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_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:42:52,174 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:42:52,177 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:42:52,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:42:52,189 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:42:52,190 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:42:52,191 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:42:52,193 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:42:52,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:42:52,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:42:52,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:42:52,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:42:52,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:42:52,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:42:52,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:42:52,201 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:42:52,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:42:52,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:42:52,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:42:52,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:42:52,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:42:52,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:42:52,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:42:52,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:42:52,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:42:52,212 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:42:52,213 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:42:52,213 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:42:52,214 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:42:52,215 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:42:52,215 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:42:52,215 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:42:52,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:42:52,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:42:52,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:42:52,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:42:52,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:42:52,219 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:42:52,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:42:52,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:42:52,221 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:42:52,221 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 21:42:52,242 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:42:52,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:42:52,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:42:52,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:42:52,244 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:42:52,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:42:52,245 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:42:52,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:42:52,245 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:42:52,245 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:42:52,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:42:52,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:42:52,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:42:52,247 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:42:52,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:42:52,248 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:42:52,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:42:52,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:42:52,248 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:42:52,248 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:42:52,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:42:52,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:42:52,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:42:52,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:42:52,250 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:42:52,250 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:42:52,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:42:52,250 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:42:52,250 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 21:42:52,533 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:42:52,546 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:42:52,549 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:42:52,551 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:42:52,551 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:42:52,552 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label50.c [2019-10-13 21:42:52,624 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c02ca21f/906a493046874799b916ae75fdb379ef/FLAG74df128ad [2019-10-13 21:42:53,357 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:42:53,358 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label50.c [2019-10-13 21:42:53,383 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c02ca21f/906a493046874799b916ae75fdb379ef/FLAG74df128ad [2019-10-13 21:42:53,505 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c02ca21f/906a493046874799b916ae75fdb379ef [2019-10-13 21:42:53,516 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:42:53,517 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:42:53,521 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:42:53,522 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:42:53,525 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:42:53,526 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:42:53" (1/1) ... [2019-10-13 21:42:53,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35b66671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:53, skipping insertion in model container [2019-10-13 21:42:53,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:42:53" (1/1) ... [2019-10-13 21:42:53,538 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:42:53,700 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:42:55,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:42:55,104 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:42:55,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:42:55,847 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:42:55,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:55 WrapperNode [2019-10-13 21:42:55,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:42:55,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:42:55,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:42:55,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:42:55,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:55" (1/1) ... [2019-10-13 21:42:55,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:55" (1/1) ... [2019-10-13 21:42:55,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:55" (1/1) ... [2019-10-13 21:42:55,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:55" (1/1) ... [2019-10-13 21:42:56,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:55" (1/1) ... [2019-10-13 21:42:56,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:55" (1/1) ... [2019-10-13 21:42:56,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:55" (1/1) ... [2019-10-13 21:42:56,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:42:56,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:42:56,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:42:56,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:42:56,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:55" (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 21:42:56,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:42:56,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:42:56,170 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 21:42:56,170 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 21:42:56,171 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 21:42:56,171 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-13 21:42:56,172 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:42:56,173 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 21:42:56,173 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 21:42:56,173 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 21:42:56,173 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-13 21:42:56,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:42:56,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:42:56,174 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:42:56,175 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:42:56,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:42:56,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:43:01,225 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:43:01,225 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 21:43:01,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:43:01 BoogieIcfgContainer [2019-10-13 21:43:01,228 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:43:01,229 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:43:01,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:43:01,232 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:43:01,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:42:53" (1/3) ... [2019-10-13 21:43:01,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27f3df40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:43:01, skipping insertion in model container [2019-10-13 21:43:01,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:55" (2/3) ... [2019-10-13 21:43:01,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27f3df40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:43:01, skipping insertion in model container [2019-10-13 21:43:01,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:43:01" (3/3) ... [2019-10-13 21:43:01,235 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem04_label50.c [2019-10-13 21:43:01,245 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:43:01,253 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:43:01,264 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:43:01,295 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:43:01,296 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:43:01,296 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:43:01,296 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:43:01,296 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:43:01,296 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:43:01,296 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:43:01,297 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:43:01,328 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states. [2019-10-13 21:43:01,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 768 [2019-10-13 21:43:01,371 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:43:01,373 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 21:43:01,375 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:43:01,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:43:01,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1899125863, now seen corresponding path program 1 times [2019-10-13 21:43:01,390 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:43:01,391 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004135566] [2019-10-13 21:43:01,391 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:43:01,392 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:43:01,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:43:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:43:03,240 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 21:43:03,240 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004135566] [2019-10-13 21:43:03,241 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:43:03,241 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:43:03,241 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895606654] [2019-10-13 21:43:03,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:43:03,248 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:43:03,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:43:03,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:43:03,264 INFO L87 Difference]: Start difference. First operand 785 states. Second operand 3 states. [2019-10-13 21:43:07,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:43:07,455 INFO L93 Difference]: Finished difference Result 2343 states and 4615 transitions. [2019-10-13 21:43:07,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:43:07,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 767 [2019-10-13 21:43:07,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:43:07,499 INFO L225 Difference]: With dead ends: 2343 [2019-10-13 21:43:07,499 INFO L226 Difference]: Without dead ends: 1555 [2019-10-13 21:43:07,509 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 5 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 21:43:07,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2019-10-13 21:43:07,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1555. [2019-10-13 21:43:07,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1555 states. [2019-10-13 21:43:07,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 3003 transitions. [2019-10-13 21:43:07,677 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 3003 transitions. Word has length 767 [2019-10-13 21:43:07,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:43:07,679 INFO L462 AbstractCegarLoop]: Abstraction has 1555 states and 3003 transitions. [2019-10-13 21:43:07,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:43:07,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 3003 transitions. [2019-10-13 21:43:07,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2019-10-13 21:43:07,703 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:43:07,704 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 21:43:07,704 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:43:07,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:43:07,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1537896472, now seen corresponding path program 1 times [2019-10-13 21:43:07,705 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:43:07,706 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689678853] [2019-10-13 21:43:07,706 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:43:07,706 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:43:07,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:43:07,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:43:09,305 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 21:43:09,305 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689678853] [2019-10-13 21:43:09,306 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:43:09,306 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:43:09,306 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049104628] [2019-10-13 21:43:09,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:43:09,309 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:43:09,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:43:09,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:43:09,324 INFO L87 Difference]: Start difference. First operand 1555 states and 3003 transitions. Second operand 4 states. [2019-10-13 21:43:15,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:43:15,784 INFO L93 Difference]: Finished difference Result 6201 states and 12123 transitions. [2019-10-13 21:43:15,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:43:15,784 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 775 [2019-10-13 21:43:15,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:43:15,812 INFO L225 Difference]: With dead ends: 6201 [2019-10-13 21:43:15,812 INFO L226 Difference]: Without dead ends: 4651 [2019-10-13 21:43:15,818 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:43:15,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4651 states. [2019-10-13 21:43:15,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 4651. [2019-10-13 21:43:15,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4651 states. [2019-10-13 21:43:15,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 7921 transitions. [2019-10-13 21:43:15,952 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 7921 transitions. Word has length 775 [2019-10-13 21:43:15,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:43:15,954 INFO L462 AbstractCegarLoop]: Abstraction has 4651 states and 7921 transitions. [2019-10-13 21:43:15,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:43:15,954 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 7921 transitions. [2019-10-13 21:43:15,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 787 [2019-10-13 21:43:15,984 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:43:15,985 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:43:15,985 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:43:15,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:43:15,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1772112930, now seen corresponding path program 1 times [2019-10-13 21:43:15,986 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:43:15,986 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5639448] [2019-10-13 21:43:15,987 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:43:15,987 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:43:15,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:43:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:43:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:43:17,434 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5639448] [2019-10-13 21:43:17,434 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368882866] [2019-10-13 21:43:17,434 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 21:43:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:43:17,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 21:43:17,738 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:43:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:43:18,472 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:43:19,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:43:19,037 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:43:19,038 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-10-13 21:43:19,038 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362247862] [2019-10-13 21:43:19,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:43:19,041 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:43:19,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:43:19,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:43:19,042 INFO L87 Difference]: Start difference. First operand 4651 states and 7921 transitions. Second operand 4 states. [2019-10-13 21:43:25,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:43:25,241 INFO L93 Difference]: Finished difference Result 18585 states and 32570 transitions. [2019-10-13 21:43:25,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:43:25,242 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 786 [2019-10-13 21:43:25,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:43:25,327 INFO L225 Difference]: With dead ends: 18585 [2019-10-13 21:43:25,327 INFO L226 Difference]: Without dead ends: 13939 [2019-10-13 21:43:25,346 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 1582 GetRequests, 1571 SyntacticMatches, 7 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:43:25,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13939 states. [2019-10-13 21:43:25,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13939 to 13939. [2019-10-13 21:43:25,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13939 states. [2019-10-13 21:43:25,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13939 states to 13939 states and 21466 transitions. [2019-10-13 21:43:25,791 INFO L78 Accepts]: Start accepts. Automaton has 13939 states and 21466 transitions. Word has length 786 [2019-10-13 21:43:25,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:43:25,794 INFO L462 AbstractCegarLoop]: Abstraction has 13939 states and 21466 transitions. [2019-10-13 21:43:25,794 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:43:25,795 INFO L276 IsEmpty]: Start isEmpty. Operand 13939 states and 21466 transitions. [2019-10-13 21:43:25,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 982 [2019-10-13 21:43:25,866 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:43:25,867 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 21:43:26,071 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:43:26,072 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:43:26,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:43:26,073 INFO L82 PathProgramCache]: Analyzing trace with hash -588059113, now seen corresponding path program 1 times [2019-10-13 21:43:26,074 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:43:26,074 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441951676] [2019-10-13 21:43:26,075 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:43:26,075 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:43:26,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:43:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:43:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 223 proven. 28 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-10-13 21:43:27,312 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441951676] [2019-10-13 21:43:27,312 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295541878] [2019-10-13 21:43:27,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:43:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:43:27,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 1538 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:43:27,652 INFO L279 TraceCheckSpWp]: Computing forward predicates...