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_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:42:12,508 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:42:12,510 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:42:12,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:42:12,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:42:12,525 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:42:12,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:42:12,528 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:42:12,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:42:12,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:42:12,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:42:12,533 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:42:12,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:42:12,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:42:12,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:42:12,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:42:12,537 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:42:12,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:42:12,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:42:12,542 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:42:12,544 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:42:12,545 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:42:12,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:42:12,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:42:12,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:42:12,549 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:42:12,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:42:12,550 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:42:12,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:42:12,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:42:12,552 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:42:12,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:42:12,556 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:42:12,557 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:42:12,559 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:42:12,559 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:42:12,560 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:42:12,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:42:12,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:42:12,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:42:12,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:42:12,565 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:42:12,588 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:42:12,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:42:12,591 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:42:12,591 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:42:12,591 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:42:12,592 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:42:12,592 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:42:12,592 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:42:12,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:42:12,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:42:12,593 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:42:12,594 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:42:12,594 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:42:12,594 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:42:12,595 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:42:12,595 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:42:12,595 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:42:12,595 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:42:12,595 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:42:12,596 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:42:12,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:42:12,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:42:12,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:42:12,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:42:12,597 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:42:12,597 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:42:12,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:42:12,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:42:12,598 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-13 21:42:12,947 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:42:12,970 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:42:12,973 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:42:12,975 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:42:12,975 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:42:12,976 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label20.c [2019-10-13 21:42:13,066 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e549a52a/c1e18e26212849fca76326a28999efce/FLAGa42027c39 [2019-10-13 21:42:13,820 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:42:13,821 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label20.c [2019-10-13 21:42:13,864 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e549a52a/c1e18e26212849fca76326a28999efce/FLAGa42027c39 [2019-10-13 21:42:14,346 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e549a52a/c1e18e26212849fca76326a28999efce [2019-10-13 21:42:14,357 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:42:14,358 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:42:14,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:42:14,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:42:14,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:42:14,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:42:14" (1/1) ... [2019-10-13 21:42:14,369 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ce32cb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:14, skipping insertion in model container [2019-10-13 21:42:14,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:42:14" (1/1) ... [2019-10-13 21:42:14,377 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:42:14,532 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:42:16,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:42:16,239 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:42:16,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:42:16,840 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:42:16,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:16 WrapperNode [2019-10-13 21:42:16,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:42:16,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:42:16,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:42:16,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:42:16,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:16" (1/1) ... [2019-10-13 21:42:16,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:16" (1/1) ... [2019-10-13 21:42:16,912 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:16" (1/1) ... [2019-10-13 21:42:16,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:16" (1/1) ... [2019-10-13 21:42:17,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:16" (1/1) ... [2019-10-13 21:42:17,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:16" (1/1) ... [2019-10-13 21:42:17,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:16" (1/1) ... [2019-10-13 21:42:17,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:42:17,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:42:17,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:42:17,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:42:17,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:42:17,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:42:17,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:42:17,223 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 21:42:17,223 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 21:42:17,223 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 21:42:17,224 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-13 21:42:17,225 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:42:17,226 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 21:42:17,226 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 21:42:17,226 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 21:42:17,226 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-13 21:42:17,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:42:17,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:42:17,228 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:42:17,228 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:42:17,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:42:17,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:42:22,530 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:42:22,531 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 21:42:22,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:42:22 BoogieIcfgContainer [2019-10-13 21:42:22,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:42:22,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:42:22,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:42:22,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:42:22,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:42:14" (1/3) ... [2019-10-13 21:42:22,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea7287c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:42:22, skipping insertion in model container [2019-10-13 21:42:22,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:16" (2/3) ... [2019-10-13 21:42:22,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea7287c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:42:22, skipping insertion in model container [2019-10-13 21:42:22,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:42:22" (3/3) ... [2019-10-13 21:42:22,541 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem04_label20.c [2019-10-13 21:42:22,552 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:42:22,561 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:42:22,572 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:42:22,604 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:42:22,604 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:42:22,604 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:42:22,605 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:42:22,605 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:42:22,605 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:42:22,605 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:42:22,605 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:42:22,638 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states. [2019-10-13 21:42:22,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 768 [2019-10-13 21:42:22,688 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:42:22,690 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:42:22,693 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:42:22,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:42:22,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1899131751, now seen corresponding path program 1 times [2019-10-13 21:42:22,710 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:42:22,710 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943916859] [2019-10-13 21:42:22,711 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:42:22,711 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:42:22,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:42:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:42:24,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:42:24,715 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943916859] [2019-10-13 21:42:24,716 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:42:24,717 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:42:24,717 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629230939] [2019-10-13 21:42:24,724 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:42:24,725 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:42:24,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:42:24,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:42:24,739 INFO L87 Difference]: Start difference. First operand 785 states. Second operand 3 states. [2019-10-13 21:42:29,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:42:29,530 INFO L93 Difference]: Finished difference Result 2343 states and 4615 transitions. [2019-10-13 21:42:29,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:42:29,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 767 [2019-10-13 21:42:29,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:42:29,570 INFO L225 Difference]: With dead ends: 2343 [2019-10-13 21:42:29,570 INFO L226 Difference]: Without dead ends: 1555 [2019-10-13 21:42:29,579 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 5 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:42:29,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2019-10-13 21:42:29,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1555. [2019-10-13 21:42:29,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1555 states. [2019-10-13 21:42:29,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2835 transitions. [2019-10-13 21:42:29,727 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 2835 transitions. Word has length 767 [2019-10-13 21:42:29,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:42:29,730 INFO L462 AbstractCegarLoop]: Abstraction has 1555 states and 2835 transitions. [2019-10-13 21:42:29,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:42:29,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 2835 transitions. [2019-10-13 21:42:29,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 826 [2019-10-13 21:42:29,761 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:42:29,762 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:42:29,762 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:42:29,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:42:29,764 INFO L82 PathProgramCache]: Analyzing trace with hash 793926212, now seen corresponding path program 1 times [2019-10-13 21:42:29,764 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:42:29,764 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679130394] [2019-10-13 21:42:29,765 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:42:29,765 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:42:29,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:42:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:42:30,994 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:42:30,996 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679130394] [2019-10-13 21:42:30,996 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:42:30,997 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:42:30,997 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171478153] [2019-10-13 21:42:31,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:42:31,002 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:42:31,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:42:31,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:42:31,003 INFO L87 Difference]: Start difference. First operand 1555 states and 2835 transitions. Second operand 6 states. [2019-10-13 21:42:36,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:42:36,486 INFO L93 Difference]: Finished difference Result 4743 states and 8684 transitions. [2019-10-13 21:42:36,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:42:36,489 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 825 [2019-10-13 21:42:36,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:42:36,508 INFO L225 Difference]: With dead ends: 4743 [2019-10-13 21:42:36,509 INFO L226 Difference]: Without dead ends: 3193 [2019-10-13 21:42:36,513 INFO L600 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 [2019-10-13 21:42:36,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3193 states. [2019-10-13 21:42:36,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3193 to 3163. [2019-10-13 21:42:36,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3163 states. [2019-10-13 21:42:36,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 5449 transitions. [2019-10-13 21:42:36,607 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 5449 transitions. Word has length 825 [2019-10-13 21:42:36,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:42:36,607 INFO L462 AbstractCegarLoop]: Abstraction has 3163 states and 5449 transitions. [2019-10-13 21:42:36,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:42:36,608 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 5449 transitions. [2019-10-13 21:42:36,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2019-10-13 21:42:36,627 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:42:36,627 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 21:42:36,628 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:42:36,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:42:36,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1615284124, now seen corresponding path program 1 times [2019-10-13 21:42:36,629 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:42:36,629 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058961095] [2019-10-13 21:42:36,630 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:42:36,630 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:42:36,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:42:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:42:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:42:37,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058961095] [2019-10-13 21:42:37,605 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:42:37,605 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:42:37,605 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200585485] [2019-10-13 21:42:37,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:42:37,607 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:42:37,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:42:37,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:42:37,608 INFO L87 Difference]: Start difference. First operand 3163 states and 5449 transitions. Second operand 6 states. [2019-10-13 21:42:43,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:42:43,413 INFO L93 Difference]: Finished difference Result 8016 states and 13805 transitions. [2019-10-13 21:42:43,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:42:43,415 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 845 [2019-10-13 21:42:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:42:43,442 INFO L225 Difference]: With dead ends: 8016 [2019-10-13 21:42:43,443 INFO L226 Difference]: Without dead ends: 4858 [2019-10-13 21:42:43,451 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:42:43,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4858 states. [2019-10-13 21:42:43,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4858 to 4828. [2019-10-13 21:42:43,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4828 states. [2019-10-13 21:42:43,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4828 states to 4828 states and 7586 transitions. [2019-10-13 21:42:43,605 INFO L78 Accepts]: Start accepts. Automaton has 4828 states and 7586 transitions. Word has length 845 [2019-10-13 21:42:43,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:42:43,605 INFO L462 AbstractCegarLoop]: Abstraction has 4828 states and 7586 transitions. [2019-10-13 21:42:43,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:42:43,606 INFO L276 IsEmpty]: Start isEmpty. Operand 4828 states and 7586 transitions. [2019-10-13 21:42:43,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 865 [2019-10-13 21:42:43,629 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:42:43,630 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 21:42:43,630 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:42:43,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:42:43,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1400745183, now seen corresponding path program 1 times [2019-10-13 21:42:43,631 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:42:43,631 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603290620] [2019-10-13 21:42:43,632 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:42:43,632 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:42:43,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:42:43,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:42:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 108 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:42:44,429 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603290620] [2019-10-13 21:42:44,431 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852565385] [2019-10-13 21:42:44,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:42:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:42:44,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:42:44,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:42:45,589 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 108 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:42:45,589 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:42:46,677 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 108 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:42:46,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1820106984] [2019-10-13 21:42:46,739 INFO L162 IcfgInterpreter]: Started Sifa with 771 locations of interest [2019-10-13 21:42:46,740 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:42:46,752 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:42:46,765 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:42:46,766 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:42:47,108 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 99 for LOIs