/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_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:39:43,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:39:43,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:39:43,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:39:43,710 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:39:43,712 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:39:43,714 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:39:43,726 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:39:43,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:39:43,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:39:43,732 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:39:43,735 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:39:43,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:39:43,738 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:39:43,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:39:43,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:39:43,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:39:43,745 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:39:43,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:39:43,750 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:39:43,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:39:43,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:39:43,753 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:39:43,754 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:39:43,756 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 22:39:43,756 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 22:39:43,756 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 22:39:43,757 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 22:39:43,758 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 22:39:43,758 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 22:39:43,759 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 22:39:43,759 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 22:39:43,760 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 22:39:43,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 22:39:43,762 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 22:39:43,762 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 22:39:43,763 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 22:39:43,763 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 22:39:43,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:39:43,764 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:39:43,764 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:39:43,765 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 22:39:43,779 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:39:43,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:39:43,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:39:43,780 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:39:43,781 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:39:43,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:39:43,781 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:39:43,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:39:43,781 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:39:43,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:39:43,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:39:43,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:39:43,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:39:43,782 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:39:43,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:39:43,783 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:39:43,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:39:43,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:39:43,783 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:39:43,784 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:39:43,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:39:43,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:39:43,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:39:43,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:39:43,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:39:43,785 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:39:43,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:39:43,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:39:43,785 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 22:39:44,050 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:39:44,062 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:39:44,066 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:39:44,067 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:39:44,067 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:39:44,068 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label21.c [2019-11-06 22:39:44,133 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f30ec930e/6a0a91e49d334b3cb4f519ce97e9a629/FLAG62ce489be [2019-11-06 22:39:44,910 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:39:44,912 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label21.c [2019-11-06 22:39:44,944 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f30ec930e/6a0a91e49d334b3cb4f519ce97e9a629/FLAG62ce489be [2019-11-06 22:39:44,972 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f30ec930e/6a0a91e49d334b3cb4f519ce97e9a629 [2019-11-06 22:39:44,983 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:39:44,985 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:39:44,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:39:44,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:39:44,990 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:39:44,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:39:44" (1/1) ... [2019-11-06 22:39:44,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6051b70c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:44, skipping insertion in model container [2019-11-06 22:39:44,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:39:44" (1/1) ... [2019-11-06 22:39:45,005 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:39:45,176 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:39:46,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:39:46,824 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:39:47,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:39:47,445 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:39:47,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:47 WrapperNode [2019-11-06 22:39:47,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:39:47,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:39:47,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:39:47,448 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:39:47,462 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:47" (1/1) ... [2019-11-06 22:39:47,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:47" (1/1) ... [2019-11-06 22:39:47,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:47" (1/1) ... [2019-11-06 22:39:47,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:47" (1/1) ... [2019-11-06 22:39:47,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:47" (1/1) ... [2019-11-06 22:39:47,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:47" (1/1) ... [2019-11-06 22:39:47,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:47" (1/1) ... [2019-11-06 22:39:47,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:39:47,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:39:47,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:39:47,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:39:47,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:47" (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 22:39:47,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:39:47,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:39:47,787 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:39:47,788 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:39:47,788 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 22:39:47,788 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-11-06 22:39:47,788 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:39:47,789 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:39:47,789 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:39:47,790 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 22:39:47,791 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-11-06 22:39:47,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:39:47,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:39:47,793 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:39:47,793 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:39:47,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:39:47,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:39:52,291 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:39:52,292 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:39:52,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:39:52 BoogieIcfgContainer [2019-11-06 22:39:52,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:39:52,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:39:52,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:39:52,298 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:39:52,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:39:44" (1/3) ... [2019-11-06 22:39:52,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42eedbfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:39:52, skipping insertion in model container [2019-11-06 22:39:52,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:47" (2/3) ... [2019-11-06 22:39:52,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42eedbfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:39:52, skipping insertion in model container [2019-11-06 22:39:52,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:39:52" (3/3) ... [2019-11-06 22:39:52,301 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem04_label21.c [2019-11-06 22:39:52,311 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:39:52,320 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:39:52,331 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:39:52,370 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:39:52,370 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:39:52,370 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:39:52,370 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:39:52,371 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:39:52,371 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:39:52,371 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:39:52,371 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:39:52,415 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states. [2019-11-06 22:39:52,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 809 [2019-11-06 22:39:52,472 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:39:52,475 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, 1, 1, 1, 1, 1] [2019-11-06 22:39:52,477 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:39:52,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:39:52,484 INFO L82 PathProgramCache]: Analyzing trace with hash 449962387, now seen corresponding path program 1 times [2019-11-06 22:39:52,494 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:39:52,494 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207954131] [2019-11-06 22:39:52,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:39:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:39:54,754 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 22:39:54,755 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207954131] [2019-11-06 22:39:54,756 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:39:54,756 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:39:54,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666597500] [2019-11-06 22:39:54,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:39:54,767 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:39:54,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:39:54,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:39:54,787 INFO L87 Difference]: Start difference. First operand 906 states. Second operand 4 states. [2019-11-06 22:40:03,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:40:03,410 INFO L93 Difference]: Finished difference Result 3482 states and 6770 transitions. [2019-11-06 22:40:03,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:40:03,414 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 808 [2019-11-06 22:40:03,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:40:03,464 INFO L225 Difference]: With dead ends: 3482 [2019-11-06 22:40:03,464 INFO L226 Difference]: Without dead ends: 2510 [2019-11-06 22:40:03,476 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 5 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 22:40:03,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2019-11-06 22:40:03,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 2510. [2019-11-06 22:40:03,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2510 states. [2019-11-06 22:40:03,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2510 states to 2510 states and 4676 transitions. [2019-11-06 22:40:03,679 INFO L78 Accepts]: Start accepts. Automaton has 2510 states and 4676 transitions. Word has length 808 [2019-11-06 22:40:03,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:40:03,682 INFO L462 AbstractCegarLoop]: Abstraction has 2510 states and 4676 transitions. [2019-11-06 22:40:03,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:40:03,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2510 states and 4676 transitions. [2019-11-06 22:40:03,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 882 [2019-11-06 22:40:03,720 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:40:03,721 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, 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] [2019-11-06 22:40:03,721 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:40:03,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:40:03,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1581672456, now seen corresponding path program 1 times [2019-11-06 22:40:03,723 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:40:03,723 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160145664] [2019-11-06 22:40:03,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:40:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:40:04,631 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:40:04,632 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160145664] [2019-11-06 22:40:04,632 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:40:04,632 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:40:04,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599021217] [2019-11-06 22:40:04,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:40:04,642 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:40:04,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:40:04,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:40:04,643 INFO L87 Difference]: Start difference. First operand 2510 states and 4676 transitions. Second operand 6 states. [2019-11-06 22:40:10,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:40:10,750 INFO L93 Difference]: Finished difference Result 5945 states and 11072 transitions. [2019-11-06 22:40:10,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:40:10,755 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 881 [2019-11-06 22:40:10,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:40:10,779 INFO L225 Difference]: With dead ends: 5945 [2019-11-06 22:40:10,780 INFO L226 Difference]: Without dead ends: 3441 [2019-11-06 22:40:10,787 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:40:10,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2019-11-06 22:40:10,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 3395. [2019-11-06 22:40:10,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3395 states. [2019-11-06 22:40:10,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3395 states to 3395 states and 5729 transitions. [2019-11-06 22:40:10,912 INFO L78 Accepts]: Start accepts. Automaton has 3395 states and 5729 transitions. Word has length 881 [2019-11-06 22:40:10,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:40:10,913 INFO L462 AbstractCegarLoop]: Abstraction has 3395 states and 5729 transitions. [2019-11-06 22:40:10,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:40:10,913 INFO L276 IsEmpty]: Start isEmpty. Operand 3395 states and 5729 transitions. [2019-11-06 22:40:10,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 901 [2019-11-06 22:40:10,932 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:40:10,933 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:40:10,934 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:40:10,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:40:10,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1049292807, now seen corresponding path program 1 times [2019-11-06 22:40:10,936 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:40:10,936 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805038008] [2019-11-06 22:40:10,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:40:11,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:40:11,638 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 87 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:40:11,638 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805038008] [2019-11-06 22:40:11,638 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867891198] [2019-11-06 22:40:11,639 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 22:40:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:40:12,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 1279 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:40:12,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:40:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:40:12,624 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:40:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:40:13,168 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [39669680] [2019-11-06 22:40:13,174 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 901 [2019-11-06 22:40:13,264 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:40:13,265 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)