/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:41:06,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:41:06,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:41:06,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:41:06,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:41:06,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:41:06,137 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:41:06,147 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:41:06,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:41:06,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:41:06,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:41:06,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:41:06,157 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:41:06,159 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:41:06,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:41:06,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:41:06,165 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:41:06,167 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:41:06,168 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:41:06,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:41:06,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:41:06,180 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:41:06,183 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:41:06,184 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:41:06,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 22:41:06,186 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 22:41:06,186 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 22:41:06,188 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 22:41:06,188 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 22:41:06,190 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 22:41:06,190 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 22:41:06,191 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 22:41:06,192 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 22:41:06,193 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 22:41:06,194 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 22:41:06,195 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 22:41:06,195 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 22:41:06,195 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 22:41:06,196 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:41:06,197 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:41:06,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:41:06,198 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 22:41:06,230 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:41:06,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:41:06,231 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:41:06,231 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:41:06,235 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:41:06,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:41:06,235 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:41:06,235 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:41:06,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:41:06,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:41:06,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:41:06,236 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:41:06,236 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:41:06,237 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:41:06,238 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:41:06,238 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:41:06,238 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:41:06,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:41:06,239 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:41:06,239 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:41:06,239 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:41:06,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:41:06,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:41:06,240 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:41:06,240 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:41:06,240 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:41:06,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:41:06,240 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:41:06,241 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:41:06,561 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:41:06,583 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:41:06,586 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:41:06,588 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:41:06,588 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:41:06,589 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label50.c [2019-11-06 22:41:06,655 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e1786795/fe5e0e24c2a840da8d7eb0e42a119504/FLAG207f65b1a [2019-11-06 22:41:07,379 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:41:07,379 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label50.c [2019-11-06 22:41:07,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e1786795/fe5e0e24c2a840da8d7eb0e42a119504/FLAG207f65b1a [2019-11-06 22:41:07,488 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e1786795/fe5e0e24c2a840da8d7eb0e42a119504 [2019-11-06 22:41:07,499 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:41:07,501 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:41:07,506 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:41:07,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:41:07,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:41:07,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:41:07" (1/1) ... [2019-11-06 22:41:07,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ec017b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:07, skipping insertion in model container [2019-11-06 22:41:07,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:41:07" (1/1) ... [2019-11-06 22:41:07,522 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:41:07,675 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:41:09,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:41:09,299 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:41:10,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:41:10,164 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:41:10,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:10 WrapperNode [2019-11-06 22:41:10,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:41:10,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:41:10,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:41:10,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:41:10,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:10" (1/1) ... [2019-11-06 22:41:10,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:10" (1/1) ... [2019-11-06 22:41:10,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:10" (1/1) ... [2019-11-06 22:41:10,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:10" (1/1) ... [2019-11-06 22:41:10,341 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:10" (1/1) ... [2019-11-06 22:41:10,367 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:10" (1/1) ... [2019-11-06 22:41:10,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:10" (1/1) ... [2019-11-06 22:41:10,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:41:10,420 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:41:10,420 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:41:10,420 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:41:10,421 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:41:10,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:41:10,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:41:10,493 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:41:10,493 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:41:10,493 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 22:41:10,495 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-11-06 22:41:10,495 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:41:10,497 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:41:10,497 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:41:10,499 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 22:41:10,499 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-11-06 22:41:10,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:41:10,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:41:10,501 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:41:10,501 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:41:10,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:41:10,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:41:15,016 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:41:15,016 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:41:15,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:41:15 BoogieIcfgContainer [2019-11-06 22:41:15,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:41:15,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:41:15,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:41:15,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:41:15,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:41:07" (1/3) ... [2019-11-06 22:41:15,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ae34a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:41:15, skipping insertion in model container [2019-11-06 22:41:15,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:10" (2/3) ... [2019-11-06 22:41:15,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ae34a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:41:15, skipping insertion in model container [2019-11-06 22:41:15,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:41:15" (3/3) ... [2019-11-06 22:41:15,033 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem04_label50.c [2019-11-06 22:41:15,045 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:41:15,055 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:41:15,067 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:41:15,103 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:41:15,103 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:41:15,104 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:41:15,104 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:41:15,104 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:41:15,104 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:41:15,104 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:41:15,104 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:41:15,139 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states. [2019-11-06 22:41:15,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 829 [2019-11-06 22:41:15,194 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:41:15,196 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:41:15,198 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:41:15,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:41:15,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1347224739, now seen corresponding path program 1 times [2019-11-06 22:41:15,214 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:41:15,214 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793089044] [2019-11-06 22:41:15,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:41:15,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:41:17,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:41:17,483 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793089044] [2019-11-06 22:41:17,484 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:41:17,485 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:41:17,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375614764] [2019-11-06 22:41:17,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:41:17,496 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:41:17,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:41:17,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:41:17,513 INFO L87 Difference]: Start difference. First operand 906 states. Second operand 3 states. [2019-11-06 22:41:22,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:41:22,178 INFO L93 Difference]: Finished difference Result 2644 states and 5099 transitions. [2019-11-06 22:41:22,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:41:22,182 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 828 [2019-11-06 22:41:22,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:41:22,221 INFO L225 Difference]: With dead ends: 2644 [2019-11-06 22:41:22,221 INFO L226 Difference]: Without dead ends: 1676 [2019-11-06 22:41:22,232 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 5 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:41:22,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2019-11-06 22:41:22,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1676. [2019-11-06 22:41:22,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1676 states. [2019-11-06 22:41:22,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 3124 transitions. [2019-11-06 22:41:22,384 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 3124 transitions. Word has length 828 [2019-11-06 22:41:22,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:41:22,387 INFO L462 AbstractCegarLoop]: Abstraction has 1676 states and 3124 transitions. [2019-11-06 22:41:22,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:41:22,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 3124 transitions. [2019-11-06 22:41:22,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 837 [2019-11-06 22:41:22,418 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:41:22,419 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:41:22,419 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:41:22,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:41:22,420 INFO L82 PathProgramCache]: Analyzing trace with hash -494477710, now seen corresponding path program 1 times [2019-11-06 22:41:22,420 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:41:22,421 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018078187] [2019-11-06 22:41:22,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:41:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:41:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:41:24,141 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018078187] [2019-11-06 22:41:24,141 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:41:24,142 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:41:24,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902388485] [2019-11-06 22:41:24,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:41:24,146 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:41:24,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:41:24,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:41:24,147 INFO L87 Difference]: Start difference. First operand 1676 states and 3124 transitions. Second operand 4 states. [2019-11-06 22:41:31,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:41:31,074 INFO L93 Difference]: Finished difference Result 6682 states and 12604 transitions. [2019-11-06 22:41:31,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:41:31,075 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 836 [2019-11-06 22:41:31,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:41:31,107 INFO L225 Difference]: With dead ends: 6682 [2019-11-06 22:41:31,107 INFO L226 Difference]: Without dead ends: 5012 [2019-11-06 22:41:31,113 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:41:31,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5012 states. [2019-11-06 22:41:31,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5012 to 5012. [2019-11-06 22:41:31,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5012 states. [2019-11-06 22:41:31,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5012 states to 5012 states and 8282 transitions. [2019-11-06 22:41:31,286 INFO L78 Accepts]: Start accepts. Automaton has 5012 states and 8282 transitions. Word has length 836 [2019-11-06 22:41:31,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:41:31,288 INFO L462 AbstractCegarLoop]: Abstraction has 5012 states and 8282 transitions. [2019-11-06 22:41:31,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:41:31,288 INFO L276 IsEmpty]: Start isEmpty. Operand 5012 states and 8282 transitions. [2019-11-06 22:41:31,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 848 [2019-11-06 22:41:31,311 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:41:31,312 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:41:31,313 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:41:31,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:41:31,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1286235444, now seen corresponding path program 1 times [2019-11-06 22:41:31,314 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:41:31,315 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422138702] [2019-11-06 22:41:31,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:41:31,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:41:33,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 22:41:33,096 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422138702] [2019-11-06 22:41:33,096 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632181960] [2019-11-06 22:41:33,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:41:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:41:33,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 22:41:33,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:41:34,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:41:34,184 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:41:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:41:34,692 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:41:34,692 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-11-06 22:41:34,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877924960] [2019-11-06 22:41:34,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:41:34,696 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:41:34,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:41:34,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:41:34,697 INFO L87 Difference]: Start difference. First operand 5012 states and 8282 transitions. Second operand 4 states.