corresponding path program 1 times [2018-10-27 08:37:31,113 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:37:31,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:37:31,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:37:31,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:37:31,116 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:37:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:37:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:37:31,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:37:31,538 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:37:31,539 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 120 with the following transitions: [2018-10-27 08:37:31,541 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [962], [964], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:37:31,586 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:37:31,586 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:37:32,487 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:37:32,490 INFO L272 AbstractInterpreter]: Visited 83 different actions 235 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 08:37:32,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:37:32,525 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:37:32,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:37:32,525 INFO L194 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 [2018-10-27 08:37:32,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:37:32,544 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:37:32,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:37:32,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:37:33,126 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2018-10-27 08:37:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:37:33,556 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:37:34,652 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2018-10-27 08:37:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:37:35,082 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 08:37:35,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2018-10-27 08:37:35,083 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:37:35,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 08:37:35,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 08:37:35,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-10-27 08:37:35,086 INFO L87 Difference]: Start difference. First operand 1959 states and 3239 transitions. Second operand 6 states. [2018-10-27 08:37:54,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:37:54,524 INFO L93 Difference]: Finished difference Result 7518 states and 12893 transitions. [2018-10-27 08:37:54,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 08:37:54,525 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2018-10-27 08:37:54,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:37:54,563 INFO L225 Difference]: With dead ends: 7518 [2018-10-27 08:37:54,563 INFO L226 Difference]: Without dead ends: 5565 [2018-10-27 08:37:54,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-10-27 08:37:54,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5565 states. [2018-10-27 08:37:54,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5565 to 5555. [2018-10-27 08:37:54,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5555 states. [2018-10-27 08:37:54,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5555 states to 5555 states and 9340 transitions. [2018-10-27 08:37:54,751 INFO L78 Accepts]: Start accepts. Automaton has 5555 states and 9340 transitions. Word has length 119 [2018-10-27 08:37:54,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:37:54,752 INFO L481 AbstractCegarLoop]: Abstraction has 5555 states and 9340 transitions. [2018-10-27 08:37:54,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 08:37:54,752 INFO L276 IsEmpty]: Start isEmpty. Operand 5555 states and 9340 transitions. [2018-10-27 08:37:54,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-27 08:37:54,755 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:37:54,756 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:37:54,756 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:37:54,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:37:54,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1915585398, now seen corresponding path program 1 times [2018-10-27 08:37:54,757 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:37:54,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:37:54,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:37:54,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:37:54,758 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:37:54,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:37:55,029 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:37:55,030 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:37:55,030 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:37:55,030 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 133 with the following transitions: [2018-10-27 08:37:55,031 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [962], [964], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:37:55,036 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:37:55,036 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:37:55,298 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:37:55,299 INFO L272 AbstractInterpreter]: Visited 96 different actions 185 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 08:37:55,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:37:55,327 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:37:55,327 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:37:55,327 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:37:55,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:37:55,345 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:37:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:37:55,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:37:55,586 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:37:55,586 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:37:56,043 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:37:56,076 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 08:37:56,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-10-27 08:37:56,076 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:37:56,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 08:37:56,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 08:37:56,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-27 08:37:56,078 INFO L87 Difference]: Start difference. First operand 5555 states and 9340 transitions. Second operand 3 states. [2018-10-27 08:38:01,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:38:01,953 INFO L93 Difference]: Finished difference Result 13726 states and 22953 transitions. [2018-10-27 08:38:01,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 08:38:01,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2018-10-27 08:38:01,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:38:02,003 INFO L225 Difference]: With dead ends: 13726 [2018-10-27 08:38:02,003 INFO L226 Difference]: Without dead ends: 8177 [2018-10-27 08:38:02,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 263 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-27 08:38:02,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8177 states. [2018-10-27 08:38:02,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8177 to 8176. [2018-10-27 08:38:02,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8176 states. [2018-10-27 08:38:02,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8176 states to 8176 states and 12764 transitions. [2018-10-27 08:38:02,252 INFO L78 Accepts]: Start accepts. Automaton has 8176 states and 12764 transitions. Word has length 132 [2018-10-27 08:38:02,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:38:02,252 INFO L481 AbstractCegarLoop]: Abstraction has 8176 states and 12764 transitions. [2018-10-27 08:38:02,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 08:38:02,253 INFO L276 IsEmpty]: Start isEmpty. Operand 8176 states and 12764 transitions. [2018-10-27 08:38:02,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-10-27 08:38:02,260 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:38:02,260 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:38:02,261 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:38:02,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:38:02,261 INFO L82 PathProgramCache]: Analyzing trace with hash 806945292, now seen corresponding path program 1 times [2018-10-27 08:38:02,261 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:38:02,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:38:02,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:38:02,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:38:02,262 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:38:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:38:02,553 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 08:38:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 75 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-10-27 08:38:02,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:38:02,668 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:38:02,668 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 218 with the following transitions: [2018-10-27 08:38:02,668 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [962], [964], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1329], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:38:02,673 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:38:02,673 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:38:03,201 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:38:03,201 INFO L272 AbstractInterpreter]: Visited 107 different actions 307 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 08:38:03,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:38:03,235 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:38:03,235 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:38:03,235 INFO L194 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 [2018-10-27 08:38:03,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:38:03,246 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:38:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:38:03,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:38:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 147 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:38:03,603 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:38:03,778 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 147 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:38:03,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:38:03,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-27 08:38:03,801 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:38:03,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 08:38:03,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 08:38:03,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-10-27 08:38:03,802 INFO L87 Difference]: Start difference. First operand 8176 states and 12764 transitions. Second operand 9 states. [2018-10-27 08:38:14,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:38:14,800 INFO L93 Difference]: Finished difference Result 16886 states and 26665 transitions. [2018-10-27 08:38:14,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 08:38:14,801 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 217 [2018-10-27 08:38:14,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:38:14,838 INFO L225 Difference]: With dead ends: 16886 [2018-10-27 08:38:14,839 INFO L226 Difference]: Without dead ends: 7746 [2018-10-27 08:38:14,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 432 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2018-10-27 08:38:14,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7746 states. [2018-10-27 08:38:15,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7746 to 7723. [2018-10-27 08:38:15,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7723 states. [2018-10-27 08:38:15,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7723 states to 7723 states and 9517 transitions. [2018-10-27 08:38:15,052 INFO L78 Accepts]: Start accepts. Automaton has 7723 states and 9517 transitions. Word has length 217 [2018-10-27 08:38:15,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:38:15,053 INFO L481 AbstractCegarLoop]: Abstraction has 7723 states and 9517 transitions. [2018-10-27 08:38:15,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 08:38:15,053 INFO L276 IsEmpty]: Start isEmpty. Operand 7723 states and 9517 transitions. [2018-10-27 08:38:15,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-10-27 08:38:15,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:38:15,061 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:38:15,061 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:38:15,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:38:15,062 INFO L82 PathProgramCache]: Analyzing trace with hash 559446539, now seen corresponding path program 1 times [2018-10-27 08:38:15,062 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:38:15,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:38:15,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:38:15,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:38:15,063 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:38:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:38:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-27 08:38:15,347 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:38:15,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 08:38:15,348 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:38:15,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 08:38:15,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 08:38:15,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 08:38:15,349 INFO L87 Difference]: Start difference. First operand 7723 states and 9517 transitions. Second operand 3 states. [2018-10-27 08:38:20,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:38:20,302 INFO L93 Difference]: Finished difference Result 21630 states and 26920 transitions. [2018-10-27 08:38:20,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 08:38:20,302 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 298 [2018-10-27 08:38:20,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:38:20,344 INFO L225 Difference]: With dead ends: 21630 [2018-10-27 08:38:20,344 INFO L226 Difference]: Without dead ends: 12143 [2018-10-27 08:38:20,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 08:38:20,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12143 states. [2018-10-27 08:38:20,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12143 to 12140. [2018-10-27 08:38:20,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12140 states. [2018-10-27 08:38:20,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12140 states to 12140 states and 14390 transitions. [2018-10-27 08:38:20,600 INFO L78 Accepts]: Start accepts. Automaton has 12140 states and 14390 transitions. Word has length 298 [2018-10-27 08:38:20,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:38:20,601 INFO L481 AbstractCegarLoop]: Abstraction has 12140 states and 14390 transitions. [2018-10-27 08:38:20,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 08:38:20,601 INFO L276 IsEmpty]: Start isEmpty. Operand 12140 states and 14390 transitions. [2018-10-27 08:38:20,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2018-10-27 08:38:20,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:38:20,616 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:38:20,616 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:38:20,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:38:20,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1770846151, now seen corresponding path program 1 times [2018-10-27 08:38:20,617 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:38:20,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:38:20,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:38:20,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:38:20,618 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:38:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:38:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:38:21,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:38:21,740 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:38:21,740 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 393 with the following transitions: [2018-10-27 08:38:21,741 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [26], [37], [41], [45], [56], [60], [64], [68], [72], [76], [80], [84], [88], [92], [96], [100], [104], [115], [119], [123], [127], [138], [142], [146], [150], [154], [158], [169], [173], [177], [181], [185], [189], [193], [204], [208], [212], [216], [227], [231], [235], [239], [250], [254], [258], [262], [266], [270], [273], [710], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [962], [964], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2039], [2043], [2047], [2051], [2055], [2066], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2159], [2163], [2167], [2171], [2175], [2179], [2183], [2187], [2191], [2202], [2206], [2210], [2214], [2218], [2229], [2233], [2237], [2241], [2252], [2256], [2260], [2264], [2268], [2272], [2276], [2278], [2279], [2283], [2287], [2293], [2297], [2299], [2304], [2305], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:38:21,752 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:38:21,752 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:38:22,879 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:38:22,879 INFO L272 AbstractInterpreter]: Visited 356 different actions 1054 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 08:38:22,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:38:22,909 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:38:22,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:38:22,909 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:38:22,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:38:22,920 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:38:23,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:38:23,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:38:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:38:23,301 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:38:23,892 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:38:23,925 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 08:38:23,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 11 [2018-10-27 08:38:23,925 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:38:23,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 08:38:23,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 08:38:23,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-10-27 08:38:23,928 INFO L87 Difference]: Start difference. First operand 12140 states and 14390 transitions. Second operand 6 states. [2018-10-27 08:38:33,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:38:33,296 INFO L93 Difference]: Finished difference Result 26481 states and 31320 transitions. [2018-10-27 08:38:33,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 08:38:33,298 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 392 [2018-10-27 08:38:33,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:38:33,337 INFO L225 Difference]: With dead ends: 26481 [2018-10-27 08:38:33,337 INFO L226 Difference]: Without dead ends: 13468 [2018-10-27 08:38:33,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 783 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-10-27 08:38:33,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13468 states. [2018-10-27 08:38:33,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13468 to 13022. [2018-10-27 08:38:33,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13022 states. [2018-10-27 08:38:33,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13022 states to 13022 states and 15435 transitions. [2018-10-27 08:38:33,594 INFO L78 Accepts]: Start accepts. Automaton has 13022 states and 15435 transitions. Word has length 392 [2018-10-27 08:38:33,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:38:33,595 INFO L481 AbstractCegarLoop]: Abstraction has 13022 states and 15435 transitions. [2018-10-27 08:38:33,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 08:38:33,595 INFO L276 IsEmpty]: Start isEmpty. Operand 13022 states and 15435 transitions. [2018-10-27 08:38:33,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2018-10-27 08:38:33,617 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:38:33,617 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:38:33,618 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:38:33,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:38:33,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1546186328, now seen corresponding path program 1 times [2018-10-27 08:38:33,619 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:38:33,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:38:33,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:38:33,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:38:33,620 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:38:33,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:38:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 422 proven. 2 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-10-27 08:38:34,425 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:38:34,425 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:38:34,425 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 490 with the following transitions: [2018-10-27 08:38:34,426 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [962], [964], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1266], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1329], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1720], [1723], [1727], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:38:34,431 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:38:34,432 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:38:34,919 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:38:34,919 INFO L272 AbstractInterpreter]: Visited 186 different actions 377 times. Merged at 9 different actions 19 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 26 variables. [2018-10-27 08:38:34,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:38:34,960 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:38:34,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:38:34,960 INFO L194 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 [2018-10-27 08:38:34,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:38:34,974 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:38:35,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:38:35,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:38:35,574 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 422 proven. 2 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-10-27 08:38:35,575 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:38:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 422 proven. 2 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-10-27 08:38:35,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:38:35,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-10-27 08:38:35,940 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:38:35,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 08:38:35,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 08:38:35,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-27 08:38:35,943 INFO L87 Difference]: Start difference. First operand 13022 states and 15435 transitions. Second operand 7 states. [2018-10-27 08:38:46,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:38:46,121 INFO L93 Difference]: Finished difference Result 35956 states and 43952 transitions. [2018-10-27 08:38:46,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-27 08:38:46,121 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 489 [2018-10-27 08:38:46,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:38:46,184 INFO L225 Difference]: With dead ends: 35956 [2018-10-27 08:38:46,184 INFO L226 Difference]: Without dead ends: 22497 [2018-10-27 08:38:46,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 995 GetRequests, 981 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-10-27 08:38:46,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22497 states. [2018-10-27 08:38:46,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22497 to 19404. [2018-10-27 08:38:46,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19404 states. [2018-10-27 08:38:46,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19404 states to 19404 states and 23113 transitions. [2018-10-27 08:38:46,598 INFO L78 Accepts]: Start accepts. Automaton has 19404 states and 23113 transitions. Word has length 489 [2018-10-27 08:38:46,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:38:46,600 INFO L481 AbstractCegarLoop]: Abstraction has 19404 states and 23113 transitions. [2018-10-27 08:38:46,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-27 08:38:46,600 INFO L276 IsEmpty]: Start isEmpty. Operand 19404 states and 23113 transitions. [2018-10-27 08:38:46,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2018-10-27 08:38:46,629 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:38:46,630 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:38:46,630 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:38:46,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:38:46,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1817005450, now seen corresponding path program 1 times [2018-10-27 08:38:46,631 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:38:46,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:38:46,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:38:46,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:38:46,632 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:38:46,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:38:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 121 proven. 159 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-10-27 08:38:47,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:38:47,373 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:38:47,373 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 501 with the following transitions: [2018-10-27 08:38:47,373 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [962], [964], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1239], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2039], [2043], [2047], [2051], [2055], [2066], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2159], [2163], [2167], [2171], [2175], [2179], [2183], [2187], [2191], [2202], [2206], [2210], [2214], [2218], [2229], [2233], [2237], [2241], [2252], [2256], [2260], [2264], [2268], [2272], [2275], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:38:47,381 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:38:47,382 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:38:48,025 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:38:48,025 INFO L272 AbstractInterpreter]: Visited 299 different actions 600 times. Merged at 8 different actions 14 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 26 variables. [2018-10-27 08:38:48,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:38:48,061 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:38:48,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:38:48,061 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:38:48,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:38:48,075 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:38:48,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:38:48,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:38:48,655 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2018-10-27 08:38:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 245 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2018-10-27 08:38:48,950 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:38:51,508 WARN L179 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2018-10-27 08:38:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 121 proven. 231 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 08:38:52,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:38:52,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2018-10-27 08:38:52,132 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:38:52,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 08:38:52,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 08:38:52,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=126, Unknown=1, NotChecked=0, Total=182 [2018-10-27 08:38:52,134 INFO L87 Difference]: Start difference. First operand 19404 states and 23113 transitions. Second operand 9 states. [2018-10-27 08:39:08,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:39:08,699 INFO L93 Difference]: Finished difference Result 53901 states and 64418 transitions. [2018-10-27 08:39:08,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-27 08:39:08,699 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 500 [2018-10-27 08:39:08,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:39:08,774 INFO L225 Difference]: With dead ends: 53901 [2018-10-27 08:39:08,774 INFO L226 Difference]: Without dead ends: 33635 [2018-10-27 08:39:08,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1029 GetRequests, 1004 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=181, Invalid=418, Unknown=1, NotChecked=0, Total=600 [2018-10-27 08:39:08,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33635 states. [2018-10-27 08:39:09,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33635 to 29570. [2018-10-27 08:39:09,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29570 states. [2018-10-27 08:39:09,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29570 states to 29570 states and 34850 transitions. [2018-10-27 08:39:09,347 INFO L78 Accepts]: Start accepts. Automaton has 29570 states and 34850 transitions. Word has length 500 [2018-10-27 08:39:09,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:39:09,348 INFO L481 AbstractCegarLoop]: Abstraction has 29570 states and 34850 transitions. [2018-10-27 08:39:09,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 08:39:09,348 INFO L276 IsEmpty]: Start isEmpty. Operand 29570 states and 34850 transitions. [2018-10-27 08:39:09,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2018-10-27 08:39:09,394 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:39:09,395 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:39:09,395 INFO L424 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:39:09,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:39:09,396 INFO L82 PathProgramCache]: Analyzing trace with hash 832784655, now seen corresponding path program 1 times [2018-10-27 08:39:09,396 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:39:09,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:39:09,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:39:09,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:39:09,399 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:39:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:39:10,011 WARN L179 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 6 [2018-10-27 08:39:10,319 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 430 proven. 2 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-10-27 08:39:10,320 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:39:10,320 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:39:10,320 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 612 with the following transitions: [2018-10-27 08:39:10,321 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [962], [964], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1278], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1356], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2039], [2043], [2047], [2051], [2055], [2066], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2159], [2163], [2167], [2171], [2175], [2179], [2183], [2187], [2191], [2202], [2206], [2210], [2214], [2218], [2229], [2233], [2237], [2241], [2252], [2256], [2260], [2264], [2268], [2272], [2275], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:39:10,327 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:39:10,327 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:39:11,285 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:39:11,285 INFO L272 AbstractInterpreter]: Visited 300 different actions 605 times. Merged at 9 different actions 17 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 26 variables. [2018-10-27 08:39:11,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:39:11,322 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:39:11,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:39:11,322 INFO L194 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) [2018-10-27 08:39:11,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:39:11,333 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:39:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:39:11,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:39:12,039 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2018-10-27 08:39:12,040 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:39:12,386 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2018-10-27 08:39:12,408 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 08:39:12,409 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2018-10-27 08:39:12,409 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:39:12,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 08:39:12,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 08:39:12,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-10-27 08:39:12,410 INFO L87 Difference]: Start difference. First operand 29570 states and 34850 transitions. Second operand 3 states. [2018-10-27 08:39:53,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:39:53,448 INFO L93 Difference]: Finished difference Result 74870 states and 89257 transitions. [2018-10-27 08:39:53,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 08:39:53,449 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 611 [2018-10-27 08:39:53,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:39:53,557 INFO L225 Difference]: With dead ends: 74870 [2018-10-27 08:39:53,558 INFO L226 Difference]: Without dead ends: 45302 [2018-10-27 08:39:53,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1226 GetRequests, 1221 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-10-27 08:39:53,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45302 states. [2018-10-27 08:39:54,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45302 to 39638. [2018-10-27 08:39:54,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39638 states. [2018-10-27 08:39:54,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39638 states to 39638 states and 45141 transitions. [2018-10-27 08:39:54,779 INFO L78 Accepts]: Start accepts. Automaton has 39638 states and 45141 transitions. Word has length 611 [2018-10-27 08:39:54,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:39:54,780 INFO L481 AbstractCegarLoop]: Abstraction has 39638 states and 45141 transitions. [2018-10-27 08:39:54,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 08:39:54,781 INFO L276 IsEmpty]: Start isEmpty. Operand 39638 states and 45141 transitions. [2018-10-27 08:39:54,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 734 [2018-10-27 08:39:54,864 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:39:54,864 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:39:54,865 INFO L424 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:39:54,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:39:54,865 INFO L82 PathProgramCache]: Analyzing trace with hash 650424333, now seen corresponding path program 1 times [2018-10-27 08:39:54,865 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:39:54,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:39:54,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:39:54,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:39:54,867 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:39:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:39:55,468 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2018-10-27 08:39:55,749 WARN L179 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 9 [2018-10-27 08:39:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2018-10-27 08:39:56,122 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:39:56,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 08:39:56,122 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:39:56,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 08:39:56,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 08:39:56,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:39:56,126 INFO L87 Difference]: Start difference. First operand 39638 states and 45141 transitions. Second operand 4 states. [2018-10-27 08:39:56,207 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:102) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.pop(ManagedScript.java:131) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:650) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:254) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:269) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:164) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:202) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:689) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:602) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:473) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.io.IOException: Broken pipe at java.io.FileOutputStream.writeBytes(Native Method) at java.io.FileOutputStream.write(FileOutputStream.java:326) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:297) at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141) at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229) at java.io.BufferedWriter.flush(BufferedWriter.java:254) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:120) ... 28 more [2018-10-27 08:39:56,212 INFO L168 Benchmark]: Toolchain (without parser) took 178400.06 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.4 GB). Free memory was 1.4 GB in the beginning and 2.7 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. [2018-10-27 08:39:56,214 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 08:39:56,215 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1557.95 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. [2018-10-27 08:39:56,215 INFO L168 Benchmark]: Boogie Procedure Inliner took 453.11 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 747.1 MB). Free memory was 1.2 GB in the beginning and 2.1 GB in the end (delta: -903.3 MB). Peak memory consumption was 45.5 MB. Max. memory is 7.1 GB. [2018-10-27 08:39:56,219 INFO L168 Benchmark]: Boogie Preprocessor took 272.21 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 42.9 MB). Peak memory consumption was 42.9 MB. Max. memory is 7.1 GB. [2018-10-27 08:39:56,219 INFO L168 Benchmark]: RCFGBuilder took 11321.63 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.6 GB in the end (delta: 470.1 MB). Peak memory consumption was 470.1 MB. Max. memory is 7.1 GB. [2018-10-27 08:39:56,220 INFO L168 Benchmark]: TraceAbstraction took 164788.79 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.6 GB). Free memory was 1.6 GB in the beginning and 2.7 GB in the end (delta: -1.1 GB). Peak memory consumption was 540.1 MB. Max. memory is 7.1 GB. [2018-10-27 08:39:56,226 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1557.95 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 453.11 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 747.1 MB). Free memory was 1.2 GB in the beginning and 2.1 GB in the end (delta: -903.3 MB). Peak memory consumption was 45.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 272.21 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 42.9 MB). Peak memory consumption was 42.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 11321.63 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.6 GB in the end (delta: 470.1 MB). Peak memory consumption was 470.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 164788.79 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.6 GB). Free memory was 1.6 GB in the beginning and 2.7 GB in the end (delta: -1.1 GB). Peak memory consumption was 540.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...