/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 --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_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:44:17,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:44:17,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:44:17,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:44:17,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:44:17,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:44:17,767 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:44:17,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:44:17,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:44:17,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:44:17,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:44:17,787 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:44:17,788 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:44:17,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:44:17,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:44:17,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:44:17,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:44:17,800 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:44:17,802 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:44:17,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:44:17,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:44:17,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:44:17,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:44:17,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:44:17,821 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 01:44:17,821 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 01:44:17,821 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 01:44:17,823 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 01:44:17,824 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 01:44:17,827 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 01:44:17,827 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 01:44:17,828 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 01:44:17,828 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 01:44:17,829 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 01:44:17,830 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 01:44:17,830 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 01:44:17,831 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 01:44:17,831 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 01:44:17,831 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:44:17,832 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:44:17,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:44:17,834 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 [2019-11-07 01:44:17,852 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:44:17,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:44:17,854 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:44:17,854 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:44:17,854 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:44:17,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:44:17,854 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:44:17,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:44:17,855 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:44:17,855 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:44:17,856 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:44:17,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:44:17,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:44:17,857 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:44:17,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:44:17,858 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:44:17,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:44:17,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:44:17,858 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:44:17,859 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:44:17,859 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:44:17,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:44:17,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:44:17,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:44:17,860 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:44:17,860 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:44:17,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:44:17,860 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:44:17,861 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 [2019-11-07 01:44:18,120 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:44:18,133 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:44:18,136 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:44:18,138 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:44:18,138 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:44:18,139 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label42.c [2019-11-07 01:44:18,197 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55ba2365b/05c65744d1be49d1ab7a50e9900fc3f5/FLAG996b08fdd [2019-11-07 01:44:18,951 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:44:18,951 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label42.c [2019-11-07 01:44:18,981 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55ba2365b/05c65744d1be49d1ab7a50e9900fc3f5/FLAG996b08fdd [2019-11-07 01:44:19,028 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55ba2365b/05c65744d1be49d1ab7a50e9900fc3f5 [2019-11-07 01:44:19,040 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:44:19,042 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:44:19,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:44:19,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:44:19,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:44:19,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:19" (1/1) ... [2019-11-07 01:44:19,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2406b1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:19, skipping insertion in model container [2019-11-07 01:44:19,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:19" (1/1) ... [2019-11-07 01:44:19,061 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:44:19,219 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:44:20,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:44:20,674 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:44:21,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:44:21,532 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:44:21,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:21 WrapperNode [2019-11-07 01:44:21,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:44:21,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:44:21,534 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:44:21,534 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:44:21,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:21" (1/1) ... [2019-11-07 01:44:21,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:21" (1/1) ... [2019-11-07 01:44:21,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:21" (1/1) ... [2019-11-07 01:44:21,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:21" (1/1) ... [2019-11-07 01:44:21,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:21" (1/1) ... [2019-11-07 01:44:21,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:21" (1/1) ... [2019-11-07 01:44:21,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:21" (1/1) ... [2019-11-07 01:44:21,854 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:44:21,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:44:21,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:44:21,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:44:21,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:21" (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 [2019-11-07 01:44:21,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:44:21,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:44:21,930 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:44:21,930 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-07 01:44:21,931 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-07 01:44:21,931 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-11-07 01:44:21,931 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:44:21,931 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:44:21,931 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-07 01:44:21,932 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-07 01:44:21,932 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-11-07 01:44:21,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:44:21,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:44:21,932 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:44:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:44:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:44:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:44:27,100 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:44:27,100 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:44:27,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:44:27 BoogieIcfgContainer [2019-11-07 01:44:27,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:44:27,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:44:27,103 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:44:27,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:44:27,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:44:19" (1/3) ... [2019-11-07 01:44:27,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@176a02a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:44:27, skipping insertion in model container [2019-11-07 01:44:27,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:21" (2/3) ... [2019-11-07 01:44:27,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@176a02a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:44:27, skipping insertion in model container [2019-11-07 01:44:27,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:44:27" (3/3) ... [2019-11-07 01:44:27,110 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem04_label42.c [2019-11-07 01:44:27,119 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:44:27,127 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:44:27,138 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:44:27,169 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:44:27,169 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:44:27,169 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:44:27,169 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:44:27,169 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:44:27,169 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:44:27,170 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:44:27,170 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:44:27,200 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states. [2019-11-07 01:44:27,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 768 [2019-11-07 01:44:27,237 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:44:27,239 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] [2019-11-07 01:44:27,242 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:44:27,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:44:27,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1899126375, now seen corresponding path program 1 times [2019-11-07 01:44:27,259 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:44:27,260 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322369898] [2019-11-07 01:44:27,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:44:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:44:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:44:29,666 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322369898] [2019-11-07 01:44:29,667 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:44:29,667 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:44:29,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592288188] [2019-11-07 01:44:29,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:44:29,675 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:44:29,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:44:29,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:44:29,689 INFO L87 Difference]: Start difference. First operand 785 states. Second operand 3 states. [2019-11-07 01:44:34,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:44:34,729 INFO L93 Difference]: Finished difference Result 2343 states and 4615 transitions. [2019-11-07 01:44:34,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:44:34,731 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 767 [2019-11-07 01:44:34,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:44:34,824 INFO L225 Difference]: With dead ends: 2343 [2019-11-07 01:44:34,824 INFO L226 Difference]: Without dead ends: 1555 [2019-11-07 01:44:34,848 INFO L630 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 [2019-11-07 01:44:34,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2019-11-07 01:44:35,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1555. [2019-11-07 01:44:35,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1555 states. [2019-11-07 01:44:35,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2847 transitions. [2019-11-07 01:44:35,055 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 2847 transitions. Word has length 767 [2019-11-07 01:44:35,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:44:35,060 INFO L462 AbstractCegarLoop]: Abstraction has 1555 states and 2847 transitions. [2019-11-07 01:44:35,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:44:35,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 2847 transitions. [2019-11-07 01:44:35,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2019-11-07 01:44:35,104 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:44:35,106 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:44:35,106 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:44:35,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:44:35,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1340668006, now seen corresponding path program 1 times [2019-11-07 01:44:35,107 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:44:35,108 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609536306] [2019-11-07 01:44:35,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:44:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:44:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:44:35,847 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609536306] [2019-11-07 01:44:35,847 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:44:35,847 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:44:35,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288388184] [2019-11-07 01:44:35,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:44:35,850 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:44:35,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:44:35,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:44:35,851 INFO L87 Difference]: Start difference. First operand 1555 states and 2847 transitions. Second operand 6 states. [2019-11-07 01:44:42,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:44:42,317 INFO L93 Difference]: Finished difference Result 4764 states and 8788 transitions. [2019-11-07 01:44:42,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 01:44:42,318 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 782 [2019-11-07 01:44:42,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:44:42,342 INFO L225 Difference]: With dead ends: 4764 [2019-11-07 01:44:42,343 INFO L226 Difference]: Without dead ends: 3214 [2019-11-07 01:44:42,350 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 [2019-11-07 01:44:42,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2019-11-07 01:44:42,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 3154. [2019-11-07 01:44:42,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3154 states. [2019-11-07 01:44:42,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3154 states to 3154 states and 5656 transitions. [2019-11-07 01:44:42,507 INFO L78 Accepts]: Start accepts. Automaton has 3154 states and 5656 transitions. Word has length 782 [2019-11-07 01:44:42,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:44:42,508 INFO L462 AbstractCegarLoop]: Abstraction has 3154 states and 5656 transitions. [2019-11-07 01:44:42,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:44:42,508 INFO L276 IsEmpty]: Start isEmpty. Operand 3154 states and 5656 transitions. [2019-11-07 01:44:42,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2019-11-07 01:44:42,537 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:44:42,538 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:44:42,538 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:44:42,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:44:42,539 INFO L82 PathProgramCache]: Analyzing trace with hash 949893952, now seen corresponding path program 1 times [2019-11-07 01:44:42,539 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:44:42,540 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377389317] [2019-11-07 01:44:42,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:44:42,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:44:43,325 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:44:43,325 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377389317] [2019-11-07 01:44:43,326 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:44:43,326 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:44:43,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175013379] [2019-11-07 01:44:43,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:44:43,328 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:44:43,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:44:43,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:44:43,329 INFO L87 Difference]: Start difference. First operand 3154 states and 5656 transitions. Second operand 6 states. [2019-11-07 01:44:48,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:44:48,856 INFO L93 Difference]: Finished difference Result 8033 states and 14305 transitions. [2019-11-07 01:44:48,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 01:44:48,861 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 795 [2019-11-07 01:44:48,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:44:48,888 INFO L225 Difference]: With dead ends: 8033 [2019-11-07 01:44:48,888 INFO L226 Difference]: Without dead ends: 4884 [2019-11-07 01:44:48,896 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 [2019-11-07 01:44:48,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4884 states. [2019-11-07 01:44:49,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4884 to 4855. [2019-11-07 01:44:49,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4855 states. [2019-11-07 01:44:49,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4855 states to 4855 states and 7630 transitions. [2019-11-07 01:44:49,057 INFO L78 Accepts]: Start accepts. Automaton has 4855 states and 7630 transitions. Word has length 795 [2019-11-07 01:44:49,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:44:49,058 INFO L462 AbstractCegarLoop]: Abstraction has 4855 states and 7630 transitions. [2019-11-07 01:44:49,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:44:49,058 INFO L276 IsEmpty]: Start isEmpty. Operand 4855 states and 7630 transitions. [2019-11-07 01:44:49,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2019-11-07 01:44:49,095 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:44:49,096 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-07 01:44:49,096 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:44:49,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:44:49,097 INFO L82 PathProgramCache]: Analyzing trace with hash -599411327, now seen corresponding path program 1 times [2019-11-07 01:44:49,098 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:44:49,098 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720096865] [2019-11-07 01:44:49,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:44:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:44:49,639 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:44:49,640 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720096865] [2019-11-07 01:44:49,640 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704653143] [2019-11-07 01:44:49,640 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 [2019-11-07 01:44:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:44:49,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 1243 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 01:44:50,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:44:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:44:50,450 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:44:51,011 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:44:51,012 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2031932432] [2019-11-07 01:44:51,090 INFO L159 IcfgInterpreter]: Started Sifa with 771 locations of interest [2019-11-07 01:44:51,090 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:44:51,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:44:51,105 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:44:51,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:44:51,281 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 99 for LOIs [2019-11-07 01:44:53,071 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 167 [2019-11-07 01:44:53,501 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 100 for LOIs