java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label04_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 11:44:38,795 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 11:44:38,797 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 11:44:38,815 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 11:44:38,815 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 11:44:38,817 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 11:44:38,818 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 11:44:38,820 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 11:44:38,824 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 11:44:38,825 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 11:44:38,827 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 11:44:38,827 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 11:44:38,828 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 11:44:38,829 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 11:44:38,838 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 11:44:38,839 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 11:44:38,839 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 11:44:38,844 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 11:44:38,850 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 11:44:38,855 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 11:44:38,856 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 11:44:38,858 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 11:44:38,861 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 11:44:38,861 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 11:44:38,861 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 11:44:38,862 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 11:44:38,863 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 11:44:38,867 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 11:44:38,868 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 11:44:38,871 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 11:44:38,871 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 11:44:38,874 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-27 11:44:38,876 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-10-27 11:44:38,908 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 11:44:38,908 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 11:44:38,913 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 11:44:38,913 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 11:44:38,913 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 11:44:38,913 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 11:44:38,914 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 11:44:38,914 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 11:44:38,914 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 11:44:38,914 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 11:44:38,914 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 11:44:38,915 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 11:44:38,915 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 11:44:38,916 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 11:44:38,916 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 11:44:38,916 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 11:44:38,916 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 11:44:38,916 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 11:44:38,918 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 11:44:38,918 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 11:44:38,918 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 11:44:38,918 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 11:44:38,919 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 11:44:38,919 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 11:44:38,919 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 11:44:38,919 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 11:44:38,919 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 11:44:38,920 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 11:44:38,920 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 11:44:38,920 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 11:44:38,921 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 11:44:38,921 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 11:44:38,921 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 11:44:38,921 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 11:44:38,991 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 11:44:39,005 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 11:44:39,010 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 11:44:39,011 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 11:44:39,011 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 11:44:39,012 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label04_false-unreach-call.c [2018-10-27 11:44:39,067 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/23b2f8ace/f4d011099ad34659851a863f68f35245/FLAG95b89298d [2018-10-27 11:44:39,730 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 11:44:39,736 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label04_false-unreach-call.c [2018-10-27 11:44:39,770 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/23b2f8ace/f4d011099ad34659851a863f68f35245/FLAG95b89298d [2018-10-27 11:44:39,788 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/23b2f8ace/f4d011099ad34659851a863f68f35245 [2018-10-27 11:44:39,802 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 11:44:39,804 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 11:44:39,806 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 11:44:39,806 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 11:44:39,810 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 11:44:39,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:44:39" (1/1) ... [2018-10-27 11:44:39,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f1f9d72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:39, skipping insertion in model container [2018-10-27 11:44:39,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:44:39" (1/1) ... [2018-10-27 11:44:39,825 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 11:44:39,914 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 11:44:40,707 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 11:44:40,712 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 11:44:40,996 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 11:44:41,017 INFO L193 MainTranslator]: Completed translation [2018-10-27 11:44:41,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:41 WrapperNode [2018-10-27 11:44:41,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 11:44:41,019 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 11:44:41,019 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 11:44:41,019 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 11:44:41,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:41" (1/1) ... [2018-10-27 11:44:41,075 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:41" (1/1) ... [2018-10-27 11:44:41,355 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 11:44:41,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 11:44:41,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 11:44:41,356 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 11:44:41,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:41" (1/1) ... [2018-10-27 11:44:41,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:41" (1/1) ... [2018-10-27 11:44:41,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:41" (1/1) ... [2018-10-27 11:44:41,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:41" (1/1) ... [2018-10-27 11:44:41,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:41" (1/1) ... [2018-10-27 11:44:41,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:41" (1/1) ... [2018-10-27 11:44:41,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:41" (1/1) ... [2018-10-27 11:44:41,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 11:44:41,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 11:44:41,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 11:44:41,534 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 11:44:41,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 11:44:41,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 11:44:41,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 11:44:41,609 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 11:44:41,610 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 11:44:41,610 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 11:44:41,610 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 11:44:41,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 11:44:41,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 11:44:41,611 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 11:44:41,611 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 11:44:48,223 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 11:44:48,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:44:48 BoogieIcfgContainer [2018-10-27 11:44:48,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 11:44:48,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 11:44:48,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 11:44:48,229 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 11:44:48,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:44:39" (1/3) ... [2018-10-27 11:44:48,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e8103b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:44:48, skipping insertion in model container [2018-10-27 11:44:48,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:41" (2/3) ... [2018-10-27 11:44:48,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e8103b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:44:48, skipping insertion in model container [2018-10-27 11:44:48,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:44:48" (3/3) ... [2018-10-27 11:44:48,233 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label04_false-unreach-call.c [2018-10-27 11:44:48,242 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 11:44:48,250 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 11:44:48,268 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 11:44:48,310 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 11:44:48,310 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 11:44:48,310 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 11:44:48,311 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 11:44:48,311 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 11:44:48,311 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 11:44:48,311 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 11:44:48,311 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 11:44:48,343 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-10-27 11:44:48,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-27 11:44:48,351 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:44:48,352 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] [2018-10-27 11:44:48,356 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:44:48,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:44:48,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1727147373, now seen corresponding path program 1 times [2018-10-27 11:44:48,366 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:44:48,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:44:48,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:44:48,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:44:48,419 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:44:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:44:48,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:44:48,827 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:44:48,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 11:44:48,828 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:44:48,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 11:44:48,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 11:44:48,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 11:44:48,865 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 3 states. [2018-10-27 11:44:53,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:44:53,607 INFO L93 Difference]: Finished difference Result 1156 states and 2144 transitions. [2018-10-27 11:44:53,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 11:44:53,610 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2018-10-27 11:44:53,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:44:53,637 INFO L225 Difference]: With dead ends: 1156 [2018-10-27 11:44:53,638 INFO L226 Difference]: Without dead ends: 744 [2018-10-27 11:44:53,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 11:44:53,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2018-10-27 11:44:53,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2018-10-27 11:44:53,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-10-27 11:44:53,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1317 transitions. [2018-10-27 11:44:53,771 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1317 transitions. Word has length 35 [2018-10-27 11:44:53,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:44:53,772 INFO L481 AbstractCegarLoop]: Abstraction has 744 states and 1317 transitions. [2018-10-27 11:44:53,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 11:44:53,772 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1317 transitions. [2018-10-27 11:44:53,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-27 11:44:53,781 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:44:53,782 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 11:44:53,782 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:44:53,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:44:53,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1128673264, now seen corresponding path program 1 times [2018-10-27 11:44:53,784 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:44:53,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:44:53,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:44:53,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:44:53,787 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:44:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:44:54,238 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:44:54,239 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:44:54,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 11:44:54,239 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:44:54,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 11:44:54,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 11:44:54,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-27 11:44:54,244 INFO L87 Difference]: Start difference. First operand 744 states and 1317 transitions. Second operand 6 states. [2018-10-27 11:45:09,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:45:09,648 INFO L93 Difference]: Finished difference Result 2960 states and 5492 transitions. [2018-10-27 11:45:09,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-27 11:45:09,648 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 111 [2018-10-27 11:45:09,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:45:09,680 INFO L225 Difference]: With dead ends: 2960 [2018-10-27 11:45:09,680 INFO L226 Difference]: Without dead ends: 2222 [2018-10-27 11:45:09,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-27 11:45:09,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2018-10-27 11:45:09,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 2169. [2018-10-27 11:45:09,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2169 states. [2018-10-27 11:45:09,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3669 transitions. [2018-10-27 11:45:09,811 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3669 transitions. Word has length 111 [2018-10-27 11:45:09,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:45:09,812 INFO L481 AbstractCegarLoop]: Abstraction has 2169 states and 3669 transitions. [2018-10-27 11:45:09,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 11:45:09,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3669 transitions. [2018-10-27 11:45:09,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-27 11:45:09,822 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:45:09,824 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 11:45:09,824 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:45:09,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:45:09,825 INFO L82 PathProgramCache]: Analyzing trace with hash -950142376, now seen corresponding path program 1 times [2018-10-27 11:45:09,825 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:45:09,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:45:09,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:45:09,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:45:09,827 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:45:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:45:10,144 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:45:10,144 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:45:10,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 11:45:10,145 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:45:10,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 11:45:10,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 11:45:10,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 11:45:10,146 INFO L87 Difference]: Start difference. First operand 2169 states and 3669 transitions. Second operand 6 states. [2018-10-27 11:45:16,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:45:16,376 INFO L93 Difference]: Finished difference Result 8029 states and 14212 transitions. [2018-10-27 11:45:16,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 11:45:16,379 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2018-10-27 11:45:16,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:45:16,423 INFO L225 Difference]: With dead ends: 8029 [2018-10-27 11:45:16,423 INFO L226 Difference]: Without dead ends: 5866 [2018-10-27 11:45:16,458 INFO L605 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 [2018-10-27 11:45:16,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5866 states. [2018-10-27 11:45:16,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5866 to 5815. [2018-10-27 11:45:16,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5815 states. [2018-10-27 11:45:16,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5815 states to 5815 states and 8929 transitions. [2018-10-27 11:45:16,642 INFO L78 Accepts]: Start accepts. Automaton has 5815 states and 8929 transitions. Word has length 115 [2018-10-27 11:45:16,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:45:16,642 INFO L481 AbstractCegarLoop]: Abstraction has 5815 states and 8929 transitions. [2018-10-27 11:45:16,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 11:45:16,643 INFO L276 IsEmpty]: Start isEmpty. Operand 5815 states and 8929 transitions. [2018-10-27 11:45:16,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-27 11:45:16,651 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:45:16,651 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 11:45:16,655 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:45:16,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:45:16,655 INFO L82 PathProgramCache]: Analyzing trace with hash -905675908, now seen corresponding path program 1 times [2018-10-27 11:45:16,656 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:45:16,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:45:16,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:45:16,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:45:16,657 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:45:16,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:45:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:45:16,921 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:45:16,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 11:45:16,921 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:45:16,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 11:45:16,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 11:45:16,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 11:45:16,923 INFO L87 Difference]: Start difference. First operand 5815 states and 8929 transitions. Second operand 6 states. [2018-10-27 11:45:21,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:45:21,395 INFO L93 Difference]: Finished difference Result 13785 states and 22281 transitions. [2018-10-27 11:45:21,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 11:45:21,398 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2018-10-27 11:45:21,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:45:21,450 INFO L225 Difference]: With dead ends: 13785 [2018-10-27 11:45:21,450 INFO L226 Difference]: Without dead ends: 7976 [2018-10-27 11:45:21,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 11:45:21,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7976 states. [2018-10-27 11:45:21,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7976 to 7901. [2018-10-27 11:45:21,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7901 states. [2018-10-27 11:45:21,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7901 states to 7901 states and 11540 transitions. [2018-10-27 11:45:21,713 INFO L78 Accepts]: Start accepts. Automaton has 7901 states and 11540 transitions. Word has length 117 [2018-10-27 11:45:21,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:45:21,713 INFO L481 AbstractCegarLoop]: Abstraction has 7901 states and 11540 transitions. [2018-10-27 11:45:21,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 11:45:21,714 INFO L276 IsEmpty]: Start isEmpty. Operand 7901 states and 11540 transitions. [2018-10-27 11:45:21,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-27 11:45:21,716 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:45:21,717 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 11:45:21,717 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:45:21,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:45:21,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1836053929, now seen corresponding path program 1 times [2018-10-27 11:45:21,718 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:45:21,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:45:21,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:45:21,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:45:21,720 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:45:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:45:21,948 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 11:45:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:45:21,985 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:45:21,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 11:45:21,985 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:45:21,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 11:45:21,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 11:45:21,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 11:45:21,987 INFO L87 Difference]: Start difference. First operand 7901 states and 11540 transitions. Second operand 6 states. [2018-10-27 11:45:25,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:45:25,260 INFO L93 Difference]: Finished difference Result 19229 states and 30071 transitions. [2018-10-27 11:45:25,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 11:45:25,266 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 120 [2018-10-27 11:45:25,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:45:25,344 INFO L225 Difference]: With dead ends: 19229 [2018-10-27 11:45:25,344 INFO L226 Difference]: Without dead ends: 11334 [2018-10-27 11:45:25,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 11:45:25,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11334 states. [2018-10-27 11:45:25,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11334 to 11298. [2018-10-27 11:45:25,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11298 states. [2018-10-27 11:45:25,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11298 states to 11298 states and 16070 transitions. [2018-10-27 11:45:25,688 INFO L78 Accepts]: Start accepts. Automaton has 11298 states and 16070 transitions. Word has length 120 [2018-10-27 11:45:25,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:45:25,689 INFO L481 AbstractCegarLoop]: Abstraction has 11298 states and 16070 transitions. [2018-10-27 11:45:25,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 11:45:25,689 INFO L276 IsEmpty]: Start isEmpty. Operand 11298 states and 16070 transitions. [2018-10-27 11:45:25,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-27 11:45:25,690 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:45:25,691 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 11:45:25,694 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:45:25,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:45:25,695 INFO L82 PathProgramCache]: Analyzing trace with hash 116215820, now seen corresponding path program 1 times [2018-10-27 11:45:25,695 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:45:25,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:45:25,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:45:25,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:45:25,696 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:45:25,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:45:25,965 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 11:45:26,345 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:45:26,346 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:45:26,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 11:45:26,346 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:45:26,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 11:45:26,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 11:45:26,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 11:45:26,347 INFO L87 Difference]: Start difference. First operand 11298 states and 16070 transitions. Second operand 6 states. [2018-10-27 11:45:29,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:45:29,525 INFO L93 Difference]: Finished difference Result 24375 states and 35427 transitions. [2018-10-27 11:45:29,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 11:45:29,527 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2018-10-27 11:45:29,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:45:29,594 INFO L225 Difference]: With dead ends: 24375 [2018-10-27 11:45:29,595 INFO L226 Difference]: Without dead ends: 13083 [2018-10-27 11:45:29,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 11:45:29,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13083 states. [2018-10-27 11:45:29,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13083 to 13057. [2018-10-27 11:45:29,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13057 states. [2018-10-27 11:45:29,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13057 states to 13057 states and 17285 transitions. [2018-10-27 11:45:29,986 INFO L78 Accepts]: Start accepts. Automaton has 13057 states and 17285 transitions. Word has length 125 [2018-10-27 11:45:29,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:45:29,987 INFO L481 AbstractCegarLoop]: Abstraction has 13057 states and 17285 transitions. [2018-10-27 11:45:29,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 11:45:29,987 INFO L276 IsEmpty]: Start isEmpty. Operand 13057 states and 17285 transitions. [2018-10-27 11:45:29,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-27 11:45:29,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:45:29,991 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 11:45:29,991 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:45:29,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:45:29,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1715390160, now seen corresponding path program 1 times [2018-10-27 11:45:29,991 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:45:29,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:45:29,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:45:29,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:45:29,997 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:45:30,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:45:30,236 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 11:45:30,485 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-10-27 11:45:30,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 11:45:30,485 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 11:45:30,486 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 128 with the following transitions: [2018-10-27 11:45:30,490 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [359], [361], [364], [372], [380], [388], [396], [404], [412], [420], [428], [436], [444], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [760], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-10-27 11:45:30,536 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 11:45:30,536 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 11:45:31,059 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 11:45:31,765 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 11:45:31,767 INFO L272 AbstractInterpreter]: Visited 99 different actions 284 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-27 11:45:31,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:45:31,815 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 11:45:32,378 INFO L227 lantSequenceWeakener]: Weakened 7 states. On average, predicates are now at 81.82% of their original sizes. [2018-10-27 11:45:32,379 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 11:45:33,799 INFO L415 sIntCurrentIteration]: We unified 126 AI predicates to 126 [2018-10-27 11:45:33,800 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 11:45:33,801 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 11:45:33,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [4] total 18 [2018-10-27 11:45:33,802 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:45:33,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-27 11:45:33,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-27 11:45:33,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2018-10-27 11:45:33,803 INFO L87 Difference]: Start difference. First operand 13057 states and 17285 transitions. Second operand 16 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown