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/systemc/transmitter.03.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:32:17,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:32:17,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:32:17,456 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:32:17,456 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:32:17,457 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:32:17,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:32:17,460 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:32:17,462 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:32:17,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:32:17,464 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:32:17,465 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:32:17,465 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:32:17,466 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:32:17,467 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:32:17,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:32:17,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:32:17,473 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:32:17,475 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:32:17,476 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:32:17,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:32:17,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:32:17,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:32:17,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:32:17,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:32:17,483 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:32:17,483 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:32:17,484 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:32:17,484 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:32:17,485 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:32:17,485 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:32:17,486 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:32:17,487 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:32:17,487 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:32:17,488 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:32:17,489 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:32:17,489 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:32:17,489 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:32:17,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:32:17,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:32:17,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:32:17,492 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 [2019-10-15 03:32:17,506 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:32:17,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:32:17,508 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:32:17,508 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:32:17,508 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:32:17,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:32:17,509 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:32:17,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:32:17,509 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:32:17,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:32:17,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:32:17,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:32:17,510 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:32:17,510 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:32:17,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:32:17,510 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:32:17,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:32:17,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:32:17,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:32:17,511 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:32:17,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:32:17,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:32:17,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:32:17,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:32:17,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:32:17,512 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:32:17,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:32:17,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:32:17,513 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 [2019-10-15 03:32:17,822 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:32:17,835 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:32:17,839 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:32:17,840 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:32:17,841 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:32:17,841 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/transmitter.03.cil.c [2019-10-15 03:32:17,915 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e80039d34/d0b02a69ed4f4bedb80ef15937377317/FLAG31aa518b4 [2019-10-15 03:32:18,399 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:32:18,400 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/transmitter.03.cil.c [2019-10-15 03:32:18,410 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e80039d34/d0b02a69ed4f4bedb80ef15937377317/FLAG31aa518b4 [2019-10-15 03:32:18,766 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e80039d34/d0b02a69ed4f4bedb80ef15937377317 [2019-10-15 03:32:18,776 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:32:18,778 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:32:18,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:32:18,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:32:18,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:32:18,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:32:18" (1/1) ... [2019-10-15 03:32:18,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f82b407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:18, skipping insertion in model container [2019-10-15 03:32:18,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:32:18" (1/1) ... [2019-10-15 03:32:18,797 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:32:18,854 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:32:19,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:32:19,178 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:32:19,386 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:32:19,410 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:32:19,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:19 WrapperNode [2019-10-15 03:32:19,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:32:19,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:32:19,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:32:19,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:32:19,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:19" (1/1) ... [2019-10-15 03:32:19,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:19" (1/1) ... [2019-10-15 03:32:19,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:19" (1/1) ... [2019-10-15 03:32:19,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:19" (1/1) ... [2019-10-15 03:32:19,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:19" (1/1) ... [2019-10-15 03:32:19,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:19" (1/1) ... [2019-10-15 03:32:19,459 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:19" (1/1) ... [2019-10-15 03:32:19,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:32:19,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:32:19,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:32:19,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:32:19,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:19" (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 [2019-10-15 03:32:19,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:32:19,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:32:19,524 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-15 03:32:19,524 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-10-15 03:32:19,524 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-10-15 03:32:19,525 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2019-10-15 03:32:19,525 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2019-10-15 03:32:19,525 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-10-15 03:32:19,525 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-10-15 03:32:19,525 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2019-10-15 03:32:19,526 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2019-10-15 03:32:19,526 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-10-15 03:32:19,526 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-15 03:32:19,526 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-15 03:32:19,526 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-15 03:32:19,526 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-10-15 03:32:19,527 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-10-15 03:32:19,527 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-10-15 03:32:19,527 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-10-15 03:32:19,527 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-10-15 03:32:19,527 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-10-15 03:32:19,527 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-15 03:32:19,528 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-15 03:32:19,528 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-15 03:32:19,528 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:32:19,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:32:19,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:32:19,528 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-15 03:32:19,529 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-10-15 03:32:19,529 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-10-15 03:32:19,529 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2019-10-15 03:32:19,529 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2019-10-15 03:32:19,529 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-10-15 03:32:19,530 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-10-15 03:32:19,530 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-10-15 03:32:19,530 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2019-10-15 03:32:19,530 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2019-10-15 03:32:19,530 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-10-15 03:32:19,530 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-15 03:32:19,531 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-15 03:32:19,531 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-15 03:32:19,531 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-10-15 03:32:19,531 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-10-15 03:32:19,531 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-10-15 03:32:19,531 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-10-15 03:32:19,532 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-10-15 03:32:19,532 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-15 03:32:19,532 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-15 03:32:19,532 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-15 03:32:19,532 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:32:19,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:32:19,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:32:20,559 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:32:20,559 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-15 03:32:20,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:32:20 BoogieIcfgContainer [2019-10-15 03:32:20,561 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:32:20,562 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:32:20,562 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:32:20,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:32:20,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:32:18" (1/3) ... [2019-10-15 03:32:20,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61440458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:32:20, skipping insertion in model container [2019-10-15 03:32:20,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:19" (2/3) ... [2019-10-15 03:32:20,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61440458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:32:20, skipping insertion in model container [2019-10-15 03:32:20,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:32:20" (3/3) ... [2019-10-15 03:32:20,570 INFO L109 eAbstractionObserver]: Analyzing ICFG transmitter.03.cil.c [2019-10-15 03:32:20,581 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:32:20,618 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:32:20,632 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:32:20,663 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:32:20,663 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:32:20,664 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:32:20,664 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:32:20,665 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:32:20,665 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:32:20,665 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:32:20,665 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:32:20,690 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states. [2019-10-15 03:32:20,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-15 03:32:20,700 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:20,702 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] [2019-10-15 03:32:20,704 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:20,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:20,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1794568052, now seen corresponding path program 1 times [2019-10-15 03:32:20,720 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:20,720 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165230417] [2019-10-15 03:32:20,721 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:20,721 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:20,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:32:21,075 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165230417] [2019-10-15 03:32:21,076 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:32:21,076 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:32:21,077 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277704765] [2019-10-15 03:32:21,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:21,082 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:21,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:21,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:21,099 INFO L87 Difference]: Start difference. First operand 140 states. Second operand 4 states. [2019-10-15 03:32:21,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:21,507 INFO L93 Difference]: Finished difference Result 379 states and 517 transitions. [2019-10-15 03:32:21,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:21,510 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2019-10-15 03:32:21,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:21,533 INFO L225 Difference]: With dead ends: 379 [2019-10-15 03:32:21,534 INFO L226 Difference]: Without dead ends: 243 [2019-10-15 03:32:21,545 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:21,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-10-15 03:32:21,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2019-10-15 03:32:21,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2019-10-15 03:32:21,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 301 transitions. [2019-10-15 03:32:21,635 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 301 transitions. Word has length 72 [2019-10-15 03:32:21,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:21,636 INFO L462 AbstractCegarLoop]: Abstraction has 239 states and 301 transitions. [2019-10-15 03:32:21,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:21,636 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 301 transitions. [2019-10-15 03:32:21,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-15 03:32:21,639 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:21,640 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] [2019-10-15 03:32:21,640 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:21,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:21,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1032195915, now seen corresponding path program 1 times [2019-10-15 03:32:21,641 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:21,641 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336400355] [2019-10-15 03:32:21,641 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:21,641 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:21,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:21,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:21,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:32:21,781 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336400355] [2019-10-15 03:32:21,781 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:32:21,782 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:32:21,782 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999598659] [2019-10-15 03:32:21,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:32:21,786 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:21,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:32:21,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:32:21,787 INFO L87 Difference]: Start difference. First operand 239 states and 301 transitions. Second operand 3 states. [2019-10-15 03:32:21,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:21,871 INFO L93 Difference]: Finished difference Result 675 states and 904 transitions. [2019-10-15 03:32:21,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:32:21,874 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2019-10-15 03:32:21,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:21,883 INFO L225 Difference]: With dead ends: 675 [2019-10-15 03:32:21,884 INFO L226 Difference]: Without dead ends: 452 [2019-10-15 03:32:21,887 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:32:21,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2019-10-15 03:32:21,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 452. [2019-10-15 03:32:21,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 452 states. [2019-10-15 03:32:21,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 593 transitions. [2019-10-15 03:32:21,970 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 593 transitions. Word has length 72 [2019-10-15 03:32:21,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:21,973 INFO L462 AbstractCegarLoop]: Abstraction has 452 states and 593 transitions. [2019-10-15 03:32:21,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:32:21,973 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 593 transitions. [2019-10-15 03:32:21,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-15 03:32:21,977 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:21,978 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 03:32:21,978 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:21,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:21,979 INFO L82 PathProgramCache]: Analyzing trace with hash 364690172, now seen corresponding path program 1 times [2019-10-15 03:32:21,979 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:21,979 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715742934] [2019-10-15 03:32:21,980 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:21,980 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:21,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:22,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 03:32:22,128 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715742934] [2019-10-15 03:32:22,128 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:32:22,128 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:32:22,129 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863065812] [2019-10-15 03:32:22,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:22,130 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:22,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:22,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:22,130 INFO L87 Difference]: Start difference. First operand 452 states and 593 transitions. Second operand 4 states. [2019-10-15 03:32:22,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:22,278 INFO L93 Difference]: Finished difference Result 1343 states and 1827 transitions. [2019-10-15 03:32:22,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:22,278 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2019-10-15 03:32:22,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:22,287 INFO L225 Difference]: With dead ends: 1343 [2019-10-15 03:32:22,287 INFO L226 Difference]: Without dead ends: 908 [2019-10-15 03:32:22,290 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:22,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2019-10-15 03:32:22,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 720. [2019-10-15 03:32:22,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 720 states. [2019-10-15 03:32:22,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 986 transitions. [2019-10-15 03:32:22,365 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 986 transitions. Word has length 87 [2019-10-15 03:32:22,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:22,365 INFO L462 AbstractCegarLoop]: Abstraction has 720 states and 986 transitions. [2019-10-15 03:32:22,365 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:22,366 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 986 transitions. [2019-10-15 03:32:22,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-15 03:32:22,370 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:22,371 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:22,371 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:22,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:22,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1578447092, now seen corresponding path program 1 times [2019-10-15 03:32:22,372 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:22,372 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514747011] [2019-10-15 03:32:22,372 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:22,372 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:22,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:22,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:22,473 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-15 03:32:22,474 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514747011] [2019-10-15 03:32:22,476 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:32:22,476 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:32:22,477 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457122910] [2019-10-15 03:32:22,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:32:22,479 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:22,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:32:22,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:32:22,480 INFO L87 Difference]: Start difference. First operand 720 states and 986 transitions. Second operand 3 states. [2019-10-15 03:32:22,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:22,574 INFO L93 Difference]: Finished difference Result 1900 states and 2642 transitions. [2019-10-15 03:32:22,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:32:22,575 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 128 [2019-10-15 03:32:22,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:22,585 INFO L225 Difference]: With dead ends: 1900 [2019-10-15 03:32:22,586 INFO L226 Difference]: Without dead ends: 1197 [2019-10-15 03:32:22,589 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:32:22,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2019-10-15 03:32:22,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 940. [2019-10-15 03:32:22,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 940 states. [2019-10-15 03:32:22,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1308 transitions. [2019-10-15 03:32:22,688 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1308 transitions. Word has length 128 [2019-10-15 03:32:22,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:22,690 INFO L462 AbstractCegarLoop]: Abstraction has 940 states and 1308 transitions. [2019-10-15 03:32:22,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:32:22,690 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1308 transitions. [2019-10-15 03:32:22,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-15 03:32:22,696 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:22,696 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:22,696 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:22,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:22,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1812736208, now seen corresponding path program 1 times [2019-10-15 03:32:22,697 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:22,697 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226378243] [2019-10-15 03:32:22,698 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:22,698 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:22,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 03:32:22,867 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226378243] [2019-10-15 03:32:22,867 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367038709] [2019-10-15 03:32:22,868 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 [2019-10-15 03:32:23,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:23,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:32:23,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 03:32:23,069 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 03:32:23,266 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:32:23,266 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5] total 6 [2019-10-15 03:32:23,266 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476503607] [2019-10-15 03:32:23,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:23,271 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:23,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:23,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:32:23,272 INFO L87 Difference]: Start difference. First operand 940 states and 1308 transitions. Second operand 4 states. [2019-10-15 03:32:23,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:23,624 INFO L93 Difference]: Finished difference Result 2755 states and 4105 transitions. [2019-10-15 03:32:23,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:23,625 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2019-10-15 03:32:23,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:23,638 INFO L225 Difference]: With dead ends: 2755 [2019-10-15 03:32:23,638 INFO L226 Difference]: Without dead ends: 1831 [2019-10-15 03:32:23,647 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:32:23,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2019-10-15 03:32:23,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1802. [2019-10-15 03:32:23,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1802 states. [2019-10-15 03:32:23,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 2480 transitions. [2019-10-15 03:32:23,822 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 2480 transitions. Word has length 129 [2019-10-15 03:32:23,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:23,823 INFO L462 AbstractCegarLoop]: Abstraction has 1802 states and 2480 transitions. [2019-10-15 03:32:23,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:23,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 2480 transitions. [2019-10-15 03:32:23,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-15 03:32:23,830 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:23,831 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:24,036 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:24,036 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:24,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:24,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1388662650, now seen corresponding path program 1 times [2019-10-15 03:32:24,037 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:24,037 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157703152] [2019-10-15 03:32:24,037 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:24,038 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:24,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:24,115 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-15 03:32:24,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157703152] [2019-10-15 03:32:24,116 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:32:24,116 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:32:24,116 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401320593] [2019-10-15 03:32:24,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:32:24,117 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:24,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:32:24,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:32:24,117 INFO L87 Difference]: Start difference. First operand 1802 states and 2480 transitions. Second operand 3 states. [2019-10-15 03:32:24,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:24,342 INFO L93 Difference]: Finished difference Result 4711 states and 6541 transitions. [2019-10-15 03:32:24,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:32:24,342 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 129 [2019-10-15 03:32:24,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:24,362 INFO L225 Difference]: With dead ends: 4711 [2019-10-15 03:32:24,362 INFO L226 Difference]: Without dead ends: 2926 [2019-10-15 03:32:24,374 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:32:24,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2019-10-15 03:32:24,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2520. [2019-10-15 03:32:24,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2520 states. [2019-10-15 03:32:24,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 3435 transitions. [2019-10-15 03:32:24,587 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 3435 transitions. Word has length 129 [2019-10-15 03:32:24,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:24,588 INFO L462 AbstractCegarLoop]: Abstraction has 2520 states and 3435 transitions. [2019-10-15 03:32:24,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:32:24,588 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 3435 transitions. [2019-10-15 03:32:24,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-15 03:32:24,594 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:24,594 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:24,595 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:24,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:24,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1272031359, now seen corresponding path program 1 times [2019-10-15 03:32:24,595 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:24,595 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075687908] [2019-10-15 03:32:24,596 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:24,596 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:24,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-15 03:32:24,672 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075687908] [2019-10-15 03:32:24,672 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207333621] [2019-10-15 03:32:24,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:24,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:32:24,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 03:32:24,852 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:25,047 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-15 03:32:25,048 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:32:25,048 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5] total 6 [2019-10-15 03:32:25,048 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182239067] [2019-10-15 03:32:25,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:25,049 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:25,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:25,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:32:25,050 INFO L87 Difference]: Start difference. First operand 2520 states and 3435 transitions. Second operand 4 states. [2019-10-15 03:32:25,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:25,490 INFO L93 Difference]: Finished difference Result 7416 states and 10613 transitions. [2019-10-15 03:32:25,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:25,490 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2019-10-15 03:32:25,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:25,532 INFO L225 Difference]: With dead ends: 7416 [2019-10-15 03:32:25,532 INFO L226 Difference]: Without dead ends: 4912 [2019-10-15 03:32:25,564 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:32:25,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4912 states. [2019-10-15 03:32:25,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4912 to 4799. [2019-10-15 03:32:25,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4799 states. [2019-10-15 03:32:25,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4799 states to 4799 states and 6393 transitions. [2019-10-15 03:32:25,947 INFO L78 Accepts]: Start accepts. Automaton has 4799 states and 6393 transitions. Word has length 130 [2019-10-15 03:32:25,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:25,948 INFO L462 AbstractCegarLoop]: Abstraction has 4799 states and 6393 transitions. [2019-10-15 03:32:25,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:25,949 INFO L276 IsEmpty]: Start isEmpty. Operand 4799 states and 6393 transitions. [2019-10-15 03:32:25,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-15 03:32:25,957 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:25,957 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:26,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:26,162 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:26,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:26,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1430687984, now seen corresponding path program 1 times [2019-10-15 03:32:26,163 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:26,164 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930077660] [2019-10-15 03:32:26,164 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:26,164 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:26,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:26,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-15 03:32:26,234 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930077660] [2019-10-15 03:32:26,234 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:32:26,237 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:32:26,239 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099502583] [2019-10-15 03:32:26,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:32:26,239 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:26,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:32:26,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:32:26,240 INFO L87 Difference]: Start difference. First operand 4799 states and 6393 transitions. Second operand 3 states. [2019-10-15 03:32:26,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:26,628 INFO L93 Difference]: Finished difference Result 12672 states and 17268 transitions. [2019-10-15 03:32:26,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:32:26,628 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 129 [2019-10-15 03:32:26,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:26,677 INFO L225 Difference]: With dead ends: 12672 [2019-10-15 03:32:26,678 INFO L226 Difference]: Without dead ends: 7890 [2019-10-15 03:32:26,714 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:32:26,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7890 states. [2019-10-15 03:32:27,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7890 to 7289. [2019-10-15 03:32:27,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7289 states. [2019-10-15 03:32:27,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7289 states to 7289 states and 9700 transitions. [2019-10-15 03:32:27,188 INFO L78 Accepts]: Start accepts. Automaton has 7289 states and 9700 transitions. Word has length 129 [2019-10-15 03:32:27,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:27,189 INFO L462 AbstractCegarLoop]: Abstraction has 7289 states and 9700 transitions. [2019-10-15 03:32:27,189 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:32:27,189 INFO L276 IsEmpty]: Start isEmpty. Operand 7289 states and 9700 transitions. [2019-10-15 03:32:27,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-15 03:32:27,199 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:27,199 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:27,200 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:27,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:27,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1613504212, now seen corresponding path program 1 times [2019-10-15 03:32:27,200 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:27,200 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764744153] [2019-10-15 03:32:27,201 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:27,201 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:27,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:27,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:27,304 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 03:32:27,305 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764744153] [2019-10-15 03:32:27,305 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:32:27,306 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:32:27,306 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824007085] [2019-10-15 03:32:27,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:27,307 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:27,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:27,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:27,308 INFO L87 Difference]: Start difference. First operand 7289 states and 9700 transitions. Second operand 4 states. [2019-10-15 03:32:27,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:27,991 INFO L93 Difference]: Finished difference Result 15665 states and 20839 transitions. [2019-10-15 03:32:27,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:27,992 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2019-10-15 03:32:27,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:28,052 INFO L225 Difference]: With dead ends: 15665 [2019-10-15 03:32:28,054 INFO L226 Difference]: Without dead ends: 8393 [2019-10-15 03:32:28,089 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:28,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8393 states. [2019-10-15 03:32:28,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8393 to 8377. [2019-10-15 03:32:28,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8377 states. [2019-10-15 03:32:28,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8377 states to 8377 states and 10906 transitions. [2019-10-15 03:32:28,587 INFO L78 Accepts]: Start accepts. Automaton has 8377 states and 10906 transitions. Word has length 130 [2019-10-15 03:32:28,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:28,588 INFO L462 AbstractCegarLoop]: Abstraction has 8377 states and 10906 transitions. [2019-10-15 03:32:28,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:28,588 INFO L276 IsEmpty]: Start isEmpty. Operand 8377 states and 10906 transitions. [2019-10-15 03:32:28,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-15 03:32:28,599 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:28,599 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:28,600 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:28,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:28,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1495307938, now seen corresponding path program 1 times [2019-10-15 03:32:28,600 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:28,601 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569842467] [2019-10-15 03:32:28,601 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:28,601 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:28,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 03:32:28,731 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569842467] [2019-10-15 03:32:28,731 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:32:28,731 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-15 03:32:28,731 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329066801] [2019-10-15 03:32:28,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 03:32:28,732 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:28,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 03:32:28,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-15 03:32:28,733 INFO L87 Difference]: Start difference. First operand 8377 states and 10906 transitions. Second operand 9 states. [2019-10-15 03:32:30,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:30,664 INFO L93 Difference]: Finished difference Result 25960 states and 35023 transitions. [2019-10-15 03:32:30,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 03:32:30,669 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2019-10-15 03:32:30,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:30,873 INFO L225 Difference]: With dead ends: 25960 [2019-10-15 03:32:30,874 INFO L226 Difference]: Without dead ends: 12115 [2019-10-15 03:32:30,925 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2019-10-15 03:32:30,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12115 states. [2019-10-15 03:32:31,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12115 to 10947. [2019-10-15 03:32:31,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10947 states. [2019-10-15 03:32:31,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10947 states to 10947 states and 14399 transitions. [2019-10-15 03:32:31,508 INFO L78 Accepts]: Start accepts. Automaton has 10947 states and 14399 transitions. Word has length 131 [2019-10-15 03:32:31,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:31,509 INFO L462 AbstractCegarLoop]: Abstraction has 10947 states and 14399 transitions. [2019-10-15 03:32:31,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 03:32:31,509 INFO L276 IsEmpty]: Start isEmpty. Operand 10947 states and 14399 transitions. [2019-10-15 03:32:31,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-15 03:32:31,524 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:31,524 INFO L380 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:31,524 INFO L410 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:31,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:31,525 INFO L82 PathProgramCache]: Analyzing trace with hash 519823223, now seen corresponding path program 1 times [2019-10-15 03:32:31,525 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:31,525 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916374438] [2019-10-15 03:32:31,525 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:31,525 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:31,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:31,940 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-10-15 03:32:31,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916374438] [2019-10-15 03:32:31,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683494797] [2019-10-15 03:32:31,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:32,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-15 03:32:32,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:32,930 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 03:32:32,930 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:33,148 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:32:33,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:32:33,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:32:33,273 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:32:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-15 03:32:33,304 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:32:33,304 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [20, 8] total 33 [2019-10-15 03:32:33,304 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195124604] [2019-10-15 03:32:33,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 03:32:33,306 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:33,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 03:32:33,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2019-10-15 03:32:33,307 INFO L87 Difference]: Start difference. First operand 10947 states and 14399 transitions. Second operand 11 states. [2019-10-15 03:32:35,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:35,759 INFO L93 Difference]: Finished difference Result 28771 states and 40434 transitions. [2019-10-15 03:32:35,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-15 03:32:35,759 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 154 [2019-10-15 03:32:35,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:35,879 INFO L225 Difference]: With dead ends: 28771 [2019-10-15 03:32:35,879 INFO L226 Difference]: Without dead ends: 17841 [2019-10-15 03:32:36,056 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 300 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=285, Invalid=1877, Unknown=0, NotChecked=0, Total=2162 [2019-10-15 03:32:36,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17841 states. [2019-10-15 03:32:37,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17841 to 16762. [2019-10-15 03:32:37,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16762 states. [2019-10-15 03:32:37,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16762 states to 16762 states and 22832 transitions. [2019-10-15 03:32:37,583 INFO L78 Accepts]: Start accepts. Automaton has 16762 states and 22832 transitions. Word has length 154 [2019-10-15 03:32:37,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:37,583 INFO L462 AbstractCegarLoop]: Abstraction has 16762 states and 22832 transitions. [2019-10-15 03:32:37,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 03:32:37,584 INFO L276 IsEmpty]: Start isEmpty. Operand 16762 states and 22832 transitions. [2019-10-15 03:32:37,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-15 03:32:37,594 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:37,594 INFO L380 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:37,798 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:37,798 INFO L410 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:37,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:37,799 INFO L82 PathProgramCache]: Analyzing trace with hash 743000243, now seen corresponding path program 1 times [2019-10-15 03:32:37,799 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:37,799 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899501381] [2019-10-15 03:32:37,799 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:37,799 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:37,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:37,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:37,961 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-15 03:32:37,961 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899501381] [2019-10-15 03:32:37,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561002000] [2019-10-15 03:32:37,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:38,123 INFO L256 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 03:32:38,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 03:32:38,232 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:38,482 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2019-10-15 03:32:38,610 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2019-10-15 03:32:38,907 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2019-10-15 03:32:39,008 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-15 03:32:39,008 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:32:39,009 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 6] total 18 [2019-10-15 03:32:39,009 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771723279] [2019-10-15 03:32:39,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 03:32:39,010 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:39,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 03:32:39,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2019-10-15 03:32:39,010 INFO L87 Difference]: Start difference. First operand 16762 states and 22832 transitions. Second operand 6 states. [2019-10-15 03:32:39,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:39,687 INFO L93 Difference]: Finished difference Result 30604 states and 42010 transitions. [2019-10-15 03:32:39,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 03:32:39,688 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 156 [2019-10-15 03:32:39,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:39,755 INFO L225 Difference]: With dead ends: 30604 [2019-10-15 03:32:39,755 INFO L226 Difference]: Without dead ends: 13859 [2019-10-15 03:32:39,822 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2019-10-15 03:32:39,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13859 states. [2019-10-15 03:32:41,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13859 to 11119. [2019-10-15 03:32:41,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11119 states. [2019-10-15 03:32:41,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11119 states to 11119 states and 14519 transitions. [2019-10-15 03:32:41,233 INFO L78 Accepts]: Start accepts. Automaton has 11119 states and 14519 transitions. Word has length 156 [2019-10-15 03:32:41,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:41,234 INFO L462 AbstractCegarLoop]: Abstraction has 11119 states and 14519 transitions. [2019-10-15 03:32:41,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 03:32:41,234 INFO L276 IsEmpty]: Start isEmpty. Operand 11119 states and 14519 transitions. [2019-10-15 03:32:41,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-15 03:32:41,245 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:41,246 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:41,449 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:41,450 INFO L410 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:41,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:41,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1896392692, now seen corresponding path program 1 times [2019-10-15 03:32:41,450 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:41,450 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445587739] [2019-10-15 03:32:41,451 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:41,451 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:41,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:41,600 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-15 03:32:41,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445587739] [2019-10-15 03:32:41,601 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:32:41,601 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-15 03:32:41,601 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984024874] [2019-10-15 03:32:41,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 03:32:41,602 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:41,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 03:32:41,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:32:41,603 INFO L87 Difference]: Start difference. First operand 11119 states and 14519 transitions. Second operand 8 states. [2019-10-15 03:32:42,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:42,477 INFO L93 Difference]: Finished difference Result 20251 states and 27372 transitions. [2019-10-15 03:32:42,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 03:32:42,482 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 177 [2019-10-15 03:32:42,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:42,527 INFO L225 Difference]: With dead ends: 20251 [2019-10-15 03:32:42,527 INFO L226 Difference]: Without dead ends: 10022 [2019-10-15 03:32:42,572 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-15 03:32:42,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10022 states. [2019-10-15 03:32:43,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10022 to 9464. [2019-10-15 03:32:43,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9464 states. [2019-10-15 03:32:43,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9464 states to 9464 states and 11917 transitions. [2019-10-15 03:32:43,259 INFO L78 Accepts]: Start accepts. Automaton has 9464 states and 11917 transitions. Word has length 177 [2019-10-15 03:32:43,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:43,259 INFO L462 AbstractCegarLoop]: Abstraction has 9464 states and 11917 transitions. [2019-10-15 03:32:43,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 03:32:43,259 INFO L276 IsEmpty]: Start isEmpty. Operand 9464 states and 11917 transitions. [2019-10-15 03:32:43,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-15 03:32:43,268 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:43,268 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:43,268 INFO L410 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:43,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:43,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1288906095, now seen corresponding path program 1 times [2019-10-15 03:32:43,269 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:43,269 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847491609] [2019-10-15 03:32:43,269 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:43,270 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:43,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-10-15 03:32:43,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847491609] [2019-10-15 03:32:43,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682625273] [2019-10-15 03:32:43,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:43,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-15 03:32:43,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-10-15 03:32:43,610 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:43,794 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:32:43,897 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:32:43,898 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:32:43,912 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:32:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-15 03:32:43,939 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:32:43,939 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 7] total 14 [2019-10-15 03:32:43,940 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991949940] [2019-10-15 03:32:43,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 03:32:43,940 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:43,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 03:32:43,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-10-15 03:32:43,941 INFO L87 Difference]: Start difference. First operand 9464 states and 11917 transitions. Second operand 9 states. [2019-10-15 03:32:45,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:45,326 INFO L93 Difference]: Finished difference Result 21188 states and 28557 transitions. [2019-10-15 03:32:45,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-15 03:32:45,327 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 178 [2019-10-15 03:32:45,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:45,383 INFO L225 Difference]: With dead ends: 21188 [2019-10-15 03:32:45,384 INFO L226 Difference]: Without dead ends: 12276 [2019-10-15 03:32:45,416 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2019-10-15 03:32:45,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12276 states. [2019-10-15 03:32:46,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12276 to 11556. [2019-10-15 03:32:46,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11556 states. [2019-10-15 03:32:46,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11556 states to 11556 states and 15078 transitions. [2019-10-15 03:32:46,059 INFO L78 Accepts]: Start accepts. Automaton has 11556 states and 15078 transitions. Word has length 178 [2019-10-15 03:32:46,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:46,059 INFO L462 AbstractCegarLoop]: Abstraction has 11556 states and 15078 transitions. [2019-10-15 03:32:46,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 03:32:46,059 INFO L276 IsEmpty]: Start isEmpty. Operand 11556 states and 15078 transitions. [2019-10-15 03:32:46,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-15 03:32:46,068 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:46,068 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:46,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:46,274 INFO L410 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:46,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:46,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1622875971, now seen corresponding path program 1 times [2019-10-15 03:32:46,274 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:46,274 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881234658] [2019-10-15 03:32:46,274 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:46,274 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:46,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:46,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-10-15 03:32:46,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881234658] [2019-10-15 03:32:46,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034699088] [2019-10-15 03:32:46,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:46,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:46,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 45 conjunts are in the unsatisfiable core [2019-10-15 03:32:46,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 71 proven. 18 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 03:32:46,761 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:47,105 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-10-15 03:32:47,105 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [581823424] [2019-10-15 03:32:47,133 INFO L162 IcfgInterpreter]: Started Sifa with 99 locations of interest [2019-10-15 03:32:47,134 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:32:47,140 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:32:47,147 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:32:47,147 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:32:47,402 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 58 for LOIs [2019-10-15 03:32:47,444 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 99 for LOIs [2019-10-15 03:32:47,873 INFO L199 IcfgInterpreter]: Interpreting procedure init_model with input of size 63 for LOIs [2019-10-15 03:32:47,932 INFO L199 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 106 for LOIs [2019-10-15 03:32:49,071 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-10-15 03:32:49,136 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7