java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:00:19,854 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:00:19,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:00:19,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:00:19,873 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:00:19,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:00:19,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:00:19,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:00:19,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:00:19,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:00:19,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:00:19,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:00:19,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:00:19,900 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:00:19,901 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:00:19,902 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:00:19,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:00:19,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:00:19,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:00:19,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:00:19,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:00:19,910 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:00:19,911 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:00:19,912 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:00:19,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 20:00:19,914 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 20:00:19,915 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 20:00:19,916 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 20:00:19,916 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 20:00:19,917 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 20:00:19,917 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:00:19,918 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:00:19,919 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:00:19,919 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:00:19,921 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:00:19,921 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:00:19,921 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:00:19,922 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:00:19,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:00:19,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:00:19,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:00:19,924 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 20:00:19,947 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:00:19,948 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:00:19,950 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:00:19,950 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:00:19,950 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:00:19,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:00:19,951 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:00:19,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:00:19,951 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:00:19,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:00:19,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:00:19,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:00:19,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:00:19,953 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:00:19,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:00:19,953 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:00:19,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:00:19,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:00:19,954 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:00:19,954 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:00:19,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:00:19,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:00:19,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:00:19,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:00:19,955 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:00:19,956 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:00:19,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:00:19,956 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:00:19,956 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 20:00:20,243 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:00:20,257 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:00:20,261 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:00:20,262 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:00:20,263 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:00:20,264 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label05.c [2019-10-13 20:00:20,339 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e93cdbc77/3ac4f30fc70f4851b02f0f1c52cf6051/FLAG761fba42d [2019-10-13 20:00:21,192 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:00:21,193 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label05.c [2019-10-13 20:00:21,238 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e93cdbc77/3ac4f30fc70f4851b02f0f1c52cf6051/FLAG761fba42d [2019-10-13 20:00:21,665 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e93cdbc77/3ac4f30fc70f4851b02f0f1c52cf6051 [2019-10-13 20:00:21,677 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:00:21,678 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:00:21,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:00:21,680 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:00:21,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:00:21,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:00:21" (1/1) ... [2019-10-13 20:00:21,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54a1030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:21, skipping insertion in model container [2019-10-13 20:00:21,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:00:21" (1/1) ... [2019-10-13 20:00:21,695 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:00:21,843 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:00:23,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:00:23,566 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:00:24,229 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:00:24,264 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:00:24,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:24 WrapperNode [2019-10-13 20:00:24,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:00:24,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:00:24,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:00:24,267 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:00:24,281 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:24" (1/1) ... [2019-10-13 20:00:24,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:24" (1/1) ... [2019-10-13 20:00:24,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:24" (1/1) ... [2019-10-13 20:00:24,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:24" (1/1) ... [2019-10-13 20:00:24,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:24" (1/1) ... [2019-10-13 20:00:24,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:24" (1/1) ... [2019-10-13 20:00:24,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:24" (1/1) ... [2019-10-13 20:00:24,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:00:24,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:00:24,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:00:24,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:00:24,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:24" (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 20:00:24,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:00:24,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:00:24,599 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:00:24,599 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:00:24,599 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 20:00:24,599 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-13 20:00:24,599 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:00:24,600 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:00:24,600 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:00:24,600 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 20:00:24,600 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-13 20:00:24,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:00:24,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:00:24,601 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:00:24,601 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:00:24,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:00:24,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:00:28,963 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:00:28,963 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:00:28,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:00:28 BoogieIcfgContainer [2019-10-13 20:00:28,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:00:28,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:00:28,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:00:28,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:00:28,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:00:21" (1/3) ... [2019-10-13 20:00:28,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718db050 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:00:28, skipping insertion in model container [2019-10-13 20:00:28,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:24" (2/3) ... [2019-10-13 20:00:28,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718db050 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:00:28, skipping insertion in model container [2019-10-13 20:00:28,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:00:28" (3/3) ... [2019-10-13 20:00:28,973 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem04_label05.c [2019-10-13 20:00:28,983 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:00:28,992 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:00:29,003 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:00:29,037 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:00:29,037 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:00:29,037 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:00:29,037 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:00:29,037 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:00:29,038 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:00:29,038 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:00:29,038 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:00:29,072 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states. [2019-10-13 20:00:29,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2019-10-13 20:00:29,113 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:00:29,115 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, 1, 1, 1, 1, 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 20:00:29,117 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:00:29,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:00:29,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1084993238, now seen corresponding path program 1 times [2019-10-13 20:00:29,133 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:00:29,134 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829261489] [2019-10-13 20:00:29,134 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:00:29,134 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:00:29,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:00:29,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:00:31,234 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 20:00:31,235 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829261489] [2019-10-13 20:00:31,236 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:00:31,237 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:00:31,237 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882022405] [2019-10-13 20:00:31,245 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:00:31,247 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:00:31,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:00:31,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:00:31,264 INFO L87 Difference]: Start difference. First operand 906 states. Second operand 3 states. [2019-10-13 20:00:35,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:00:35,739 INFO L93 Difference]: Finished difference Result 2644 states and 5099 transitions. [2019-10-13 20:00:35,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:00:35,743 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 795 [2019-10-13 20:00:35,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:00:35,814 INFO L225 Difference]: With dead ends: 2644 [2019-10-13 20:00:35,815 INFO L226 Difference]: Without dead ends: 1676 [2019-10-13 20:00:35,830 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 20:00:35,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2019-10-13 20:00:35,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1676. [2019-10-13 20:00:36,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1676 states. [2019-10-13 20:00:36,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 3124 transitions. [2019-10-13 20:00:36,017 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 3124 transitions. Word has length 795 [2019-10-13 20:00:36,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:00:36,023 INFO L462 AbstractCegarLoop]: Abstraction has 1676 states and 3124 transitions. [2019-10-13 20:00:36,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:00:36,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 3124 transitions. [2019-10-13 20:00:36,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 804 [2019-10-13 20:00:36,072 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:00:36,073 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:00:36,074 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:00:36,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:00:36,075 INFO L82 PathProgramCache]: Analyzing trace with hash 959317371, now seen corresponding path program 1 times [2019-10-13 20:00:36,075 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:00:36,076 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747775540] [2019-10-13 20:00:36,076 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:00:36,076 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:00:36,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:00:36,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:00:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:00:37,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747775540] [2019-10-13 20:00:37,542 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:00:37,543 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:00:37,543 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596700985] [2019-10-13 20:00:37,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:00:37,548 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:00:37,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:00:37,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:00:37,548 INFO L87 Difference]: Start difference. First operand 1676 states and 3124 transitions. Second operand 4 states. [2019-10-13 20:00:44,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:00:44,415 INFO L93 Difference]: Finished difference Result 6682 states and 12604 transitions. [2019-10-13 20:00:44,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:00:44,416 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 803 [2019-10-13 20:00:44,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:00:44,448 INFO L225 Difference]: With dead ends: 6682 [2019-10-13 20:00:44,448 INFO L226 Difference]: Without dead ends: 5012 [2019-10-13 20:00:44,454 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:00:44,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5012 states. [2019-10-13 20:00:44,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5012 to 5012. [2019-10-13 20:00:44,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5012 states. [2019-10-13 20:00:44,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5012 states to 5012 states and 8180 transitions. [2019-10-13 20:00:44,599 INFO L78 Accepts]: Start accepts. Automaton has 5012 states and 8180 transitions. Word has length 803 [2019-10-13 20:00:44,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:00:44,601 INFO L462 AbstractCegarLoop]: Abstraction has 5012 states and 8180 transitions. [2019-10-13 20:00:44,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:00:44,602 INFO L276 IsEmpty]: Start isEmpty. Operand 5012 states and 8180 transitions. [2019-10-13 20:00:44,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2019-10-13 20:00:44,634 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:00:44,635 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:00:44,636 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:00:44,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:00:44,636 INFO L82 PathProgramCache]: Analyzing trace with hash 888969439, now seen corresponding path program 1 times [2019-10-13 20:00:44,637 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:00:44,637 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180601466] [2019-10-13 20:00:44,637 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:00:44,638 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:00:44,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:00:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:00:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 20:00:46,089 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180601466] [2019-10-13 20:00:46,090 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537054913] [2019-10-13 20:00:46,090 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 20:00:46,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:00:46,372 INFO L256 TraceCheckSpWp]: Trace formula consists of 1145 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 20:00:46,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:00:47,130 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:00:47,131 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:00:48,190 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:00:48,191 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:00:48,192 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-10-13 20:00:48,201 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624183697] [2019-10-13 20:00:48,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:00:48,206 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:00:48,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:00:48,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:00:48,207 INFO L87 Difference]: Start difference. First operand 5012 states and 8180 transitions. Second operand 3 states. [2019-10-13 20:00:53,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:00:53,198 INFO L93 Difference]: Finished difference Result 15022 states and 24920 transitions. [2019-10-13 20:00:53,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:00:53,204 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 821 [2019-10-13 20:00:53,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:00:53,280 INFO L225 Difference]: With dead ends: 15022 [2019-10-13 20:00:53,280 INFO L226 Difference]: Without dead ends: 10016 [2019-10-13 20:00:53,297 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 1652 GetRequests, 1637 SyntacticMatches, 12 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:00:53,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10016 states. [2019-10-13 20:00:53,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10016 to 10016. [2019-10-13 20:00:53,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10016 states. [2019-10-13 20:00:53,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10016 states to 10016 states and 15842 transitions. [2019-10-13 20:00:53,657 INFO L78 Accepts]: Start accepts. Automaton has 10016 states and 15842 transitions. Word has length 821 [2019-10-13 20:00:53,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:00:53,659 INFO L462 AbstractCegarLoop]: Abstraction has 10016 states and 15842 transitions. [2019-10-13 20:00:53,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:00:53,660 INFO L276 IsEmpty]: Start isEmpty. Operand 10016 states and 15842 transitions. [2019-10-13 20:00:53,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2019-10-13 20:00:53,709 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:00:53,710 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:00:53,919 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:00:53,920 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:00:53,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:00:53,921 INFO L82 PathProgramCache]: Analyzing trace with hash 525371407, now seen corresponding path program 1 times [2019-10-13 20:00:53,921 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:00:53,921 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234166186] [2019-10-13 20:00:53,922 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:00:53,922 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:00:53,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:00:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat