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.05.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 17:16:20,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 17:16:20,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 17:16:20,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 17:16:20,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 17:16:20,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 17:16:20,500 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 17:16:20,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 17:16:20,515 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 17:16:20,518 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 17:16:20,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 17:16:20,521 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 17:16:20,521 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 17:16:20,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 17:16:20,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 17:16:20,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 17:16:20,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 17:16:20,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 17:16:20,530 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 17:16:20,535 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 17:16:20,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 17:16:20,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 17:16:20,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 17:16:20,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 17:16:20,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-07 17:16:20,547 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-07 17:16:20,547 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-07 17:16:20,549 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-07 17:16:20,550 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-07 17:16:20,551 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-07 17:16:20,551 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 17:16:20,553 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 17:16:20,554 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 17:16:20,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 17:16:20,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 17:16:20,556 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 17:16:20,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 17:16:20,557 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 17:16:20,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 17:16:20,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 17:16:20,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 17:16:20,560 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 17:16:20,592 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 17:16:20,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 17:16:20,599 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 17:16:20,599 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 17:16:20,599 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 17:16:20,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 17:16:20,600 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 17:16:20,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 17:16:20,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 17:16:20,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 17:16:20,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 17:16:20,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 17:16:20,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 17:16:20,601 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 17:16:20,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 17:16:20,601 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 17:16:20,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 17:16:20,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 17:16:20,602 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 17:16:20,602 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 17:16:20,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 17:16:20,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 17:16:20,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 17:16:20,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 17:16:20,604 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 17:16:20,604 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 17:16:20,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 17:16:20,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 17:16:20,605 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 17:16:20,902 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 17:16:20,914 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 17:16:20,918 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 17:16:20,919 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 17:16:20,920 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 17:16:20,920 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/transmitter.05.cil.c [2019-10-07 17:16:20,994 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7981904d8/215799c1eb744959b2949f35e431b9c6/FLAG09c57e975 [2019-10-07 17:16:21,463 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 17:16:21,463 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/transmitter.05.cil.c [2019-10-07 17:16:21,476 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7981904d8/215799c1eb744959b2949f35e431b9c6/FLAG09c57e975 [2019-10-07 17:16:21,835 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7981904d8/215799c1eb744959b2949f35e431b9c6 [2019-10-07 17:16:21,845 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 17:16:21,847 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 17:16:21,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 17:16:21,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 17:16:21,855 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 17:16:21,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 05:16:21" (1/1) ... [2019-10-07 17:16:21,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a3d015c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:21, skipping insertion in model container [2019-10-07 17:16:21,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 05:16:21" (1/1) ... [2019-10-07 17:16:21,867 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 17:16:21,923 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 17:16:22,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 17:16:22,244 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 17:16:22,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 17:16:22,418 INFO L192 MainTranslator]: Completed translation [2019-10-07 17:16:22,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:22 WrapperNode [2019-10-07 17:16:22,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 17:16:22,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 17:16:22,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 17:16:22,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 17:16:22,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:22" (1/1) ... [2019-10-07 17:16:22,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:22" (1/1) ... [2019-10-07 17:16:22,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:22" (1/1) ... [2019-10-07 17:16:22,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:22" (1/1) ... [2019-10-07 17:16:22,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:22" (1/1) ... [2019-10-07 17:16:22,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:22" (1/1) ... [2019-10-07 17:16:22,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:22" (1/1) ... [2019-10-07 17:16:22,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 17:16:22,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 17:16:22,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 17:16:22,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 17:16:22,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:22" (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 17:16:22,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 17:16:22,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 17:16:22,567 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-07 17:16:22,567 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-10-07 17:16:22,568 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-10-07 17:16:22,568 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2019-10-07 17:16:22,568 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2019-10-07 17:16:22,568 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2019-10-07 17:16:22,568 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2019-10-07 17:16:22,568 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-10-07 17:16:22,569 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-10-07 17:16:22,569 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2019-10-07 17:16:22,569 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2019-10-07 17:16:22,569 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2019-10-07 17:16:22,569 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2019-10-07 17:16:22,569 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-10-07 17:16:22,570 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-07 17:16:22,570 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-07 17:16:22,570 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-07 17:16:22,570 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-10-07 17:16:22,570 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-10-07 17:16:22,570 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-10-07 17:16:22,571 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-10-07 17:16:22,571 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-10-07 17:16:22,571 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-10-07 17:16:22,571 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-07 17:16:22,571 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-07 17:16:22,571 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-07 17:16:22,572 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 17:16:22,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 17:16:22,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 17:16:22,572 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-07 17:16:22,572 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-10-07 17:16:22,572 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-10-07 17:16:22,573 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2019-10-07 17:16:22,573 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2019-10-07 17:16:22,573 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2019-10-07 17:16:22,573 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2019-10-07 17:16:22,573 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-10-07 17:16:22,573 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-10-07 17:16:22,574 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-10-07 17:16:22,574 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2019-10-07 17:16:22,574 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2019-10-07 17:16:22,574 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2019-10-07 17:16:22,574 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2019-10-07 17:16:22,574 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-10-07 17:16:22,575 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-07 17:16:22,575 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-07 17:16:22,575 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-07 17:16:22,575 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-10-07 17:16:22,575 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-10-07 17:16:22,575 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-10-07 17:16:22,575 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-10-07 17:16:22,576 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-10-07 17:16:22,576 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-07 17:16:22,576 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-07 17:16:22,576 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-07 17:16:22,576 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 17:16:22,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 17:16:22,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 17:16:23,914 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 17:16:23,914 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-07 17:16:23,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 05:16:23 BoogieIcfgContainer [2019-10-07 17:16:23,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 17:16:23,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 17:16:23,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 17:16:23,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 17:16:23,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 05:16:21" (1/3) ... [2019-10-07 17:16:23,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f2e897c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 05:16:23, skipping insertion in model container [2019-10-07 17:16:23,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:22" (2/3) ... [2019-10-07 17:16:23,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f2e897c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 05:16:23, skipping insertion in model container [2019-10-07 17:16:23,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 05:16:23" (3/3) ... [2019-10-07 17:16:23,939 INFO L109 eAbstractionObserver]: Analyzing ICFG transmitter.05.cil.c [2019-10-07 17:16:23,950 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 17:16:23,959 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 17:16:23,971 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 17:16:24,009 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 17:16:24,009 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 17:16:24,009 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 17:16:24,010 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 17:16:24,010 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 17:16:24,011 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 17:16:24,011 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 17:16:24,011 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 17:16:24,044 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states. [2019-10-07 17:16:24,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-07 17:16:24,062 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:24,063 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:16:24,065 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:24,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:24,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1812036435, now seen corresponding path program 1 times [2019-10-07 17:16:24,082 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:24,082 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:24,083 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:24,083 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:24,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:24,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:24,492 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 17:16:24,493 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:24,493 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:16:24,494 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 17:16:24,498 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:16:24,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:16:24,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:16:24,516 INFO L87 Difference]: Start difference. First operand 174 states. Second operand 4 states. [2019-10-07 17:16:25,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:25,029 INFO L93 Difference]: Finished difference Result 481 states and 669 transitions. [2019-10-07 17:16:25,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:16:25,031 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2019-10-07 17:16:25,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:25,057 INFO L225 Difference]: With dead ends: 481 [2019-10-07 17:16:25,057 INFO L226 Difference]: Without dead ends: 311 [2019-10-07 17:16:25,063 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 17:16:25,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2019-10-07 17:16:25,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 307. [2019-10-07 17:16:25,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2019-10-07 17:16:25,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 397 transitions. [2019-10-07 17:16:25,189 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 397 transitions. Word has length 88 [2019-10-07 17:16:25,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:25,190 INFO L462 AbstractCegarLoop]: Abstraction has 307 states and 397 transitions. [2019-10-07 17:16:25,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:16:25,191 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 397 transitions. [2019-10-07 17:16:25,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-07 17:16:25,205 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:25,206 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:16:25,209 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:25,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:25,209 INFO L82 PathProgramCache]: Analyzing trace with hash -2105288044, now seen corresponding path program 1 times [2019-10-07 17:16:25,210 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:25,210 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:25,210 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:25,210 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:25,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:25,408 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 17:16:25,409 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:25,409 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:16:25,410 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 17:16:25,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:16:25,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:16:25,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:16:25,415 INFO L87 Difference]: Start difference. First operand 307 states and 397 transitions. Second operand 4 states. [2019-10-07 17:16:25,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:25,782 INFO L93 Difference]: Finished difference Result 880 states and 1201 transitions. [2019-10-07 17:16:25,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:16:25,785 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2019-10-07 17:16:25,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:25,797 INFO L225 Difference]: With dead ends: 880 [2019-10-07 17:16:25,798 INFO L226 Difference]: Without dead ends: 589 [2019-10-07 17:16:25,802 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 17:16:25,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2019-10-07 17:16:25,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 584. [2019-10-07 17:16:25,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-10-07 17:16:25,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 752 transitions. [2019-10-07 17:16:25,894 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 752 transitions. Word has length 88 [2019-10-07 17:16:25,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:25,896 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 752 transitions. [2019-10-07 17:16:25,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:16:25,896 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 752 transitions. [2019-10-07 17:16:25,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-07 17:16:25,902 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:25,903 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:16:25,903 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:25,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:25,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1048031859, now seen corresponding path program 1 times [2019-10-07 17:16:25,904 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:25,904 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:25,905 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:25,905 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:25,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:26,082 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 17:16:26,082 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:26,083 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:16:26,083 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 17:16:26,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:16:26,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:16:26,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:16:26,084 INFO L87 Difference]: Start difference. First operand 584 states and 752 transitions. Second operand 4 states. [2019-10-07 17:16:26,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:26,413 INFO L93 Difference]: Finished difference Result 1703 states and 2316 transitions. [2019-10-07 17:16:26,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:16:26,416 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2019-10-07 17:16:26,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:26,429 INFO L225 Difference]: With dead ends: 1703 [2019-10-07 17:16:26,429 INFO L226 Difference]: Without dead ends: 1135 [2019-10-07 17:16:26,433 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:16:26,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2019-10-07 17:16:26,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 1128. [2019-10-07 17:16:26,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1128 states. [2019-10-07 17:16:26,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1446 transitions. [2019-10-07 17:16:26,536 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1446 transitions. Word has length 88 [2019-10-07 17:16:26,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:26,537 INFO L462 AbstractCegarLoop]: Abstraction has 1128 states and 1446 transitions. [2019-10-07 17:16:26,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:16:26,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1446 transitions. [2019-10-07 17:16:26,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-07 17:16:26,540 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:26,540 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:16:26,540 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:26,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:26,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1052809356, now seen corresponding path program 1 times [2019-10-07 17:16:26,541 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:26,542 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:26,542 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:26,542 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:26,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:26,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:26,634 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 17:16:26,634 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:26,634 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:16:26,635 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 17:16:26,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:16:26,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:16:26,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:16:26,636 INFO L87 Difference]: Start difference. First operand 1128 states and 1446 transitions. Second operand 4 states. [2019-10-07 17:16:27,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:27,027 INFO L93 Difference]: Finished difference Result 3319 states and 4508 transitions. [2019-10-07 17:16:27,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:16:27,028 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2019-10-07 17:16:27,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:27,043 INFO L225 Difference]: With dead ends: 3319 [2019-10-07 17:16:27,043 INFO L226 Difference]: Without dead ends: 2207 [2019-10-07 17:16:27,051 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 17:16:27,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2019-10-07 17:16:27,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 2196. [2019-10-07 17:16:27,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2196 states. [2019-10-07 17:16:27,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 2808 transitions. [2019-10-07 17:16:27,183 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 2808 transitions. Word has length 88 [2019-10-07 17:16:27,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:27,184 INFO L462 AbstractCegarLoop]: Abstraction has 2196 states and 2808 transitions. [2019-10-07 17:16:27,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:16:27,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 2808 transitions. [2019-10-07 17:16:27,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-07 17:16:27,185 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:27,186 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:16:27,186 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:27,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:27,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1967055251, now seen corresponding path program 1 times [2019-10-07 17:16:27,187 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:27,187 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:27,187 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:27,187 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:27,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:27,274 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 17:16:27,275 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:27,275 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:16:27,275 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 17:16:27,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:16:27,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:16:27,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 17:16:27,277 INFO L87 Difference]: Start difference. First operand 2196 states and 2808 transitions. Second operand 3 states. [2019-10-07 17:16:27,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:27,567 INFO L93 Difference]: Finished difference Result 6504 states and 8979 transitions. [2019-10-07 17:16:27,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:16:27,567 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2019-10-07 17:16:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:27,595 INFO L225 Difference]: With dead ends: 6504 [2019-10-07 17:16:27,596 INFO L226 Difference]: Without dead ends: 4324 [2019-10-07 17:16:27,610 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 17:16:27,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2019-10-07 17:16:27,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 4324. [2019-10-07 17:16:27,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4324 states. [2019-10-07 17:16:27,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4324 states to 4324 states and 5835 transitions. [2019-10-07 17:16:27,916 INFO L78 Accepts]: Start accepts. Automaton has 4324 states and 5835 transitions. Word has length 88 [2019-10-07 17:16:27,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:27,917 INFO L462 AbstractCegarLoop]: Abstraction has 4324 states and 5835 transitions. [2019-10-07 17:16:27,917 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:16:27,917 INFO L276 IsEmpty]: Start isEmpty. Operand 4324 states and 5835 transitions. [2019-10-07 17:16:27,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-07 17:16:27,922 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:27,923 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:16:27,923 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:27,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:27,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1325517121, now seen corresponding path program 1 times [2019-10-07 17:16:27,924 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:27,924 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:27,924 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:27,924 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:27,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-07 17:16:27,996 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:27,997 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:16:27,997 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 17:16:27,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:16:27,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:16:27,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:16:27,998 INFO L87 Difference]: Start difference. First operand 4324 states and 5835 transitions. Second operand 4 states. [2019-10-07 17:16:28,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:28,556 INFO L93 Difference]: Finished difference Result 13527 states and 18987 transitions. [2019-10-07 17:16:28,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:16:28,556 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2019-10-07 17:16:28,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:28,626 INFO L225 Difference]: With dead ends: 13527 [2019-10-07 17:16:28,626 INFO L226 Difference]: Without dead ends: 9220 [2019-10-07 17:16:28,663 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 17:16:28,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9220 states. [2019-10-07 17:16:29,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9220 to 7022. [2019-10-07 17:16:29,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7022 states. [2019-10-07 17:16:29,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7022 states to 7022 states and 9784 transitions. [2019-10-07 17:16:29,258 INFO L78 Accepts]: Start accepts. Automaton has 7022 states and 9784 transitions. Word has length 105 [2019-10-07 17:16:29,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:29,261 INFO L462 AbstractCegarLoop]: Abstraction has 7022 states and 9784 transitions. [2019-10-07 17:16:29,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:16:29,261 INFO L276 IsEmpty]: Start isEmpty. Operand 7022 states and 9784 transitions. [2019-10-07 17:16:29,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-07 17:16:29,280 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:29,280 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, 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 17:16:29,280 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:29,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:29,281 INFO L82 PathProgramCache]: Analyzing trace with hash 588539568, now seen corresponding path program 1 times [2019-10-07 17:16:29,281 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:29,281 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:29,281 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:29,281 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:29,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:29,420 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-07 17:16:29,420 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:29,420 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:16:29,421 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 17:16:29,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:16:29,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:16:29,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 17:16:29,422 INFO L87 Difference]: Start difference. First operand 7022 states and 9784 transitions. Second operand 3 states. [2019-10-07 17:16:30,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:30,172 INFO L93 Difference]: Finished difference Result 19205 states and 27385 transitions. [2019-10-07 17:16:30,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:16:30,173 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2019-10-07 17:16:30,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:30,261 INFO L225 Difference]: With dead ends: 19205 [2019-10-07 17:16:30,261 INFO L226 Difference]: Without dead ends: 12200 [2019-10-07 17:16:30,323 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 17:16:30,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12200 states. [2019-10-07 17:16:31,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12200 to 9310. [2019-10-07 17:16:31,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9310 states. [2019-10-07 17:16:31,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9310 states to 9310 states and 13043 transitions. [2019-10-07 17:16:31,125 INFO L78 Accepts]: Start accepts. Automaton has 9310 states and 13043 transitions. Word has length 160 [2019-10-07 17:16:31,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:31,126 INFO L462 AbstractCegarLoop]: Abstraction has 9310 states and 13043 transitions. [2019-10-07 17:16:31,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:16:31,127 INFO L276 IsEmpty]: Start isEmpty. Operand 9310 states and 13043 transitions. [2019-10-07 17:16:31,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-07 17:16:31,148 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:31,148 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, 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 17:16:31,148 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:31,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:31,149 INFO L82 PathProgramCache]: Analyzing trace with hash -2106392766, now seen corresponding path program 1 times [2019-10-07 17:16:31,149 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:31,149 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:31,149 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:31,149 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:31,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:31,261 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-07 17:16:31,261 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:31,261 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:16:31,262 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 17:16:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:31,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 1076 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 17:16:31,472 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:16:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-07 17:16:31,531 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:16:32,228 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-07 17:16:32,229 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 17:16:32,229 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-07 17:16:32,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:16:32,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:16:32,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-07 17:16:32,230 INFO L87 Difference]: Start difference. First operand 9310 states and 13043 transitions. Second operand 4 states. [2019-10-07 17:16:33,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:33,457 INFO L93 Difference]: Finished difference Result 27634 states and 41625 transitions. [2019-10-07 17:16:33,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:16:33,457 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2019-10-07 17:16:33,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:33,550 INFO L225 Difference]: With dead ends: 27634 [2019-10-07 17:16:33,551 INFO L226 Difference]: Without dead ends: 18340 [2019-10-07 17:16:33,613 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-07 17:16:33,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18340 states. [2019-10-07 17:16:34,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18340 to 18191. [2019-10-07 17:16:34,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18191 states. [2019-10-07 17:16:34,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18191 states to 18191 states and 25553 transitions. [2019-10-07 17:16:34,838 INFO L78 Accepts]: Start accepts. Automaton has 18191 states and 25553 transitions. Word has length 161 [2019-10-07 17:16:34,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:34,841 INFO L462 AbstractCegarLoop]: Abstraction has 18191 states and 25553 transitions. [2019-10-07 17:16:34,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:16:34,845 INFO L276 IsEmpty]: Start isEmpty. Operand 18191 states and 25553 transitions. [2019-10-07 17:16:34,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-07 17:16:34,878 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:34,878 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, 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 17:16:35,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:16:35,083 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:35,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:35,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1392794045, now seen corresponding path program 1 times [2019-10-07 17:16:35,085 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:35,086 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:35,086 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:35,087 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:35,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-07 17:16:35,173 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:35,173 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:16:35,173 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 17:16:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:35,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 1120 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-07 17:16:35,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:16:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 17:16:35,420 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:16:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-07 17:16:35,602 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:16:35,603 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2019-10-07 17:16:35,603 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:16:35,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:16:35,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-07 17:16:35,605 INFO L87 Difference]: Start difference. First operand 18191 states and 25553 transitions. Second operand 3 states. [2019-10-07 17:16:37,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:37,626 INFO L93 Difference]: Finished difference Result 33850 states and 49015 transitions. [2019-10-07 17:16:37,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:16:37,626 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 165 [2019-10-07 17:16:37,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:37,745 INFO L225 Difference]: With dead ends: 33850 [2019-10-07 17:16:37,745 INFO L226 Difference]: Without dead ends: 24967 [2019-10-07 17:16:37,936 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-07 17:16:37,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24967 states. [2019-10-07 17:16:39,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24967 to 22495. [2019-10-07 17:16:39,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22495 states. [2019-10-07 17:16:39,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22495 states to 22495 states and 31653 transitions. [2019-10-07 17:16:39,766 INFO L78 Accepts]: Start accepts. Automaton has 22495 states and 31653 transitions. Word has length 165 [2019-10-07 17:16:39,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:39,766 INFO L462 AbstractCegarLoop]: Abstraction has 22495 states and 31653 transitions. [2019-10-07 17:16:39,766 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:16:39,767 INFO L276 IsEmpty]: Start isEmpty. Operand 22495 states and 31653 transitions. [2019-10-07 17:16:39,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-07 17:16:39,796 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:39,796 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, 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 17:16:40,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:16:40,009 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:40,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:40,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1514414118, now seen corresponding path program 1 times [2019-10-07 17:16:40,009 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:40,010 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:40,010 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:40,010 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:40,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-07 17:16:40,102 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:40,103 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:16:40,103 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 17:16:40,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:16:40,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:16:40,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 17:16:40,104 INFO L87 Difference]: Start difference. First operand 22495 states and 31653 transitions. Second operand 3 states. [2019-10-07 17:16:42,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:42,049 INFO L93 Difference]: Finished difference Result 59820 states and 87588 transitions. [2019-10-07 17:16:42,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:16:42,049 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2019-10-07 17:16:42,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:42,199 INFO L225 Difference]: With dead ends: 59820 [2019-10-07 17:16:42,199 INFO L226 Difference]: Without dead ends: 37342 [2019-10-07 17:16:42,386 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 17:16:42,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37342 states. [2019-10-07 17:16:44,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37342 to 34551. [2019-10-07 17:16:44,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34551 states. [2019-10-07 17:16:45,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34551 states to 34551 states and 48759 transitions. [2019-10-07 17:16:45,105 INFO L78 Accepts]: Start accepts. Automaton has 34551 states and 48759 transitions. Word has length 161 [2019-10-07 17:16:45,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:45,106 INFO L462 AbstractCegarLoop]: Abstraction has 34551 states and 48759 transitions. [2019-10-07 17:16:45,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:16:45,106 INFO L276 IsEmpty]: Start isEmpty. Operand 34551 states and 48759 transitions. [2019-10-07 17:16:45,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-07 17:16:45,135 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:45,135 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, 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 17:16:45,136 INFO L410 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:45,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:45,136 INFO L82 PathProgramCache]: Analyzing trace with hash -31282744, now seen corresponding path program 1 times [2019-10-07 17:16:45,136 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:45,136 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:45,137 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:45,137 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:45,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:45,256 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-07 17:16:45,256 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:45,256 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:16:45,257 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 17:16:45,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:16:45,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:16:45,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:16:45,258 INFO L87 Difference]: Start difference. First operand 34551 states and 48759 transitions. Second operand 4 states. [2019-10-07 17:16:48,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:48,562 INFO L93 Difference]: Finished difference Result 75837 states and 107035 transitions. [2019-10-07 17:16:48,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:16:48,563 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2019-10-07 17:16:48,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:48,696 INFO L225 Difference]: With dead ends: 75837 [2019-10-07 17:16:48,697 INFO L226 Difference]: Without dead ends: 41303 [2019-10-07 17:16:48,973 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 17:16:49,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41303 states. [2019-10-07 17:16:50,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41303 to 41239. [2019-10-07 17:16:50,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41239 states. [2019-10-07 17:16:50,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41239 states to 41239 states and 56093 transitions. [2019-10-07 17:16:50,797 INFO L78 Accepts]: Start accepts. Automaton has 41239 states and 56093 transitions. Word has length 162 [2019-10-07 17:16:50,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:50,797 INFO L462 AbstractCegarLoop]: Abstraction has 41239 states and 56093 transitions. [2019-10-07 17:16:50,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:16:50,798 INFO L276 IsEmpty]: Start isEmpty. Operand 41239 states and 56093 transitions. [2019-10-07 17:16:50,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-07 17:16:50,825 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:50,825 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, 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 17:16:50,826 INFO L410 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:50,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:50,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1292019503, now seen corresponding path program 1 times [2019-10-07 17:16:50,826 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:50,826 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:50,826 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:50,827 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:50,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-07 17:16:50,958 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:50,958 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:16:50,958 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-07 17:16:50,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-07 17:16:50,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-07 17:16:50,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-07 17:16:50,960 INFO L87 Difference]: Start difference. First operand 41239 states and 56093 transitions. Second operand 9 states. [2019-10-07 17:16:57,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:57,836 INFO L93 Difference]: Finished difference Result 133725 states and 195194 transitions. [2019-10-07 17:16:57,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-07 17:16:57,837 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 163 [2019-10-07 17:16:57,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:58,105 INFO L225 Difference]: With dead ends: 133725 [2019-10-07 17:16:58,105 INFO L226 Difference]: Without dead ends: 63192 [2019-10-07 17:16:58,672 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2019-10-07 17:16:58,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63192 states. [2019-10-07 17:17:00,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63192 to 56488. [2019-10-07 17:17:00,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56488 states. [2019-10-07 17:17:01,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56488 states to 56488 states and 80209 transitions. [2019-10-07 17:17:01,149 INFO L78 Accepts]: Start accepts. Automaton has 56488 states and 80209 transitions. Word has length 163 [2019-10-07 17:17:01,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:17:01,150 INFO L462 AbstractCegarLoop]: Abstraction has 56488 states and 80209 transitions. [2019-10-07 17:17:01,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-07 17:17:01,150 INFO L276 IsEmpty]: Start isEmpty. Operand 56488 states and 80209 transitions. [2019-10-07 17:17:01,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-07 17:17:01,196 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:17:01,197 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, 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 17:17:01,197 INFO L410 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:17:01,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:17:01,197 INFO L82 PathProgramCache]: Analyzing trace with hash 2016947387, now seen corresponding path program 1 times [2019-10-07 17:17:01,198 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:17:01,198 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:17:01,198 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:17:01,198 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:17:01,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:17:01,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:17:01,992 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-10-07 17:17:01,992 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:17:01,992 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:17:01,993 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 17:17:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:17:02,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 1241 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-07 17:17:02,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:17:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 17:17:02,942 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:17:03,153 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:17:03,257 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:17:03,258 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:17:03,288 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:17:03,320 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 24 proven. 14 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-07 17:17:03,321 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:17:03,321 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [29, 8] total 42 [2019-10-07 17:17:03,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-07 17:17:03,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-07 17:17:03,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2019-10-07 17:17:03,323 INFO L87 Difference]: Start difference. First operand 56488 states and 80209 transitions. Second operand 11 states. [2019-10-07 17:17:12,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:17:12,337 INFO L93 Difference]: Finished difference Result 155972 states and 250746 transitions. [2019-10-07 17:17:12,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-07 17:17:12,338 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 186 [2019-10-07 17:17:12,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:17:12,786 INFO L225 Difference]: With dead ends: 155972 [2019-10-07 17:17:12,786 INFO L226 Difference]: Without dead ends: 99501 [2019-10-07 17:17:13,348 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 368 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=334, Invalid=2746, Unknown=0, NotChecked=0, Total=3080 [2019-10-07 17:17:13,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99501 states. [2019-10-07 17:17:22,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99501 to 92654. [2019-10-07 17:17:22,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92654 states. [2019-10-07 17:17:23,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92654 states to 92654 states and 146010 transitions. [2019-10-07 17:17:23,285 INFO L78 Accepts]: Start accepts. Automaton has 92654 states and 146010 transitions. Word has length 186 [2019-10-07 17:17:23,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:17:23,285 INFO L462 AbstractCegarLoop]: Abstraction has 92654 states and 146010 transitions. [2019-10-07 17:17:23,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-07 17:17:23,285 INFO L276 IsEmpty]: Start isEmpty. Operand 92654 states and 146010 transitions. [2019-10-07 17:17:23,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2019-10-07 17:17:23,311 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:17:23,312 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, 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 17:17:23,516 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:17:23,517 INFO L410 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:17:23,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:17:23,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1027430955, now seen corresponding path program 1 times [2019-10-07 17:17:23,518 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:17:23,518 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:17:23,518 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:17:23,519 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:17:23,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:17:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:17:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-10-07 17:17:23,696 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:17:23,696 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:17:23,696 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 17:17:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:17:23,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 1255 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-07 17:17:23,978 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:17:24,004 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:17:24,005 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:17:24,006 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:17:24,006 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:17:24,007 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:17:24,008 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:17:24,156 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 17:17:24,156 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:17:24,339 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2019-10-07 17:17:24,455 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2019-10-07 17:17:25,656 WARN L191 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 155 DAG size of output: 35 [2019-10-07 17:17:25,931 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2019-10-07 17:17:26,042 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2019-10-07 17:17:26,888 WARN L191 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 35 [2019-10-07 17:17:26,951 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:17:26,952 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:17:26,953 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:17:26,954 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 7 terms [2019-10-07 17:17:26,985 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:17:27,057 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-07 17:17:27,057 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:17:27,058 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 6] total 16 [2019-10-07 17:17:27,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 17:17:27,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 17:17:27,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2019-10-07 17:17:27,059 INFO L87 Difference]: Start difference. First operand 92654 states and 146010 transitions. Second operand 6 states. [2019-10-07 17:17:32,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:17:32,915 INFO L93 Difference]: Finished difference Result 181428 states and 284494 transitions. [2019-10-07 17:17:32,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-07 17:17:32,916 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 188 [2019-10-07 17:17:32,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:17:33,280 INFO L225 Difference]: With dead ends: 181428 [2019-10-07 17:17:33,280 INFO L226 Difference]: Without dead ends: 88791 [2019-10-07 17:17:33,882 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 372 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2019-10-07 17:17:33,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88791 states. [2019-10-07 17:17:42,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88791 to 67112. [2019-10-07 17:17:42,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67112 states. [2019-10-07 17:17:42,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67112 states to 67112 states and 96147 transitions. [2019-10-07 17:17:42,585 INFO L78 Accepts]: Start accepts. Automaton has 67112 states and 96147 transitions. Word has length 188 [2019-10-07 17:17:42,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:17:42,585 INFO L462 AbstractCegarLoop]: Abstraction has 67112 states and 96147 transitions. [2019-10-07 17:17:42,585 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 17:17:42,586 INFO L276 IsEmpty]: Start isEmpty. Operand 67112 states and 96147 transitions. [2019-10-07 17:17:42,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-10-07 17:17:42,623 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:17:42,623 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, 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, 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 17:17:42,828 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:17:42,828 INFO L410 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:17:42,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:17:42,829 INFO L82 PathProgramCache]: Analyzing trace with hash -921605855, now seen corresponding path program 1 times [2019-10-07 17:17:42,829 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:17:42,830 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:17:42,830 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:17:42,830 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:17:42,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:17:42,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:17:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-10-07 17:17:42,961 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:17:42,961 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:17:42,962 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 17:17:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:17:43,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 1338 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-07 17:17:43,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:17:43,378 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-10-07 17:17:43,379 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:17:43,678 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:17:43,785 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:17:43,786 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:17:43,804 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:17:43,851 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-10-07 17:17:43,852 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:17:43,852 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 7] total 14 [2019-10-07 17:17:43,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-07 17:17:43,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-07 17:17:43,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-10-07 17:17:43,854 INFO L87 Difference]: Start difference. First operand 67112 states and 96147 transitions. Second operand 9 states. [2019-10-07 17:17:53,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:17:53,909 INFO L93 Difference]: Finished difference Result 190922 states and 313036 transitions. [2019-10-07 17:17:53,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-07 17:17:53,910 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 223 [2019-10-07 17:17:53,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:17:54,357 INFO L225 Difference]: With dead ends: 190922 [2019-10-07 17:17:54,357 INFO L226 Difference]: Without dead ends: 123957 [2019-10-07 17:17:56,110 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 440 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 17:17:56,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123957 states. [2019-10-07 17:18:08,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123957 to 120729. [2019-10-07 17:18:08,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120729 states. [2019-10-07 17:18:09,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120729 states to 120729 states and 188592 transitions. [2019-10-07 17:18:09,898 INFO L78 Accepts]: Start accepts. Automaton has 120729 states and 188592 transitions. Word has length 223 [2019-10-07 17:18:09,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:18:09,898 INFO L462 AbstractCegarLoop]: Abstraction has 120729 states and 188592 transitions. [2019-10-07 17:18:09,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-07 17:18:09,899 INFO L276 IsEmpty]: Start isEmpty. Operand 120729 states and 188592 transitions. [2019-10-07 17:18:09,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-10-07 17:18:09,953 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:18:09,953 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, 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, 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 17:18:10,158 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:18:10,158 INFO L410 AbstractCegarLoop]: === Iteration 16 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:18:10,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:18:10,159 INFO L82 PathProgramCache]: Analyzing trace with hash 261018617, now seen corresponding path program 1 times [2019-10-07 17:18:10,159 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:18:10,160 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:18:10,160 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:18:10,161 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:18:10,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:18:10,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:18:10,272 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-10-07 17:18:10,272 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:18:10,273 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:18:10,273 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 17:18:10,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:18:10,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 1352 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-07 17:18:10,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:18:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-07 17:18:10,614 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:18:10,845 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:18:10,949 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:18:10,950 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:18:10,963 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:18:10,996 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-10-07 17:18:10,997 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:18:10,997 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 7] total 14 [2019-10-07 17:18:10,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-07 17:18:10,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-07 17:18:10,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-10-07 17:18:10,998 INFO L87 Difference]: Start difference. First operand 120729 states and 188592 transitions. Second operand 9 states. [2019-10-07 17:18:33,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:18:33,582 INFO L93 Difference]: Finished difference Result 349535 states and 653135 transitions. [2019-10-07 17:18:33,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-07 17:18:33,582 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 225 [2019-10-07 17:18:33,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:18:34,437 INFO L225 Difference]: With dead ends: 349535 [2019-10-07 17:18:34,438 INFO L226 Difference]: Without dead ends: 228953 [2019-10-07 17:18:50,979 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2019-10-07 17:18:51,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228953 states. [2019-10-07 17:19:12,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228953 to 222363. [2019-10-07 17:19:12,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222363 states. [2019-10-07 17:19:17,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222363 states to 222363 states and 384559 transitions. [2019-10-07 17:19:17,746 INFO L78 Accepts]: Start accepts. Automaton has 222363 states and 384559 transitions. Word has length 225 [2019-10-07 17:19:17,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:19:17,747 INFO L462 AbstractCegarLoop]: Abstraction has 222363 states and 384559 transitions. [2019-10-07 17:19:17,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-07 17:19:17,747 INFO L276 IsEmpty]: Start isEmpty. Operand 222363 states and 384559 transitions. [2019-10-07 17:19:17,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-10-07 17:19:17,811 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:19:17,811 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, 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, 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 17:19:18,011 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:19:18,012 INFO L410 AbstractCegarLoop]: === Iteration 17 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:19:18,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:19:18,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1383814465, now seen corresponding path program 1 times [2019-10-07 17:19:18,013 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:19:18,013 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:19:18,014 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:19:18,014 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:19:18,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:19:18,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:19:18,139 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-10-07 17:19:18,140 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:19:18,140 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:19:18,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:19:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:19:18,405 INFO L256 TraceCheckSpWp]: Trace formula consists of 1366 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-07 17:19:18,410 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:19:18,544 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-07 17:19:18,545 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:19:18,749 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:19:18,843 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:19:18,844 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:19:18,860 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:19:18,896 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-10-07 17:19:18,897 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:19:18,897 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 7] total 14 [2019-10-07 17:19:18,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-07 17:19:18,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-07 17:19:18,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-10-07 17:19:18,898 INFO L87 Difference]: Start difference. First operand 222363 states and 384559 transitions. Second operand 9 states. [2019-10-07 17:20:48,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:20:48,606 INFO L93 Difference]: Finished difference Result 598342 states and 1349295 transitions. [2019-10-07 17:20:48,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-07 17:20:48,606 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 227 [2019-10-07 17:20:48,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:20:50,405 INFO L225 Difference]: With dead ends: 598342 [2019-10-07 17:20:50,405 INFO L226 Difference]: Without dead ends: 376126 [2019-10-07 17:21:12,524 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 448 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 17:21:12,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376126 states.