java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:53:02,764 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:53:02,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:53:02,778 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:53:02,779 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:53:02,780 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:53:02,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:53:02,783 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:53:02,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:53:02,785 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:53:02,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:53:02,787 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:53:02,788 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:53:02,789 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:53:02,791 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:53:02,793 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:53:02,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:53:02,796 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:53:02,798 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:53:02,804 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:53:02,808 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:53:02,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:53:02,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:53:02,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:53:02,819 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:53:02,825 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:53:02,826 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:53:02,827 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:53:02,827 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:53:02,831 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:53:02,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:53:02,832 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:53:02,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:53:02,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:53:02,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:53:02,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:53:02,836 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:53:02,856 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:53:02,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:53:02,860 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:53:02,860 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:53:02,860 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:53:02,860 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:53:02,861 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:53:02,861 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:53:02,861 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:53:02,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:53:02,862 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:53:02,862 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:53:02,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:53:02,863 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:53:02,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:53:02,863 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:53:02,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:53:02,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:53:02,864 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:53:02,864 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:53:02,864 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:53:02,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:53:02,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:53:02,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:53:02,865 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:53:02,865 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:53:02,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:53:02,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:53:02,866 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-14 23:53:03,156 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:53:03,169 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:53:03,172 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:53:03,174 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:53:03,174 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:53:03,175 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label06.c [2019-10-14 23:53:03,253 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54ee4cdb6/6c6fc7c264cd42d999797608dd1fbed5/FLAG49e51f2fd [2019-10-14 23:53:03,818 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:53:03,819 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label06.c [2019-10-14 23:53:03,834 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54ee4cdb6/6c6fc7c264cd42d999797608dd1fbed5/FLAG49e51f2fd [2019-10-14 23:53:04,093 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54ee4cdb6/6c6fc7c264cd42d999797608dd1fbed5 [2019-10-14 23:53:04,101 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:53:04,103 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:53:04,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:53:04,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:53:04,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:53:04,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:53:04" (1/1) ... [2019-10-14 23:53:04,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23408920 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:04, skipping insertion in model container [2019-10-14 23:53:04,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:53:04" (1/1) ... [2019-10-14 23:53:04,120 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:53:04,167 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:53:04,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:53:04,722 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:53:04,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:53:04,856 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:53:04,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:04 WrapperNode [2019-10-14 23:53:04,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:53:04,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:53:04,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:53:04,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:53:04,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:04" (1/1) ... [2019-10-14 23:53:04,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:04" (1/1) ... [2019-10-14 23:53:04,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:04" (1/1) ... [2019-10-14 23:53:04,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:04" (1/1) ... [2019-10-14 23:53:04,952 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:04" (1/1) ... [2019-10-14 23:53:04,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:04" (1/1) ... [2019-10-14 23:53:04,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:04" (1/1) ... [2019-10-14 23:53:04,994 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:53:04,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:53:04,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:53:04,998 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:53:04,999 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:04" (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 [2019-10-14 23:53:05,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:53:05,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:53:05,057 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:53:05,057 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:53:05,058 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:53:05,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:53:05,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:53:05,058 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:53:05,058 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:53:05,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:53:05,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:53:06,285 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:53:06,285 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:53:06,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:53:06 BoogieIcfgContainer [2019-10-14 23:53:06,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:53:06,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:53:06,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:53:06,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:53:06,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:53:04" (1/3) ... [2019-10-14 23:53:06,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40476873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:53:06, skipping insertion in model container [2019-10-14 23:53:06,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:04" (2/3) ... [2019-10-14 23:53:06,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40476873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:53:06, skipping insertion in model container [2019-10-14 23:53:06,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:53:06" (3/3) ... [2019-10-14 23:53:06,306 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label06.c [2019-10-14 23:53:06,321 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:53:06,331 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:53:06,344 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:53:06,380 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:53:06,380 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:53:06,381 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:53:06,381 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:53:06,381 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:53:06,381 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:53:06,381 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:53:06,382 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:53:06,419 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-14 23:53:06,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-14 23:53:06,437 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:06,439 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:06,441 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:06,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:06,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1251834154, now seen corresponding path program 1 times [2019-10-14 23:53:06,458 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:06,458 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890167320] [2019-10-14 23:53:06,458 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:06,459 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:06,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:07,062 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890167320] [2019-10-14 23:53:07,063 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:07,064 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:53:07,064 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164486754] [2019-10-14 23:53:07,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:53:07,074 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:07,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:53:07,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:07,095 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-14 23:53:07,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:07,985 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-10-14 23:53:07,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:53:07,992 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 130 [2019-10-14 23:53:07,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:08,024 INFO L225 Difference]: With dead ends: 547 [2019-10-14 23:53:08,025 INFO L226 Difference]: Without dead ends: 278 [2019-10-14 23:53:08,040 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:08,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-14 23:53:08,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-14 23:53:08,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-14 23:53:08,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 394 transitions. [2019-10-14 23:53:08,158 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 394 transitions. Word has length 130 [2019-10-14 23:53:08,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:08,163 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 394 transitions. [2019-10-14 23:53:08,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:53:08,164 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 394 transitions. [2019-10-14 23:53:08,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-14 23:53:08,177 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:08,178 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:08,178 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:08,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:08,180 INFO L82 PathProgramCache]: Analyzing trace with hash -932424019, now seen corresponding path program 1 times [2019-10-14 23:53:08,180 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:08,181 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006293770] [2019-10-14 23:53:08,181 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:08,181 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:08,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:08,371 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006293770] [2019-10-14 23:53:08,371 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:08,371 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:53:08,372 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76272921] [2019-10-14 23:53:08,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:53:08,374 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:08,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:53:08,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:53:08,375 INFO L87 Difference]: Start difference. First operand 278 states and 394 transitions. Second operand 6 states. [2019-10-14 23:53:09,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:09,163 INFO L93 Difference]: Finished difference Result 840 states and 1222 transitions. [2019-10-14 23:53:09,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:53:09,168 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 140 [2019-10-14 23:53:09,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:09,175 INFO L225 Difference]: With dead ends: 840 [2019-10-14 23:53:09,175 INFO L226 Difference]: Without dead ends: 568 [2019-10-14 23:53:09,177 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:53:09,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-10-14 23:53:09,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 556. [2019-10-14 23:53:09,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2019-10-14 23:53:09,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 785 transitions. [2019-10-14 23:53:09,212 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 785 transitions. Word has length 140 [2019-10-14 23:53:09,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:09,213 INFO L462 AbstractCegarLoop]: Abstraction has 556 states and 785 transitions. [2019-10-14 23:53:09,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:53:09,213 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 785 transitions. [2019-10-14 23:53:09,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-14 23:53:09,216 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:09,216 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:09,216 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:09,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:09,217 INFO L82 PathProgramCache]: Analyzing trace with hash -188990609, now seen corresponding path program 1 times [2019-10-14 23:53:09,217 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:09,217 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186648114] [2019-10-14 23:53:09,218 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:09,218 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:09,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:09,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:09,539 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186648114] [2019-10-14 23:53:09,539 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:09,539 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:53:09,540 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630692046] [2019-10-14 23:53:09,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:53:09,541 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:09,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:53:09,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:53:09,541 INFO L87 Difference]: Start difference. First operand 556 states and 785 transitions. Second operand 5 states. [2019-10-14 23:53:10,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:10,310 INFO L93 Difference]: Finished difference Result 1205 states and 1730 transitions. [2019-10-14 23:53:10,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:53:10,312 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2019-10-14 23:53:10,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:10,316 INFO L225 Difference]: With dead ends: 1205 [2019-10-14 23:53:10,316 INFO L226 Difference]: Without dead ends: 554 [2019-10-14 23:53:10,318 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:53:10,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-10-14 23:53:10,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2019-10-14 23:53:10,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-10-14 23:53:10,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 712 transitions. [2019-10-14 23:53:10,348 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 712 transitions. Word has length 141 [2019-10-14 23:53:10,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:10,349 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 712 transitions. [2019-10-14 23:53:10,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:53:10,349 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 712 transitions. [2019-10-14 23:53:10,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-14 23:53:10,351 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:10,352 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:10,352 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:10,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:10,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1244428519, now seen corresponding path program 1 times [2019-10-14 23:53:10,353 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:10,353 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095596815] [2019-10-14 23:53:10,353 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:10,353 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:10,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:10,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:10,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:10,456 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095596815] [2019-10-14 23:53:10,456 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:10,456 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:53:10,456 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186936540] [2019-10-14 23:53:10,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:53:10,457 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:10,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:53:10,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:10,458 INFO L87 Difference]: Start difference. First operand 554 states and 712 transitions. Second operand 3 states. [2019-10-14 23:53:10,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:10,949 INFO L93 Difference]: Finished difference Result 1509 states and 1963 transitions. [2019-10-14 23:53:10,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:53:10,950 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 145 [2019-10-14 23:53:10,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:10,956 INFO L225 Difference]: With dead ends: 1509 [2019-10-14 23:53:10,956 INFO L226 Difference]: Without dead ends: 961 [2019-10-14 23:53:10,958 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:10,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2019-10-14 23:53:11,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 959. [2019-10-14 23:53:11,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2019-10-14 23:53:11,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1189 transitions. [2019-10-14 23:53:11,032 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1189 transitions. Word has length 145 [2019-10-14 23:53:11,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:11,033 INFO L462 AbstractCegarLoop]: Abstraction has 959 states and 1189 transitions. [2019-10-14 23:53:11,033 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:53:11,033 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1189 transitions. [2019-10-14 23:53:11,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-14 23:53:11,037 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:11,037 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:11,037 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:11,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:11,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1960590570, now seen corresponding path program 1 times [2019-10-14 23:53:11,038 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:11,038 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284383588] [2019-10-14 23:53:11,066 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:11,066 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:11,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:11,226 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:53:11,226 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284383588] [2019-10-14 23:53:11,227 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:11,227 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:53:11,229 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068270652] [2019-10-14 23:53:11,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:53:11,230 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:11,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:53:11,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:53:11,231 INFO L87 Difference]: Start difference. First operand 959 states and 1189 transitions. Second operand 4 states. [2019-10-14 23:53:11,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:11,983 INFO L93 Difference]: Finished difference Result 2994 states and 3801 transitions. [2019-10-14 23:53:11,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:53:11,987 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 165 [2019-10-14 23:53:11,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:12,000 INFO L225 Difference]: With dead ends: 2994 [2019-10-14 23:53:12,000 INFO L226 Difference]: Without dead ends: 2041 [2019-10-14 23:53:12,004 INFO L600 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 [2019-10-14 23:53:12,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2019-10-14 23:53:12,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1231. [2019-10-14 23:53:12,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1231 states. [2019-10-14 23:53:12,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1530 transitions. [2019-10-14 23:53:12,070 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1530 transitions. Word has length 165 [2019-10-14 23:53:12,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:12,071 INFO L462 AbstractCegarLoop]: Abstraction has 1231 states and 1530 transitions. [2019-10-14 23:53:12,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:53:12,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1530 transitions. [2019-10-14 23:53:12,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-14 23:53:12,078 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:12,078 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:12,079 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:12,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:12,114 INFO L82 PathProgramCache]: Analyzing trace with hash 425097878, now seen corresponding path program 1 times [2019-10-14 23:53:12,114 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:12,114 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76346136] [2019-10-14 23:53:12,115 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:12,115 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:12,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:12,261 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:12,261 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76346136] [2019-10-14 23:53:12,262 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055434415] [2019-10-14 23:53:12,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:53:12,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:12,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:53:12,376 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:53:12,473 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:53:12,473 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:53:12,652 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 49 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:53:12,652 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1421823117] [2019-10-14 23:53:12,665 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 177 [2019-10-14 23:53:12,734 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:53:12,735 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)