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_label44_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-25 02:00:53,828 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-25 02:00:53,830 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-25 02:00:53,847 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-25 02:00:53,847 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-25 02:00:53,848 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-25 02:00:53,849 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-25 02:00:53,851 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-25 02:00:53,853 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-25 02:00:53,854 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-25 02:00:53,855 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-25 02:00:53,855 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-25 02:00:53,856 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-25 02:00:53,857 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-25 02:00:53,858 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-25 02:00:53,859 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-25 02:00:53,859 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-25 02:00:53,861 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-25 02:00:53,864 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-25 02:00:53,865 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-25 02:00:53,866 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-25 02:00:53,868 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-25 02:00:53,870 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-25 02:00:53,879 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 [2018-10-25 02:00:53,905 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-25 02:00:53,907 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-25 02:00:53,908 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-25 02:00:53,909 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-25 02:00:53,909 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-25 02:00:53,909 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-25 02:00:53,909 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-25 02:00:53,909 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-25 02:00:53,910 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-25 02:00:53,910 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-25 02:00:53,910 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-25 02:00:53,910 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-25 02:00:53,910 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-25 02:00:53,910 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-25 02:00:53,912 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-25 02:00:53,912 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-25 02:00:53,912 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-25 02:00:53,913 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-25 02:00:53,914 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-25 02:00:53,915 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-25 02:00:53,915 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-25 02:00:53,915 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-25 02:00:53,915 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-25 02:00:53,915 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-25 02:00:53,916 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-25 02:00:53,916 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-25 02:00:53,916 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-25 02:00:53,916 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-25 02:00:53,917 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-25 02:00:53,917 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-25 02:00:53,917 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-25 02:00:53,917 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-25 02:00:53,917 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-25 02:00:53,918 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-25 02:00:53,918 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-25 02:00:53,918 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-25 02:00:53,985 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-25 02:00:54,001 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-25 02:00:54,005 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-25 02:00:54,007 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-25 02:00:54,007 INFO L276 PluginConnector]: CDTParser initialized [2018-10-25 02:00:54,008 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label44_true-unreach-call.c [2018-10-25 02:00:54,072 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8e466a6de/2ab91fc6c22a46d9bdd1a2a57c624cd0/FLAG24876c3f8 [2018-10-25 02:00:54,770 INFO L298 CDTParser]: Found 1 translation units. [2018-10-25 02:00:54,770 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label44_true-unreach-call.c [2018-10-25 02:00:54,791 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8e466a6de/2ab91fc6c22a46d9bdd1a2a57c624cd0/FLAG24876c3f8 [2018-10-25 02:00:54,807 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8e466a6de/2ab91fc6c22a46d9bdd1a2a57c624cd0 [2018-10-25 02:00:54,818 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-25 02:00:54,819 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-25 02:00:54,821 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-25 02:00:54,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-25 02:00:54,825 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-25 02:00:54,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 02:00:54" (1/1) ... [2018-10-25 02:00:54,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35da2c64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:00:54, skipping insertion in model container [2018-10-25 02:00:54,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 02:00:54" (1/1) ... [2018-10-25 02:00:54,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-25 02:00:54,972 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-25 02:00:55,958 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-25 02:00:55,964 INFO L189 MainTranslator]: Completed pre-run [2018-10-25 02:00:56,362 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-25 02:00:56,386 INFO L193 MainTranslator]: Completed translation [2018-10-25 02:00:56,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:00:56 WrapperNode [2018-10-25 02:00:56,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-25 02:00:56,388 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-25 02:00:56,388 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-25 02:00:56,388 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-25 02:00:56,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:00:56" (1/1) ... [2018-10-25 02:00:56,463 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:00:56" (1/1) ... [2018-10-25 02:00:56,898 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-25 02:00:56,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-25 02:00:56,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-25 02:00:56,899 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-25 02:00:56,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:00:56" (1/1) ... [2018-10-25 02:00:56,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:00:56" (1/1) ... [2018-10-25 02:00:56,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:00:56" (1/1) ... [2018-10-25 02:00:56,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:00:56" (1/1) ... [2018-10-25 02:00:57,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:00:56" (1/1) ... [2018-10-25 02:00:57,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:00:56" (1/1) ... [2018-10-25 02:00:57,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:00:56" (1/1) ... [2018-10-25 02:00:57,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-25 02:00:57,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-25 02:00:57,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-25 02:00:57,220 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-25 02:00:57,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:00:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-25 02:00:57,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-25 02:00:57,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-25 02:00:57,284 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-25 02:00:57,284 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-25 02:00:57,284 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-25 02:00:57,284 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-25 02:00:57,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-25 02:00:57,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-25 02:00:57,285 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-25 02:00:57,285 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-25 02:01:07,816 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-25 02:01:07,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 02:01:07 BoogieIcfgContainer [2018-10-25 02:01:07,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-25 02:01:07,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-25 02:01:07,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-25 02:01:07,825 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-25 02:01:07,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 02:00:54" (1/3) ... [2018-10-25 02:01:07,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a2e3dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 02:01:07, skipping insertion in model container [2018-10-25 02:01:07,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:00:56" (2/3) ... [2018-10-25 02:01:07,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a2e3dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 02:01:07, skipping insertion in model container [2018-10-25 02:01:07,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 02:01:07" (3/3) ... [2018-10-25 02:01:07,829 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label44_true-unreach-call.c [2018-10-25 02:01:07,840 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-25 02:01:07,852 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-25 02:01:07,886 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-25 02:01:07,935 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-25 02:01:07,935 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-25 02:01:07,935 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-25 02:01:07,935 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-25 02:01:07,936 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-25 02:01:07,936 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-25 02:01:07,936 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-25 02:01:07,936 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-25 02:01:07,987 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-25 02:01:07,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-25 02:01:07,995 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:01:07,996 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] [2018-10-25 02:01:07,998 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:01:08,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:01:08,004 INFO L82 PathProgramCache]: Analyzing trace with hash 203482100, now seen corresponding path program 1 times [2018-10-25 02:01:08,006 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:01:08,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:01:08,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:01:08,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:01:08,052 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:01:08,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:01:08,512 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-25 02:01:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 02:01:08,532 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 02:01:08,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-25 02:01:08,533 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 02:01:08,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-25 02:01:08,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-25 02:01:08,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-25 02:01:08,558 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-10-25 02:01:18,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 02:01:18,008 INFO L93 Difference]: Finished difference Result 2118 states and 3937 transitions. [2018-10-25 02:01:18,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-25 02:01:18,010 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2018-10-25 02:01:18,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 02:01:18,041 INFO L225 Difference]: With dead ends: 2118 [2018-10-25 02:01:18,041 INFO L226 Difference]: Without dead ends: 1508 [2018-10-25 02:01:18,054 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-25 02:01:18,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2018-10-25 02:01:18,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1039. [2018-10-25 02:01:18,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2018-10-25 02:01:18,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1596 transitions. [2018-10-25 02:01:18,177 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1596 transitions. Word has length 42 [2018-10-25 02:01:18,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 02:01:18,178 INFO L481 AbstractCegarLoop]: Abstraction has 1039 states and 1596 transitions. [2018-10-25 02:01:18,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-25 02:01:18,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1596 transitions. [2018-10-25 02:01:18,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-25 02:01:18,185 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:01:18,185 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 02:01:18,186 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:01:18,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:01:18,186 INFO L82 PathProgramCache]: Analyzing trace with hash -2133934966, now seen corresponding path program 1 times [2018-10-25 02:01:18,187 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:01:18,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:01:18,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:01:18,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:01:18,188 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:01:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:01:18,540 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 02:01:18,540 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 02:01:18,540 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 02:01:18,541 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 118 with the following transitions: [2018-10-25 02:01:18,543 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], [946], [948], [951], [959], [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] [2018-10-25 02:01:18,600 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 02:01:18,600 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 02:01:20,488 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 02:01:20,490 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. [2018-10-25 02:01:20,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:01:20,539 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 02:01:20,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 02:01:20,539 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 [2018-10-25 02:01:20,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:01:20,556 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 02:01:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:01:20,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 02:01:49,560 WARN L179 SmtUtils]: Spent 24.27 s on a formula simplification. DAG size of input: 135 DAG size of output: 98 [2018-10-25 02:02:09,906 WARN L179 SmtUtils]: Spent 16.10 s on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2018-10-25 02:02:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 02:02:10,269 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 02:02:16,928 WARN L179 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 133 DAG size of output: 16 [2018-10-25 02:02:17,259 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2018-10-25 02:02:19,874 WARN L179 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 26 [2018-10-25 02:02:20,206 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 02:02:20,241 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-25 02:02:20,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2018-10-25 02:02:20,242 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 02:02:20,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-25 02:02:20,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-25 02:02:20,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=159, Unknown=6, NotChecked=0, Total=210 [2018-10-25 02:02:20,244 INFO L87 Difference]: Start difference. First operand 1039 states and 1596 transitions. Second operand 6 states. [2018-10-25 02:03:47,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 02:03:47,135 INFO L93 Difference]: Finished difference Result 3903 states and 6150 transitions. [2018-10-25 02:03:47,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-25 02:03:47,137 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2018-10-25 02:03:47,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 02:03:47,158 INFO L225 Difference]: With dead ends: 3903 [2018-10-25 02:03:47,158 INFO L226 Difference]: Without dead ends: 2870 [2018-10-25 02:03:47,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 228 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 58.6s TimeCoverageRelationStatistics Valid=52, Invalid=182, Unknown=6, NotChecked=0, Total=240 [2018-10-25 02:03:47,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2018-10-25 02:03:47,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 2841. [2018-10-25 02:03:47,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2841 states. [2018-10-25 02:03:47,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2841 states to 2841 states and 4220 transitions. [2018-10-25 02:03:47,282 INFO L78 Accepts]: Start accepts. Automaton has 2841 states and 4220 transitions. Word has length 117 [2018-10-25 02:03:47,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 02:03:47,283 INFO L481 AbstractCegarLoop]: Abstraction has 2841 states and 4220 transitions. [2018-10-25 02:03:47,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-25 02:03:47,283 INFO L276 IsEmpty]: Start isEmpty. Operand 2841 states and 4220 transitions. [2018-10-25 02:03:47,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-25 02:03:47,293 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:03:47,294 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 02:03:47,294 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:03:47,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:03:47,295 INFO L82 PathProgramCache]: Analyzing trace with hash -2131862897, now seen corresponding path program 1 times [2018-10-25 02:03:47,295 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:03:47,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:03:47,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:03:47,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:03:47,296 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:03:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:03:47,615 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 02:03:47,615 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 02:03:47,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-25 02:03:47,616 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 02:03:47,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-25 02:03:47,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-25 02:03:47,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-25 02:03:47,617 INFO L87 Difference]: Start difference. First operand 2841 states and 4220 transitions. Second operand 4 states. [2018-10-25 02:03:54,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 02:03:54,890 INFO L93 Difference]: Finished difference Result 10472 states and 16175 transitions. [2018-10-25 02:03:54,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-25 02:03:54,893 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2018-10-25 02:03:54,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 02:03:54,945 INFO L225 Difference]: With dead ends: 10472 [2018-10-25 02:03:54,945 INFO L226 Difference]: Without dead ends: 7637 [2018-10-25 02:03:54,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-25 02:03:54,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7637 states. [2018-10-25 02:03:55,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7637 to 7635. [2018-10-25 02:03:55,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7635 states. [2018-10-25 02:03:55,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7635 states to 7635 states and 11000 transitions. [2018-10-25 02:03:55,174 INFO L78 Accepts]: Start accepts. Automaton has 7635 states and 11000 transitions. Word has length 152 [2018-10-25 02:03:55,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 02:03:55,175 INFO L481 AbstractCegarLoop]: Abstraction has 7635 states and 11000 transitions. [2018-10-25 02:03:55,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-25 02:03:55,176 INFO L276 IsEmpty]: Start isEmpty. Operand 7635 states and 11000 transitions. [2018-10-25 02:03:55,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-25 02:03:55,182 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:03:55,182 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 02:03:55,183 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:03:55,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:03:55,186 INFO L82 PathProgramCache]: Analyzing trace with hash 361445737, now seen corresponding path program 1 times [2018-10-25 02:03:55,186 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:03:55,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:03:55,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:03:55,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:03:55,188 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:03:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:03:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 02:03:55,626 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 02:03:55,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-25 02:03:55,626 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 02:03:55,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-25 02:03:55,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-25 02:03:55,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-25 02:03:55,628 INFO L87 Difference]: Start difference. First operand 7635 states and 11000 transitions. Second operand 5 states. [2018-10-25 02:04:13,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 02:04:13,941 INFO L93 Difference]: Finished difference Result 23776 states and 36085 transitions. [2018-10-25 02:04:13,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-25 02:04:13,944 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 180 [2018-10-25 02:04:13,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 02:04:14,044 INFO L225 Difference]: With dead ends: 23776 [2018-10-25 02:04:14,044 INFO L226 Difference]: Without dead ends: 16147 [2018-10-25 02:04:14,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-25 02:04:14,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16147 states. [2018-10-25 02:04:14,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16147 to 16112. [2018-10-25 02:04:14,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16112 states. [2018-10-25 02:04:14,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16112 states to 16112 states and 22520 transitions. [2018-10-25 02:04:14,523 INFO L78 Accepts]: Start accepts. Automaton has 16112 states and 22520 transitions. Word has length 180 [2018-10-25 02:04:14,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 02:04:14,524 INFO L481 AbstractCegarLoop]: Abstraction has 16112 states and 22520 transitions. [2018-10-25 02:04:14,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-25 02:04:14,524 INFO L276 IsEmpty]: Start isEmpty. Operand 16112 states and 22520 transitions. [2018-10-25 02:04:14,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-25 02:04:14,530 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:04:14,530 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 02:04:14,530 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:04:14,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:04:14,531 INFO L82 PathProgramCache]: Analyzing trace with hash 2127998129, now seen corresponding path program 1 times [2018-10-25 02:04:14,531 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:04:14,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:04:14,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:04:14,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:04:14,532 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:04:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:04:14,851 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-25 02:04:15,177 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 71 proven. 5 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-10-25 02:04:15,177 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 02:04:15,177 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 02:04:15,178 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 207 with the following transitions: [2018-10-25 02:04:15,178 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], [946], [948], [951], [959], [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], [1286], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-25 02:04:15,183 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 02:04:15,183 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 02:04:16,116 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 02:04:16,116 INFO L272 AbstractInterpreter]: Visited 98 different actions 280 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-25 02:04:16,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:04:16,144 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 02:04:16,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 02:04:16,144 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 [2018-10-25 02:04:16,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:04:16,155 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 02:04:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:04:16,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 02:04:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 02:04:16,370 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 02:04:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 02:04:16,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-25 02:04:16,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-10-25 02:04:16,625 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-25 02:04:16,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-25 02:04:16,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-25 02:04:16,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-10-25 02:04:16,626 INFO L87 Difference]: Start difference. First operand 16112 states and 22520 transitions. Second operand 9 states. [2018-10-25 02:04:24,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 02:04:24,487 INFO L93 Difference]: Finished difference Result 32491 states and 45743 transitions. [2018-10-25 02:04:24,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-25 02:04:24,492 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 206 [2018-10-25 02:04:24,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 02:04:24,539 INFO L225 Difference]: With dead ends: 32491 [2018-10-25 02:04:24,539 INFO L226 Difference]: Without dead ends: 13709 [2018-10-25 02:04:24,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 410 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2018-10-25 02:04:24,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13709 states. [2018-10-25 02:04:24,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13709 to 13188. [2018-10-25 02:04:24,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13188 states. [2018-10-25 02:04:24,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13188 states to 13188 states and 15097 transitions. [2018-10-25 02:04:24,869 INFO L78 Accepts]: Start accepts. Automaton has 13188 states and 15097 transitions. Word has length 206 [2018-10-25 02:04:24,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 02:04:24,870 INFO L481 AbstractCegarLoop]: Abstraction has 13188 states and 15097 transitions. [2018-10-25 02:04:24,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-25 02:04:24,870 INFO L276 IsEmpty]: Start isEmpty. Operand 13188 states and 15097 transitions. [2018-10-25 02:04:24,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-25 02:04:24,874 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:04:24,874 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 02:04:24,875 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:04:24,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:04:24,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1274034599, now seen corresponding path program 1 times [2018-10-25 02:04:24,875 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:04:24,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:04:24,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:04:24,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:04:24,877 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:04:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:04:25,066 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-25 02:04:25,067 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 02:04:25,067 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-25 02:04:25,067 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 02:04:25,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-25 02:04:25,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-25 02:04:25,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-25 02:04:25,068 INFO L87 Difference]: Start difference. First operand 13188 states and 15097 transitions. Second operand 3 states. [2018-10-25 02:04:30,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 02:04:30,489 INFO L93 Difference]: Finished difference Result 30352 states and 35546 transitions. [2018-10-25 02:04:30,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-25 02:04:30,490 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 219 [2018-10-25 02:04:30,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 02:04:30,540 INFO L225 Difference]: With dead ends: 30352 [2018-10-25 02:04:30,540 INFO L226 Difference]: Without dead ends: 13582 [2018-10-25 02:04:30,572 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 [2018-10-25 02:04:30,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13582 states. [2018-10-25 02:04:30,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13582 to 11386. [2018-10-25 02:04:30,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11386 states. [2018-10-25 02:04:31,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11386 states to 11386 states and 13325 transitions. [2018-10-25 02:04:31,001 INFO L78 Accepts]: Start accepts. Automaton has 11386 states and 13325 transitions. Word has length 219 [2018-10-25 02:04:31,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 02:04:31,002 INFO L481 AbstractCegarLoop]: Abstraction has 11386 states and 13325 transitions. [2018-10-25 02:04:31,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-25 02:04:31,002 INFO L276 IsEmpty]: Start isEmpty. Operand 11386 states and 13325 transitions. [2018-10-25 02:04:31,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-10-25 02:04:31,010 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:04:31,010 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-25 02:04:31,010 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:04:31,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:04:31,011 INFO L82 PathProgramCache]: Analyzing trace with hash 676272086, now seen corresponding path program 1 times [2018-10-25 02:04:31,011 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:04:31,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:04:31,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:04:31,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:04:31,012 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:04:31,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:04:31,778 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-25 02:04:31,778 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 02:04:31,778 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 02:04:31,779 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 291 with the following transitions: [2018-10-25 02:04:31,780 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], [946], [948], [951], [959], [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], [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], [1654], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-25 02:04:31,786 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 02:04:31,787 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 02:04:32,187 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 02:04:32,187 INFO L272 AbstractInterpreter]: Visited 169 different actions 337 times. Merged at 7 different actions 11 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 26 variables. [2018-10-25 02:04:32,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:04:32,213 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 02:04:32,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 02:04:32,214 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 [2018-10-25 02:04:32,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:04:32,230 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 02:04:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:04:32,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 02:04:32,740 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2018-10-25 02:04:33,148 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-25 02:04:33,148 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 02:04:33,581 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-10-25 02:04:35,913 WARN L179 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 39 DAG size of output: 15 [2018-10-25 02:04:36,451 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 75 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 02:04:36,472 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-25 02:04:36,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2018-10-25 02:04:36,472 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-25 02:04:36,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-25 02:04:36,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-25 02:04:36,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2018-10-25 02:04:36,474 INFO L87 Difference]: Start difference. First operand 11386 states and 13325 transitions. Second operand 10 states. [2018-10-25 02:05:04,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 02:05:04,795 INFO L93 Difference]: Finished difference Result 44287 states and 55019 transitions. [2018-10-25 02:05:04,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-25 02:05:04,796 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 290 [2018-10-25 02:05:04,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 02:05:04,905 INFO L225 Difference]: With dead ends: 44287 [2018-10-25 02:05:04,905 INFO L226 Difference]: Without dead ends: 32013 [2018-10-25 02:05:04,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 573 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2018-10-25 02:05:04,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32013 states. [2018-10-25 02:05:05,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32013 to 31853. [2018-10-25 02:05:05,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31853 states. [2018-10-25 02:05:05,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31853 states to 31853 states and 37797 transitions. [2018-10-25 02:05:05,502 INFO L78 Accepts]: Start accepts. Automaton has 31853 states and 37797 transitions. Word has length 290 [2018-10-25 02:05:05,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 02:05:05,503 INFO L481 AbstractCegarLoop]: Abstraction has 31853 states and 37797 transitions. [2018-10-25 02:05:05,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-25 02:05:05,503 INFO L276 IsEmpty]: Start isEmpty. Operand 31853 states and 37797 transitions. [2018-10-25 02:05:05,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2018-10-25 02:05:05,518 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:05:05,518 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 02:05:05,518 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:05:05,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:05:05,519 INFO L82 PathProgramCache]: Analyzing trace with hash -855487446, now seen corresponding path program 1 times [2018-10-25 02:05:05,519 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:05:05,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:05:05,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:05:05,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:05:05,520 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:05:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:05:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2018-10-25 02:05:06,017 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 02:05:06,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-25 02:05:06,017 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 02:05:06,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-25 02:05:06,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-25 02:05:06,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-25 02:05:06,018 INFO L87 Difference]: Start difference. First operand 31853 states and 37797 transitions. Second operand 4 states. Received shutdown request... [2018-10-25 02:05:10,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-25 02:05:10,049 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-25 02:05:10,056 WARN L205 ceAbstractionStarter]: Timeout [2018-10-25 02:05:10,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 02:05:10 BoogieIcfgContainer [2018-10-25 02:05:10,056 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-25 02:05:10,057 INFO L168 Benchmark]: Toolchain (without parser) took 255238.75 ms. Allocated memory was 1.5 GB in the beginning and 3.2 GB in the end (delta: 1.6 GB). Free memory was 1.4 GB in the beginning and 2.9 GB in the end (delta: -1.5 GB). Peak memory consumption was 139.5 MB. Max. memory is 7.1 GB. [2018-10-25 02:05:10,058 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-25 02:05:10,059 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1566.82 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 140.0 MB). Peak memory consumption was 140.0 MB. Max. memory is 7.1 GB. [2018-10-25 02:05:10,060 INFO L168 Benchmark]: Boogie Procedure Inliner took 510.60 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 779.6 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -928.8 MB). Peak memory consumption was 56.4 MB. Max. memory is 7.1 GB. [2018-10-25 02:05:10,061 INFO L168 Benchmark]: Boogie Preprocessor took 319.93 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 44.0 MB). Peak memory consumption was 44.0 MB. Max. memory is 7.1 GB. [2018-10-25 02:05:10,062 INFO L168 Benchmark]: RCFGBuilder took 10600.69 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 455.8 MB). Peak memory consumption was 455.8 MB. Max. memory is 7.1 GB. [2018-10-25 02:05:10,062 INFO L168 Benchmark]: TraceAbstraction took 242235.15 ms. Allocated memory was 2.3 GB in the beginning and 3.2 GB in the end (delta: 855.6 MB). Free memory was 1.7 GB in the beginning and 2.9 GB in the end (delta: -1.2 GB). There was no memory consumed. Max. memory is 7.1 GB. [2018-10-25 02:05:10,067 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1566.82 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 140.0 MB). Peak memory consumption was 140.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 510.60 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 779.6 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -928.8 MB). Peak memory consumption was 56.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 319.93 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 44.0 MB). Peak memory consumption was 44.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 10600.69 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 455.8 MB). Peak memory consumption was 455.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 242235.15 ms. Allocated memory was 2.3 GB in the beginning and 3.2 GB in the end (delta: 855.6 MB). Free memory was 1.7 GB in the beginning and 2.9 GB in the end (delta: -1.2 GB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 113]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 113). Cancelled while BasicCegarLoop was constructing difference of abstraction (31853states) and FLOYD_HOARE automaton (currently 4 states, 4 states before enhancement),while ReachableStatesComputation was computing reachable states (8368 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 242.1s OverallTime, 8 OverallIterations, 4 TraceHistogramMax, 168.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3440 SDtfs, 13912 SDslu, 2127 SDs, 0 SdLazy, 27633 SolverSat, 7470 SolverUnsat, 31 SolverUnknown, 0 SolverNotchecked, 157.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1299 GetRequests, 1228 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 64.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31853occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 3.3s AbstIntTime, 3 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 3412 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 66.9s InterpolantComputationTime, 2201 NumberOfCodeBlocks, 2201 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 2800 ConstructedInterpolants, 209 QuantifiedInterpolants, 3524843 SizeOfPredicates, 5 NumberOfNonLiveVariables, 1153 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 1471/1633 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown