/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:41:01,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:41:01,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:41:01,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:41:01,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:41:01,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:41:01,189 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:41:01,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:41:01,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:41:01,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:41:01,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:41:01,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:41:01,196 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:41:01,197 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:41:01,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:41:01,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:41:01,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:41:01,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:41:01,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:41:01,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:41:01,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:41:01,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:41:01,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:41:01,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:41:01,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:41:01,215 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 22:41:01,215 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 22:41:01,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 22:41:01,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 22:41:01,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 22:41:01,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 22:41:01,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 22:41:01,219 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 22:41:01,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:41:01,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:41:01,221 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:41:01,222 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 [2019-11-06 22:41:01,238 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:41:01,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:41:01,241 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:41:01,241 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:41:01,242 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:41:01,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:41:01,242 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:41:01,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:41:01,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:41:01,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:41:01,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:41:01,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:41:01,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:41:01,243 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:41:01,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:41:01,245 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:41:01,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:41:01,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:41:01,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:41:01,246 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:41:01,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:41:01,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:41:01,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:41:01,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:41:01,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:41:01,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:41:01,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:41:01,248 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:41:01,248 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:41:01,532 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:41:01,544 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:41:01,548 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:41:01,549 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:41:01,550 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:41:01,550 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label49.c [2019-11-06 22:41:01,627 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4da15116/24e66ae9140742e4a51c996d22b93754/FLAG1a5107b79 [2019-11-06 22:41:02,429 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:41:02,429 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label49.c [2019-11-06 22:41:02,472 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4da15116/24e66ae9140742e4a51c996d22b93754/FLAG1a5107b79 [2019-11-06 22:41:02,525 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4da15116/24e66ae9140742e4a51c996d22b93754 [2019-11-06 22:41:02,536 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:41:02,538 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:41:02,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:41:02,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:41:02,545 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:41:02,546 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:41:02" (1/1) ... [2019-11-06 22:41:02,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ceec6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:02, skipping insertion in model container [2019-11-06 22:41:02,549 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:41:02" (1/1) ... [2019-11-06 22:41:02,557 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:41:02,732 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:41:04,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:41:04,321 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:41:05,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:41:05,167 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:41:05,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:05 WrapperNode [2019-11-06 22:41:05,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:41:05,169 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:41:05,169 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:41:05,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:41:05,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:05" (1/1) ... [2019-11-06 22:41:05,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:05" (1/1) ... [2019-11-06 22:41:05,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:05" (1/1) ... [2019-11-06 22:41:05,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:05" (1/1) ... [2019-11-06 22:41:05,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:05" (1/1) ... [2019-11-06 22:41:05,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:05" (1/1) ... [2019-11-06 22:41:05,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:05" (1/1) ... [2019-11-06 22:41:05,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:41:05,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:41:05,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:41:05,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:41:05,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:05" (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 [2019-11-06 22:41:05,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:41:05,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:41:05,496 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:41:05,497 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:41:05,497 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 22:41:05,498 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-11-06 22:41:05,499 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:41:05,499 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:41:05,500 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:41:05,501 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 22:41:05,501 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-11-06 22:41:05,501 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:41:05,501 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:41:05,502 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:41:05,503 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:41:05,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:41:05,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:41:10,037 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:41:10,038 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:41:10,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:41:10 BoogieIcfgContainer [2019-11-06 22:41:10,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:41:10,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:41:10,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:41:10,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:41:10,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:41:02" (1/3) ... [2019-11-06 22:41:10,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e036d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:41:10, skipping insertion in model container [2019-11-06 22:41:10,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:05" (2/3) ... [2019-11-06 22:41:10,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e036d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:41:10, skipping insertion in model container [2019-11-06 22:41:10,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:41:10" (3/3) ... [2019-11-06 22:41:10,055 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem04_label49.c [2019-11-06 22:41:10,068 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:41:10,078 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:41:10,089 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:41:10,127 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:41:10,128 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:41:10,128 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:41:10,128 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:41:10,128 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:41:10,128 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:41:10,128 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:41:10,129 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:41:10,169 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states. [2019-11-06 22:41:10,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 804 [2019-11-06 22:41:10,222 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:41:10,224 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:41:10,225 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:41:10,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:41:10,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1186734646, now seen corresponding path program 1 times [2019-11-06 22:41:10,241 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:41:10,241 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129005789] [2019-11-06 22:41:10,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:41:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:41:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:41:12,203 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129005789] [2019-11-06 22:41:12,203 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:41:12,204 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:41:12,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59182173] [2019-11-06 22:41:12,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:41:12,213 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:41:12,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:41:12,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:41:12,230 INFO L87 Difference]: Start difference. First operand 906 states. Second operand 3 states. [2019-11-06 22:41:16,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:41:16,975 INFO L93 Difference]: Finished difference Result 2644 states and 5099 transitions. [2019-11-06 22:41:16,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:41:16,977 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 803 [2019-11-06 22:41:16,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:41:17,030 INFO L225 Difference]: With dead ends: 2644 [2019-11-06 22:41:17,030 INFO L226 Difference]: Without dead ends: 1676 [2019-11-06 22:41:17,049 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 6 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:41:17,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2019-11-06 22:41:17,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1676. [2019-11-06 22:41:17,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1676 states. [2019-11-06 22:41:17,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 3016 transitions. [2019-11-06 22:41:17,253 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 3016 transitions. Word has length 803 [2019-11-06 22:41:17,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:41:17,258 INFO L462 AbstractCegarLoop]: Abstraction has 1676 states and 3016 transitions. [2019-11-06 22:41:17,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:41:17,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 3016 transitions. [2019-11-06 22:41:17,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 812 [2019-11-06 22:41:17,289 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:41:17,290 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:41:17,290 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:41:17,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:41:17,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1372631323, now seen corresponding path program 1 times [2019-11-06 22:41:17,291 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:41:17,292 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38751150] [2019-11-06 22:41:17,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:41:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:41:18,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:41:18,797 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38751150] [2019-11-06 22:41:18,797 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:41:18,798 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:41:18,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627269368] [2019-11-06 22:41:18,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:41:18,801 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:41:18,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:41:18,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:41:18,802 INFO L87 Difference]: Start difference. First operand 1676 states and 3016 transitions. Second operand 4 states. [2019-11-06 22:41:25,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:41:25,999 INFO L93 Difference]: Finished difference Result 6682 states and 12172 transitions. [2019-11-06 22:41:25,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:41:26,000 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 811 [2019-11-06 22:41:26,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:41:26,029 INFO L225 Difference]: With dead ends: 6682 [2019-11-06 22:41:26,030 INFO L226 Difference]: Without dead ends: 5012 [2019-11-06 22:41:26,036 INFO L630 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 [2019-11-06 22:41:26,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5012 states. [2019-11-06 22:41:26,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5012 to 5012. [2019-11-06 22:41:26,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5012 states. [2019-11-06 22:41:26,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5012 states to 5012 states and 8588 transitions. [2019-11-06 22:41:26,200 INFO L78 Accepts]: Start accepts. Automaton has 5012 states and 8588 transitions. Word has length 811 [2019-11-06 22:41:26,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:41:26,202 INFO L462 AbstractCegarLoop]: Abstraction has 5012 states and 8588 transitions. [2019-11-06 22:41:26,203 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:41:26,203 INFO L276 IsEmpty]: Start isEmpty. Operand 5012 states and 8588 transitions. [2019-11-06 22:41:26,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 862 [2019-11-06 22:41:26,226 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:41:26,227 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:41:26,227 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:41:26,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:41:26,229 INFO L82 PathProgramCache]: Analyzing trace with hash -126749505, now seen corresponding path program 1 times [2019-11-06 22:41:26,229 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:41:26,230 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852033811] [2019-11-06 22:41:26,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:41:26,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:41:27,137 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:41:27,137 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852033811] [2019-11-06 22:41:27,138 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:41:27,138 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:41:27,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935307038] [2019-11-06 22:41:27,140 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:41:27,140 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:41:27,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:41:27,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:41:27,141 INFO L87 Difference]: Start difference. First operand 5012 states and 8588 transitions. Second operand 6 states. [2019-11-06 22:41:33,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:41:33,298 INFO L93 Difference]: Finished difference Result 15280 states and 26898 transitions. [2019-11-06 22:41:33,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:41:33,302 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 861 [2019-11-06 22:41:33,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:41:33,360 INFO L225 Difference]: With dead ends: 15280 [2019-11-06 22:41:33,360 INFO L226 Difference]: Without dead ends: 10274 [2019-11-06 22:41:33,373 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:41:33,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10274 states. [2019-11-06 22:41:33,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10274 to 10208. [2019-11-06 22:41:33,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10208 states. [2019-11-06 22:41:33,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10208 states to 10208 states and 16957 transitions. [2019-11-06 22:41:33,722 INFO L78 Accepts]: Start accepts. Automaton has 10208 states and 16957 transitions. Word has length 861 [2019-11-06 22:41:33,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:41:33,723 INFO L462 AbstractCegarLoop]: Abstraction has 10208 states and 16957 transitions. [2019-11-06 22:41:33,723 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:41:33,724 INFO L276 IsEmpty]: Start isEmpty. Operand 10208 states and 16957 transitions. [2019-11-06 22:41:33,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 870 [2019-11-06 22:41:33,768 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:41:33,769 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:41:33,769 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:41:33,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:41:33,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1421422384, now seen corresponding path program 1 times [2019-11-06 22:41:33,770 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:41:33,770 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658732602] [2019-11-06 22:41:33,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:41:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:41:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 66 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:41:34,484 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658732602] [2019-11-06 22:41:34,484 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800482476] [2019-11-06 22:41:34,485 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 [2019-11-06 22:41:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:41:34,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 1250 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:41:34,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:41:35,314 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 66 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:41:35,314 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:41:36,044 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 66 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:41:36,044 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1823315028] [2019-11-06 22:41:36,053 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 870 [2019-11-06 22:41:36,161 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:41:36,162 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)