java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label48_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 11:50:13,947 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 11:50:13,950 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 11:50:13,966 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 11:50:13,967 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 11:50:13,968 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 11:50:13,970 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 11:50:13,972 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 11:50:13,974 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 11:50:13,976 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 11:50:13,978 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 11:50:13,978 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 11:50:13,979 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 11:50:13,982 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 11:50:13,990 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 11:50:13,991 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 11:50:13,992 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 11:50:13,995 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 11:50:13,999 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 11:50:14,001 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 11:50:14,002 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 11:50:14,004 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 11:50:14,008 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 11:50:14,009 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 11:50:14,009 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 11:50:14,010 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 11:50:14,011 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 11:50:14,012 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 11:50:14,013 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 11:50:14,014 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 11:50:14,015 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 11:50:14,016 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 11:50:14,016 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 11:50:14,016 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 11:50:14,018 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 11:50:14,019 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 11:50:14,019 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-11-07 11:50:14,046 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 11:50:14,046 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 11:50:14,047 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 11:50:14,047 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 11:50:14,047 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 11:50:14,047 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 11:50:14,050 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 11:50:14,051 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 11:50:14,051 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 11:50:14,051 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 11:50:14,051 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 11:50:14,051 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 11:50:14,052 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 11:50:14,052 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 11:50:14,052 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 11:50:14,053 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 11:50:14,054 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 11:50:14,054 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 11:50:14,054 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 11:50:14,054 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 11:50:14,054 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 11:50:14,055 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 11:50:14,055 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 11:50:14,055 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 11:50:14,055 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 11:50:14,055 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 11:50:14,055 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 11:50:14,056 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 11:50:14,056 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 11:50:14,056 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 11:50:14,056 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 11:50:14,057 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 11:50:14,057 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 11:50:14,057 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 11:50:14,105 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 11:50:14,118 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 11:50:14,123 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 11:50:14,125 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 11:50:14,125 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 11:50:14,126 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label48_false-unreach-call.c [2018-11-07 11:50:14,181 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17dd18e1f/9b4fb0b763f64807982fe8a22aa4c3ed/FLAGc2d1c8f23 [2018-11-07 11:50:14,901 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 11:50:14,902 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label48_false-unreach-call.c [2018-11-07 11:50:14,933 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17dd18e1f/9b4fb0b763f64807982fe8a22aa4c3ed/FLAGc2d1c8f23 [2018-11-07 11:50:14,954 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17dd18e1f/9b4fb0b763f64807982fe8a22aa4c3ed [2018-11-07 11:50:14,965 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 11:50:14,967 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 11:50:14,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 11:50:14,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 11:50:14,973 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 11:50:14,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 11:50:14" (1/1) ... [2018-11-07 11:50:14,977 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f1109e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:50:14, skipping insertion in model container [2018-11-07 11:50:14,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 11:50:14" (1/1) ... [2018-11-07 11:50:14,989 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 11:50:15,153 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 11:50:16,411 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 11:50:16,416 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 11:50:17,023 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 11:50:17,057 INFO L193 MainTranslator]: Completed translation [2018-11-07 11:50:17,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:50:17 WrapperNode [2018-11-07 11:50:17,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 11:50:17,059 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 11:50:17,059 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 11:50:17,059 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 11:50:17,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:50:17" (1/1) ... [2018-11-07 11:50:17,405 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:50:17" (1/1) ... [2018-11-07 11:50:17,415 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 11:50:17,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 11:50:17,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 11:50:17,415 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 11:50:17,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:50:17" (1/1) ... [2018-11-07 11:50:17,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:50:17" (1/1) ... [2018-11-07 11:50:17,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:50:17" (1/1) ... [2018-11-07 11:50:17,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:50:17" (1/1) ... [2018-11-07 11:50:17,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:50:17" (1/1) ... [2018-11-07 11:50:17,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:50:17" (1/1) ... [2018-11-07 11:50:17,619 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:50:17" (1/1) ... [2018-11-07 11:50:17,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 11:50:17,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 11:50:17,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 11:50:17,651 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 11:50:17,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:50:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 11:50:17,718 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 11:50:17,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 11:50:17,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 11:50:17,719 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-11-07 11:50:17,719 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-11-07 11:50:17,719 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-11-07 11:50:17,720 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-11-07 11:50:17,720 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 11:50:17,720 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 11:50:17,720 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 11:50:17,720 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 11:50:17,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 11:50:17,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 11:50:17,722 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 11:50:17,722 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 11:50:25,568 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 11:50:25,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 11:50:25 BoogieIcfgContainer [2018-11-07 11:50:25,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 11:50:25,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 11:50:25,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 11:50:25,573 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 11:50:25,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 11:50:14" (1/3) ... [2018-11-07 11:50:25,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d08ddc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 11:50:25, skipping insertion in model container [2018-11-07 11:50:25,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:50:17" (2/3) ... [2018-11-07 11:50:25,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d08ddc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 11:50:25, skipping insertion in model container [2018-11-07 11:50:25,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 11:50:25" (3/3) ... [2018-11-07 11:50:25,577 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label48_false-unreach-call.c [2018-11-07 11:50:25,587 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 11:50:25,597 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 11:50:25,615 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 11:50:25,660 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 11:50:25,660 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 11:50:25,660 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 11:50:25,660 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 11:50:25,661 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 11:50:25,661 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 11:50:25,661 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 11:50:25,661 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 11:50:25,700 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states. [2018-11-07 11:50:25,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-07 11:50:25,707 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 11:50:25,708 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 11:50:25,710 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 11:50:25,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 11:50:25,717 INFO L82 PathProgramCache]: Analyzing trace with hash -2042668093, now seen corresponding path program 1 times [2018-11-07 11:50:25,719 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 11:50:25,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 11:50:25,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 11:50:25,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 11:50:25,778 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 11:50:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 11:50:26,159 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 11:50:26,162 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 11:50:26,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 11:50:26,162 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 11:50:26,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 11:50:26,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 11:50:26,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 11:50:26,212 INFO L87 Difference]: Start difference. First operand 840 states. Second operand 3 states. [2018-11-07 11:50:33,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 11:50:33,817 INFO L93 Difference]: Finished difference Result 2446 states and 4700 transitions. [2018-11-07 11:50:33,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 11:50:33,819 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2018-11-07 11:50:33,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 11:50:33,865 INFO L225 Difference]: With dead ends: 2446 [2018-11-07 11:50:33,865 INFO L226 Difference]: Without dead ends: 1604 [2018-11-07 11:50:33,880 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 11:50:33,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2018-11-07 11:50:34,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1604. [2018-11-07 11:50:34,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1604 states. [2018-11-07 11:50:34,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2909 transitions. [2018-11-07 11:50:34,058 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2909 transitions. Word has length 17 [2018-11-07 11:50:34,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 11:50:34,059 INFO L480 AbstractCegarLoop]: Abstraction has 1604 states and 2909 transitions. [2018-11-07 11:50:34,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 11:50:34,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2909 transitions. [2018-11-07 11:50:34,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-11-07 11:50:34,066 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 11:50:34,066 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 11:50:34,067 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 11:50:34,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 11:50:34,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1495198716, now seen corresponding path program 1 times [2018-11-07 11:50:34,067 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 11:50:34,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 11:50:34,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 11:50:34,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 11:50:34,071 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 11:50:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 11:50:34,485 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 11:50:34,692 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 11:50:34,692 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 11:50:34,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 11:50:34,692 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 11:50:34,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 11:50:34,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 11:50:34,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 11:50:34,695 INFO L87 Difference]: Start difference. First operand 1604 states and 2909 transitions. Second operand 5 states. [2018-11-07 11:50:45,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 11:50:45,317 INFO L93 Difference]: Finished difference Result 4818 states and 8826 transitions. [2018-11-07 11:50:45,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 11:50:45,324 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 91 [2018-11-07 11:50:45,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 11:50:45,350 INFO L225 Difference]: With dead ends: 4818 [2018-11-07 11:50:45,350 INFO L226 Difference]: Without dead ends: 3220 [2018-11-07 11:50:45,355 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 11:50:45,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2018-11-07 11:50:45,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 3186. [2018-11-07 11:50:45,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3186 states. [2018-11-07 11:50:45,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 5594 transitions. [2018-11-07 11:50:45,487 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 5594 transitions. Word has length 91 [2018-11-07 11:50:45,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 11:50:45,487 INFO L480 AbstractCegarLoop]: Abstraction has 3186 states and 5594 transitions. [2018-11-07 11:50:45,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 11:50:45,490 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 5594 transitions. [2018-11-07 11:50:45,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-11-07 11:50:45,498 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 11:50:45,498 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 11:50:45,499 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 11:50:45,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 11:50:45,499 INFO L82 PathProgramCache]: Analyzing trace with hash -853421323, now seen corresponding path program 1 times [2018-11-07 11:50:45,499 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 11:50:45,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 11:50:45,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 11:50:45,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 11:50:45,500 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 11:50:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 11:50:45,759 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 11:50:45,759 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 11:50:45,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 11:50:45,760 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 11:50:45,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 11:50:45,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 11:50:45,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-07 11:50:45,761 INFO L87 Difference]: Start difference. First operand 3186 states and 5594 transitions. Second operand 5 states. [2018-11-07 11:50:56,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 11:50:56,230 INFO L93 Difference]: Finished difference Result 11103 states and 19726 transitions. [2018-11-07 11:50:56,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 11:50:56,230 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 96 [2018-11-07 11:50:56,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 11:50:56,287 INFO L225 Difference]: With dead ends: 11103 [2018-11-07 11:50:56,287 INFO L226 Difference]: Without dead ends: 7923 [2018-11-07 11:50:56,307 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 11:50:56,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7923 states. [2018-11-07 11:50:56,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7923 to 7892. [2018-11-07 11:50:56,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7892 states. [2018-11-07 11:50:56,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7892 states to 7892 states and 11680 transitions. [2018-11-07 11:50:56,641 INFO L78 Accepts]: Start accepts. Automaton has 7892 states and 11680 transitions. Word has length 96 [2018-11-07 11:50:56,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 11:50:56,642 INFO L480 AbstractCegarLoop]: Abstraction has 7892 states and 11680 transitions. [2018-11-07 11:50:56,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 11:50:56,642 INFO L276 IsEmpty]: Start isEmpty. Operand 7892 states and 11680 transitions. [2018-11-07 11:50:56,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-11-07 11:50:56,645 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 11:50:56,645 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 11:50:56,645 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 11:50:56,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 11:50:56,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1678016379, now seen corresponding path program 1 times [2018-11-07 11:50:56,646 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 11:50:56,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 11:50:56,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 11:50:56,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 11:50:56,647 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 11:50:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 11:50:56,992 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 11:50:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 11:50:57,208 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 11:50:57,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 11:50:57,208 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 11:50:57,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 11:50:57,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 11:50:57,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 11:50:57,210 INFO L87 Difference]: Start difference. First operand 7892 states and 11680 transitions. Second operand 6 states. [2018-11-07 11:51:06,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 11:51:06,693 INFO L93 Difference]: Finished difference Result 23571 states and 35381 transitions. [2018-11-07 11:51:06,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 11:51:06,693 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2018-11-07 11:51:06,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 11:51:06,767 INFO L225 Difference]: With dead ends: 23571 [2018-11-07 11:51:06,767 INFO L226 Difference]: Without dead ends: 15685 [2018-11-07 11:51:06,806 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 11:51:06,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15685 states. [2018-11-07 11:51:07,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15685 to 15608. [2018-11-07 11:51:07,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15608 states. [2018-11-07 11:51:07,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15608 states to 15608 states and 20981 transitions. [2018-11-07 11:51:07,151 INFO L78 Accepts]: Start accepts. Automaton has 15608 states and 20981 transitions. Word has length 104 [2018-11-07 11:51:07,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 11:51:07,152 INFO L480 AbstractCegarLoop]: Abstraction has 15608 states and 20981 transitions. [2018-11-07 11:51:07,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 11:51:07,152 INFO L276 IsEmpty]: Start isEmpty. Operand 15608 states and 20981 transitions. [2018-11-07 11:51:07,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-11-07 11:51:07,164 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 11:51:07,164 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 11:51:07,164 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 11:51:07,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 11:51:07,165 INFO L82 PathProgramCache]: Analyzing trace with hash 306160881, now seen corresponding path program 1 times [2018-11-07 11:51:07,165 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 11:51:07,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 11:51:07,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 11:51:07,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 11:51:07,166 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 11:51:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 11:51:07,488 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 11:51:07,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 11:51:07,525 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 11:51:07,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 11:51:07,525 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 11:51:07,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 11:51:07,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 11:51:07,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 11:51:07,527 INFO L87 Difference]: Start difference. First operand 15608 states and 20981 transitions. Second operand 6 states. [2018-11-07 11:51:13,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 11:51:13,609 INFO L93 Difference]: Finished difference Result 34584 states and 47580 transitions. [2018-11-07 11:51:13,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 11:51:13,610 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2018-11-07 11:51:13,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 11:51:13,671 INFO L225 Difference]: With dead ends: 34584 [2018-11-07 11:51:13,671 INFO L226 Difference]: Without dead ends: 18982 [2018-11-07 11:51:13,716 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 11:51:13,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18982 states. [2018-11-07 11:51:14,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18982 to 18912. [2018-11-07 11:51:14,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18912 states. [2018-11-07 11:51:14,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18912 states to 18912 states and 24328 transitions. [2018-11-07 11:51:14,279 INFO L78 Accepts]: Start accepts. Automaton has 18912 states and 24328 transitions. Word has length 142 [2018-11-07 11:51:14,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 11:51:14,280 INFO L480 AbstractCegarLoop]: Abstraction has 18912 states and 24328 transitions. [2018-11-07 11:51:14,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 11:51:14,280 INFO L276 IsEmpty]: Start isEmpty. Operand 18912 states and 24328 transitions. [2018-11-07 11:51:14,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-11-07 11:51:14,285 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 11:51:14,285 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 11:51:14,286 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 11:51:14,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 11:51:14,286 INFO L82 PathProgramCache]: Analyzing trace with hash 59420808, now seen corresponding path program 1 times [2018-11-07 11:51:14,286 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 11:51:14,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 11:51:14,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 11:51:14,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 11:51:14,287 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 11:51:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 11:51:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 69 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-07 11:51:14,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 11:51:14,740 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 11:51:14,741 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 181 with the following transitions: [2018-11-07 11:51:14,744 INFO L202 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1903], [1905], [1908], [1916], [1924], [1932], [1940], [1948], [1956], [1964], [1972], [1980], [1988], [1996], [2004], [2012], [2020], [2028], [2036], [2044], [2052], [2060], [2068], [2076], [2084], [2092], [2100], [2108], [2116], [2124], [2132], [2140], [2148], [2156], [2164], [2172], [2180], [2188], [2196], [2204], [2212], [2220], [2228], [2236], [2244], [2252], [2260], [2268], [2276], [2284], [2292], [2300], [2308], [2316], [2324], [2332], [2340], [2348], [2356], [2361], [2365], [2369], [2373], [2377], [2381], [2384], [2385], [2389], [2393], [2397], [2401], [2405], [2409], [2413], [2417], [2421], [2425], [2428], [3240], [3244], [3248], [3254], [3258], [3260], [3271], [3272], [3273], [3275], [3276] [2018-11-07 11:51:14,814 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 11:51:14,815 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 11:51:15,677 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 11:51:15,686 INFO L272 AbstractInterpreter]: Visited 96 different actions 184 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-07 11:51:15,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 11:51:15,735 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 11:51:15,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 11:51:15,735 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 11:51:15,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 11:51:15,751 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 11:51:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 11:51:15,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 11:51:16,107 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-07 11:51:16,107 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 11:51:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-07 11:51:16,822 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 11:51:16,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2018-11-07 11:51:16,822 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 11:51:16,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 11:51:16,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 11:51:16,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-07 11:51:16,824 INFO L87 Difference]: Start difference. First operand 18912 states and 24328 transitions. Second operand 5 states. [2018-11-07 11:51:25,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 11:51:25,667 INFO L93 Difference]: Finished difference Result 49095 states and 65563 transitions. [2018-11-07 11:51:25,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 11:51:25,675 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 180 [2018-11-07 11:51:25,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 11:51:25,830 INFO L225 Difference]: With dead ends: 49095 [2018-11-07 11:51:26,127 INFO L226 Difference]: Without dead ends: 30189 [2018-11-07 11:51:26,183 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 358 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-11-07 11:51:26,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30189 states. [2018-11-07 11:51:26,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30189 to 28760. [2018-11-07 11:51:26,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28760 states. [2018-11-07 11:51:26,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28760 states to 28760 states and 36664 transitions. [2018-11-07 11:51:26,822 INFO L78 Accepts]: Start accepts. Automaton has 28760 states and 36664 transitions. Word has length 180 [2018-11-07 11:51:26,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 11:51:26,823 INFO L480 AbstractCegarLoop]: Abstraction has 28760 states and 36664 transitions. [2018-11-07 11:51:26,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 11:51:26,823 INFO L276 IsEmpty]: Start isEmpty. Operand 28760 states and 36664 transitions. [2018-11-07 11:51:26,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-11-07 11:51:26,829 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 11:51:26,829 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1] [2018-11-07 11:51:26,830 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 11:51:26,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 11:51:26,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1084281443, now seen corresponding path program 1 times [2018-11-07 11:51:26,830 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 11:51:26,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 11:51:26,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 11:51:26,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 11:51:26,832 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 11:51:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 11:51:27,137 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 11:51:27,400 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 20 proven. 82 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 11:51:27,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 11:51:27,400 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 11:51:27,400 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 208 with the following transitions: [2018-11-07 11:51:27,401 INFO L202 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1903], [1905], [1908], [1916], [1924], [1932], [1940], [1948], [1956], [1964], [1972], [1980], [1988], [1996], [2004], [2012], [2020], [2028], [2036], [2044], [2052], [2060], [2068], [2076], [2084], [2092], [2100], [2108], [2116], [2124], [2132], [2140], [2148], [2156], [2164], [2172], [2180], [2188], [2196], [2204], [2212], [2220], [2228], [2236], [2244], [2252], [2260], [2268], [2276], [2284], [2292], [2300], [2308], [2316], [2324], [2332], [2340], [2348], [2356], [2361], [2365], [2369], [2373], [2377], [2381], [2385], [2389], [2393], [2397], [2401], [2405], [2409], [2413], [2417], [2421], [2425], [2428], [2429], [2433], [2437], [2441], [2445], [2449], [2453], [2457], [2461], [2465], [2469], [2473], [2477], [2481], [2485], [2489], [2492], [3240], [3244], [3248], [3254], [3258], [3260], [3271], [3272], [3273], [3275], [3276] [2018-11-07 11:51:27,407 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 11:51:27,408 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 11:51:27,573 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 11:51:27,573 INFO L272 AbstractInterpreter]: Visited 108 different actions 108 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-11-07 11:51:27,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 11:51:27,620 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 11:51:28,079 INFO L227 lantSequenceWeakener]: Weakened 198 states. On average, predicates are now at 74.89% of their original sizes. [2018-11-07 11:51:28,079 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 11:51:28,508 INFO L415 sIntCurrentIteration]: We unified 206 AI predicates to 206 [2018-11-07 11:51:28,508 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 11:51:28,509 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 11:51:28,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2018-11-07 11:51:28,510 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 11:51:28,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 11:51:28,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 11:51:28,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 11:51:28,511 INFO L87 Difference]: Start difference. First operand 28760 states and 36664 transitions. Second operand 8 states. [2018-11-07 11:51:33,729 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown