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 0.1.24-13a467a-m [2019-10-15 03:32:24,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:32:24,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:32:25,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:32:25,016 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:32:25,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:32:25,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:32:25,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:32:25,037 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:32:25,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:32:25,039 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:32:25,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:32:25,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:32:25,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:32:25,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:32:25,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:32:25,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:32:25,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:32:25,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:32:25,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:32:25,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:32:25,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:32:25,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:32:25,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:32:25,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:32:25,073 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:32:25,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:32:25,076 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:32:25,077 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:32:25,079 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:32:25,080 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:32:25,081 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:32:25,082 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:32:25,083 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:32:25,087 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:32:25,087 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:32:25,088 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:32:25,088 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:32:25,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:32:25,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:32:25,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:32:25,093 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 03:32:25,111 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:32:25,111 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:32:25,114 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:32:25,114 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:32:25,114 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:32:25,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:32:25,114 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:32:25,115 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:32:25,115 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:32:25,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:32:25,116 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:32:25,116 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:32:25,117 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:32:25,117 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:32:25,117 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:32:25,117 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:32:25,118 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:32:25,118 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:32:25,118 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:32:25,118 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:32:25,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:32:25,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:32:25,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:32:25,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:32:25,119 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:32:25,119 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:32:25,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:32:25,120 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:32:25,120 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:32:25,434 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:32:25,454 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:32:25,458 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:32:25,459 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:32:25,459 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:32:25,460 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/transmitter.05.cil.c [2019-10-15 03:32:25,534 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24456f682/a59dfbbc303e4c1e838282f3000ed6de/FLAG2391c728d [2019-10-15 03:32:26,082 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:32:26,083 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/transmitter.05.cil.c [2019-10-15 03:32:26,100 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24456f682/a59dfbbc303e4c1e838282f3000ed6de/FLAG2391c728d [2019-10-15 03:32:26,467 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24456f682/a59dfbbc303e4c1e838282f3000ed6de [2019-10-15 03:32:26,477 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:32:26,479 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:32:26,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:32:26,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:32:26,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:32:26,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:32:26" (1/1) ... [2019-10-15 03:32:26,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7688e8f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:26, skipping insertion in model container [2019-10-15 03:32:26,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:32:26" (1/1) ... [2019-10-15 03:32:26,495 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:32:26,556 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:32:26,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:32:26,951 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:32:27,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:32:27,122 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:32:27,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:27 WrapperNode [2019-10-15 03:32:27,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:32:27,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:32:27,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:32:27,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:32:27,134 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:27" (1/1) ... [2019-10-15 03:32:27,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:27" (1/1) ... [2019-10-15 03:32:27,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:27" (1/1) ... [2019-10-15 03:32:27,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:27" (1/1) ... [2019-10-15 03:32:27,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:27" (1/1) ... [2019-10-15 03:32:27,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:27" (1/1) ... [2019-10-15 03:32:27,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:27" (1/1) ... [2019-10-15 03:32:27,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:32:27,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:32:27,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:32:27,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:32:27,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:32:27,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:32:27,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:32:27,244 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-15 03:32:27,244 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-10-15 03:32:27,244 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-10-15 03:32:27,244 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2019-10-15 03:32:27,245 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2019-10-15 03:32:27,245 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2019-10-15 03:32:27,245 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2019-10-15 03:32:27,245 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-10-15 03:32:27,245 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-10-15 03:32:27,245 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2019-10-15 03:32:27,246 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2019-10-15 03:32:27,246 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2019-10-15 03:32:27,246 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2019-10-15 03:32:27,246 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-10-15 03:32:27,246 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-15 03:32:27,246 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-15 03:32:27,247 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-15 03:32:27,247 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-10-15 03:32:27,247 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-10-15 03:32:27,247 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-10-15 03:32:27,247 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-10-15 03:32:27,247 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-10-15 03:32:27,248 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-10-15 03:32:27,248 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-15 03:32:27,248 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-15 03:32:27,248 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-15 03:32:27,248 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:32:27,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:32:27,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:32:27,249 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-15 03:32:27,249 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-10-15 03:32:27,249 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-10-15 03:32:27,249 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2019-10-15 03:32:27,249 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2019-10-15 03:32:27,250 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2019-10-15 03:32:27,250 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2019-10-15 03:32:27,250 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-10-15 03:32:27,250 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-10-15 03:32:27,250 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-10-15 03:32:27,250 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2019-10-15 03:32:27,251 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2019-10-15 03:32:27,251 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2019-10-15 03:32:27,251 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2019-10-15 03:32:27,251 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-10-15 03:32:27,251 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-15 03:32:27,251 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-15 03:32:27,252 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-15 03:32:27,252 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-10-15 03:32:27,252 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-10-15 03:32:27,252 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-10-15 03:32:27,252 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-10-15 03:32:27,252 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-10-15 03:32:27,253 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-15 03:32:27,253 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-15 03:32:27,253 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-15 03:32:27,253 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:32:27,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:32:27,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:32:28,655 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:32:28,656 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-15 03:32:28,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:32:28 BoogieIcfgContainer [2019-10-15 03:32:28,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:32:28,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:32:28,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:32:28,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:32:28,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:32:26" (1/3) ... [2019-10-15 03:32:28,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41516895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:32:28, skipping insertion in model container [2019-10-15 03:32:28,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:27" (2/3) ... [2019-10-15 03:32:28,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41516895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:32:28, skipping insertion in model container [2019-10-15 03:32:28,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:32:28" (3/3) ... [2019-10-15 03:32:28,666 INFO L109 eAbstractionObserver]: Analyzing ICFG transmitter.05.cil.c [2019-10-15 03:32:28,677 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:32:28,687 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:32:28,699 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:32:28,729 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:32:28,730 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:32:28,730 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:32:28,730 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:32:28,731 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:32:28,731 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:32:28,731 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:32:28,731 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:32:28,756 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states. [2019-10-15 03:32:28,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-15 03:32:28,768 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:28,769 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, 1] [2019-10-15 03:32:28,771 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:28,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:28,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1812036435, now seen corresponding path program 1 times [2019-10-15 03:32:28,788 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:28,788 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677994779] [2019-10-15 03:32:28,788 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:28,789 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:28,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:29,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:32:29,233 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677994779] [2019-10-15 03:32:29,234 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:32:29,235 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:32:29,236 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465601923] [2019-10-15 03:32:29,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:29,244 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:29,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:29,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:29,263 INFO L87 Difference]: Start difference. First operand 174 states. Second operand 4 states. [2019-10-15 03:32:29,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:29,796 INFO L93 Difference]: Finished difference Result 481 states and 669 transitions. [2019-10-15 03:32:29,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:29,798 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2019-10-15 03:32:29,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:29,816 INFO L225 Difference]: With dead ends: 481 [2019-10-15 03:32:29,817 INFO L226 Difference]: Without dead ends: 311 [2019-10-15 03:32:29,823 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:29,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2019-10-15 03:32:29,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 307. [2019-10-15 03:32:29,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2019-10-15 03:32:29,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 397 transitions. [2019-10-15 03:32:29,977 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 397 transitions. Word has length 88 [2019-10-15 03:32:29,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:29,978 INFO L462 AbstractCegarLoop]: Abstraction has 307 states and 397 transitions. [2019-10-15 03:32:29,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:29,979 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 397 transitions. [2019-10-15 03:32:29,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-15 03:32:29,991 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:29,991 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, 1] [2019-10-15 03:32:29,992 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:29,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:29,994 INFO L82 PathProgramCache]: Analyzing trace with hash -2105288044, now seen corresponding path program 1 times [2019-10-15 03:32:29,994 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:29,995 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609650888] [2019-10-15 03:32:29,995 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:29,995 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:29,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:32:30,221 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609650888] [2019-10-15 03:32:30,221 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:32:30,222 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:32:30,222 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049218828] [2019-10-15 03:32:30,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:30,227 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:30,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:30,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:30,231 INFO L87 Difference]: Start difference. First operand 307 states and 397 transitions. Second operand 4 states. [2019-10-15 03:32:30,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:30,540 INFO L93 Difference]: Finished difference Result 880 states and 1201 transitions. [2019-10-15 03:32:30,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:30,543 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2019-10-15 03:32:30,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:30,549 INFO L225 Difference]: With dead ends: 880 [2019-10-15 03:32:30,549 INFO L226 Difference]: Without dead ends: 589 [2019-10-15 03:32:30,552 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:30,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2019-10-15 03:32:30,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 584. [2019-10-15 03:32:30,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-10-15 03:32:30,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 752 transitions. [2019-10-15 03:32:30,605 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 752 transitions. Word has length 88 [2019-10-15 03:32:30,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:30,606 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 752 transitions. [2019-10-15 03:32:30,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:30,607 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 752 transitions. [2019-10-15 03:32:30,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-15 03:32:30,609 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:30,609 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, 1] [2019-10-15 03:32:30,611 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:30,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:30,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1048031859, now seen corresponding path program 1 times [2019-10-15 03:32:30,611 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:30,612 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306564303] [2019-10-15 03:32:30,612 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:30,612 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:30,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:30,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:32:30,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306564303] [2019-10-15 03:32:30,740 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:32:30,740 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:32:30,741 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26361938] [2019-10-15 03:32:30,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:30,743 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:30,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:30,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:30,744 INFO L87 Difference]: Start difference. First operand 584 states and 752 transitions. Second operand 4 states. [2019-10-15 03:32:31,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:31,070 INFO L93 Difference]: Finished difference Result 1703 states and 2316 transitions. [2019-10-15 03:32:31,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:31,072 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2019-10-15 03:32:31,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:31,081 INFO L225 Difference]: With dead ends: 1703 [2019-10-15 03:32:31,082 INFO L226 Difference]: Without dead ends: 1135 [2019-10-15 03:32:31,086 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:31,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2019-10-15 03:32:31,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 1128. [2019-10-15 03:32:31,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1128 states. [2019-10-15 03:32:31,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1446 transitions. [2019-10-15 03:32:31,172 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1446 transitions. Word has length 88 [2019-10-15 03:32:31,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:31,173 INFO L462 AbstractCegarLoop]: Abstraction has 1128 states and 1446 transitions. [2019-10-15 03:32:31,173 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:31,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1446 transitions. [2019-10-15 03:32:31,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-15 03:32:31,175 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:31,175 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:31,176 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:31,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:31,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1052809356, now seen corresponding path program 1 times [2019-10-15 03:32:31,176 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:31,177 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370651067] [2019-10-15 03:32:31,177 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:31,177 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:31,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:31,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:32:31,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370651067] [2019-10-15 03:32:31,308 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:32:31,308 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:32:31,308 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805630453] [2019-10-15 03:32:31,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:31,309 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:31,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:31,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:31,310 INFO L87 Difference]: Start difference. First operand 1128 states and 1446 transitions. Second operand 4 states. [2019-10-15 03:32:31,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:31,722 INFO L93 Difference]: Finished difference Result 3319 states and 4508 transitions. [2019-10-15 03:32:31,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:31,723 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2019-10-15 03:32:31,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:31,741 INFO L225 Difference]: With dead ends: 3319 [2019-10-15 03:32:31,741 INFO L226 Difference]: Without dead ends: 2207 [2019-10-15 03:32:31,751 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:31,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2019-10-15 03:32:31,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 2196. [2019-10-15 03:32:31,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2196 states. [2019-10-15 03:32:31,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 2808 transitions. [2019-10-15 03:32:31,954 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 2808 transitions. Word has length 88 [2019-10-15 03:32:31,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:31,955 INFO L462 AbstractCegarLoop]: Abstraction has 2196 states and 2808 transitions. [2019-10-15 03:32:31,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:31,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 2808 transitions. [2019-10-15 03:32:31,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-15 03:32:31,965 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:31,966 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, 1] [2019-10-15 03:32:31,966 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:31,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:31,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1967055251, now seen corresponding path program 1 times [2019-10-15 03:32:31,967 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:31,967 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795278084] [2019-10-15 03:32:31,968 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:31,968 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:31,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:32,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:32,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:32:32,114 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795278084] [2019-10-15 03:32:32,114 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:32:32,114 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:32:32,115 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735011201] [2019-10-15 03:32:32,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:32:32,116 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:32,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:32:32,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:32:32,122 INFO L87 Difference]: Start difference. First operand 2196 states and 2808 transitions. Second operand 3 states. [2019-10-15 03:32:32,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:32,466 INFO L93 Difference]: Finished difference Result 6504 states and 8979 transitions. [2019-10-15 03:32:32,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:32:32,466 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2019-10-15 03:32:32,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:32,498 INFO L225 Difference]: With dead ends: 6504 [2019-10-15 03:32:32,498 INFO L226 Difference]: Without dead ends: 4324 [2019-10-15 03:32:32,515 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:32:32,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2019-10-15 03:32:32,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 4324. [2019-10-15 03:32:32,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4324 states. [2019-10-15 03:32:32,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4324 states to 4324 states and 5835 transitions. [2019-10-15 03:32:32,824 INFO L78 Accepts]: Start accepts. Automaton has 4324 states and 5835 transitions. Word has length 88 [2019-10-15 03:32:32,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:32,827 INFO L462 AbstractCegarLoop]: Abstraction has 4324 states and 5835 transitions. [2019-10-15 03:32:32,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:32:32,827 INFO L276 IsEmpty]: Start isEmpty. Operand 4324 states and 5835 transitions. [2019-10-15 03:32:32,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-15 03:32:32,838 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:32,838 INFO L380 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] [2019-10-15 03:32:32,839 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:32,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:32,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1325517121, now seen corresponding path program 1 times [2019-10-15 03:32:32,839 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:32,840 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559655963] [2019-10-15 03:32:32,840 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:32,840 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:32,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:32,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:33,036 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 03:32:33,036 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559655963] [2019-10-15 03:32:33,036 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:32:33,037 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:32:33,037 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415503284] [2019-10-15 03:32:33,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:33,038 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:33,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:33,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:33,038 INFO L87 Difference]: Start difference. First operand 4324 states and 5835 transitions. Second operand 4 states. [2019-10-15 03:32:33,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:33,568 INFO L93 Difference]: Finished difference Result 13527 states and 18987 transitions. [2019-10-15 03:32:33,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:33,569 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2019-10-15 03:32:33,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:33,657 INFO L225 Difference]: With dead ends: 13527 [2019-10-15 03:32:33,658 INFO L226 Difference]: Without dead ends: 9220 [2019-10-15 03:32:33,716 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:33,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9220 states. [2019-10-15 03:32:34,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9220 to 7022. [2019-10-15 03:32:34,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7022 states. [2019-10-15 03:32:34,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7022 states to 7022 states and 9784 transitions. [2019-10-15 03:32:34,506 INFO L78 Accepts]: Start accepts. Automaton has 7022 states and 9784 transitions. Word has length 105 [2019-10-15 03:32:34,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:34,508 INFO L462 AbstractCegarLoop]: Abstraction has 7022 states and 9784 transitions. [2019-10-15 03:32:34,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:34,509 INFO L276 IsEmpty]: Start isEmpty. Operand 7022 states and 9784 transitions. [2019-10-15 03:32:34,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-15 03:32:34,526 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:34,526 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:34,527 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:34,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:34,527 INFO L82 PathProgramCache]: Analyzing trace with hash 588539568, now seen corresponding path program 1 times [2019-10-15 03:32:34,528 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:34,528 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653370525] [2019-10-15 03:32:34,528 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:34,528 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:34,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:34,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:34,704 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-15 03:32:34,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653370525] [2019-10-15 03:32:34,705 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:32:34,705 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:32:34,705 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556896071] [2019-10-15 03:32:34,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:32:34,706 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:34,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:32:34,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:32:34,707 INFO L87 Difference]: Start difference. First operand 7022 states and 9784 transitions. Second operand 3 states. [2019-10-15 03:32:35,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:35,508 INFO L93 Difference]: Finished difference Result 19205 states and 27385 transitions. [2019-10-15 03:32:35,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:32:35,509 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2019-10-15 03:32:35,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:35,611 INFO L225 Difference]: With dead ends: 19205 [2019-10-15 03:32:35,611 INFO L226 Difference]: Without dead ends: 12200 [2019-10-15 03:32:35,680 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:32:35,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12200 states. [2019-10-15 03:32:36,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12200 to 9310. [2019-10-15 03:32:36,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9310 states. [2019-10-15 03:32:36,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9310 states to 9310 states and 13043 transitions. [2019-10-15 03:32:36,445 INFO L78 Accepts]: Start accepts. Automaton has 9310 states and 13043 transitions. Word has length 160 [2019-10-15 03:32:36,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:36,446 INFO L462 AbstractCegarLoop]: Abstraction has 9310 states and 13043 transitions. [2019-10-15 03:32:36,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:32:36,446 INFO L276 IsEmpty]: Start isEmpty. Operand 9310 states and 13043 transitions. [2019-10-15 03:32:36,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-15 03:32:36,465 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:36,465 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:36,465 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:36,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:36,466 INFO L82 PathProgramCache]: Analyzing trace with hash -2106392766, now seen corresponding path program 1 times [2019-10-15 03:32:36,466 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:36,466 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938439142] [2019-10-15 03:32:36,466 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:36,466 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:36,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:36,693 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-15 03:32:36,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938439142] [2019-10-15 03:32:36,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485311662] [2019-10-15 03:32:36,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:36,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:36,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 1076 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:32:36,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 03:32:37,051 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-15 03:32:37,278 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:32:37,278 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-15 03:32:37,279 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063224517] [2019-10-15 03:32:37,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:37,280 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:37,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:37,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:32:37,284 INFO L87 Difference]: Start difference. First operand 9310 states and 13043 transitions. Second operand 4 states. [2019-10-15 03:32:38,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:38,561 INFO L93 Difference]: Finished difference Result 27634 states and 41625 transitions. [2019-10-15 03:32:38,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:38,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2019-10-15 03:32:38,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:38,664 INFO L225 Difference]: With dead ends: 27634 [2019-10-15 03:32:38,664 INFO L226 Difference]: Without dead ends: 18340 [2019-10-15 03:32:38,739 INFO L600 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 [2019-10-15 03:32:38,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18340 states. [2019-10-15 03:32:40,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18340 to 18191. [2019-10-15 03:32:40,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18191 states. [2019-10-15 03:32:40,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18191 states to 18191 states and 25553 transitions. [2019-10-15 03:32:40,605 INFO L78 Accepts]: Start accepts. Automaton has 18191 states and 25553 transitions. Word has length 161 [2019-10-15 03:32:40,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:40,607 INFO L462 AbstractCegarLoop]: Abstraction has 18191 states and 25553 transitions. [2019-10-15 03:32:40,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:40,607 INFO L276 IsEmpty]: Start isEmpty. Operand 18191 states and 25553 transitions. [2019-10-15 03:32:40,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-15 03:32:40,637 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:40,637 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:40,841 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:40,841 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:40,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:40,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1392794045, now seen corresponding path program 1 times [2019-10-15 03:32:40,842 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:40,842 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109333126] [2019-10-15 03:32:40,842 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:40,843 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:40,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:40,941 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-15 03:32:40,941 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109333126] [2019-10-15 03:32:40,942 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88631891] [2019-10-15 03:32:40,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:41,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 1120 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:32:41,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:32:41,343 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-15 03:32:41,520 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:32:41,520 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2019-10-15 03:32:41,521 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316246620] [2019-10-15 03:32:41,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:32:41,521 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:41,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:32:41,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:32:41,522 INFO L87 Difference]: Start difference. First operand 18191 states and 25553 transitions. Second operand 3 states. [2019-10-15 03:32:43,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:43,239 INFO L93 Difference]: Finished difference Result 33850 states and 49015 transitions. [2019-10-15 03:32:43,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:32:43,240 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 165 [2019-10-15 03:32:43,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:43,350 INFO L225 Difference]: With dead ends: 33850 [2019-10-15 03:32:43,350 INFO L226 Difference]: Without dead ends: 24967 [2019-10-15 03:32:43,486 INFO L600 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 [2019-10-15 03:32:43,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24967 states. [2019-10-15 03:32:45,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24967 to 22495. [2019-10-15 03:32:45,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22495 states. [2019-10-15 03:32:45,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22495 states to 22495 states and 31653 transitions. [2019-10-15 03:32:45,846 INFO L78 Accepts]: Start accepts. Automaton has 22495 states and 31653 transitions. Word has length 165 [2019-10-15 03:32:45,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:45,847 INFO L462 AbstractCegarLoop]: Abstraction has 22495 states and 31653 transitions. [2019-10-15 03:32:45,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:32:45,847 INFO L276 IsEmpty]: Start isEmpty. Operand 22495 states and 31653 transitions. [2019-10-15 03:32:45,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-15 03:32:45,875 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:45,875 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:46,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:46,080 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:46,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:46,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1514414118, now seen corresponding path program 1 times [2019-10-15 03:32:46,081 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:46,083 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538420607] [2019-10-15 03:32:46,083 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:46,083 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:46,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:46,179 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-15 03:32:46,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538420607] [2019-10-15 03:32:46,180 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:32:46,180 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:32:46,181 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776030996] [2019-10-15 03:32:46,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:32:46,181 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:46,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:32:46,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:32:46,182 INFO L87 Difference]: Start difference. First operand 22495 states and 31653 transitions. Second operand 3 states. [2019-10-15 03:32:47,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:47,746 INFO L93 Difference]: Finished difference Result 59820 states and 87588 transitions. [2019-10-15 03:32:47,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:32:47,747 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2019-10-15 03:32:47,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:47,915 INFO L225 Difference]: With dead ends: 59820 [2019-10-15 03:32:47,916 INFO L226 Difference]: Without dead ends: 37342 [2019-10-15 03:32:48,184 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:32:48,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37342 states. [2019-10-15 03:32:50,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37342 to 34551. [2019-10-15 03:32:50,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34551 states. [2019-10-15 03:32:50,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34551 states to 34551 states and 48759 transitions. [2019-10-15 03:32:50,796 INFO L78 Accepts]: Start accepts. Automaton has 34551 states and 48759 transitions. Word has length 161 [2019-10-15 03:32:50,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:50,797 INFO L462 AbstractCegarLoop]: Abstraction has 34551 states and 48759 transitions. [2019-10-15 03:32:50,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:32:50,797 INFO L276 IsEmpty]: Start isEmpty. Operand 34551 states and 48759 transitions. [2019-10-15 03:32:50,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-15 03:32:50,826 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:50,826 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:50,826 INFO L410 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:50,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:50,826 INFO L82 PathProgramCache]: Analyzing trace with hash -31282744, now seen corresponding path program 1 times [2019-10-15 03:32:50,827 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:50,827 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205852028] [2019-10-15 03:32:50,827 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:50,827 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:50,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:50,926 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-15 03:32:50,926 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205852028] [2019-10-15 03:32:50,927 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:32:50,927 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:32:50,927 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565479889] [2019-10-15 03:32:50,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:50,928 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:50,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:50,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:50,929 INFO L87 Difference]: Start difference. First operand 34551 states and 48759 transitions. Second operand 4 states. [2019-10-15 03:32:53,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:53,655 INFO L93 Difference]: Finished difference Result 75837 states and 107035 transitions. [2019-10-15 03:32:53,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:53,656 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2019-10-15 03:32:53,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:53,814 INFO L225 Difference]: With dead ends: 75837 [2019-10-15 03:32:53,815 INFO L226 Difference]: Without dead ends: 41303 [2019-10-15 03:32:54,383 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:54,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41303 states. [2019-10-15 03:32:55,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41303 to 41239. [2019-10-15 03:32:55,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41239 states. [2019-10-15 03:32:56,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41239 states to 41239 states and 56093 transitions. [2019-10-15 03:32:56,143 INFO L78 Accepts]: Start accepts. Automaton has 41239 states and 56093 transitions. Word has length 162 [2019-10-15 03:32:56,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:56,144 INFO L462 AbstractCegarLoop]: Abstraction has 41239 states and 56093 transitions. [2019-10-15 03:32:56,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:56,144 INFO L276 IsEmpty]: Start isEmpty. Operand 41239 states and 56093 transitions. [2019-10-15 03:32:56,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-15 03:32:56,175 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:56,176 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:56,176 INFO L410 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:56,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:56,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1292019503, now seen corresponding path program 1 times [2019-10-15 03:32:56,177 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:56,177 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873434864] [2019-10-15 03:32:56,177 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:56,177 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:56,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:56,307 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 03:32:56,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873434864] [2019-10-15 03:32:56,308 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:32:56,308 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-15 03:32:56,308 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570706721] [2019-10-15 03:32:56,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 03:32:56,309 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:56,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 03:32:56,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-15 03:32:56,309 INFO L87 Difference]: Start difference. First operand 41239 states and 56093 transitions. Second operand 9 states.