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_label11_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 14:37:14,944 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 14:37:14,946 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 14:37:14,958 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 14:37:14,959 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 14:37:14,960 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 14:37:14,961 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 14:37:14,963 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 14:37:14,965 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 14:37:14,965 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 14:37:14,966 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 14:37:14,967 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 14:37:14,968 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 14:37:14,969 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 14:37:14,970 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 14:37:14,970 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 14:37:14,971 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 14:37:14,973 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 14:37:14,975 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 14:37:14,977 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 14:37:14,978 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 14:37:14,979 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 14:37:14,981 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 14:37:14,982 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 14:37:14,982 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 14:37:14,983 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 14:37:14,984 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 14:37:14,985 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 14:37:14,986 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 14:37:14,987 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 14:37:14,987 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 14:37:14,988 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 14:37:14,988 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 14:37:14,988 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 14:37:14,989 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 14:37:14,990 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 14:37:14,990 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 14:37:15,006 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 14:37:15,007 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 14:37:15,007 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 14:37:15,008 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 14:37:15,008 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 14:37:15,008 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 14:37:15,008 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 14:37:15,009 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 14:37:15,009 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 14:37:15,009 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 14:37:15,009 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 14:37:15,009 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 14:37:15,010 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 14:37:15,010 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 14:37:15,010 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 14:37:15,010 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 14:37:15,011 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 14:37:15,011 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 14:37:15,011 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 14:37:15,011 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 14:37:15,011 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 14:37:15,012 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 14:37:15,012 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 14:37:15,012 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 14:37:15,012 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 14:37:15,012 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 14:37:15,013 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 14:37:15,013 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 14:37:15,013 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 14:37:15,013 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 14:37:15,013 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 14:37:15,014 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 14:37:15,014 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 14:37:15,014 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 14:37:15,057 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 14:37:15,069 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 14:37:15,073 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 14:37:15,075 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 14:37:15,075 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 14:37:15,076 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label11_true-unreach-call.c [2018-11-07 14:37:15,135 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c529c4c3f/b1ed4960caa94c55a17d6c40d5faa103/FLAGaa97738f2 [2018-11-07 14:37:15,897 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 14:37:15,898 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label11_true-unreach-call.c [2018-11-07 14:37:15,935 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c529c4c3f/b1ed4960caa94c55a17d6c40d5faa103/FLAGaa97738f2 [2018-11-07 14:37:15,954 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c529c4c3f/b1ed4960caa94c55a17d6c40d5faa103 [2018-11-07 14:37:15,967 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 14:37:15,969 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 14:37:15,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 14:37:15,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 14:37:15,978 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 14:37:15,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:37:15" (1/1) ... [2018-11-07 14:37:15,983 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@193d11b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:37:15, skipping insertion in model container [2018-11-07 14:37:15,984 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:37:15" (1/1) ... [2018-11-07 14:37:15,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 14:37:16,162 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 14:37:17,495 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 14:37:17,500 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 14:37:18,193 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 14:37:18,228 INFO L193 MainTranslator]: Completed translation [2018-11-07 14:37:18,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:37:18 WrapperNode [2018-11-07 14:37:18,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 14:37:18,230 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 14:37:18,231 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 14:37:18,231 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 14:37:18,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:37:18" (1/1) ... [2018-11-07 14:37:18,556 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:37:18" (1/1) ... [2018-11-07 14:37:18,564 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 14:37:18,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 14:37:18,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 14:37:18,565 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 14:37:18,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:37:18" (1/1) ... [2018-11-07 14:37:18,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:37:18" (1/1) ... [2018-11-07 14:37:18,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:37:18" (1/1) ... [2018-11-07 14:37:18,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:37:18" (1/1) ... [2018-11-07 14:37:18,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:37:18" (1/1) ... [2018-11-07 14:37:18,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:37:18" (1/1) ... [2018-11-07 14:37:18,818 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:37:18" (1/1) ... [2018-11-07 14:37:18,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 14:37:18,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 14:37:18,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 14:37:18,862 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 14:37:18,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:37:18" (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 14:37:18,934 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 14:37:18,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 14:37:18,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 14:37:18,935 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-11-07 14:37:18,935 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-11-07 14:37:18,935 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-11-07 14:37:18,935 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-11-07 14:37:18,935 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 14:37:18,936 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 14:37:18,936 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 14:37:18,936 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 14:37:18,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 14:37:18,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 14:37:18,938 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 14:37:18,938 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 14:37:29,453 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 14:37:29,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:37:29 BoogieIcfgContainer [2018-11-07 14:37:29,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 14:37:29,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 14:37:29,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 14:37:29,459 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 14:37:29,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:37:15" (1/3) ... [2018-11-07 14:37:29,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e6974a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:37:29, skipping insertion in model container [2018-11-07 14:37:29,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:37:18" (2/3) ... [2018-11-07 14:37:29,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e6974a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:37:29, skipping insertion in model container [2018-11-07 14:37:29,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:37:29" (3/3) ... [2018-11-07 14:37:29,463 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label11_true-unreach-call.c [2018-11-07 14:37:29,476 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 14:37:29,491 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 14:37:29,509 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 14:37:29,572 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 14:37:29,572 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 14:37:29,572 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 14:37:29,573 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 14:37:29,573 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 14:37:29,573 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 14:37:29,573 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 14:37:29,573 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 14:37:29,622 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states. [2018-11-07 14:37:29,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-11-07 14:37:29,631 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 14:37:29,632 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 14:37:29,634 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 14:37:29,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:37:29,643 INFO L82 PathProgramCache]: Analyzing trace with hash 527324292, now seen corresponding path program 1 times [2018-11-07 14:37:29,645 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 14:37:29,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:37:29,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 14:37:29,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:37:29,698 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 14:37:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 14:37:30,158 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 14:37:30,163 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 14:37:30,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 14:37:30,167 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 14:37:30,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 14:37:30,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 14:37:30,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 14:37:30,194 INFO L87 Difference]: Start difference. First operand 840 states. Second operand 3 states. [2018-11-07 14:37:37,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 14:37:37,366 INFO L93 Difference]: Finished difference Result 2446 states and 4700 transitions. [2018-11-07 14:37:37,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 14:37:37,368 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2018-11-07 14:37:37,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 14:37:37,401 INFO L225 Difference]: With dead ends: 2446 [2018-11-07 14:37:37,401 INFO L226 Difference]: Without dead ends: 1604 [2018-11-07 14:37:37,413 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 14:37:37,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2018-11-07 14:37:37,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1604. [2018-11-07 14:37:37,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1604 states. [2018-11-07 14:37:37,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 3014 transitions. [2018-11-07 14:37:37,556 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 3014 transitions. Word has length 46 [2018-11-07 14:37:37,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 14:37:37,557 INFO L480 AbstractCegarLoop]: Abstraction has 1604 states and 3014 transitions. [2018-11-07 14:37:37,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 14:37:37,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 3014 transitions. [2018-11-07 14:37:37,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-11-07 14:37:37,570 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 14:37:37,570 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:37:37,571 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 14:37:37,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:37:37,571 INFO L82 PathProgramCache]: Analyzing trace with hash 760022770, now seen corresponding path program 1 times [2018-11-07 14:37:37,571 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 14:37:37,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:37:37,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 14:37:37,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:37:37,575 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 14:37:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 14:37:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 14:37:37,960 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 14:37:37,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 14:37:37,960 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 14:37:37,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 14:37:37,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 14:37:37,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-07 14:37:37,963 INFO L87 Difference]: Start difference. First operand 1604 states and 3014 transitions. Second operand 5 states. [2018-11-07 14:37:47,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 14:37:47,989 INFO L93 Difference]: Finished difference Result 4873 states and 9168 transitions. [2018-11-07 14:37:48,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 14:37:48,000 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 116 [2018-11-07 14:37:48,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 14:37:48,024 INFO L225 Difference]: With dead ends: 4873 [2018-11-07 14:37:48,025 INFO L226 Difference]: Without dead ends: 3275 [2018-11-07 14:37:48,030 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 14:37:48,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3275 states. [2018-11-07 14:37:48,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3275 to 3241. [2018-11-07 14:37:48,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3241 states. [2018-11-07 14:37:48,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3241 states to 3241 states and 5443 transitions. [2018-11-07 14:37:48,176 INFO L78 Accepts]: Start accepts. Automaton has 3241 states and 5443 transitions. Word has length 116 [2018-11-07 14:37:48,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 14:37:48,177 INFO L480 AbstractCegarLoop]: Abstraction has 3241 states and 5443 transitions. [2018-11-07 14:37:48,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 14:37:48,177 INFO L276 IsEmpty]: Start isEmpty. Operand 3241 states and 5443 transitions. [2018-11-07 14:37:48,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-11-07 14:37:48,187 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 14:37:48,191 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:37:48,191 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 14:37:48,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:37:48,191 INFO L82 PathProgramCache]: Analyzing trace with hash -188199482, now seen corresponding path program 1 times [2018-11-07 14:37:48,192 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 14:37:48,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:37:48,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 14:37:48,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:37:48,196 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 14:37:48,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 14:37:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 14:37:48,384 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 14:37:48,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 14:37:48,385 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 14:37:48,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 14:37:48,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 14:37:48,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 14:37:48,386 INFO L87 Difference]: Start difference. First operand 3241 states and 5443 transitions. Second operand 4 states. [2018-11-07 14:37:56,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 14:37:56,120 INFO L93 Difference]: Finished difference Result 12687 states and 22045 transitions. [2018-11-07 14:37:56,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 14:37:56,123 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2018-11-07 14:37:56,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 14:37:56,181 INFO L225 Difference]: With dead ends: 12687 [2018-11-07 14:37:56,181 INFO L226 Difference]: Without dead ends: 9452 [2018-11-07 14:37:56,202 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 14:37:56,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9452 states. [2018-11-07 14:37:56,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9452 to 9452. [2018-11-07 14:37:56,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9452 states. [2018-11-07 14:37:56,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9452 states to 9452 states and 14498 transitions. [2018-11-07 14:37:56,486 INFO L78 Accepts]: Start accepts. Automaton has 9452 states and 14498 transitions. Word has length 122 [2018-11-07 14:37:56,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 14:37:56,487 INFO L480 AbstractCegarLoop]: Abstraction has 9452 states and 14498 transitions. [2018-11-07 14:37:56,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 14:37:56,487 INFO L276 IsEmpty]: Start isEmpty. Operand 9452 states and 14498 transitions. [2018-11-07 14:37:56,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-11-07 14:37:56,497 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 14:37:56,497 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:37:56,499 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 14:37:56,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:37:56,499 INFO L82 PathProgramCache]: Analyzing trace with hash -936516781, now seen corresponding path program 1 times [2018-11-07 14:37:56,499 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 14:37:56,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:37:56,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 14:37:56,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:37:56,501 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 14:37:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 14:37:57,040 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 14:37:57,041 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 14:37:57,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 14:37:57,041 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 14:37:57,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 14:37:57,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 14:37:57,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-11-07 14:37:57,043 INFO L87 Difference]: Start difference. First operand 9452 states and 14498 transitions. Second operand 6 states. [2018-11-07 14:38:11,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 14:38:11,473 INFO L93 Difference]: Finished difference Result 37986 states and 62742 transitions. [2018-11-07 14:38:11,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 14:38:11,474 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 173 [2018-11-07 14:38:11,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 14:38:11,650 INFO L225 Difference]: With dead ends: 37986 [2018-11-07 14:38:11,650 INFO L226 Difference]: Without dead ends: 28540 [2018-11-07 14:38:11,747 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-11-07 14:38:11,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28540 states. [2018-11-07 14:38:12,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28540 to 28478. [2018-11-07 14:38:12,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28478 states. [2018-11-07 14:38:12,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28478 states to 28478 states and 42747 transitions. [2018-11-07 14:38:12,531 INFO L78 Accepts]: Start accepts. Automaton has 28478 states and 42747 transitions. Word has length 173 [2018-11-07 14:38:12,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 14:38:12,532 INFO L480 AbstractCegarLoop]: Abstraction has 28478 states and 42747 transitions. [2018-11-07 14:38:12,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 14:38:12,532 INFO L276 IsEmpty]: Start isEmpty. Operand 28478 states and 42747 transitions. [2018-11-07 14:38:12,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-11-07 14:38:12,545 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 14:38:12,545 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 14:38:12,545 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 14:38:12,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:38:12,546 INFO L82 PathProgramCache]: Analyzing trace with hash -551571148, now seen corresponding path program 1 times [2018-11-07 14:38:12,546 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 14:38:12,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:38:12,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 14:38:12,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:38:12,548 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 14:38:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 14:38:12,854 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 14:38:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 78 proven. 90 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 14:38:13,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 14:38:13,006 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 14:38:13,007 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 245 with the following transitions: [2018-11-07 14:38:13,009 INFO L202 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1907], [1915], [1923], [1931], [1939], [1947], [1955], [1963], [1971], [1979], [1987], [1995], [2003], [2011], [2019], [2027], [2035], [2043], [2051], [2059], [2067], [2075], [2083], [2091], [2099], [2107], [2115], [2123], [2131], [2135], [2137], [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], [2429], [2433], [2437], [2441], [2445], [2449], [2453], [2457], [2460], [2461], [2465], [2469], [2473], [2477], [2481], [2485], [2489], [2492], [3240], [3244], [3248], [3254], [3258], [3260], [3271], [3272], [3273], [3275], [3276] [2018-11-07 14:38:13,066 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 14:38:13,067 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 14:38:13,743 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 14:38:13,745 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 14:38:13,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:38:13,788 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 14:38:14,338 INFO L227 lantSequenceWeakener]: Weakened 235 states. On average, predicates are now at 75.42% of their original sizes. [2018-11-07 14:38:14,338 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 14:38:14,829 INFO L415 sIntCurrentIteration]: We unified 243 AI predicates to 243 [2018-11-07 14:38:14,830 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 14:38:14,831 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 14:38:14,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2018-11-07 14:38:14,831 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 14:38:14,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 14:38:14,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 14:38:14,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 14:38:14,832 INFO L87 Difference]: Start difference. First operand 28478 states and 42747 transitions. Second operand 8 states. [2018-11-07 14:38:21,461 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