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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:42:53,761 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:42:53,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:42:53,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:42:53,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:42:53,777 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:42:53,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:42:53,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:42:53,781 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:42:53,782 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:42:53,783 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:42:53,784 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:42:53,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:42:53,786 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:42:53,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:42:53,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:42:53,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:42:53,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:42:53,796 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:42:53,800 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:42:53,801 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:42:53,802 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:42:53,804 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:42:53,804 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:42:53,807 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:42:53,807 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:42:53,807 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:42:53,808 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:42:53,808 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:42:53,809 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:42:53,810 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:42:53,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:42:53,811 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:42:53,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:42:53,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:42:53,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:42:53,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:42:53,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:42:53,814 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:42:53,815 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:42:53,819 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:42:53,820 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 [2019-10-13 21:42:53,844 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:42:53,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:42:53,846 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:42:53,847 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:42:53,847 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:42:53,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:42:53,848 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:42:53,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:42:53,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:42:53,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:42:53,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:42:53,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:42:53,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:42:53,850 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:42:53,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:42:53,851 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:42:53,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:42:53,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:42:53,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:42:53,852 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:42:53,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:42:53,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:42:53,853 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:42:53,853 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:42:53,853 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:42:53,853 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:42:53,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:42:53,854 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:42:53,854 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-13 21:42:54,128 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:42:54,147 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:42:54,151 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:42:54,154 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:42:54,154 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:42:54,155 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label54.c [2019-10-13 21:42:54,230 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2911d1339/835988ee8bad40d89e1b562bbf9d5c8f/FLAGdf16c7f6f [2019-10-13 21:42:55,056 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:42:55,059 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label54.c [2019-10-13 21:42:55,095 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2911d1339/835988ee8bad40d89e1b562bbf9d5c8f/FLAGdf16c7f6f [2019-10-13 21:42:55,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2911d1339/835988ee8bad40d89e1b562bbf9d5c8f [2019-10-13 21:42:55,602 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:42:55,604 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:42:55,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:42:55,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:42:55,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:42:55,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:42:55" (1/1) ... [2019-10-13 21:42:55,616 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32777701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:55, skipping insertion in model container [2019-10-13 21:42:55,616 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:42:55" (1/1) ... [2019-10-13 21:42:55,624 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:42:55,793 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:42:57,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:42:57,601 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:42:58,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:42:58,408 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:42:58,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:58 WrapperNode [2019-10-13 21:42:58,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:42:58,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:42:58,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:42:58,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:42:58,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:58" (1/1) ... [2019-10-13 21:42:58,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:58" (1/1) ... [2019-10-13 21:42:58,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:58" (1/1) ... [2019-10-13 21:42:58,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:58" (1/1) ... [2019-10-13 21:42:58,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:58" (1/1) ... [2019-10-13 21:42:58,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:58" (1/1) ... [2019-10-13 21:42:58,660 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:58" (1/1) ... [2019-10-13 21:42:58,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:42:58,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:42:58,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:42:58,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:42:58,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:58" (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 [2019-10-13 21:42:58,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:42:58,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:42:58,740 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 21:42:58,740 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 21:42:58,740 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 21:42:58,741 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-13 21:42:58,742 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:42:58,742 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 21:42:58,743 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 21:42:58,743 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 21:42:58,743 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-13 21:42:58,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:42:58,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:42:58,744 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:42:58,745 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:42:58,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:42:58,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:43:03,969 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:43:03,969 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 21:43:03,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:43:03 BoogieIcfgContainer [2019-10-13 21:43:03,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:43:03,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:43:03,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:43:03,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:43:03,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:42:55" (1/3) ... [2019-10-13 21:43:03,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be3c583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:43:03, skipping insertion in model container [2019-10-13 21:43:03,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:58" (2/3) ... [2019-10-13 21:43:03,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be3c583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:43:03, skipping insertion in model container [2019-10-13 21:43:03,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:43:03" (3/3) ... [2019-10-13 21:43:03,987 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem04_label54.c [2019-10-13 21:43:04,000 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:43:04,012 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:43:04,023 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:43:04,068 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:43:04,068 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:43:04,068 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:43:04,068 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:43:04,068 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:43:04,069 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:43:04,069 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:43:04,069 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:43:04,107 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states. [2019-10-13 21:43:04,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 768 [2019-10-13 21:43:04,155 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:43:04,157 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:43:04,160 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:43:04,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:43:04,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1899128935, now seen corresponding path program 1 times [2019-10-13 21:43:04,176 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:43:04,177 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870204969] [2019-10-13 21:43:04,177 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:43:04,177 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:43:04,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:43:04,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:43:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:43:06,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870204969] [2019-10-13 21:43:06,077 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:43:06,078 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:43:06,078 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611523965] [2019-10-13 21:43:06,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:43:06,084 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:43:06,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:43:06,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:43:06,101 INFO L87 Difference]: Start difference. First operand 785 states. Second operand 3 states. [2019-10-13 21:43:10,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:43:10,645 INFO L93 Difference]: Finished difference Result 2343 states and 4615 transitions. [2019-10-13 21:43:10,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:43:10,646 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 767 [2019-10-13 21:43:10,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:43:10,693 INFO L225 Difference]: With dead ends: 2343 [2019-10-13 21:43:10,693 INFO L226 Difference]: Without dead ends: 1555 [2019-10-13 21:43:10,701 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:43:10,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2019-10-13 21:43:10,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1555. [2019-10-13 21:43:10,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1555 states. [2019-10-13 21:43:10,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2871 transitions. [2019-10-13 21:43:10,849 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 2871 transitions. Word has length 767 [2019-10-13 21:43:10,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:43:10,852 INFO L462 AbstractCegarLoop]: Abstraction has 1555 states and 2871 transitions. [2019-10-13 21:43:10,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:43:10,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 2871 transitions. [2019-10-13 21:43:10,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2019-10-13 21:43:10,881 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:43:10,882 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:43:10,882 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:43:10,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:43:10,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1537899544, now seen corresponding path program 1 times [2019-10-13 21:43:10,883 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:43:10,883 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623218373] [2019-10-13 21:43:10,884 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:43:10,884 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:43:10,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:43:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:43:12,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:43:12,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623218373] [2019-10-13 21:43:12,614 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:43:12,614 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:43:12,614 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755331481] [2019-10-13 21:43:12,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:43:12,618 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:43:12,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:43:12,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:43:12,618 INFO L87 Difference]: Start difference. First operand 1555 states and 2871 transitions. Second operand 3 states. [2019-10-13 21:43:16,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:43:16,842 INFO L93 Difference]: Finished difference Result 4653 states and 8650 transitions. [2019-10-13 21:43:16,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:43:16,843 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 775 [2019-10-13 21:43:16,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:43:16,866 INFO L225 Difference]: With dead ends: 4653 [2019-10-13 21:43:16,867 INFO L226 Difference]: Without dead ends: 3103 [2019-10-13 21:43:16,871 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:43:16,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3103 states. [2019-10-13 21:43:16,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3103 to 3103. [2019-10-13 21:43:16,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3103 states. [2019-10-13 21:43:16,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3103 states to 3103 states and 5281 transitions. [2019-10-13 21:43:16,950 INFO L78 Accepts]: Start accepts. Automaton has 3103 states and 5281 transitions. Word has length 775 [2019-10-13 21:43:16,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:43:16,952 INFO L462 AbstractCegarLoop]: Abstraction has 3103 states and 5281 transitions. [2019-10-13 21:43:16,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:43:16,952 INFO L276 IsEmpty]: Start isEmpty. Operand 3103 states and 5281 transitions. [2019-10-13 21:43:16,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 841 [2019-10-13 21:43:16,967 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:43:16,967 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:43:16,968 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:43:16,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:43:16,969 INFO L82 PathProgramCache]: Analyzing trace with hash 529907634, now seen corresponding path program 1 times [2019-10-13 21:43:16,969 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:43:16,969 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779977307] [2019-10-13 21:43:16,969 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:43:16,970 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:43:16,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:43:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:43:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:43:17,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779977307] [2019-10-13 21:43:17,914 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:43:17,914 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:43:17,915 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377897611] [2019-10-13 21:43:17,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:43:17,916 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:43:17,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:43:17,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:43:17,917 INFO L87 Difference]: Start difference. First operand 3103 states and 5281 transitions. Second operand 6 states. [2019-10-13 21:43:23,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:43:23,555 INFO L93 Difference]: Finished difference Result 7888 states and 13389 transitions. [2019-10-13 21:43:23,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:43:23,556 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 840 [2019-10-13 21:43:23,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:43:23,594 INFO L225 Difference]: With dead ends: 7888 [2019-10-13 21:43:23,594 INFO L226 Difference]: Without dead ends: 4790 [2019-10-13 21:43:23,603 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:43:23,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4790 states. [2019-10-13 21:43:23,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4790 to 4763. [2019-10-13 21:43:23,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4763 states. [2019-10-13 21:43:23,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4763 states to 4763 states and 7402 transitions. [2019-10-13 21:43:23,776 INFO L78 Accepts]: Start accepts. Automaton has 4763 states and 7402 transitions. Word has length 840 [2019-10-13 21:43:23,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:43:23,776 INFO L462 AbstractCegarLoop]: Abstraction has 4763 states and 7402 transitions. [2019-10-13 21:43:23,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:43:23,777 INFO L276 IsEmpty]: Start isEmpty. Operand 4763 states and 7402 transitions. [2019-10-13 21:43:23,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 860 [2019-10-13 21:43:23,811 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:43:23,812 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:43:23,812 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:43:23,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:43:23,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1011406093, now seen corresponding path program 1 times [2019-10-13 21:43:23,813 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:43:23,814 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095576733] [2019-10-13 21:43:23,814 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:43:23,814 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:43:23,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:43:23,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:43:24,901 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 87 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:43:24,901 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095576733] [2019-10-13 21:43:24,902 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211829653] [2019-10-13 21:43:24,902 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 [2019-10-13 21:43:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:43:25,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:43:25,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:43:25,725 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:43:25,726 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:43:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:43:26,367 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1512035054] [2019-10-13 21:43:26,422 INFO L162 IcfgInterpreter]: Started Sifa with 771 locations of interest [2019-10-13 21:43:26,423 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:43:26,432 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:43:26,441 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:43:26,442 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:43:26,802 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 99 for LOIs