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.04.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:27:17,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:27:17,512 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:27:17,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:27:17,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:27:17,531 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:27:17,533 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:27:17,535 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:27:17,537 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:27:17,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:27:17,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:27:17,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:27:17,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:27:17,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:27:17,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:27:17,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:27:17,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:27:17,550 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:27:17,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:27:17,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:27:17,560 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:27:17,562 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:27:17,564 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:27:17,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:27:17,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:27:17,571 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:27:17,571 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:27:17,572 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:27:17,572 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:27:17,573 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:27:17,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:27:17,574 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:27:17,575 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:27:17,576 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:27:17,577 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:27:17,577 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:27:17,578 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:27:17,578 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:27:17,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:27:17,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:27:17,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:27:17,581 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 23:27:17,602 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:27:17,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:27:17,605 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:27:17,605 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:27:17,605 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:27:17,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:27:17,606 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:27:17,606 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:27:17,607 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:27:17,607 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:27:17,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:27:17,608 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:27:17,608 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:27:17,609 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:27:17,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:27:17,609 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:27:17,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:27:17,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:27:17,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:27:17,610 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:27:17,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:27:17,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:27:17,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:27:17,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:27:17,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:27:17,612 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:27:17,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:27:17,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:27:17,612 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-13 23:27:17,907 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:27:17,917 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:27:17,921 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:27:17,923 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:27:17,924 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:27:17,925 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/transmitter.04.cil.c [2019-10-13 23:27:18,003 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01ce16e77/6bde47b419714706abf662b2092f6699/FLAG8252f7b64 [2019-10-13 23:27:18,530 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:27:18,531 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/transmitter.04.cil.c [2019-10-13 23:27:18,553 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01ce16e77/6bde47b419714706abf662b2092f6699/FLAG8252f7b64 [2019-10-13 23:27:18,872 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01ce16e77/6bde47b419714706abf662b2092f6699 [2019-10-13 23:27:18,883 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:27:18,884 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:27:18,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:27:18,886 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:27:18,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:27:18,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:27:18" (1/1) ... [2019-10-13 23:27:18,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18da5b9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:18, skipping insertion in model container [2019-10-13 23:27:18,894 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:27:18" (1/1) ... [2019-10-13 23:27:18,902 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:27:18,965 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:27:19,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:27:19,249 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:27:19,394 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:27:19,422 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:27:19,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:19 WrapperNode [2019-10-13 23:27:19,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:27:19,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:27:19,424 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:27:19,424 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:27:19,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:19" (1/1) ... [2019-10-13 23:27:19,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:19" (1/1) ... [2019-10-13 23:27:19,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:19" (1/1) ... [2019-10-13 23:27:19,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:19" (1/1) ... [2019-10-13 23:27:19,462 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:19" (1/1) ... [2019-10-13 23:27:19,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:19" (1/1) ... [2019-10-13 23:27:19,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:19" (1/1) ... [2019-10-13 23:27:19,485 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:27:19,486 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:27:19,486 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:27:19,486 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:27:19,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:19" (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 [2019-10-13 23:27:19,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:27:19,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:27:19,543 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-13 23:27:19,543 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-10-13 23:27:19,543 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-10-13 23:27:19,544 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2019-10-13 23:27:19,544 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2019-10-13 23:27:19,544 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2019-10-13 23:27:19,544 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-10-13 23:27:19,544 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-10-13 23:27:19,545 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2019-10-13 23:27:19,545 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2019-10-13 23:27:19,545 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2019-10-13 23:27:19,545 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-10-13 23:27:19,545 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-13 23:27:19,545 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-13 23:27:19,546 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-13 23:27:19,546 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-10-13 23:27:19,546 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-10-13 23:27:19,546 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-10-13 23:27:19,546 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-10-13 23:27:19,547 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-10-13 23:27:19,547 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-10-13 23:27:19,547 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-13 23:27:19,547 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-13 23:27:19,547 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-13 23:27:19,547 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:27:19,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:27:19,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:27:19,548 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-13 23:27:19,548 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-10-13 23:27:19,548 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-10-13 23:27:19,548 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2019-10-13 23:27:19,549 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2019-10-13 23:27:19,549 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2019-10-13 23:27:19,549 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-10-13 23:27:19,549 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-10-13 23:27:19,549 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-10-13 23:27:19,550 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2019-10-13 23:27:19,550 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2019-10-13 23:27:19,550 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2019-10-13 23:27:19,550 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-10-13 23:27:19,550 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-13 23:27:19,550 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-13 23:27:19,550 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-13 23:27:19,551 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-10-13 23:27:19,551 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-10-13 23:27:19,551 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-10-13 23:27:19,551 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-10-13 23:27:19,551 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-10-13 23:27:19,551 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-13 23:27:19,551 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-13 23:27:19,552 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-13 23:27:19,552 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:27:19,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:27:19,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:27:20,857 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:27:20,857 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-13 23:27:20,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:27:20 BoogieIcfgContainer [2019-10-13 23:27:20,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:27:20,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:27:20,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:27:20,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:27:20,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:27:18" (1/3) ... [2019-10-13 23:27:20,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68acc5a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:27:20, skipping insertion in model container [2019-10-13 23:27:20,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:19" (2/3) ... [2019-10-13 23:27:20,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68acc5a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:27:20, skipping insertion in model container [2019-10-13 23:27:20,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:27:20" (3/3) ... [2019-10-13 23:27:20,869 INFO L109 eAbstractionObserver]: Analyzing ICFG transmitter.04.cil.c [2019-10-13 23:27:20,881 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:27:20,892 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:27:20,905 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:27:20,939 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:27:20,939 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:27:20,939 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:27:20,939 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:27:20,940 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:27:20,940 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:27:20,940 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:27:20,941 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:27:20,987 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states. [2019-10-13 23:27:21,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-13 23:27:21,005 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:21,007 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:21,009 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:21,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:21,016 INFO L82 PathProgramCache]: Analyzing trace with hash 278306888, now seen corresponding path program 1 times [2019-10-13 23:27:21,026 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:21,027 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589216126] [2019-10-13 23:27:21,027 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:21,027 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:21,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:21,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:21,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:27:21,515 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589216126] [2019-10-13 23:27:21,516 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:21,526 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:27:21,527 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628864650] [2019-10-13 23:27:21,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:21,533 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:21,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:21,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:21,556 INFO L87 Difference]: Start difference. First operand 157 states. Second operand 4 states. [2019-10-13 23:27:22,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:22,032 INFO L93 Difference]: Finished difference Result 432 states and 596 transitions. [2019-10-13 23:27:22,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:22,034 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2019-10-13 23:27:22,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:22,051 INFO L225 Difference]: With dead ends: 432 [2019-10-13 23:27:22,052 INFO L226 Difference]: Without dead ends: 279 [2019-10-13 23:27:22,058 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:22,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2019-10-13 23:27:22,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 275. [2019-10-13 23:27:22,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2019-10-13 23:27:22,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 351 transitions. [2019-10-13 23:27:22,156 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 351 transitions. Word has length 80 [2019-10-13 23:27:22,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:22,157 INFO L462 AbstractCegarLoop]: Abstraction has 275 states and 351 transitions. [2019-10-13 23:27:22,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:22,158 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 351 transitions. [2019-10-13 23:27:22,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-13 23:27:22,162 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:22,163 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:22,163 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:22,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:22,164 INFO L82 PathProgramCache]: Analyzing trace with hash -2118130103, now seen corresponding path program 1 times [2019-10-13 23:27:22,164 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:22,164 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056543871] [2019-10-13 23:27:22,164 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:22,165 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:22,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:22,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:27:22,399 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056543871] [2019-10-13 23:27:22,399 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:22,399 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:27:22,399 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381353879] [2019-10-13 23:27:22,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:22,405 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:22,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:22,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:22,405 INFO L87 Difference]: Start difference. First operand 275 states and 351 transitions. Second operand 4 states. [2019-10-13 23:27:22,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:22,748 INFO L93 Difference]: Finished difference Result 784 states and 1055 transitions. [2019-10-13 23:27:22,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:22,750 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2019-10-13 23:27:22,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:22,762 INFO L225 Difference]: With dead ends: 784 [2019-10-13 23:27:22,762 INFO L226 Difference]: Without dead ends: 525 [2019-10-13 23:27:22,766 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 [2019-10-13 23:27:22,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2019-10-13 23:27:22,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 520. [2019-10-13 23:27:22,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2019-10-13 23:27:22,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 660 transitions. [2019-10-13 23:27:22,853 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 660 transitions. Word has length 80 [2019-10-13 23:27:22,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:22,854 INFO L462 AbstractCegarLoop]: Abstraction has 520 states and 660 transitions. [2019-10-13 23:27:22,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:22,854 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 660 transitions. [2019-10-13 23:27:22,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-13 23:27:22,864 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:22,864 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:22,865 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:22,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:22,866 INFO L82 PathProgramCache]: Analyzing trace with hash 412020584, now seen corresponding path program 1 times [2019-10-13 23:27:22,866 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:22,866 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017844805] [2019-10-13 23:27:22,867 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:22,867 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:22,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:27:23,037 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017844805] [2019-10-13 23:27:23,037 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:23,037 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:27:23,037 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567391177] [2019-10-13 23:27:23,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:23,039 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:23,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:23,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:23,039 INFO L87 Difference]: Start difference. First operand 520 states and 660 transitions. Second operand 4 states. [2019-10-13 23:27:23,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:23,388 INFO L93 Difference]: Finished difference Result 1512 states and 2034 transitions. [2019-10-13 23:27:23,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:23,389 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2019-10-13 23:27:23,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:23,397 INFO L225 Difference]: With dead ends: 1512 [2019-10-13 23:27:23,398 INFO L226 Difference]: Without dead ends: 1008 [2019-10-13 23:27:23,401 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:23,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2019-10-13 23:27:23,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 999. [2019-10-13 23:27:23,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 999 states. [2019-10-13 23:27:23,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1261 transitions. [2019-10-13 23:27:23,477 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1261 transitions. Word has length 80 [2019-10-13 23:27:23,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:23,478 INFO L462 AbstractCegarLoop]: Abstraction has 999 states and 1261 transitions. [2019-10-13 23:27:23,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:23,478 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1261 transitions. [2019-10-13 23:27:23,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-13 23:27:23,482 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:23,482 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:23,482 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:23,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:23,483 INFO L82 PathProgramCache]: Analyzing trace with hash -131310214, now seen corresponding path program 1 times [2019-10-13 23:27:23,483 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:23,483 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252117315] [2019-10-13 23:27:23,483 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:23,484 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:23,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:27:23,575 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252117315] [2019-10-13 23:27:23,575 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:23,575 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:27:23,575 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992106938] [2019-10-13 23:27:23,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:23,576 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:23,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:23,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:23,577 INFO L87 Difference]: Start difference. First operand 999 states and 1261 transitions. Second operand 4 states. [2019-10-13 23:27:23,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:23,806 INFO L93 Difference]: Finished difference Result 3057 states and 3972 transitions. [2019-10-13 23:27:23,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:23,807 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2019-10-13 23:27:23,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:23,824 INFO L225 Difference]: With dead ends: 3057 [2019-10-13 23:27:23,824 INFO L226 Difference]: Without dead ends: 2075 [2019-10-13 23:27:23,830 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 [2019-10-13 23:27:23,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2019-10-13 23:27:23,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 1389. [2019-10-13 23:27:23,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1389 states. [2019-10-13 23:27:23,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 1848 transitions. [2019-10-13 23:27:23,993 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 1848 transitions. Word has length 96 [2019-10-13 23:27:23,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:23,994 INFO L462 AbstractCegarLoop]: Abstraction has 1389 states and 1848 transitions. [2019-10-13 23:27:23,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:23,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 1848 transitions. [2019-10-13 23:27:24,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-13 23:27:24,002 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:24,002 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:24,003 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:24,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:24,003 INFO L82 PathProgramCache]: Analyzing trace with hash -427602276, now seen corresponding path program 1 times [2019-10-13 23:27:24,003 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:24,004 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944173194] [2019-10-13 23:27:24,004 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:24,004 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:24,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:24,101 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-13 23:27:24,102 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944173194] [2019-10-13 23:27:24,102 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:24,102 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:27:24,103 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280225593] [2019-10-13 23:27:24,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:27:24,103 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:24,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:27:24,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:27:24,104 INFO L87 Difference]: Start difference. First operand 1389 states and 1848 transitions. Second operand 3 states. [2019-10-13 23:27:24,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:24,251 INFO L93 Difference]: Finished difference Result 3601 states and 4907 transitions. [2019-10-13 23:27:24,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:27:24,252 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 144 [2019-10-13 23:27:24,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:24,272 INFO L225 Difference]: With dead ends: 3601 [2019-10-13 23:27:24,273 INFO L226 Difference]: Without dead ends: 2229 [2019-10-13 23:27:24,283 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 [2019-10-13 23:27:24,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2019-10-13 23:27:24,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 1917. [2019-10-13 23:27:24,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1917 states. [2019-10-13 23:27:24,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2616 transitions. [2019-10-13 23:27:24,462 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2616 transitions. Word has length 144 [2019-10-13 23:27:24,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:24,463 INFO L462 AbstractCegarLoop]: Abstraction has 1917 states and 2616 transitions. [2019-10-13 23:27:24,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:27:24,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2616 transitions. [2019-10-13 23:27:24,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-13 23:27:24,476 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:24,476 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:24,477 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:24,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:24,477 INFO L82 PathProgramCache]: Analyzing trace with hash 232824637, now seen corresponding path program 1 times [2019-10-13 23:27:24,478 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:24,478 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75840876] [2019-10-13 23:27:24,478 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:24,478 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:24,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 23:27:24,708 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75840876] [2019-10-13 23:27:24,708 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070558051] [2019-10-13 23:27:24,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:24,910 INFO L256 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:27:24,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 23:27:24,978 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 23:27:25,185 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:27:25,186 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-13 23:27:25,186 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354118183] [2019-10-13 23:27:25,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:25,187 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:25,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:25,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:27:25,188 INFO L87 Difference]: Start difference. First operand 1917 states and 2616 transitions. Second operand 4 states. [2019-10-13 23:27:25,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:25,840 INFO L93 Difference]: Finished difference Result 5662 states and 8096 transitions. [2019-10-13 23:27:25,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:25,841 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2019-10-13 23:27:25,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:25,881 INFO L225 Difference]: With dead ends: 5662 [2019-10-13 23:27:25,881 INFO L226 Difference]: Without dead ends: 3761 [2019-10-13 23:27:25,904 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:27:25,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2019-10-13 23:27:26,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 3701. [2019-10-13 23:27:26,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3701 states. [2019-10-13 23:27:26,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3701 states to 3701 states and 5024 transitions. [2019-10-13 23:27:26,203 INFO L78 Accepts]: Start accepts. Automaton has 3701 states and 5024 transitions. Word has length 145 [2019-10-13 23:27:26,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:26,203 INFO L462 AbstractCegarLoop]: Abstraction has 3701 states and 5024 transitions. [2019-10-13 23:27:26,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:26,204 INFO L276 IsEmpty]: Start isEmpty. Operand 3701 states and 5024 transitions. [2019-10-13 23:27:26,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-13 23:27:26,216 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:26,217 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:26,423 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:26,424 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:26,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:26,424 INFO L82 PathProgramCache]: Analyzing trace with hash -2106707675, now seen corresponding path program 1 times [2019-10-13 23:27:26,424 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:26,424 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726983920] [2019-10-13 23:27:26,425 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:26,425 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:26,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:26,573 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-13 23:27:26,574 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726983920] [2019-10-13 23:27:26,574 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:26,574 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:27:26,574 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371385202] [2019-10-13 23:27:26,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:27:26,575 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:26,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:27:26,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:27:26,576 INFO L87 Difference]: Start difference. First operand 3701 states and 5024 transitions. Second operand 3 states. [2019-10-13 23:27:26,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:26,949 INFO L93 Difference]: Finished difference Result 9555 states and 13238 transitions. [2019-10-13 23:27:26,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:27:26,949 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 146 [2019-10-13 23:27:26,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:26,989 INFO L225 Difference]: With dead ends: 9555 [2019-10-13 23:27:26,990 INFO L226 Difference]: Without dead ends: 5871 [2019-10-13 23:27:27,017 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 [2019-10-13 23:27:27,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5871 states. [2019-10-13 23:27:27,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5871 to 5395. [2019-10-13 23:27:27,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5395 states. [2019-10-13 23:27:27,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5395 states to 5395 states and 7378 transitions. [2019-10-13 23:27:27,474 INFO L78 Accepts]: Start accepts. Automaton has 5395 states and 7378 transitions. Word has length 146 [2019-10-13 23:27:27,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:27,476 INFO L462 AbstractCegarLoop]: Abstraction has 5395 states and 7378 transitions. [2019-10-13 23:27:27,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:27:27,477 INFO L276 IsEmpty]: Start isEmpty. Operand 5395 states and 7378 transitions. [2019-10-13 23:27:27,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-13 23:27:27,492 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:27,492 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:27,493 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:27,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:27,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1200881990, now seen corresponding path program 1 times [2019-10-13 23:27:27,493 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:27,494 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012317965] [2019-10-13 23:27:27,494 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:27,494 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:27,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-13 23:27:27,616 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012317965] [2019-10-13 23:27:27,616 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:27,616 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:27:27,617 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033959041] [2019-10-13 23:27:27,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:27,619 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:27,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:27,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:27,619 INFO L87 Difference]: Start difference. First operand 5395 states and 7378 transitions. Second operand 4 states. [2019-10-13 23:27:28,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:28,076 INFO L93 Difference]: Finished difference Result 8603 states and 11658 transitions. [2019-10-13 23:27:28,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:28,080 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2019-10-13 23:27:28,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:28,124 INFO L225 Difference]: With dead ends: 8603 [2019-10-13 23:27:28,125 INFO L226 Difference]: Without dead ends: 6371 [2019-10-13 23:27:28,149 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 [2019-10-13 23:27:28,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6371 states. [2019-10-13 23:27:28,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6371 to 6355. [2019-10-13 23:27:28,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6355 states. [2019-10-13 23:27:28,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6355 states to 6355 states and 8426 transitions. [2019-10-13 23:27:28,650 INFO L78 Accepts]: Start accepts. Automaton has 6355 states and 8426 transitions. Word has length 146 [2019-10-13 23:27:28,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:28,651 INFO L462 AbstractCegarLoop]: Abstraction has 6355 states and 8426 transitions. [2019-10-13 23:27:28,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 6355 states and 8426 transitions. [2019-10-13 23:27:28,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-13 23:27:28,672 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:28,673 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:28,674 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:28,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:28,674 INFO L82 PathProgramCache]: Analyzing trace with hash -654877300, now seen corresponding path program 1 times [2019-10-13 23:27:28,675 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:28,676 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834202158] [2019-10-13 23:27:28,677 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:28,677 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:28,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:28,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:28,823 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 23:27:28,824 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834202158] [2019-10-13 23:27:28,824 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:28,824 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 23:27:28,825 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340535762] [2019-10-13 23:27:28,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 23:27:28,825 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:28,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 23:27:28,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:27:28,827 INFO L87 Difference]: Start difference. First operand 6355 states and 8426 transitions. Second operand 8 states. [2019-10-13 23:27:30,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:30,394 INFO L93 Difference]: Finished difference Result 17513 states and 24077 transitions. [2019-10-13 23:27:30,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 23:27:30,395 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 148 [2019-10-13 23:27:30,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:30,488 INFO L225 Difference]: With dead ends: 17513 [2019-10-13 23:27:30,489 INFO L226 Difference]: Without dead ends: 11175 [2019-10-13 23:27:30,539 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-10-13 23:27:30,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11175 states. [2019-10-13 23:27:31,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11175 to 11024. [2019-10-13 23:27:31,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11024 states. [2019-10-13 23:27:31,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11024 states to 11024 states and 15154 transitions. [2019-10-13 23:27:31,483 INFO L78 Accepts]: Start accepts. Automaton has 11024 states and 15154 transitions. Word has length 148 [2019-10-13 23:27:31,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:31,485 INFO L462 AbstractCegarLoop]: Abstraction has 11024 states and 15154 transitions. [2019-10-13 23:27:31,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 23:27:31,485 INFO L276 IsEmpty]: Start isEmpty. Operand 11024 states and 15154 transitions. [2019-10-13 23:27:31,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-13 23:27:31,506 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:31,507 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:31,507 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:31,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:31,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1049664021, now seen corresponding path program 1 times [2019-10-13 23:27:31,508 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:31,508 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927241945] [2019-10-13 23:27:31,508 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:31,508 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:31,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:31,650 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 23:27:31,651 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927241945] [2019-10-13 23:27:31,651 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:31,651 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-13 23:27:31,651 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002182406] [2019-10-13 23:27:31,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 23:27:31,652 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:31,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 23:27:31,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:27:31,653 INFO L87 Difference]: Start difference. First operand 11024 states and 15154 transitions. Second operand 9 states. [2019-10-13 23:27:34,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:34,551 INFO L93 Difference]: Finished difference Result 34615 states and 49495 transitions. [2019-10-13 23:27:34,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 23:27:34,552 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 147 [2019-10-13 23:27:34,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:34,650 INFO L225 Difference]: With dead ends: 34615 [2019-10-13 23:27:34,650 INFO L226 Difference]: Without dead ends: 19246 [2019-10-13 23:27:34,750 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 [2019-10-13 23:27:34,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19246 states. [2019-10-13 23:27:35,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19246 to 17938. [2019-10-13 23:27:35,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17938 states. [2019-10-13 23:27:36,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17938 states to 17938 states and 24931 transitions. [2019-10-13 23:27:36,056 INFO L78 Accepts]: Start accepts. Automaton has 17938 states and 24931 transitions. Word has length 147 [2019-10-13 23:27:36,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:36,057 INFO L462 AbstractCegarLoop]: Abstraction has 17938 states and 24931 transitions. [2019-10-13 23:27:36,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 23:27:36,057 INFO L276 IsEmpty]: Start isEmpty. Operand 17938 states and 24931 transitions. [2019-10-13 23:27:36,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-13 23:27:36,077 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:36,077 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:36,077 INFO L410 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:36,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:36,078 INFO L82 PathProgramCache]: Analyzing trace with hash 432632579, now seen corresponding path program 1 times [2019-10-13 23:27:36,078 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:36,078 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699238190] [2019-10-13 23:27:36,078 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:36,079 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:36,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:36,171 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-13 23:27:36,171 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699238190] [2019-10-13 23:27:36,172 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228070044] [2019-10-13 23:27:36,172 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 [2019-10-13 23:27:36,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:36,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 23:27:36,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:36,397 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:27:36,397 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:36,554 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-13 23:27:36,554 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:27:36,555 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2019-10-13 23:27:36,555 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750732903] [2019-10-13 23:27:36,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:27:36,556 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:36,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:27:36,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:27:36,556 INFO L87 Difference]: Start difference. First operand 17938 states and 24931 transitions. Second operand 3 states. [2019-10-13 23:27:38,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:38,137 INFO L93 Difference]: Finished difference Result 34041 states and 49118 transitions. [2019-10-13 23:27:38,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:27:38,141 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2019-10-13 23:27:38,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:38,268 INFO L225 Difference]: With dead ends: 34041 [2019-10-13 23:27:38,268 INFO L226 Difference]: Without dead ends: 24031 [2019-10-13 23:27:38,368 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:27:38,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24031 states. [2019-10-13 23:27:40,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24031 to 21251. [2019-10-13 23:27:40,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21251 states. [2019-10-13 23:27:40,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21251 states to 21251 states and 29982 transitions. [2019-10-13 23:27:40,726 INFO L78 Accepts]: Start accepts. Automaton has 21251 states and 29982 transitions. Word has length 149 [2019-10-13 23:27:40,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:40,727 INFO L462 AbstractCegarLoop]: Abstraction has 21251 states and 29982 transitions. [2019-10-13 23:27:40,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:27:40,727 INFO L276 IsEmpty]: Start isEmpty. Operand 21251 states and 29982 transitions. [2019-10-13 23:27:40,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-13 23:27:40,772 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:40,772 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, 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] [2019-10-13 23:27:40,986 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:40,986 INFO L410 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:40,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:40,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1641123869, now seen corresponding path program 1 times [2019-10-13 23:27:40,987 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:40,988 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042206565] [2019-10-13 23:27:40,988 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:40,988 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:40,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:41,482 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-13 23:27:41,483 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042206565] [2019-10-13 23:27:41,483 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015472606] [2019-10-13 23:27:41,483 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 [2019-10-13 23:27:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:41,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-13 23:27:41,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:41,904 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 23:27:41,904 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:42,097 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:27:42,216 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:27:42,216 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:27:42,241 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:27:42,265 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-13 23:27:42,265 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:27:42,266 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [21, 8] total 34 [2019-10-13 23:27:42,266 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018604448] [2019-10-13 23:27:42,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 23:27:42,266 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:42,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 23:27:42,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 23:27:42,267 INFO L87 Difference]: Start difference. First operand 21251 states and 29982 transitions. Second operand 11 states. [2019-10-13 23:27:46,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:46,638 INFO L93 Difference]: Finished difference Result 79763 states and 138390 transitions. [2019-10-13 23:27:46,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 23:27:46,639 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 170 [2019-10-13 23:27:46,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:47,005 INFO L225 Difference]: With dead ends: 79763 [2019-10-13 23:27:47,005 INFO L226 Difference]: Without dead ends: 58529 [2019-10-13 23:27:47,302 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 332 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=295, Invalid=1961, Unknown=0, NotChecked=0, Total=2256 [2019-10-13 23:27:47,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58529 states.