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 0.1.24-36ac518-m [2019-10-07 17:16:03,480 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 17:16:03,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 17:16:03,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 17:16:03,500 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 17:16:03,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 17:16:03,504 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 17:16:03,506 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 17:16:03,508 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 17:16:03,508 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 17:16:03,509 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 17:16:03,510 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 17:16:03,511 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 17:16:03,512 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 17:16:03,513 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 17:16:03,514 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 17:16:03,515 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 17:16:03,516 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 17:16:03,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 17:16:03,519 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 17:16:03,521 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 17:16:03,523 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 17:16:03,526 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 17:16:03,527 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 17:16:03,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-07 17:16:03,531 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-07 17:16:03,532 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-07 17:16:03,534 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-07 17:16:03,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-07 17:16:03,536 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-07 17:16:03,536 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 17:16:03,537 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 17:16:03,540 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 17:16:03,541 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 17:16:03,542 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 17:16:03,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 17:16:03,545 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 17:16:03,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 17:16:03,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 17:16:03,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 17:16:03,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 17:16:03,548 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 [2019-10-07 17:16:03,570 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 17:16:03,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 17:16:03,572 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 17:16:03,572 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 17:16:03,572 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 17:16:03,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 17:16:03,573 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 17:16:03,573 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 17:16:03,573 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 17:16:03,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 17:16:03,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 17:16:03,575 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 17:16:03,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 17:16:03,575 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 17:16:03,575 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 17:16:03,576 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 17:16:03,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 17:16:03,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 17:16:03,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 17:16:03,576 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 17:16:03,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 17:16:03,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 17:16:03,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 17:16:03,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 17:16:03,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 17:16:03,578 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 17:16:03,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 17:16:03,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 17:16:03,578 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 [2019-10-07 17:16:03,876 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 17:16:03,893 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 17:16:03,897 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 17:16:03,898 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 17:16:03,899 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 17:16:03,899 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/transmitter.03.cil.c [2019-10-07 17:16:03,969 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27da67739/93ffca4cbe644684b8d66376c7cabc48/FLAGeb29bd068 [2019-10-07 17:16:04,466 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 17:16:04,468 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/transmitter.03.cil.c [2019-10-07 17:16:04,483 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27da67739/93ffca4cbe644684b8d66376c7cabc48/FLAGeb29bd068 [2019-10-07 17:16:04,826 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27da67739/93ffca4cbe644684b8d66376c7cabc48 [2019-10-07 17:16:04,835 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 17:16:04,837 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 17:16:04,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 17:16:04,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 17:16:04,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 17:16:04,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 05:16:04" (1/1) ... [2019-10-07 17:16:04,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d60e989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:04, skipping insertion in model container [2019-10-07 17:16:04,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 05:16:04" (1/1) ... [2019-10-07 17:16:04,860 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 17:16:04,914 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 17:16:05,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 17:16:05,137 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 17:16:05,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 17:16:05,300 INFO L192 MainTranslator]: Completed translation [2019-10-07 17:16:05,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:05 WrapperNode [2019-10-07 17:16:05,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 17:16:05,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 17:16:05,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 17:16:05,302 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 17:16:05,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:05" (1/1) ... [2019-10-07 17:16:05,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:05" (1/1) ... [2019-10-07 17:16:05,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:05" (1/1) ... [2019-10-07 17:16:05,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:05" (1/1) ... [2019-10-07 17:16:05,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:05" (1/1) ... [2019-10-07 17:16:05,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:05" (1/1) ... [2019-10-07 17:16:05,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:05" (1/1) ... [2019-10-07 17:16:05,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 17:16:05,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 17:16:05,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 17:16:05,350 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 17:16:05,351 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:05" (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 [2019-10-07 17:16:05,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 17:16:05,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 17:16:05,408 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-07 17:16:05,408 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-10-07 17:16:05,408 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-10-07 17:16:05,410 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2019-10-07 17:16:05,411 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2019-10-07 17:16:05,411 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-10-07 17:16:05,411 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-10-07 17:16:05,411 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2019-10-07 17:16:05,411 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2019-10-07 17:16:05,412 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-10-07 17:16:05,412 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-07 17:16:05,413 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-07 17:16:05,413 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-07 17:16:05,413 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-10-07 17:16:05,415 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-10-07 17:16:05,415 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-10-07 17:16:05,415 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-10-07 17:16:05,416 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-10-07 17:16:05,416 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-10-07 17:16:05,417 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-07 17:16:05,417 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-07 17:16:05,417 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-07 17:16:05,417 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 17:16:05,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 17:16:05,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 17:16:05,418 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-07 17:16:05,418 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-10-07 17:16:05,418 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-10-07 17:16:05,419 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2019-10-07 17:16:05,419 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2019-10-07 17:16:05,419 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-10-07 17:16:05,419 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-10-07 17:16:05,419 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-10-07 17:16:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2019-10-07 17:16:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2019-10-07 17:16:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-10-07 17:16:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-07 17:16:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-07 17:16:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-07 17:16:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-10-07 17:16:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-10-07 17:16:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-10-07 17:16:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-10-07 17:16:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-10-07 17:16:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-07 17:16:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-07 17:16:05,422 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-07 17:16:05,422 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 17:16:05,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 17:16:05,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 17:16:06,418 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 17:16:06,419 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-07 17:16:06,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 05:16:06 BoogieIcfgContainer [2019-10-07 17:16:06,420 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 17:16:06,421 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 17:16:06,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 17:16:06,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 17:16:06,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 05:16:04" (1/3) ... [2019-10-07 17:16:06,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71a6b2eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 05:16:06, skipping insertion in model container [2019-10-07 17:16:06,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:05" (2/3) ... [2019-10-07 17:16:06,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71a6b2eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 05:16:06, skipping insertion in model container [2019-10-07 17:16:06,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 05:16:06" (3/3) ... [2019-10-07 17:16:06,428 INFO L109 eAbstractionObserver]: Analyzing ICFG transmitter.03.cil.c [2019-10-07 17:16:06,437 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 17:16:06,445 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 17:16:06,456 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 17:16:06,482 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 17:16:06,482 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 17:16:06,483 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 17:16:06,483 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 17:16:06,483 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 17:16:06,483 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 17:16:06,484 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 17:16:06,484 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 17:16:06,505 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states. [2019-10-07 17:16:06,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-07 17:16:06,515 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:06,516 INFO L385 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] [2019-10-07 17:16:06,518 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:06,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:06,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1794568052, now seen corresponding path program 1 times [2019-10-07 17:16:06,536 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:06,537 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:06,537 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:06,538 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:06,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:06,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 17:16:06,862 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:06,862 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:16:06,863 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 17:16:06,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:16:06,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:16:06,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:16:06,883 INFO L87 Difference]: Start difference. First operand 140 states. Second operand 4 states. [2019-10-07 17:16:07,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:07,296 INFO L93 Difference]: Finished difference Result 379 states and 517 transitions. [2019-10-07 17:16:07,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:16:07,299 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2019-10-07 17:16:07,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:07,322 INFO L225 Difference]: With dead ends: 379 [2019-10-07 17:16:07,323 INFO L226 Difference]: Without dead ends: 243 [2019-10-07 17:16:07,335 INFO L606 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 [2019-10-07 17:16:07,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-10-07 17:16:07,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2019-10-07 17:16:07,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2019-10-07 17:16:07,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 301 transitions. [2019-10-07 17:16:07,443 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 301 transitions. Word has length 72 [2019-10-07 17:16:07,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:07,443 INFO L462 AbstractCegarLoop]: Abstraction has 239 states and 301 transitions. [2019-10-07 17:16:07,444 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:16:07,444 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 301 transitions. [2019-10-07 17:16:07,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-07 17:16:07,448 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:07,448 INFO L385 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] [2019-10-07 17:16:07,448 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:07,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:07,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1032195915, now seen corresponding path program 1 times [2019-10-07 17:16:07,449 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:07,449 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:07,449 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:07,450 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:07,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:07,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 17:16:07,612 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:07,612 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:16:07,613 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 17:16:07,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:16:07,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:16:07,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 17:16:07,619 INFO L87 Difference]: Start difference. First operand 239 states and 301 transitions. Second operand 3 states. [2019-10-07 17:16:07,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:07,725 INFO L93 Difference]: Finished difference Result 675 states and 904 transitions. [2019-10-07 17:16:07,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:16:07,730 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2019-10-07 17:16:07,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:07,742 INFO L225 Difference]: With dead ends: 675 [2019-10-07 17:16:07,742 INFO L226 Difference]: Without dead ends: 452 [2019-10-07 17:16:07,746 INFO L606 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 [2019-10-07 17:16:07,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2019-10-07 17:16:07,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 452. [2019-10-07 17:16:07,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 452 states. [2019-10-07 17:16:07,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 593 transitions. [2019-10-07 17:16:07,855 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 593 transitions. Word has length 72 [2019-10-07 17:16:07,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:07,857 INFO L462 AbstractCegarLoop]: Abstraction has 452 states and 593 transitions. [2019-10-07 17:16:07,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:16:07,857 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 593 transitions. [2019-10-07 17:16:07,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-07 17:16:07,863 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:07,863 INFO L385 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] [2019-10-07 17:16:07,863 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:07,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:07,864 INFO L82 PathProgramCache]: Analyzing trace with hash 364690172, now seen corresponding path program 1 times [2019-10-07 17:16:07,864 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:07,868 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:07,868 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:07,869 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:07,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-07 17:16:07,977 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:07,977 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:16:07,978 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 17:16:07,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:16:07,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:16:07,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:16:07,979 INFO L87 Difference]: Start difference. First operand 452 states and 593 transitions. Second operand 4 states. [2019-10-07 17:16:08,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:08,142 INFO L93 Difference]: Finished difference Result 1343 states and 1827 transitions. [2019-10-07 17:16:08,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:16:08,143 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2019-10-07 17:16:08,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:08,155 INFO L225 Difference]: With dead ends: 1343 [2019-10-07 17:16:08,155 INFO L226 Difference]: Without dead ends: 908 [2019-10-07 17:16:08,157 INFO L606 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 [2019-10-07 17:16:08,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2019-10-07 17:16:08,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 720. [2019-10-07 17:16:08,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 720 states. [2019-10-07 17:16:08,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 986 transitions. [2019-10-07 17:16:08,256 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 986 transitions. Word has length 87 [2019-10-07 17:16:08,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:08,257 INFO L462 AbstractCegarLoop]: Abstraction has 720 states and 986 transitions. [2019-10-07 17:16:08,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:16:08,257 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 986 transitions. [2019-10-07 17:16:08,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-07 17:16:08,262 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:08,262 INFO L385 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] [2019-10-07 17:16:08,263 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:08,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:08,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1578447092, now seen corresponding path program 1 times [2019-10-07 17:16:08,263 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:08,263 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:08,264 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:08,264 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:08,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:08,347 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-07 17:16:08,347 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:08,348 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:16:08,348 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 17:16:08,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:16:08,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:16:08,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 17:16:08,350 INFO L87 Difference]: Start difference. First operand 720 states and 986 transitions. Second operand 3 states. [2019-10-07 17:16:08,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:08,447 INFO L93 Difference]: Finished difference Result 1900 states and 2642 transitions. [2019-10-07 17:16:08,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:16:08,447 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 128 [2019-10-07 17:16:08,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:08,458 INFO L225 Difference]: With dead ends: 1900 [2019-10-07 17:16:08,458 INFO L226 Difference]: Without dead ends: 1197 [2019-10-07 17:16:08,486 INFO L606 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 [2019-10-07 17:16:08,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2019-10-07 17:16:08,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 940. [2019-10-07 17:16:08,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 940 states. [2019-10-07 17:16:08,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1308 transitions. [2019-10-07 17:16:08,558 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1308 transitions. Word has length 128 [2019-10-07 17:16:08,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:08,558 INFO L462 AbstractCegarLoop]: Abstraction has 940 states and 1308 transitions. [2019-10-07 17:16:08,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:16:08,559 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1308 transitions. [2019-10-07 17:16:08,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-07 17:16:08,562 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:08,562 INFO L385 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] [2019-10-07 17:16:08,563 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:08,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:08,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1812736208, now seen corresponding path program 1 times [2019-10-07 17:16:08,563 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:08,563 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:08,564 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:08,564 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:08,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:08,658 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-07 17:16:08,658 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:08,658 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:16:08,659 INFO L95 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 [2019-10-07 17:16:08,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:08,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 17:16:08,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:16:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-07 17:16:08,851 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:16:09,033 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-07 17:16:09,034 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 17:16:09,034 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5] total 6 [2019-10-07 17:16:09,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:16:09,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:16:09,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-07 17:16:09,035 INFO L87 Difference]: Start difference. First operand 940 states and 1308 transitions. Second operand 4 states. [2019-10-07 17:16:09,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:09,333 INFO L93 Difference]: Finished difference Result 2755 states and 4105 transitions. [2019-10-07 17:16:09,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:16:09,334 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2019-10-07 17:16:09,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:09,347 INFO L225 Difference]: With dead ends: 2755 [2019-10-07 17:16:09,347 INFO L226 Difference]: Without dead ends: 1831 [2019-10-07 17:16:09,354 INFO L606 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 [2019-10-07 17:16:09,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2019-10-07 17:16:09,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1802. [2019-10-07 17:16:09,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1802 states. [2019-10-07 17:16:09,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 2480 transitions. [2019-10-07 17:16:09,495 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 2480 transitions. Word has length 129 [2019-10-07 17:16:09,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:09,496 INFO L462 AbstractCegarLoop]: Abstraction has 1802 states and 2480 transitions. [2019-10-07 17:16:09,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:16:09,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 2480 transitions. [2019-10-07 17:16:09,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-07 17:16:09,502 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:09,502 INFO L385 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] [2019-10-07 17:16:09,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:16:09,766 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:09,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:09,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1388662650, now seen corresponding path program 1 times [2019-10-07 17:16:09,767 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:09,767 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:09,767 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:09,768 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:09,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-07 17:16:09,847 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:09,847 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:16:09,847 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 17:16:09,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:16:09,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:16:09,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 17:16:09,849 INFO L87 Difference]: Start difference. First operand 1802 states and 2480 transitions. Second operand 3 states. [2019-10-07 17:16:10,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:10,016 INFO L93 Difference]: Finished difference Result 4711 states and 6541 transitions. [2019-10-07 17:16:10,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:16:10,017 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 129 [2019-10-07 17:16:10,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:10,038 INFO L225 Difference]: With dead ends: 4711 [2019-10-07 17:16:10,038 INFO L226 Difference]: Without dead ends: 2926 [2019-10-07 17:16:10,054 INFO L606 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 [2019-10-07 17:16:10,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2019-10-07 17:16:10,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2520. [2019-10-07 17:16:10,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2520 states. [2019-10-07 17:16:10,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 3435 transitions. [2019-10-07 17:16:10,254 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 3435 transitions. Word has length 129 [2019-10-07 17:16:10,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:10,255 INFO L462 AbstractCegarLoop]: Abstraction has 2520 states and 3435 transitions. [2019-10-07 17:16:10,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:16:10,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 3435 transitions. [2019-10-07 17:16:10,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-07 17:16:10,263 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:10,264 INFO L385 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] [2019-10-07 17:16:10,264 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:10,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:10,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1272031359, now seen corresponding path program 1 times [2019-10-07 17:16:10,265 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:10,266 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:10,266 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:10,266 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:10,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:10,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-07 17:16:10,480 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:10,480 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:16:10,480 INFO L95 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 [2019-10-07 17:16:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:10,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 17:16:10,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:16:10,748 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-07 17:16:10,748 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:16:10,920 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-07 17:16:10,921 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 17:16:10,921 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5] total 6 [2019-10-07 17:16:10,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:16:10,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:16:10,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-07 17:16:10,923 INFO L87 Difference]: Start difference. First operand 2520 states and 3435 transitions. Second operand 4 states. [2019-10-07 17:16:11,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:11,421 INFO L93 Difference]: Finished difference Result 7416 states and 10613 transitions. [2019-10-07 17:16:11,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:16:11,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2019-10-07 17:16:11,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:11,458 INFO L225 Difference]: With dead ends: 7416 [2019-10-07 17:16:11,459 INFO L226 Difference]: Without dead ends: 4912 [2019-10-07 17:16:11,491 INFO L606 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 [2019-10-07 17:16:11,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4912 states. [2019-10-07 17:16:11,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4912 to 4799. [2019-10-07 17:16:11,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4799 states. [2019-10-07 17:16:11,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4799 states to 4799 states and 6393 transitions. [2019-10-07 17:16:11,793 INFO L78 Accepts]: Start accepts. Automaton has 4799 states and 6393 transitions. Word has length 130 [2019-10-07 17:16:11,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:11,794 INFO L462 AbstractCegarLoop]: Abstraction has 4799 states and 6393 transitions. [2019-10-07 17:16:11,794 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:16:11,794 INFO L276 IsEmpty]: Start isEmpty. Operand 4799 states and 6393 transitions. [2019-10-07 17:16:11,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-07 17:16:11,802 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:11,802 INFO L385 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] [2019-10-07 17:16:12,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:16:12,008 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:12,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:12,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1430687984, now seen corresponding path program 1 times [2019-10-07 17:16:12,009 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:12,009 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:12,009 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:12,009 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:12,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-07 17:16:12,114 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:12,114 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:16:12,114 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 17:16:12,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:16:12,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:16:12,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 17:16:12,116 INFO L87 Difference]: Start difference. First operand 4799 states and 6393 transitions. Second operand 3 states. [2019-10-07 17:16:12,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:12,516 INFO L93 Difference]: Finished difference Result 12672 states and 17268 transitions. [2019-10-07 17:16:12,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:16:12,517 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 129 [2019-10-07 17:16:12,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:12,579 INFO L225 Difference]: With dead ends: 12672 [2019-10-07 17:16:12,580 INFO L226 Difference]: Without dead ends: 7890 [2019-10-07 17:16:12,623 INFO L606 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 [2019-10-07 17:16:12,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7890 states. [2019-10-07 17:16:13,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7890 to 7289. [2019-10-07 17:16:13,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7289 states. [2019-10-07 17:16:13,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7289 states to 7289 states and 9700 transitions. [2019-10-07 17:16:13,129 INFO L78 Accepts]: Start accepts. Automaton has 7289 states and 9700 transitions. Word has length 129 [2019-10-07 17:16:13,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:13,130 INFO L462 AbstractCegarLoop]: Abstraction has 7289 states and 9700 transitions. [2019-10-07 17:16:13,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:16:13,130 INFO L276 IsEmpty]: Start isEmpty. Operand 7289 states and 9700 transitions. [2019-10-07 17:16:13,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-07 17:16:13,138 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:13,138 INFO L385 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] [2019-10-07 17:16:13,138 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:13,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:13,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1613504212, now seen corresponding path program 1 times [2019-10-07 17:16:13,139 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:13,139 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:13,139 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:13,142 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:13,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:13,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:13,217 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-07 17:16:13,217 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:13,217 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:16:13,217 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 17:16:13,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:16:13,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:16:13,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:16:13,218 INFO L87 Difference]: Start difference. First operand 7289 states and 9700 transitions. Second operand 4 states. [2019-10-07 17:16:13,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:13,869 INFO L93 Difference]: Finished difference Result 15665 states and 20839 transitions. [2019-10-07 17:16:13,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:16:13,870 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2019-10-07 17:16:13,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:13,932 INFO L225 Difference]: With dead ends: 15665 [2019-10-07 17:16:13,932 INFO L226 Difference]: Without dead ends: 8393 [2019-10-07 17:16:13,975 INFO L606 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 [2019-10-07 17:16:13,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8393 states. [2019-10-07 17:16:14,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8393 to 8377. [2019-10-07 17:16:14,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8377 states. [2019-10-07 17:16:14,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8377 states to 8377 states and 10906 transitions. [2019-10-07 17:16:14,390 INFO L78 Accepts]: Start accepts. Automaton has 8377 states and 10906 transitions. Word has length 130 [2019-10-07 17:16:14,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:14,391 INFO L462 AbstractCegarLoop]: Abstraction has 8377 states and 10906 transitions. [2019-10-07 17:16:14,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:16:14,391 INFO L276 IsEmpty]: Start isEmpty. Operand 8377 states and 10906 transitions. [2019-10-07 17:16:14,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-07 17:16:14,400 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:14,400 INFO L385 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] [2019-10-07 17:16:14,401 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:14,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:14,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1495307938, now seen corresponding path program 1 times [2019-10-07 17:16:14,401 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:14,401 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:14,402 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:14,402 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:14,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-07 17:16:14,727 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:14,727 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:16:14,727 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-07 17:16:14,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-07 17:16:14,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-07 17:16:14,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-07 17:16:14,730 INFO L87 Difference]: Start difference. First operand 8377 states and 10906 transitions. Second operand 9 states. [2019-10-07 17:16:16,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:16,675 INFO L93 Difference]: Finished difference Result 25960 states and 35023 transitions. [2019-10-07 17:16:16,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-07 17:16:16,676 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2019-10-07 17:16:16,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:16,763 INFO L225 Difference]: With dead ends: 25960 [2019-10-07 17:16:16,763 INFO L226 Difference]: Without dead ends: 12115 [2019-10-07 17:16:16,829 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2019-10-07 17:16:16,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12115 states. [2019-10-07 17:16:17,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12115 to 10947. [2019-10-07 17:16:17,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10947 states. [2019-10-07 17:16:17,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10947 states to 10947 states and 14399 transitions. [2019-10-07 17:16:17,570 INFO L78 Accepts]: Start accepts. Automaton has 10947 states and 14399 transitions. Word has length 131 [2019-10-07 17:16:17,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:17,570 INFO L462 AbstractCegarLoop]: Abstraction has 10947 states and 14399 transitions. [2019-10-07 17:16:17,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-07 17:16:17,571 INFO L276 IsEmpty]: Start isEmpty. Operand 10947 states and 14399 transitions. [2019-10-07 17:16:17,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-07 17:16:17,582 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:17,582 INFO L385 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] [2019-10-07 17:16:17,582 INFO L410 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:17,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:17,583 INFO L82 PathProgramCache]: Analyzing trace with hash 519823223, now seen corresponding path program 1 times [2019-10-07 17:16:17,583 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:17,583 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:17,583 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:17,583 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:17,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-10-07 17:16:17,980 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:17,980 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:16:17,980 INFO L95 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 [2019-10-07 17:16:18,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:18,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-07 17:16:18,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:16:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 17:16:18,397 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:16:18,600 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:16:18,716 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:16:18,720 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:16:18,747 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:16:18,783 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-07 17:16:18,784 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:16:18,784 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [20, 8] total 33 [2019-10-07 17:16:18,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-07 17:16:18,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-07 17:16:18,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2019-10-07 17:16:18,786 INFO L87 Difference]: Start difference. First operand 10947 states and 14399 transitions. Second operand 11 states. [2019-10-07 17:16:22,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:22,087 INFO L93 Difference]: Finished difference Result 28771 states and 40434 transitions. [2019-10-07 17:16:22,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-07 17:16:22,088 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 154 [2019-10-07 17:16:22,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:22,194 INFO L225 Difference]: With dead ends: 28771 [2019-10-07 17:16:22,195 INFO L226 Difference]: Without dead ends: 17841 [2019-10-07 17:16:22,295 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 300 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=285, Invalid=1877, Unknown=0, NotChecked=0, Total=2162 [2019-10-07 17:16:22,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17841 states. [2019-10-07 17:16:24,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17841 to 16762. [2019-10-07 17:16:24,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16762 states. [2019-10-07 17:16:24,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16762 states to 16762 states and 22832 transitions. [2019-10-07 17:16:24,118 INFO L78 Accepts]: Start accepts. Automaton has 16762 states and 22832 transitions. Word has length 154 [2019-10-07 17:16:24,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:24,119 INFO L462 AbstractCegarLoop]: Abstraction has 16762 states and 22832 transitions. [2019-10-07 17:16:24,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-07 17:16:24,119 INFO L276 IsEmpty]: Start isEmpty. Operand 16762 states and 22832 transitions. [2019-10-07 17:16:24,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-07 17:16:24,131 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:24,131 INFO L385 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] [2019-10-07 17:16:24,335 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:16:24,335 INFO L410 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:24,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:24,336 INFO L82 PathProgramCache]: Analyzing trace with hash 743000243, now seen corresponding path program 1 times [2019-10-07 17:16:24,336 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:24,336 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:24,337 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:24,337 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:24,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:24,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-07 17:16:24,496 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:24,496 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:16:24,496 INFO L95 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 [2019-10-07 17:16:24,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:24,694 INFO L256 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-07 17:16:24,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:16:24,835 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 17:16:24,835 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:16:25,128 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2019-10-07 17:16:25,408 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2019-10-07 17:16:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-07 17:16:25,542 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:16:25,542 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 6] total 18 [2019-10-07 17:16:25,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 17:16:25,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 17:16:25,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2019-10-07 17:16:25,547 INFO L87 Difference]: Start difference. First operand 16762 states and 22832 transitions. Second operand 6 states. [2019-10-07 17:16:26,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:26,596 INFO L93 Difference]: Finished difference Result 30604 states and 42010 transitions. [2019-10-07 17:16:26,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-07 17:16:26,597 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 156 [2019-10-07 17:16:26,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:26,666 INFO L225 Difference]: With dead ends: 30604 [2019-10-07 17:16:26,667 INFO L226 Difference]: Without dead ends: 13859 [2019-10-07 17:16:26,725 INFO L606 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 [2019-10-07 17:16:26,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13859 states. [2019-10-07 17:16:27,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13859 to 11119. [2019-10-07 17:16:27,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11119 states. [2019-10-07 17:16:27,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11119 states to 11119 states and 14519 transitions. [2019-10-07 17:16:27,414 INFO L78 Accepts]: Start accepts. Automaton has 11119 states and 14519 transitions. Word has length 156 [2019-10-07 17:16:27,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:27,414 INFO L462 AbstractCegarLoop]: Abstraction has 11119 states and 14519 transitions. [2019-10-07 17:16:27,414 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 17:16:27,414 INFO L276 IsEmpty]: Start isEmpty. Operand 11119 states and 14519 transitions. [2019-10-07 17:16:27,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-07 17:16:27,426 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:27,426 INFO L385 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] [2019-10-07 17:16:27,631 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:16:27,631 INFO L410 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:27,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:27,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1896392692, now seen corresponding path program 1 times [2019-10-07 17:16:27,632 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:27,632 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:27,632 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:27,632 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:27,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-07 17:16:27,807 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:27,807 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:16:27,807 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-07 17:16:27,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-07 17:16:27,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-07 17:16:27,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-07 17:16:27,808 INFO L87 Difference]: Start difference. First operand 11119 states and 14519 transitions. Second operand 8 states. [2019-10-07 17:16:28,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:28,974 INFO L93 Difference]: Finished difference Result 20251 states and 27372 transitions. [2019-10-07 17:16:28,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 17:16:28,975 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 177 [2019-10-07 17:16:28,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:29,031 INFO L225 Difference]: With dead ends: 20251 [2019-10-07 17:16:29,031 INFO L226 Difference]: Without dead ends: 10022 [2019-10-07 17:16:29,088 INFO L606 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 [2019-10-07 17:16:29,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10022 states. [2019-10-07 17:16:29,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10022 to 9464. [2019-10-07 17:16:29,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9464 states. [2019-10-07 17:16:29,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9464 states to 9464 states and 11917 transitions. [2019-10-07 17:16:29,646 INFO L78 Accepts]: Start accepts. Automaton has 9464 states and 11917 transitions. Word has length 177 [2019-10-07 17:16:29,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:29,646 INFO L462 AbstractCegarLoop]: Abstraction has 9464 states and 11917 transitions. [2019-10-07 17:16:29,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-07 17:16:29,646 INFO L276 IsEmpty]: Start isEmpty. Operand 9464 states and 11917 transitions. [2019-10-07 17:16:29,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-07 17:16:29,654 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:29,655 INFO L385 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] [2019-10-07 17:16:29,655 INFO L410 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:29,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:29,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1288906095, now seen corresponding path program 1 times [2019-10-07 17:16:29,655 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:29,656 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:29,656 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:29,656 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:29,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:29,766 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-10-07 17:16:29,766 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:29,766 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:16:29,766 INFO L95 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 [2019-10-07 17:16:29,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:29,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-07 17:16:29,944 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:16:30,036 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-10-07 17:16:30,036 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:16:30,210 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:16:30,299 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:16:30,300 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:16:30,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:16:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-07 17:16:30,874 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:16:30,874 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 7] total 14 [2019-10-07 17:16:30,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-07 17:16:30,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-07 17:16:30,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-10-07 17:16:30,877 INFO L87 Difference]: Start difference. First operand 9464 states and 11917 transitions. Second operand 9 states. [2019-10-07 17:16:32,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:32,217 INFO L93 Difference]: Finished difference Result 21188 states and 28557 transitions. [2019-10-07 17:16:32,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-07 17:16:32,217 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 178 [2019-10-07 17:16:32,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:32,275 INFO L225 Difference]: With dead ends: 21188 [2019-10-07 17:16:32,276 INFO L226 Difference]: Without dead ends: 12276 [2019-10-07 17:16:32,314 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2019-10-07 17:16:32,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12276 states. [2019-10-07 17:16:32,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12276 to 11556. [2019-10-07 17:16:32,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11556 states. [2019-10-07 17:16:33,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11556 states to 11556 states and 15078 transitions. [2019-10-07 17:16:33,013 INFO L78 Accepts]: Start accepts. Automaton has 11556 states and 15078 transitions. Word has length 178 [2019-10-07 17:16:33,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:33,013 INFO L462 AbstractCegarLoop]: Abstraction has 11556 states and 15078 transitions. [2019-10-07 17:16:33,014 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-07 17:16:33,014 INFO L276 IsEmpty]: Start isEmpty. Operand 11556 states and 15078 transitions. [2019-10-07 17:16:33,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-07 17:16:33,022 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:33,023 INFO L385 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] [2019-10-07 17:16:33,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:16:33,231 INFO L410 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:33,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:33,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1622875971, now seen corresponding path program 1 times [2019-10-07 17:16:33,231 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:33,231 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:33,231 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:33,232 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:33,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:33,311 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-10-07 17:16:33,312 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:33,312 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:16:33,312 INFO L95 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 [2019-10-07 17:16:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:33,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 45 conjunts are in the unsatisfiable core [2019-10-07 17:16:33,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:16:33,713 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 71 proven. 18 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-07 17:16:33,714 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:16:34,167 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-10-07 17:16:34,167 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 17:16:34,223 INFO L162 IcfgInterpreter]: Started Sifa with 99 locations of interest [2019-10-07 17:16:34,223 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 17:16:34,229 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 17:16:34,239 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 17:16:34,239 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 17:16:34,522 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 58 for LOIs [2019-10-07 17:16:34,564 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 99 for LOIs [2019-10-07 17:16:35,033 INFO L199 IcfgInterpreter]: Interpreting procedure init_model with input of size 63 for LOIs [2019-10-07 17:16:35,101 INFO L199 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 106 for LOIs [2019-10-07 17:16:36,595 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-10-07 17:16:36,617 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-10-07 17:16:37,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:16:37,056 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:133) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε at de.uni_freiburg.informatik.ultimate.lib.sifa.PriorityWorklist.add(PriorityWorklist.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.lambda$2(DagInterpreter.java:135) at java.lang.Iterable.forEach(Iterable.java:75) at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:135) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:287) ... 21 more [2019-10-07 17:16:37,064 INFO L168 Benchmark]: Toolchain (without parser) took 32226.52 ms. Allocated memory was 147.8 MB in the beginning and 1.4 GB in the end (delta: 1.3 GB). Free memory was 104.4 MB in the beginning and 834.2 MB in the end (delta: -729.8 MB). Peak memory consumption was 527.0 MB. Max. memory is 7.1 GB. [2019-10-07 17:16:37,065 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 147.8 MB. Free memory was 123.0 MB in the beginning and 122.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 17:16:37,066 INFO L168 Benchmark]: CACSL2BoogieTranslator took 461.01 ms. Allocated memory was 147.8 MB in the beginning and 203.4 MB in the end (delta: 55.6 MB). Free memory was 104.2 MB in the beginning and 178.8 MB in the end (delta: -74.6 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. [2019-10-07 17:16:37,066 INFO L168 Benchmark]: Boogie Preprocessor took 47.84 ms. Allocated memory is still 203.4 MB. Free memory was 178.8 MB in the beginning and 176.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2019-10-07 17:16:37,067 INFO L168 Benchmark]: RCFGBuilder took 1070.36 ms. Allocated memory was 203.4 MB in the beginning and 231.7 MB in the end (delta: 28.3 MB). Free memory was 176.2 MB in the beginning and 201.1 MB in the end (delta: -24.9 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2019-10-07 17:16:37,068 INFO L168 Benchmark]: TraceAbstraction took 30640.66 ms. Allocated memory was 231.7 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 201.1 MB in the beginning and 834.2 MB in the end (delta: -633.1 MB). Peak memory consumption was 539.7 MB. Max. memory is 7.1 GB. [2019-10-07 17:16:37,072 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 147.8 MB. Free memory was 123.0 MB in the beginning and 122.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 461.01 ms. Allocated memory was 147.8 MB in the beginning and 203.4 MB in the end (delta: 55.6 MB). Free memory was 104.2 MB in the beginning and 178.8 MB in the end (delta: -74.6 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 47.84 ms. Allocated memory is still 203.4 MB. Free memory was 178.8 MB in the beginning and 176.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1070.36 ms. Allocated memory was 203.4 MB in the beginning and 231.7 MB in the end (delta: 28.3 MB). Free memory was 176.2 MB in the beginning and 201.1 MB in the end (delta: -24.9 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 30640.66 ms. Allocated memory was 231.7 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 201.1 MB in the beginning and 834.2 MB in the end (delta: -633.1 MB). Peak memory consumption was 539.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...