java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label11_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 21:00:31,810 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 21:00:31,812 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 21:00:31,825 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 21:00:31,827 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 21:00:31,828 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 21:00:31,829 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 21:00:31,831 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 21:00:31,833 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 21:00:31,834 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 21:00:31,835 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 21:00:31,835 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 21:00:31,836 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 21:00:31,837 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 21:00:31,838 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 21:00:31,839 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 21:00:31,840 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 21:00:31,842 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 21:00:31,844 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 21:00:31,846 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 21:00:31,847 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 21:00:31,848 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 21:00:31,853 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-11-07 21:00:31,872 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-07 21:00:31,901 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 21:00:31,902 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 21:00:31,903 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 21:00:31,903 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 21:00:31,904 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 21:00:31,904 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 21:00:31,904 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 21:00:31,904 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 21:00:31,904 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 21:00:31,905 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 21:00:31,905 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 21:00:31,906 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 21:00:31,906 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 21:00:31,907 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 21:00:31,907 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 21:00:31,907 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 21:00:31,907 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 21:00:31,907 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 21:00:31,909 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 21:00:31,909 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 21:00:31,910 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 21:00:31,910 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 21:00:31,910 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 21:00:31,910 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 21:00:31,910 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 21:00:31,911 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 21:00:31,911 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 21:00:31,911 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 21:00:31,912 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 21:00:31,912 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 21:00:31,912 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 21:00:31,912 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 21:00:31,912 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 21:00:31,913 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 21:00:31,913 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 21:00:31,968 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 21:00:31,985 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 21:00:31,990 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 21:00:31,992 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 21:00:31,992 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 21:00:31,993 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label11_true-unreach-call.c [2018-11-07 21:00:32,056 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00fe3ec68/3a000a471dbd4ee59d2b1ac86db797d8/FLAGd3a4241e2 [2018-11-07 21:00:32,795 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 21:00:32,796 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label11_true-unreach-call.c [2018-11-07 21:00:32,824 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00fe3ec68/3a000a471dbd4ee59d2b1ac86db797d8/FLAGd3a4241e2 [2018-11-07 21:00:32,843 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00fe3ec68/3a000a471dbd4ee59d2b1ac86db797d8 [2018-11-07 21:00:32,856 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 21:00:32,858 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 21:00:32,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 21:00:32,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 21:00:32,866 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 21:00:32,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 09:00:32" (1/1) ... [2018-11-07 21:00:32,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60fab143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:00:32, skipping insertion in model container [2018-11-07 21:00:32,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 09:00:32" (1/1) ... [2018-11-07 21:00:32,883 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 21:00:33,016 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 21:00:34,009 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 21:00:34,014 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 21:00:34,469 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 21:00:34,495 INFO L193 MainTranslator]: Completed translation [2018-11-07 21:00:34,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:00:34 WrapperNode [2018-11-07 21:00:34,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 21:00:34,497 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 21:00:34,497 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 21:00:34,497 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 21:00:34,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:00:34" (1/1) ... [2018-11-07 21:00:34,760 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:00:34" (1/1) ... [2018-11-07 21:00:34,771 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 21:00:34,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 21:00:34,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 21:00:34,772 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 21:00:34,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:00:34" (1/1) ... [2018-11-07 21:00:34,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:00:34" (1/1) ... [2018-11-07 21:00:34,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:00:34" (1/1) ... [2018-11-07 21:00:34,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:00:34" (1/1) ... [2018-11-07 21:00:34,885 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:00:34" (1/1) ... [2018-11-07 21:00:34,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:00:34" (1/1) ... [2018-11-07 21:00:34,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:00:34" (1/1) ... [2018-11-07 21:00:34,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 21:00:34,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 21:00:34,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 21:00:34,968 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 21:00:34,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:00:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 21:00:35,042 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 21:00:35,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 21:00:35,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 21:00:35,043 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 21:00:35,043 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 21:00:35,043 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 21:00:35,043 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 21:00:35,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 21:00:35,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 21:00:35,044 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 21:00:35,044 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 21:00:43,865 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 21:00:43,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 09:00:43 BoogieIcfgContainer [2018-11-07 21:00:43,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 21:00:43,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 21:00:43,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 21:00:43,871 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 21:00:43,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 09:00:32" (1/3) ... [2018-11-07 21:00:43,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b3381eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 09:00:43, skipping insertion in model container [2018-11-07 21:00:43,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:00:34" (2/3) ... [2018-11-07 21:00:43,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b3381eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 09:00:43, skipping insertion in model container [2018-11-07 21:00:43,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 09:00:43" (3/3) ... [2018-11-07 21:00:43,875 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label11_true-unreach-call.c [2018-11-07 21:00:43,885 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 21:00:43,895 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 21:00:43,913 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 21:00:43,956 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 21:00:43,956 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 21:00:43,956 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 21:00:43,956 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 21:00:43,957 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 21:00:43,957 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 21:00:43,957 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 21:00:43,957 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 21:00:43,994 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-11-07 21:00:44,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-11-07 21:00:44,005 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:00:44,006 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 21:00:44,009 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:00:44,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:00:44,015 INFO L82 PathProgramCache]: Analyzing trace with hash -492133930, now seen corresponding path program 1 times [2018-11-07 21:00:44,017 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:00:44,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:00:44,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:00:44,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:00:44,072 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:00:44,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:00:44,658 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-11-07 21:00:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:00:44,686 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 21:00:44,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 21:00:44,687 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:00:44,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 21:00:44,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 21:00:44,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 21:00:44,712 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-11-07 21:00:53,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:00:53,141 INFO L93 Difference]: Finished difference Result 2164 states and 4009 transitions. [2018-11-07 21:00:53,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 21:00:53,143 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2018-11-07 21:00:53,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:00:53,176 INFO L225 Difference]: With dead ends: 2164 [2018-11-07 21:00:53,177 INFO L226 Difference]: Without dead ends: 1554 [2018-11-07 21:00:53,186 INFO L604 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 [2018-11-07 21:00:53,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2018-11-07 21:00:53,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1052. [2018-11-07 21:00:53,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1052 states. [2018-11-07 21:00:53,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1882 transitions. [2018-11-07 21:00:53,350 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1882 transitions. Word has length 63 [2018-11-07 21:00:53,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:00:53,351 INFO L480 AbstractCegarLoop]: Abstraction has 1052 states and 1882 transitions. [2018-11-07 21:00:53,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 21:00:53,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1882 transitions. [2018-11-07 21:00:53,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-11-07 21:00:53,359 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:00:53,359 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 21:00:53,359 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:00:53,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:00:53,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1696460921, now seen corresponding path program 1 times [2018-11-07 21:00:53,360 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:00:53,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:00:53,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:00:53,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:00:53,362 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:00:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:00:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:00:53,650 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 21:00:53,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 21:00:53,651 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:00:53,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 21:00:53,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 21:00:53,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 21:00:53,654 INFO L87 Difference]: Start difference. First operand 1052 states and 1882 transitions. Second operand 5 states. [2018-11-07 21:01:00,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:01:00,848 INFO L93 Difference]: Finished difference Result 3031 states and 5537 transitions. [2018-11-07 21:01:00,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 21:01:00,855 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2018-11-07 21:01:00,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:01:00,869 INFO L225 Difference]: With dead ends: 3031 [2018-11-07 21:01:00,870 INFO L226 Difference]: Without dead ends: 1985 [2018-11-07 21:01:00,874 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 21:01:00,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2018-11-07 21:01:00,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1959. [2018-11-07 21:01:00,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1959 states. [2018-11-07 21:01:00,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 3239 transitions. [2018-11-07 21:01:00,939 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 3239 transitions. Word has length 135 [2018-11-07 21:01:00,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:01:00,939 INFO L480 AbstractCegarLoop]: Abstraction has 1959 states and 3239 transitions. [2018-11-07 21:01:00,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 21:01:00,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 3239 transitions. [2018-11-07 21:01:00,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-11-07 21:01:00,948 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:01:00,950 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 21:01:00,950 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:01:00,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:01:00,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1297606689, now seen corresponding path program 1 times [2018-11-07 21:01:00,951 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:01:00,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:01:00,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:01:00,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:01:00,956 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:01:01,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:01:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:01:01,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:01:01,355 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:01:01,356 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 139 with the following transitions: [2018-11-07 21:01:01,358 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], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [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] [2018-11-07 21:01:01,403 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:01:01,404 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:01:01,821 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:01:02,497 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:01:02,500 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. [2018-11-07 21:01:02,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:01:02,546 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:01:02,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:01:02,546 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 21:01:02,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:01:02,562 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:01:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:01:02,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:01:07,106 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:01:07,106 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:01:07,680 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:01:07,710 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 21:01:07,710 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 11 [2018-11-07 21:01:07,711 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:01:07,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 21:01:07,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 21:01:07,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2018-11-07 21:01:07,712 INFO L87 Difference]: Start difference. First operand 1959 states and 3239 transitions. Second operand 3 states. [2018-11-07 21:01:12,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:01:12,631 INFO L93 Difference]: Finished difference Result 5693 states and 9655 transitions. [2018-11-07 21:01:12,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 21:01:12,633 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2018-11-07 21:01:12,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:01:12,663 INFO L225 Difference]: With dead ends: 5693 [2018-11-07 21:01:12,664 INFO L226 Difference]: Without dead ends: 3740 [2018-11-07 21:01:12,675 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 272 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2018-11-07 21:01:12,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3740 states. [2018-11-07 21:01:12,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3740 to 3734. [2018-11-07 21:01:12,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3734 states. [2018-11-07 21:01:12,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3734 states to 3734 states and 6077 transitions. [2018-11-07 21:01:12,797 INFO L78 Accepts]: Start accepts. Automaton has 3734 states and 6077 transitions. Word has length 138 [2018-11-07 21:01:12,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:01:12,798 INFO L480 AbstractCegarLoop]: Abstraction has 3734 states and 6077 transitions. [2018-11-07 21:01:12,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 21:01:12,799 INFO L276 IsEmpty]: Start isEmpty. Operand 3734 states and 6077 transitions. [2018-11-07 21:01:12,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-11-07 21:01:12,808 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:01:12,809 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 21:01:12,809 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:01:12,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:01:12,809 INFO L82 PathProgramCache]: Analyzing trace with hash -291330969, now seen corresponding path program 1 times [2018-11-07 21:01:12,811 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:01:12,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:01:12,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:01:12,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:01:12,813 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:01:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:01:13,156 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 21:01:13,516 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 113 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-11-07 21:01:13,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:01:13,517 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:01:13,517 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 236 with the following transitions: [2018-11-07 21:01:13,518 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], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [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], [1310], [1315], [1317], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 21:01:13,523 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:01:13,523 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:01:13,611 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:01:14,127 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:01:14,127 INFO L272 AbstractInterpreter]: Visited 104 different actions 298 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-07 21:01:14,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:01:14,165 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:01:14,165 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:01:14,165 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 21:01:14,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:01:14,182 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:01:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:01:14,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:01:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:01:14,438 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:01:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:01:14,713 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 21:01:14,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-07 21:01:14,714 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 21:01:14,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 21:01:14,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 21:01:14,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-11-07 21:01:14,715 INFO L87 Difference]: Start difference. First operand 3734 states and 6077 transitions. Second operand 9 states. [2018-11-07 21:01:21,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:01:21,078 INFO L93 Difference]: Finished difference Result 9302 states and 15012 transitions. [2018-11-07 21:01:21,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-07 21:01:21,079 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 235 [2018-11-07 21:01:21,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:01:21,102 INFO L225 Difference]: With dead ends: 9302 [2018-11-07 21:01:21,103 INFO L226 Difference]: Without dead ends: 4595 [2018-11-07 21:01:21,128 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 468 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2018-11-07 21:01:21,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4595 states. [2018-11-07 21:01:21,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4595 to 4560. [2018-11-07 21:01:21,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4560 states. [2018-11-07 21:01:21,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4560 states to 4560 states and 5524 transitions. [2018-11-07 21:01:21,242 INFO L78 Accepts]: Start accepts. Automaton has 4560 states and 5524 transitions. Word has length 235 [2018-11-07 21:01:21,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:01:21,243 INFO L480 AbstractCegarLoop]: Abstraction has 4560 states and 5524 transitions. [2018-11-07 21:01:21,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 21:01:21,243 INFO L276 IsEmpty]: Start isEmpty. Operand 4560 states and 5524 transitions. [2018-11-07 21:01:21,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-11-07 21:01:21,250 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:01:21,250 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-11-07 21:01:21,250 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:01:21,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:01:21,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1705786468, now seen corresponding path program 1 times [2018-11-07 21:01:21,251 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:01:21,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:01:21,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:01:21,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:01:21,252 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:01:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:01:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 170 proven. 19 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2018-11-07 21:01:21,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:01:21,703 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:01:21,703 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 334 with the following transitions: [2018-11-07 21:01:21,704 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], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1211], [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], [1384], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 21:01:21,710 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:01:21,710 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:01:21,800 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:01:22,424 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:01:22,424 INFO L272 AbstractInterpreter]: Visited 120 different actions 346 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-07 21:01:22,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:01:22,466 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:01:22,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:01:22,466 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 21:01:22,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:01:22,482 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:01:22,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:01:22,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:01:23,372 WARN L179 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 21 [2018-11-07 21:01:23,676 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 341 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-07 21:01:23,676 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:01:23,922 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2018-11-07 21:01:24,879 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2018-11-07 21:01:24,883 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 21:01:24,923 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 18 [2018-11-07 21:01:25,714 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 174 proven. 221 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 21:01:25,734 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 21:01:25,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2018-11-07 21:01:25,734 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 21:01:25,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-07 21:01:25,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-07 21:01:25,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2018-11-07 21:01:25,737 INFO L87 Difference]: Start difference. First operand 4560 states and 5524 transitions. Second operand 15 states. [2018-11-07 21:01:54,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:01:54,053 INFO L93 Difference]: Finished difference Result 28485 states and 37169 transitions. [2018-11-07 21:01:54,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-11-07 21:01:54,056 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 333 [2018-11-07 21:01:54,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:01:54,157 INFO L225 Difference]: With dead ends: 28485 [2018-11-07 21:01:54,157 INFO L226 Difference]: Without dead ends: 23042 [2018-11-07 21:01:54,209 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 658 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=812, Invalid=3610, Unknown=0, NotChecked=0, Total=4422 [2018-11-07 21:01:54,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23042 states. [2018-11-07 21:01:54,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23042 to 21915. [2018-11-07 21:01:54,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21915 states. [2018-11-07 21:01:54,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21915 states to 21915 states and 26181 transitions. [2018-11-07 21:01:54,826 INFO L78 Accepts]: Start accepts. Automaton has 21915 states and 26181 transitions. Word has length 333 [2018-11-07 21:01:54,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:01:54,827 INFO L480 AbstractCegarLoop]: Abstraction has 21915 states and 26181 transitions. [2018-11-07 21:01:54,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-07 21:01:54,827 INFO L276 IsEmpty]: Start isEmpty. Operand 21915 states and 26181 transitions. [2018-11-07 21:01:54,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-11-07 21:01:54,845 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:01:54,846 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 21:01:54,846 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:01:54,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:01:54,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1877965642, now seen corresponding path program 1 times [2018-11-07 21:01:54,847 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:01:54,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:01:54,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:01:54,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:01:54,848 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:01:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:01:55,683 WARN L179 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2018-11-07 21:01:55,885 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:01:55,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:01:55,886 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:01:55,886 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 412 with the following transitions: [2018-11-07 21:01:55,887 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], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [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] [2018-11-07 21:01:55,896 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:01:55,896 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:01:59,010 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:01:59,011 INFO L272 AbstractInterpreter]: Visited 356 different actions 2105 times. Merged at 5 different actions 25 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-07 21:01:59,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:01:59,049 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:01:59,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:01:59,050 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-07 21:01:59,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:01:59,066 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:01:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:01:59,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:02:01,432 WARN L179 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 38 [2018-11-07 21:02:01,926 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:02:01,926 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:02:02,339 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 36 [2018-11-07 21:02:04,969 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:02:04,989 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 21:02:04,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2018-11-07 21:02:04,990 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:02:04,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 21:02:04,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 21:02:04,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-11-07 21:02:04,992 INFO L87 Difference]: Start difference. First operand 21915 states and 26181 transitions. Second operand 6 states. [2018-11-07 21:02:16,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:02:16,313 INFO L93 Difference]: Finished difference Result 51684 states and 61874 transitions. [2018-11-07 21:02:16,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 21:02:16,314 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 411 [2018-11-07 21:02:16,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:02:16,413 INFO L225 Difference]: With dead ends: 51684 [2018-11-07 21:02:16,414 INFO L226 Difference]: Without dead ends: 30217 [2018-11-07 21:02:16,461 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 833 GetRequests, 816 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2018-11-07 21:02:16,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30217 states. [2018-11-07 21:02:17,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30217 to 29751. [2018-11-07 21:02:17,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29751 states. [2018-11-07 21:02:17,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29751 states to 29751 states and 35408 transitions. [2018-11-07 21:02:17,094 INFO L78 Accepts]: Start accepts. Automaton has 29751 states and 35408 transitions. Word has length 411 [2018-11-07 21:02:17,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:02:17,095 INFO L480 AbstractCegarLoop]: Abstraction has 29751 states and 35408 transitions. [2018-11-07 21:02:17,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 21:02:17,095 INFO L276 IsEmpty]: Start isEmpty. Operand 29751 states and 35408 transitions. [2018-11-07 21:02:17,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2018-11-07 21:02:17,125 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:02:17,125 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 21:02:17,126 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:02:17,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:02:17,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1258249865, now seen corresponding path program 1 times [2018-11-07 21:02:17,126 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:02:17,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:02:17,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:02:17,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:02:17,127 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:02:17,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:02:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 240 proven. 2 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2018-11-07 21:02:17,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:02:17,590 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:02:17,591 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 468 with the following transitions: [2018-11-07 21:02:17,591 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], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1211], [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], [1376], [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], [1508], [1511], [1515], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 21:02:17,594 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:02:17,595 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:02:17,699 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:02:18,515 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:02:18,515 INFO L272 AbstractInterpreter]: Visited 145 different actions 571 times. Merged at 7 different actions 25 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 26 variables. [2018-11-07 21:02:18,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:02:18,554 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:02:18,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:02:18,554 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-07 21:02:18,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:02:18,572 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:02:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:02:18,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:02:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 557 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2018-11-07 21:02:19,285 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:02:19,515 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 246 proven. 8 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2018-11-07 21:02:19,549 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 21:02:19,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2018-11-07 21:02:19,550 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:02:19,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 21:02:19,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 21:02:19,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 21:02:19,551 INFO L87 Difference]: Start difference. First operand 29751 states and 35408 transitions. Second operand 3 states. [2018-11-07 21:02:21,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:02:21,254 INFO L93 Difference]: Finished difference Result 57698 states and 68786 transitions. [2018-11-07 21:02:21,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 21:02:21,254 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 467 [2018-11-07 21:02:21,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:02:21,329 INFO L225 Difference]: With dead ends: 57698 [2018-11-07 21:02:21,329 INFO L226 Difference]: Without dead ends: 28391 [2018-11-07 21:02:21,376 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 937 GetRequests, 930 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 21:02:21,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28391 states. [2018-11-07 21:02:21,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28391 to 28387. [2018-11-07 21:02:21,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28387 states. [2018-11-07 21:02:21,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28387 states to 28387 states and 33644 transitions. [2018-11-07 21:02:21,856 INFO L78 Accepts]: Start accepts. Automaton has 28387 states and 33644 transitions. Word has length 467 [2018-11-07 21:02:21,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:02:21,857 INFO L480 AbstractCegarLoop]: Abstraction has 28387 states and 33644 transitions. [2018-11-07 21:02:21,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 21:02:21,857 INFO L276 IsEmpty]: Start isEmpty. Operand 28387 states and 33644 transitions. [2018-11-07 21:02:21,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2018-11-07 21:02:21,887 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:02:21,888 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 21:02:21,888 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:02:21,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:02:21,889 INFO L82 PathProgramCache]: Analyzing trace with hash -404401180, now seen corresponding path program 1 times [2018-11-07 21:02:21,889 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:02:21,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:02:21,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:02:21,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:02:21,891 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:02:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:02:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 166 proven. 180 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2018-11-07 21:02:22,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:02:22,446 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:02:22,447 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 488 with the following transitions: [2018-11-07 21:02:22,447 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], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [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], [1655], [1658], [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] [2018-11-07 21:02:22,450 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:02:22,451 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:02:22,503 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:02:24,545 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:02:24,546 INFO L272 AbstractInterpreter]: Visited 185 different actions 1288 times. Merged at 8 different actions 62 times. Widened at 1 different actions 3 times. Found 11 fixpoints after 3 different actions. Largest state had 26 variables. [2018-11-07 21:02:24,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:02:24,573 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:02:24,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:02:24,573 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-07 21:02:24,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:02:24,585 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:02:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:02:24,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:02:25,012 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 418 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-07 21:02:25,013 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:02:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 418 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-07 21:02:25,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 21:02:25,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 14 [2018-11-07 21:02:25,385 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 21:02:25,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 21:02:25,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 21:02:25,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2018-11-07 21:02:25,387 INFO L87 Difference]: Start difference. First operand 28387 states and 33644 transitions. Second operand 12 states. [2018-11-07 21:02:41,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:02:41,808 INFO L93 Difference]: Finished difference Result 76065 states and 91810 transitions. [2018-11-07 21:02:41,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-11-07 21:02:41,809 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 487 [2018-11-07 21:02:41,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:02:41,929 INFO L225 Difference]: With dead ends: 76065 [2018-11-07 21:02:41,929 INFO L226 Difference]: Without dead ends: 48125 [2018-11-07 21:02:41,988 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1064 GetRequests, 1006 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=611, Invalid=2695, Unknown=0, NotChecked=0, Total=3306 [2018-11-07 21:02:42,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48125 states. [2018-11-07 21:02:42,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48125 to 45928. [2018-11-07 21:02:42,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45928 states. [2018-11-07 21:02:42,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45928 states to 45928 states and 54069 transitions. [2018-11-07 21:02:42,707 INFO L78 Accepts]: Start accepts. Automaton has 45928 states and 54069 transitions. Word has length 487 [2018-11-07 21:02:42,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:02:42,708 INFO L480 AbstractCegarLoop]: Abstraction has 45928 states and 54069 transitions. [2018-11-07 21:02:42,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-07 21:02:42,708 INFO L276 IsEmpty]: Start isEmpty. Operand 45928 states and 54069 transitions. [2018-11-07 21:02:42,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2018-11-07 21:02:42,742 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:02:42,743 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 21:02:42,743 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:02:42,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:02:42,744 INFO L82 PathProgramCache]: Analyzing trace with hash -73523263, now seen corresponding path program 1 times [2018-11-07 21:02:42,744 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:02:42,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:02:42,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:02:42,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:02:42,745 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:02:42,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:02:43,748 WARN L179 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-11-07 21:02:43,943 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-11-07 21:02:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 237 proven. 462 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-07 21:02:45,690 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:02:45,690 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:02:45,690 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 566 with the following transitions: [2018-11-07 21:02:45,690 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], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1211], [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], [1655], [1659], [1663], [1667], [1678], [1681], [1686], [1688], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1720], [1725], [1727], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 21:02:45,694 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:02:45,694 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:02:45,771 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:02:46,670 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:02:46,670 INFO L272 AbstractInterpreter]: Visited 187 different actions 735 times. Merged at 7 different actions 24 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-07 21:02:46,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:02:46,707 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:02:46,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:02:46,707 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 21:02:46,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:02:46,721 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:02:46,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:02:46,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:02:47,501 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 21 [2018-11-07 21:02:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 540 proven. 55 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-11-07 21:02:48,505 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:02:49,000 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2018-11-07 21:02:49,062 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 108 [2018-11-07 21:02:50,152 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2018-11-07 21:02:51,233 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 239 proven. 460 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-07 21:02:51,254 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 21:02:51,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 30 [2018-11-07 21:02:51,254 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 21:02:51,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-07 21:02:51,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-07 21:02:51,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2018-11-07 21:02:51,256 INFO L87 Difference]: Start difference. First operand 45928 states and 54069 transitions. Second operand 22 states. [2018-11-07 21:02:54,778 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2018-11-07 21:02:56,822 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2018-11-07 21:02:59,742 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2018-11-07 21:03:00,179 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 16 [2018-11-07 21:03:01,999 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2018-11-07 21:03:06,594 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2018-11-07 21:03:09,940 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2018-11-07 21:03:10,190 WARN L179 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2018-11-07 21:03:11,917 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2018-11-07 21:03:12,921 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2018-11-07 21:03:13,267 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 31 [2018-11-07 21:03:18,630 WARN L179 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2018-11-07 21:03:21,076 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2018-11-07 21:03:25,366 WARN L179 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-11-07 21:03:30,230 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2018-11-07 21:03:30,974 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2018-11-07 21:03:32,041 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2018-11-07 21:03:40,513 WARN L179 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 46 [2018-11-07 21:03:45,648 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2018-11-07 21:04:02,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:04:02,718 INFO L93 Difference]: Finished difference Result 163262 states and 211714 transitions. [2018-11-07 21:04:02,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2018-11-07 21:04:02,718 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 565 [2018-11-07 21:04:02,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:04:03,601 INFO L225 Difference]: With dead ends: 163262 [2018-11-07 21:04:03,602 INFO L226 Difference]: Without dead ends: 110884 [2018-11-07 21:04:03,770 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1409 GetRequests, 1223 SyntacticMatches, 5 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12623 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=5204, Invalid=28102, Unknown=0, NotChecked=0, Total=33306 [2018-11-07 21:04:03,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110884 states. [2018-11-07 21:04:05,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110884 to 101792. [2018-11-07 21:04:05,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101792 states. [2018-11-07 21:04:05,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101792 states to 101792 states and 125627 transitions. [2018-11-07 21:04:05,985 INFO L78 Accepts]: Start accepts. Automaton has 101792 states and 125627 transitions. Word has length 565 [2018-11-07 21:04:05,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:04:05,985 INFO L480 AbstractCegarLoop]: Abstraction has 101792 states and 125627 transitions. [2018-11-07 21:04:05,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-07 21:04:05,986 INFO L276 IsEmpty]: Start isEmpty. Operand 101792 states and 125627 transitions. [2018-11-07 21:04:06,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2018-11-07 21:04:06,021 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:04:06,021 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 21:04:06,022 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:04:06,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:04:06,022 INFO L82 PathProgramCache]: Analyzing trace with hash -735551284, now seen corresponding path program 1 times [2018-11-07 21:04:06,022 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:04:06,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:04:06,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:04:06,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:04:06,023 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:04:06,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:04:06,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 604 proven. 71 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2018-11-07 21:04:06,734 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:04:06,734 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:04:06,735 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 608 with the following transitions: [2018-11-07 21:04:06,735 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], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1211], [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], [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], [1478], [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], [1681], [1686], [1688], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 21:04:06,738 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:04:06,738 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:04:06,783 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:04:08,892 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:04:08,892 INFO L272 AbstractInterpreter]: Visited 179 different actions 1263 times. Merged at 10 different actions 79 times. Widened at 1 different actions 2 times. Found 24 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-07 21:04:08,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:04:08,927 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:04:08,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:04:08,927 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 21:04:08,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:04:08,938 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:04:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:04:09,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:04:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 820 proven. 2 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2018-11-07 21:04:09,439 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:04:09,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 604 proven. 71 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2018-11-07 21:04:09,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 21:04:09,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 10 [2018-11-07 21:04:09,789 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 21:04:09,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 21:04:09,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 21:04:09,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-11-07 21:04:09,791 INFO L87 Difference]: Start difference. First operand 101792 states and 125627 transitions. Second operand 8 states. [2018-11-07 21:04:17,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:04:17,451 INFO L93 Difference]: Finished difference Result 219778 states and 275724 transitions. [2018-11-07 21:04:17,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-07 21:04:17,452 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 607 [2018-11-07 21:04:17,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:04:17,828 INFO L225 Difference]: With dead ends: 219778 [2018-11-07 21:04:17,828 INFO L226 Difference]: Without dead ends: 119077 [2018-11-07 21:04:18,040 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1233 GetRequests, 1218 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2018-11-07 21:04:18,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119077 states. Received shutdown request... [2018-11-07 21:04:18,951 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 21:04:18,955 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 21:04:18,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 09:04:18 BoogieIcfgContainer [2018-11-07 21:04:18,956 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 21:04:18,957 INFO L168 Benchmark]: Toolchain (without parser) took 226099.87 ms. Allocated memory was 1.5 GB in the beginning and 3.8 GB in the end (delta: 2.3 GB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -64.0 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. [2018-11-07 21:04:18,958 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 21:04:18,958 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1636.70 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: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-11-07 21:04:18,959 INFO L168 Benchmark]: Boogie Procedure Inliner took 274.76 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 792.7 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -973.2 MB). Peak memory consumption was 42.5 MB. Max. memory is 7.1 GB. [2018-11-07 21:04:18,960 INFO L168 Benchmark]: Boogie Preprocessor took 195.18 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2018-11-07 21:04:18,961 INFO L168 Benchmark]: RCFGBuilder took 8899.47 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 453.0 MB). Peak memory consumption was 453.0 MB. Max. memory is 7.1 GB. [2018-11-07 21:04:18,963 INFO L168 Benchmark]: TraceAbstraction took 215088.15 ms. Allocated memory was 2.3 GB in the beginning and 3.8 GB in the end (delta: 1.5 GB). Free memory was 1.8 GB in the beginning and 1.5 GB in the end (delta: 305.2 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-11-07 21:04:18,972 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 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1636.70 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: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 274.76 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 792.7 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -973.2 MB). Peak memory consumption was 42.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 195.18 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8899.47 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 453.0 MB). Peak memory consumption was 453.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 215088.15 ms. Allocated memory was 2.3 GB in the beginning and 3.8 GB in the end (delta: 1.5 GB). Free memory was 1.8 GB in the beginning and 1.5 GB in the end (delta: 305.2 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 176]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 176). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 215.0s OverallTime, 10 OverallIterations, 6 TraceHistogramMax, 166.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2516 SDtfs, 48655 SDslu, 5087 SDs, 0 SdLazy, 84507 SolverSat, 14022 SolverUnsat, 265 SolverUnknown, 0 SolverNotchecked, 121.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6987 GetRequests, 6597 SyntacticMatches, 25 SemanticMatches, 365 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14995 ImplicationChecksByTransitivity, 31.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=101792occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 12.0s AbstIntTime, 8 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 6.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 13455 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 26.0s InterpolantComputationTime, 6684 NumberOfCodeBlocks, 6684 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 9901 ConstructedInterpolants, 611 QuantifiedInterpolants, 26678345 SizeOfPredicates, 32 NumberOfNonLiveVariables, 5071 ConjunctsInSsa, 70 ConjunctsInUnsatCore, 26 InterpolantComputations, 5 PerfectInterpolantSequences, 9804/11588 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown