java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/systemc/pc_sfifo_2.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:29:07,827 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:29:07,829 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:29:07,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:29:07,843 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:29:07,845 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:29:07,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:29:07,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:29:07,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:29:07,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:29:07,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:29:07,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:29:07,865 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:29:07,866 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:29:07,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:29:07,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:29:07,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:29:07,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:29:07,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:29:07,881 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:29:07,882 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:29:07,886 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:29:07,887 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:29:07,888 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:29:07,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:29:07,890 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:29:07,890 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:29:07,891 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:29:07,892 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:29:07,895 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:29:07,895 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:29:07,896 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:29:07,897 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:29:07,898 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:29:07,901 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:29:07,902 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:29:07,903 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:29:07,903 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:29:07,903 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:29:07,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:29:07,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:29:07,909 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:29:07,924 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:29:07,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:29:07,926 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:29:07,926 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:29:07,926 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:29:07,926 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:29:07,926 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:29:07,927 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:29:07,927 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:29:07,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:29:07,927 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:29:07,928 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:29:07,928 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:29:07,928 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:29:07,928 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:29:07,928 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:29:07,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:29:07,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:29:07,929 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:29:07,929 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:29:07,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:29:07,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:29:07,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:29:07,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:29:07,930 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:29:07,931 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:29:07,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:29:07,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:29:07,931 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:29:08,258 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:29:08,278 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:29:08,282 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:29:08,283 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:29:08,284 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:29:08,285 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_2.cil-1.c [2019-10-13 21:29:08,355 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce16b20ff/126bc00eff9448e58b1afcda374bec82/FLAG7311656b3 [2019-10-13 21:29:08,867 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:29:08,868 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/pc_sfifo_2.cil-1.c [2019-10-13 21:29:08,879 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce16b20ff/126bc00eff9448e58b1afcda374bec82/FLAG7311656b3 [2019-10-13 21:29:09,222 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce16b20ff/126bc00eff9448e58b1afcda374bec82 [2019-10-13 21:29:09,235 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:29:09,237 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:29:09,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:29:09,238 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:29:09,242 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:29:09,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:29:09" (1/1) ... [2019-10-13 21:29:09,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76ddc9c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:29:09, skipping insertion in model container [2019-10-13 21:29:09,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:29:09" (1/1) ... [2019-10-13 21:29:09,254 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:29:09,298 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:29:09,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:29:09,510 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:29:09,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:29:09,698 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:29:09,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:29:09 WrapperNode [2019-10-13 21:29:09,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:29:09,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:29:09,699 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:29:09,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:29:09,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:29:09" (1/1) ... [2019-10-13 21:29:09,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:29:09" (1/1) ... [2019-10-13 21:29:09,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:29:09" (1/1) ... [2019-10-13 21:29:09,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:29:09" (1/1) ... [2019-10-13 21:29:09,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:29:09" (1/1) ... [2019-10-13 21:29:09,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:29:09" (1/1) ... [2019-10-13 21:29:09,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:29:09" (1/1) ... [2019-10-13 21:29:09,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:29:09,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:29:09,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:29:09,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:29:09,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:29:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:29:09,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:29:09,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:29:09,811 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-13 21:29:09,811 INFO L138 BoogieDeclarations]: Found implementation of procedure update_fifo_q [2019-10-13 21:29:09,811 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2019-10-13 21:29:09,811 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2019-10-13 21:29:09,811 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2019-10-13 21:29:09,812 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2019-10-13 21:29:09,812 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2019-10-13 21:29:09,812 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-10-13 21:29:09,812 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-13 21:29:09,812 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-13 21:29:09,812 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-10-13 21:29:09,813 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-10-13 21:29:09,813 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-10-13 21:29:09,813 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-13 21:29:09,813 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-13 21:29:09,813 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-13 21:29:09,814 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-13 21:29:09,814 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:29:09,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:29:09,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:29:09,814 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-13 21:29:09,814 INFO L130 BoogieDeclarations]: Found specification of procedure update_fifo_q [2019-10-13 21:29:09,815 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2019-10-13 21:29:09,815 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2019-10-13 21:29:09,815 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2019-10-13 21:29:09,815 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2019-10-13 21:29:09,815 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2019-10-13 21:29:09,816 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-10-13 21:29:09,816 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-13 21:29:09,816 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-13 21:29:09,816 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-10-13 21:29:09,816 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-10-13 21:29:09,816 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-10-13 21:29:09,816 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-13 21:29:09,817 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-13 21:29:09,817 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-13 21:29:09,817 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-13 21:29:09,817 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:29:09,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:29:09,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:29:10,355 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:29:10,355 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-13 21:29:10,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:29:10 BoogieIcfgContainer [2019-10-13 21:29:10,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:29:10,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:29:10,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:29:10,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:29:10,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:29:09" (1/3) ... [2019-10-13 21:29:10,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5536c482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:29:10, skipping insertion in model container [2019-10-13 21:29:10,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:29:09" (2/3) ... [2019-10-13 21:29:10,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5536c482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:29:10, skipping insertion in model container [2019-10-13 21:29:10,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:29:10" (3/3) ... [2019-10-13 21:29:10,364 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1.c [2019-10-13 21:29:10,374 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:29:10,382 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:29:10,393 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:29:10,419 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:29:10,419 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:29:10,420 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:29:10,420 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:29:10,420 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:29:10,420 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:29:10,420 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:29:10,421 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:29:10,443 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states. [2019-10-13 21:29:10,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-13 21:29:10,454 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:29:10,455 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:29:10,457 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:29:10,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:29:10,463 INFO L82 PathProgramCache]: Analyzing trace with hash 4101629, now seen corresponding path program 1 times [2019-10-13 21:29:10,471 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:29:10,471 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32769376] [2019-10-13 21:29:10,472 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:29:10,472 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:29:10,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:29:10,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:29:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:29:10,801 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32769376] [2019-10-13 21:29:10,802 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:29:10,803 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 21:29:10,803 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599762795] [2019-10-13 21:29:10,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:29:10,811 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:29:10,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:29:10,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:29:10,828 INFO L87 Difference]: Start difference. First operand 137 states. Second operand 5 states. [2019-10-13 21:29:11,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:29:11,662 INFO L93 Difference]: Finished difference Result 379 states and 545 transitions. [2019-10-13 21:29:11,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:29:11,664 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2019-10-13 21:29:11,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:29:11,694 INFO L225 Difference]: With dead ends: 379 [2019-10-13 21:29:11,695 INFO L226 Difference]: Without dead ends: 252 [2019-10-13 21:29:11,709 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:29:11,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-10-13 21:29:11,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 233. [2019-10-13 21:29:11,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2019-10-13 21:29:11,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 305 transitions. [2019-10-13 21:29:11,866 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 305 transitions. Word has length 78 [2019-10-13 21:29:11,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:29:11,867 INFO L462 AbstractCegarLoop]: Abstraction has 233 states and 305 transitions. [2019-10-13 21:29:11,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:29:11,867 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 305 transitions. [2019-10-13 21:29:11,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-13 21:29:11,873 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:29:11,873 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:29:11,873 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:29:11,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:29:11,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1430979773, now seen corresponding path program 1 times [2019-10-13 21:29:11,874 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:29:11,875 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189995054] [2019-10-13 21:29:11,875 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:29:11,875 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:29:11,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:29:11,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:29:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:29:12,035 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189995054] [2019-10-13 21:29:12,036 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:29:12,036 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:29:12,036 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485372836] [2019-10-13 21:29:12,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:29:12,039 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:29:12,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:29:12,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:29:12,040 INFO L87 Difference]: Start difference. First operand 233 states and 305 transitions. Second operand 6 states. [2019-10-13 21:29:12,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:29:12,963 INFO L93 Difference]: Finished difference Result 628 states and 843 transitions. [2019-10-13 21:29:12,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:29:12,964 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2019-10-13 21:29:12,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:29:12,970 INFO L225 Difference]: With dead ends: 628 [2019-10-13 21:29:12,971 INFO L226 Difference]: Without dead ends: 422 [2019-10-13 21:29:12,973 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:29:12,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2019-10-13 21:29:13,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 359. [2019-10-13 21:29:13,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2019-10-13 21:29:13,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 475 transitions. [2019-10-13 21:29:13,052 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 475 transitions. Word has length 78 [2019-10-13 21:29:13,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:29:13,052 INFO L462 AbstractCegarLoop]: Abstraction has 359 states and 475 transitions. [2019-10-13 21:29:13,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:29:13,053 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 475 transitions. [2019-10-13 21:29:13,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-13 21:29:13,058 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:29:13,058 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:29:13,058 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:29:13,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:29:13,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1477202113, now seen corresponding path program 1 times [2019-10-13 21:29:13,059 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:29:13,059 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215700327] [2019-10-13 21:29:13,060 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:29:13,060 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:29:13,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:29:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:29:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:29:13,146 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215700327] [2019-10-13 21:29:13,146 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:29:13,146 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:29:13,147 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238467702] [2019-10-13 21:29:13,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:29:13,148 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:29:13,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:29:13,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:29:13,149 INFO L87 Difference]: Start difference. First operand 359 states and 475 transitions. Second operand 6 states. [2019-10-13 21:29:13,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:29:13,216 INFO L93 Difference]: Finished difference Result 685 states and 908 transitions. [2019-10-13 21:29:13,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:29:13,217 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2019-10-13 21:29:13,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:29:13,221 INFO L225 Difference]: With dead ends: 685 [2019-10-13 21:29:13,221 INFO L226 Difference]: Without dead ends: 369 [2019-10-13 21:29:13,223 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:29:13,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2019-10-13 21:29:13,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 364. [2019-10-13 21:29:13,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2019-10-13 21:29:13,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 478 transitions. [2019-10-13 21:29:13,254 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 478 transitions. Word has length 78 [2019-10-13 21:29:13,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:29:13,255 INFO L462 AbstractCegarLoop]: Abstraction has 364 states and 478 transitions. [2019-10-13 21:29:13,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:29:13,255 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 478 transitions. [2019-10-13 21:29:13,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-13 21:29:13,259 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:29:13,260 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:29:13,260 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:29:13,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:29:13,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1229055619, now seen corresponding path program 1 times [2019-10-13 21:29:13,261 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:29:13,261 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613357046] [2019-10-13 21:29:13,261 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:29:13,261 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:29:13,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:29:13,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:29:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:29:13,383 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613357046] [2019-10-13 21:29:13,384 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:29:13,384 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:29:13,384 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401119440] [2019-10-13 21:29:13,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:29:13,386 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:29:13,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:29:13,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:29:13,387 INFO L87 Difference]: Start difference. First operand 364 states and 478 transitions. Second operand 4 states. [2019-10-13 21:29:13,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:29:13,585 INFO L93 Difference]: Finished difference Result 991 states and 1319 transitions. [2019-10-13 21:29:13,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:29:13,587 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2019-10-13 21:29:13,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:29:13,592 INFO L225 Difference]: With dead ends: 991 [2019-10-13 21:29:13,592 INFO L226 Difference]: Without dead ends: 670 [2019-10-13 21:29:13,594 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:29:13,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2019-10-13 21:29:13,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 651. [2019-10-13 21:29:13,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2019-10-13 21:29:13,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 834 transitions. [2019-10-13 21:29:13,641 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 834 transitions. Word has length 78 [2019-10-13 21:29:13,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:29:13,642 INFO L462 AbstractCegarLoop]: Abstraction has 651 states and 834 transitions. [2019-10-13 21:29:13,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:29:13,642 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 834 transitions. [2019-10-13 21:29:13,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-13 21:29:13,644 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:29:13,645 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:29:13,645 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:29:13,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:29:13,645 INFO L82 PathProgramCache]: Analyzing trace with hash 650743635, now seen corresponding path program 1 times [2019-10-13 21:29:13,646 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:29:13,646 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769937601] [2019-10-13 21:29:13,646 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:29:13,646 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:29:13,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:29:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:29:13,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:29:13,718 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769937601] [2019-10-13 21:29:13,718 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:29:13,718 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:29:13,718 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27382139] [2019-10-13 21:29:13,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:29:13,719 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:29:13,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:29:13,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:29:13,720 INFO L87 Difference]: Start difference. First operand 651 states and 834 transitions. Second operand 6 states. [2019-10-13 21:29:13,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:29:13,792 INFO L93 Difference]: Finished difference Result 1280 states and 1639 transitions. [2019-10-13 21:29:13,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:29:13,792 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2019-10-13 21:29:13,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:29:13,798 INFO L225 Difference]: With dead ends: 1280 [2019-10-13 21:29:13,798 INFO L226 Difference]: Without dead ends: 672 [2019-10-13 21:29:13,801 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:29:13,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2019-10-13 21:29:13,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 666. [2019-10-13 21:29:13,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 666 states. [2019-10-13 21:29:13,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 846 transitions. [2019-10-13 21:29:13,845 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 846 transitions. Word has length 78 [2019-10-13 21:29:13,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:29:13,845 INFO L462 AbstractCegarLoop]: Abstraction has 666 states and 846 transitions. [2019-10-13 21:29:13,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:29:13,846 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 846 transitions. [2019-10-13 21:29:13,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-13 21:29:13,848 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:29:13,848 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:29:13,848 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:29:13,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:29:13,849 INFO L82 PathProgramCache]: Analyzing trace with hash 578357077, now seen corresponding path program 1 times [2019-10-13 21:29:13,849 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:29:13,849 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961805004] [2019-10-13 21:29:13,849 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:29:13,850 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:29:13,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:29:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:29:14,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:29:14,002 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961805004] [2019-10-13 21:29:14,003 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:29:14,003 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:29:14,003 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314923162] [2019-10-13 21:29:14,004 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:29:14,005 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:29:14,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:29:14,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:29:14,005 INFO L87 Difference]: Start difference. First operand 666 states and 846 transitions. Second operand 6 states. [2019-10-13 21:29:14,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:29:14,834 INFO L93 Difference]: Finished difference Result 1359 states and 1714 transitions. [2019-10-13 21:29:14,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:29:14,834 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2019-10-13 21:29:14,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:29:14,841 INFO L225 Difference]: With dead ends: 1359 [2019-10-13 21:29:14,841 INFO L226 Difference]: Without dead ends: 831 [2019-10-13 21:29:14,843 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:29:14,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2019-10-13 21:29:14,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 682. [2019-10-13 21:29:14,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-13 21:29:14,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 855 transitions. [2019-10-13 21:29:14,895 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 855 transitions. Word has length 78 [2019-10-13 21:29:14,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:29:14,896 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 855 transitions. [2019-10-13 21:29:14,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:29:14,896 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 855 transitions. [2019-10-13 21:29:14,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-13 21:29:14,899 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:29:14,899 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:29:14,899 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:29:14,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:29:14,900 INFO L82 PathProgramCache]: Analyzing trace with hash 68883987, now seen corresponding path program 1 times [2019-10-13 21:29:14,900 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:29:14,900 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586651843] [2019-10-13 21:29:14,901 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:29:14,901 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:29:14,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:29:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:29:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:29:14,970 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586651843] [2019-10-13 21:29:14,970 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:29:14,970 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:29:14,971 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314976287] [2019-10-13 21:29:14,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:29:14,971 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:29:14,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:29:14,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:29:14,972 INFO L87 Difference]: Start difference. First operand 682 states and 855 transitions. Second operand 3 states. [2019-10-13 21:29:15,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:29:15,072 INFO L93 Difference]: Finished difference Result 1887 states and 2417 transitions. [2019-10-13 21:29:15,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:29:15,073 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2019-10-13 21:29:15,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:29:15,084 INFO L225 Difference]: With dead ends: 1887 [2019-10-13 21:29:15,084 INFO L226 Difference]: Without dead ends: 1276 [2019-10-13 21:29:15,087 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:29:15,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2019-10-13 21:29:15,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1272. [2019-10-13 21:29:15,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1272 states. [2019-10-13 21:29:15,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1606 transitions. [2019-10-13 21:29:15,170 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1606 transitions. Word has length 78 [2019-10-13 21:29:15,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:29:15,170 INFO L462 AbstractCegarLoop]: Abstraction has 1272 states and 1606 transitions. [2019-10-13 21:29:15,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:29:15,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1606 transitions. [2019-10-13 21:29:15,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-13 21:29:15,175 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:29:15,175 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:29:15,176 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:29:15,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:29:15,176 INFO L82 PathProgramCache]: Analyzing trace with hash 173246819, now seen corresponding path program 1 times [2019-10-13 21:29:15,176 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:29:15,177 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808520904] [2019-10-13 21:29:15,177 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:29:15,177 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:29:15,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:29:15,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:29:15,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:29:15,357 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808520904] [2019-10-13 21:29:15,357 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:29:15,358 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 21:29:15,358 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307214519] [2019-10-13 21:29:15,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:29:15,359 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:29:15,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:29:15,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:29:15,360 INFO L87 Difference]: Start difference. First operand 1272 states and 1606 transitions. Second operand 5 states. [2019-10-13 21:29:15,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:29:15,596 INFO L93 Difference]: Finished difference Result 3564 states and 4733 transitions. [2019-10-13 21:29:15,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:29:15,596 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2019-10-13 21:29:15,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:29:15,617 INFO L225 Difference]: With dead ends: 3564 [2019-10-13 21:29:15,617 INFO L226 Difference]: Without dead ends: 2309 [2019-10-13 21:29:15,627 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:29:15,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2019-10-13 21:29:15,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 2216. [2019-10-13 21:29:15,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2216 states. [2019-10-13 21:29:15,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2216 states to 2216 states and 2839 transitions. [2019-10-13 21:29:15,836 INFO L78 Accepts]: Start accepts. Automaton has 2216 states and 2839 transitions. Word has length 79 [2019-10-13 21:29:15,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:29:15,836 INFO L462 AbstractCegarLoop]: Abstraction has 2216 states and 2839 transitions. [2019-10-13 21:29:15,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:29:15,836 INFO L276 IsEmpty]: Start isEmpty. Operand 2216 states and 2839 transitions. [2019-10-13 21:29:15,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-13 21:29:15,839 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:29:15,840 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:29:15,840 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:29:15,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:29:15,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1970791480, now seen corresponding path program 1 times [2019-10-13 21:29:15,841 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:29:15,841 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919850604] [2019-10-13 21:29:15,841 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:29:15,841 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:29:15,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:29:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:29:15,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:29:15,970 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919850604] [2019-10-13 21:29:15,973 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:29:15,974 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 21:29:15,975 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898735690] [2019-10-13 21:29:15,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:29:15,976 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:29:15,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:29:15,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:29:15,979 INFO L87 Difference]: Start difference. First operand 2216 states and 2839 transitions. Second operand 5 states. [2019-10-13 21:29:16,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:29:16,811 INFO L93 Difference]: Finished difference Result 6956 states and 9741 transitions. [2019-10-13 21:29:16,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:29:16,812 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 87 [2019-10-13 21:29:16,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:29:16,851 INFO L225 Difference]: With dead ends: 6956 [2019-10-13 21:29:16,852 INFO L226 Difference]: Without dead ends: 4830 [2019-10-13 21:29:16,869 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:29:16,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4830 states. [2019-10-13 21:29:17,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4830 to 4685. [2019-10-13 21:29:17,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4685 states. [2019-10-13 21:29:17,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4685 states to 4685 states and 6275 transitions. [2019-10-13 21:29:17,257 INFO L78 Accepts]: Start accepts. Automaton has 4685 states and 6275 transitions. Word has length 87 [2019-10-13 21:29:17,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:29:17,259 INFO L462 AbstractCegarLoop]: Abstraction has 4685 states and 6275 transitions. [2019-10-13 21:29:17,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:29:17,259 INFO L276 IsEmpty]: Start isEmpty. Operand 4685 states and 6275 transitions. [2019-10-13 21:29:17,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-13 21:29:17,262 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:29:17,262 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:29:17,263 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:29:17,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:29:17,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1829324777, now seen corresponding path program 1 times [2019-10-13 21:29:17,264 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:29:17,264 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752424985] [2019-10-13 21:29:17,264 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:29:17,264 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:29:17,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:29:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:29:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:29:17,333 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752424985] [2019-10-13 21:29:17,334 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:29:17,334 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:29:17,334 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398648915] [2019-10-13 21:29:17,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:29:17,335 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:29:17,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:29:17,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:29:17,336 INFO L87 Difference]: Start difference. First operand 4685 states and 6275 transitions. Second operand 4 states. [2019-10-13 21:29:17,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:29:17,831 INFO L93 Difference]: Finished difference Result 6313 states and 8477 transitions. [2019-10-13 21:29:17,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:29:17,831 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2019-10-13 21:29:17,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:29:17,877 INFO L225 Difference]: With dead ends: 6313 [2019-10-13 21:29:17,877 INFO L226 Difference]: Without dead ends: 6310 [2019-10-13 21:29:17,881 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:29:17,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6310 states. [2019-10-13 21:29:18,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6310 to 6141. [2019-10-13 21:29:18,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6141 states. [2019-10-13 21:29:18,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6141 states to 6141 states and 8233 transitions. [2019-10-13 21:29:18,446 INFO L78 Accepts]: Start accepts. Automaton has 6141 states and 8233 transitions. Word has length 88 [2019-10-13 21:29:18,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:29:18,447 INFO L462 AbstractCegarLoop]: Abstraction has 6141 states and 8233 transitions. [2019-10-13 21:29:18,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:29:18,447 INFO L276 IsEmpty]: Start isEmpty. Operand 6141 states and 8233 transitions. [2019-10-13 21:29:18,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-13 21:29:18,450 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:29:18,451 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:29:18,451 INFO L410 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:29:18,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:29:18,452 INFO L82 PathProgramCache]: Analyzing trace with hash -874813360, now seen corresponding path program 1 times [2019-10-13 21:29:18,452 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:29:18,452 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164472308] [2019-10-13 21:29:18,453 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:29:18,453 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:29:18,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:29:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:29:18,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:29:18,582 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164472308] [2019-10-13 21:29:18,582 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333785474] [2019-10-13 21:29:18,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:29:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:29:18,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-13 21:29:18,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:29:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:29:18,893 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:29:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:29:19,086 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [843917097] [2019-10-13 21:29:19,104 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 90 [2019-10-13 21:29:19,156 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 21:29:19,156 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 21:29:19,381 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 21:29:19,384 INFO L272 AbstractInterpreter]: Visited 86 different actions 89 times. Merged at 2 different actions 2 times. Never widened. Performed 392 root evaluator evaluations with a maximum evaluation depth of 4. Performed 392 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 40 variables. [2019-10-13 21:29:19,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:29:19,390 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-13 21:29:19,567 INFO L227 lantSequenceWeakener]: Weakened 85 states. On average, predicates are now at 78.23% of their original sizes. [2019-10-13 21:29:19,567 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-13 21:29:20,130 INFO L553 sIntCurrentIteration]: We unified 88 AI predicates to 88 [2019-10-13 21:29:20,130 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-13 21:29:20,131 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-13 21:29:20,131 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [6, 7, 6] total 44 [2019-10-13 21:29:20,131 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115530464] [2019-10-13 21:29:20,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-13 21:29:20,133 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-13 21:29:20,133 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-13 21:29:20,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-13 21:29:20,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 21:29:20,134 INFO L87 Difference]: Start difference. First operand 6141 states and 8233 transitions. Second operand 33 states. [2019-10-13 21:29:32,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:29:32,201 INFO L93 Difference]: Finished difference Result 17739 states and 24326 transitions. [2019-10-13 21:29:32,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-13 21:29:32,201 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 89 [2019-10-13 21:29:32,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:29:32,315 INFO L225 Difference]: With dead ends: 17739 [2019-10-13 21:29:32,316 INFO L226 Difference]: Without dead ends: 11617 [2019-10-13 21:29:32,364 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=513, Invalid=2793, Unknown=0, NotChecked=0, Total=3306 [2019-10-13 21:29:32,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11617 states. [2019-10-13 21:29:33,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11617 to 10667. [2019-10-13 21:29:33,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10667 states. [2019-10-13 21:29:33,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10667 states to 10667 states and 14383 transitions. [2019-10-13 21:29:33,484 INFO L78 Accepts]: Start accepts. Automaton has 10667 states and 14383 transitions. Word has length 89 [2019-10-13 21:29:33,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:29:33,485 INFO L462 AbstractCegarLoop]: Abstraction has 10667 states and 14383 transitions. [2019-10-13 21:29:33,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-13 21:29:33,486 INFO L276 IsEmpty]: Start isEmpty. Operand 10667 states and 14383 transitions. [2019-10-13 21:29:33,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-13 21:29:33,491 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:29:33,492 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:29:33,701 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:29:33,701 INFO L410 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:29:33,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:29:33,702 INFO L82 PathProgramCache]: Analyzing trace with hash -851936585, now seen corresponding path program 1 times [2019-10-13 21:29:33,702 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:29:33,703 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866807401] [2019-10-13 21:29:33,703 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:29:33,704 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:29:33,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:29:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:29:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 21:29:33,818 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866807401] [2019-10-13 21:29:33,819 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:29:33,819 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:29:33,819 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705514499] [2019-10-13 21:29:33,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:29:33,820 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:29:33,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:29:33,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:29:33,822 INFO L87 Difference]: Start difference. First operand 10667 states and 14383 transitions. Second operand 7 states. [2019-10-13 21:29:34,170 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2019-10-13 21:29:37,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:29:37,142 INFO L93 Difference]: Finished difference Result 33769 states and 50119 transitions. [2019-10-13 21:29:37,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 21:29:37,143 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 100 [2019-10-13 21:29:37,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:29:37,298 INFO L225 Difference]: With dead ends: 33769 [2019-10-13 21:29:37,298 INFO L226 Difference]: Without dead ends: 21075 [2019-10-13 21:29:37,401 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2019-10-13 21:29:37,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21075 states.