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/token_ring.06.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:32:00,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:32:00,105 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:32:00,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:32:00,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:32:00,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:32:00,125 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:32:00,126 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:32:00,128 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:32:00,129 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:32:00,130 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:32:00,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:32:00,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:32:00,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:32:00,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:32:00,134 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:32:00,135 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:32:00,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:32:00,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:32:00,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:32:00,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:32:00,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:32:00,144 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:32:00,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:32:00,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:32:00,150 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:32:00,150 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:32:00,151 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:32:00,154 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:32:00,155 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:32:00,155 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:32:00,158 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:32:00,159 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:32:00,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:32:00,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:32:00,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:32:00,165 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:32:00,165 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:32:00,165 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:32:00,166 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:32:00,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:32:00,171 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 03:32:00,196 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:32:00,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:32:00,198 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:32:00,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:32:00,199 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:32:00,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:32:00,199 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:32:00,199 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:32:00,199 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:32:00,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:32:00,201 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:32:00,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:32:00,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:32:00,202 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:32:00,202 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:32:00,202 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:32:00,202 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:32:00,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:32:00,203 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:32:00,203 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:32:00,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:32:00,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:32:00,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:32:00,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:32:00,204 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:32:00,204 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:32:00,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:32:00,205 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:32:00,205 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 03:32:00,483 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:32:00,496 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:32:00,500 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:32:00,501 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:32:00,502 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:32:00,502 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.06.cil-1.c [2019-10-15 03:32:00,580 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da3707852/9988e6fb0156434caa2f12a4c076849f/FLAGe61db9d94 [2019-10-15 03:32:01,073 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:32:01,077 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/token_ring.06.cil-1.c [2019-10-15 03:32:01,095 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da3707852/9988e6fb0156434caa2f12a4c076849f/FLAGe61db9d94 [2019-10-15 03:32:01,411 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da3707852/9988e6fb0156434caa2f12a4c076849f [2019-10-15 03:32:01,421 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:32:01,422 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:32:01,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:32:01,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:32:01,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:32:01,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:32:01" (1/1) ... [2019-10-15 03:32:01,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6608a0f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:01, skipping insertion in model container [2019-10-15 03:32:01,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:32:01" (1/1) ... [2019-10-15 03:32:01,437 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:32:01,489 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:32:01,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:32:01,762 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:32:01,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:32:01,944 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:32:01,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:01 WrapperNode [2019-10-15 03:32:01,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:32:01,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:32:01,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:32:01,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:32:01,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:01" (1/1) ... [2019-10-15 03:32:01,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:01" (1/1) ... [2019-10-15 03:32:01,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:01" (1/1) ... [2019-10-15 03:32:01,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:01" (1/1) ... [2019-10-15 03:32:01,983 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:01" (1/1) ... [2019-10-15 03:32:02,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:01" (1/1) ... [2019-10-15 03:32:02,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:01" (1/1) ... [2019-10-15 03:32:02,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:32:02,012 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:32:02,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:32:02,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:32:02,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:01" (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 03:32:02,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:32:02,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:32:02,070 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-15 03:32:02,070 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-10-15 03:32:02,070 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-10-15 03:32:02,070 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2019-10-15 03:32:02,070 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2019-10-15 03:32:02,070 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2019-10-15 03:32:02,071 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2019-10-15 03:32:02,071 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit6 [2019-10-15 03:32:02,071 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-10-15 03:32:02,071 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-10-15 03:32:02,071 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2019-10-15 03:32:02,072 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2019-10-15 03:32:02,072 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2019-10-15 03:32:02,072 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2019-10-15 03:32:02,072 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit6_triggered [2019-10-15 03:32:02,072 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-10-15 03:32:02,072 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-15 03:32:02,073 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-15 03:32:02,073 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-15 03:32:02,073 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-10-15 03:32:02,073 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-10-15 03:32:02,073 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-10-15 03:32:02,073 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-10-15 03:32:02,074 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-10-15 03:32:02,074 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-10-15 03:32:02,074 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-15 03:32:02,074 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-15 03:32:02,074 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-15 03:32:02,074 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:32:02,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:32:02,077 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-15 03:32:02,077 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-10-15 03:32:02,077 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-10-15 03:32:02,077 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2019-10-15 03:32:02,077 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2019-10-15 03:32:02,077 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2019-10-15 03:32:02,078 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2019-10-15 03:32:02,078 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit6_triggered [2019-10-15 03:32:02,078 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-10-15 03:32:02,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:32:02,078 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-10-15 03:32:02,078 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-10-15 03:32:02,078 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2019-10-15 03:32:02,079 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2019-10-15 03:32:02,079 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2019-10-15 03:32:02,079 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2019-10-15 03:32:02,079 INFO L130 BoogieDeclarations]: Found specification of procedure transmit6 [2019-10-15 03:32:02,079 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-10-15 03:32:02,079 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-15 03:32:02,079 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-15 03:32:02,080 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-15 03:32:02,080 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-10-15 03:32:02,080 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-10-15 03:32:02,080 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-10-15 03:32:02,080 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-10-15 03:32:02,080 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-10-15 03:32:02,081 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-15 03:32:02,081 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-15 03:32:02,081 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-15 03:32:02,081 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:32:02,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:32:02,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:32:03,777 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:32:03,777 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-15 03:32:03,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:32:03 BoogieIcfgContainer [2019-10-15 03:32:03,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:32:03,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:32:03,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:32:03,784 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:32:03,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:32:01" (1/3) ... [2019-10-15 03:32:03,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@285909cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:32:03, skipping insertion in model container [2019-10-15 03:32:03,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:01" (2/3) ... [2019-10-15 03:32:03,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@285909cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:32:03, skipping insertion in model container [2019-10-15 03:32:03,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:32:03" (3/3) ... [2019-10-15 03:32:03,788 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.06.cil-1.c [2019-10-15 03:32:03,798 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:32:03,807 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:32:03,819 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:32:03,848 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:32:03,848 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:32:03,849 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:32:03,849 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:32:03,849 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:32:03,849 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:32:03,850 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:32:03,850 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:32:03,875 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states. [2019-10-15 03:32:03,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-15 03:32:03,888 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:03,889 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, 1, 1, 1, 1] [2019-10-15 03:32:03,892 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:03,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:03,899 INFO L82 PathProgramCache]: Analyzing trace with hash -158174915, now seen corresponding path program 1 times [2019-10-15 03:32:03,910 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:03,911 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730708389] [2019-10-15 03:32:03,911 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:03,912 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:03,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:04,423 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 03:32:04,425 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730708389] [2019-10-15 03:32:04,426 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:32:04,427 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:32:04,428 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811974186] [2019-10-15 03:32:04,435 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:04,436 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:04,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:04,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:04,457 INFO L87 Difference]: Start difference. First operand 198 states. Second operand 4 states. [2019-10-15 03:32:05,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:05,107 INFO L93 Difference]: Finished difference Result 555 states and 786 transitions. [2019-10-15 03:32:05,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:05,110 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2019-10-15 03:32:05,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:05,142 INFO L225 Difference]: With dead ends: 555 [2019-10-15 03:32:05,142 INFO L226 Difference]: Without dead ends: 361 [2019-10-15 03:32:05,154 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 03:32:05,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2019-10-15 03:32:05,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 356. [2019-10-15 03:32:05,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2019-10-15 03:32:05,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 470 transitions. [2019-10-15 03:32:05,277 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 470 transitions. Word has length 92 [2019-10-15 03:32:05,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:05,278 INFO L462 AbstractCegarLoop]: Abstraction has 356 states and 470 transitions. [2019-10-15 03:32:05,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:05,278 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 470 transitions. [2019-10-15 03:32:05,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-15 03:32:05,283 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:05,284 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, 1, 1, 1, 1] [2019-10-15 03:32:05,284 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:05,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:05,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1661551004, now seen corresponding path program 1 times [2019-10-15 03:32:05,285 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:05,285 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247133975] [2019-10-15 03:32:05,285 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:05,286 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:05,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:05,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:05,416 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 03:32:05,417 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247133975] [2019-10-15 03:32:05,418 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:32:05,418 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:32:05,424 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076604316] [2019-10-15 03:32:05,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:05,427 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:05,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:05,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:05,428 INFO L87 Difference]: Start difference. First operand 356 states and 470 transitions. Second operand 4 states. [2019-10-15 03:32:05,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:05,831 INFO L93 Difference]: Finished difference Result 1027 states and 1436 transitions. [2019-10-15 03:32:05,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:05,832 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2019-10-15 03:32:05,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:05,838 INFO L225 Difference]: With dead ends: 1027 [2019-10-15 03:32:05,838 INFO L226 Difference]: Without dead ends: 687 [2019-10-15 03:32:05,841 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 03:32:05,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2019-10-15 03:32:05,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 681. [2019-10-15 03:32:05,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 681 states. [2019-10-15 03:32:05,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 897 transitions. [2019-10-15 03:32:05,911 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 897 transitions. Word has length 92 [2019-10-15 03:32:05,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:05,911 INFO L462 AbstractCegarLoop]: Abstraction has 681 states and 897 transitions. [2019-10-15 03:32:05,911 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:05,912 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 897 transitions. [2019-10-15 03:32:05,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-15 03:32:05,915 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:05,915 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, 1, 1, 1, 1] [2019-10-15 03:32:05,915 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:05,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:05,916 INFO L82 PathProgramCache]: Analyzing trace with hash 553422365, now seen corresponding path program 1 times [2019-10-15 03:32:05,916 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:05,916 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408535712] [2019-10-15 03:32:05,917 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:05,917 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:05,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:05,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:06,047 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 03:32:06,048 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408535712] [2019-10-15 03:32:06,048 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:32:06,048 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:32:06,048 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94055601] [2019-10-15 03:32:06,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:06,051 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:06,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:06,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:06,052 INFO L87 Difference]: Start difference. First operand 681 states and 897 transitions. Second operand 4 states. [2019-10-15 03:32:06,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:06,505 INFO L93 Difference]: Finished difference Result 1994 states and 2783 transitions. [2019-10-15 03:32:06,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:06,506 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2019-10-15 03:32:06,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:06,520 INFO L225 Difference]: With dead ends: 1994 [2019-10-15 03:32:06,520 INFO L226 Difference]: Without dead ends: 1329 [2019-10-15 03:32:06,524 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 03:32:06,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2019-10-15 03:32:06,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1321. [2019-10-15 03:32:06,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1321 states. [2019-10-15 03:32:06,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 1735 transitions. [2019-10-15 03:32:06,640 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 1735 transitions. Word has length 92 [2019-10-15 03:32:06,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:06,641 INFO L462 AbstractCegarLoop]: Abstraction has 1321 states and 1735 transitions. [2019-10-15 03:32:06,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:06,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 1735 transitions. [2019-10-15 03:32:06,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-15 03:32:06,649 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:06,650 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, 1, 1, 1, 1] [2019-10-15 03:32:06,651 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:06,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:06,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1986257084, now seen corresponding path program 1 times [2019-10-15 03:32:06,651 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:06,652 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163291549] [2019-10-15 03:32:06,652 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:06,652 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:06,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:06,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:06,756 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 03:32:06,757 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163291549] [2019-10-15 03:32:06,757 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:32:06,757 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:32:06,757 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811922744] [2019-10-15 03:32:06,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:06,758 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:06,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:06,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:06,759 INFO L87 Difference]: Start difference. First operand 1321 states and 1735 transitions. Second operand 4 states. [2019-10-15 03:32:07,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:07,211 INFO L93 Difference]: Finished difference Result 3898 states and 5439 transitions. [2019-10-15 03:32:07,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:07,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2019-10-15 03:32:07,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:07,231 INFO L225 Difference]: With dead ends: 3898 [2019-10-15 03:32:07,231 INFO L226 Difference]: Without dead ends: 2593 [2019-10-15 03:32:07,240 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 03:32:07,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2593 states. [2019-10-15 03:32:07,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2593 to 2581. [2019-10-15 03:32:07,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2581 states. [2019-10-15 03:32:07,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2581 states to 2581 states and 3385 transitions. [2019-10-15 03:32:07,496 INFO L78 Accepts]: Start accepts. Automaton has 2581 states and 3385 transitions. Word has length 92 [2019-10-15 03:32:07,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:07,497 INFO L462 AbstractCegarLoop]: Abstraction has 2581 states and 3385 transitions. [2019-10-15 03:32:07,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:07,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2581 states and 3385 transitions. [2019-10-15 03:32:07,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-15 03:32:07,498 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:07,499 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, 1, 1, 1, 1] [2019-10-15 03:32:07,499 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:07,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:07,499 INFO L82 PathProgramCache]: Analyzing trace with hash 313739453, now seen corresponding path program 1 times [2019-10-15 03:32:07,500 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:07,500 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369112277] [2019-10-15 03:32:07,500 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:07,500 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:07,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:07,578 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 03:32:07,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369112277] [2019-10-15 03:32:07,579 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:32:07,579 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:32:07,579 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369000372] [2019-10-15 03:32:07,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:32:07,580 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:07,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:32:07,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:32:07,581 INFO L87 Difference]: Start difference. First operand 2581 states and 3385 transitions. Second operand 3 states. [2019-10-15 03:32:07,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:07,868 INFO L93 Difference]: Finished difference Result 7594 states and 10709 transitions. [2019-10-15 03:32:07,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:32:07,869 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2019-10-15 03:32:07,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:07,907 INFO L225 Difference]: With dead ends: 7594 [2019-10-15 03:32:07,908 INFO L226 Difference]: Without dead ends: 5029 [2019-10-15 03:32:07,928 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 03:32:07,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5029 states. [2019-10-15 03:32:08,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5029 to 5013. [2019-10-15 03:32:08,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5013 states. [2019-10-15 03:32:08,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5013 states to 5013 states and 6892 transitions. [2019-10-15 03:32:08,381 INFO L78 Accepts]: Start accepts. Automaton has 5013 states and 6892 transitions. Word has length 92 [2019-10-15 03:32:08,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:08,383 INFO L462 AbstractCegarLoop]: Abstraction has 5013 states and 6892 transitions. [2019-10-15 03:32:08,383 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:32:08,383 INFO L276 IsEmpty]: Start isEmpty. Operand 5013 states and 6892 transitions. [2019-10-15 03:32:08,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-15 03:32:08,394 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:08,395 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, 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] [2019-10-15 03:32:08,395 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:08,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:08,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1840732258, now seen corresponding path program 1 times [2019-10-15 03:32:08,396 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:08,396 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597817064] [2019-10-15 03:32:08,396 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:08,396 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:08,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-15 03:32:08,555 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597817064] [2019-10-15 03:32:08,556 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:32:08,556 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:32:08,556 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908239713] [2019-10-15 03:32:08,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:08,557 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:08,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:08,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:08,558 INFO L87 Difference]: Start difference. First operand 5013 states and 6892 transitions. Second operand 4 states. [2019-10-15 03:32:09,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:09,153 INFO L93 Difference]: Finished difference Result 13417 states and 19773 transitions. [2019-10-15 03:32:09,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:09,154 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 168 [2019-10-15 03:32:09,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:09,239 INFO L225 Difference]: With dead ends: 13417 [2019-10-15 03:32:09,240 INFO L226 Difference]: Without dead ends: 8421 [2019-10-15 03:32:09,291 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 03:32:09,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8421 states. [2019-10-15 03:32:09,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8421 to 7423. [2019-10-15 03:32:09,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7423 states. [2019-10-15 03:32:09,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7423 states to 7423 states and 10809 transitions. [2019-10-15 03:32:09,998 INFO L78 Accepts]: Start accepts. Automaton has 7423 states and 10809 transitions. Word has length 168 [2019-10-15 03:32:10,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:10,001 INFO L462 AbstractCegarLoop]: Abstraction has 7423 states and 10809 transitions. [2019-10-15 03:32:10,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:10,001 INFO L276 IsEmpty]: Start isEmpty. Operand 7423 states and 10809 transitions. [2019-10-15 03:32:10,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-10-15 03:32:10,045 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:10,046 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:32:10,046 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:10,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:10,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1640947664, now seen corresponding path program 1 times [2019-10-15 03:32:10,047 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:10,047 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389503759] [2019-10-15 03:32:10,047 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:10,047 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:10,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:10,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:10,224 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2019-10-15 03:32:10,225 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389503759] [2019-10-15 03:32:10,225 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138305678] [2019-10-15 03:32:10,225 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 03:32:10,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:10,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 1558 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:32:10,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-15 03:32:10,719 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-10-15 03:32:11,027 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:32:11,027 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5] total 6 [2019-10-15 03:32:11,028 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796055495] [2019-10-15 03:32:11,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:11,029 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:11,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:11,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:32:11,030 INFO L87 Difference]: Start difference. First operand 7423 states and 10809 transitions. Second operand 4 states. [2019-10-15 03:32:12,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:12,008 INFO L93 Difference]: Finished difference Result 21996 states and 35516 transitions. [2019-10-15 03:32:12,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:12,008 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 230 [2019-10-15 03:32:12,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:12,120 INFO L225 Difference]: With dead ends: 21996 [2019-10-15 03:32:12,120 INFO L226 Difference]: Without dead ends: 14589 [2019-10-15 03:32:12,218 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:32:12,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14589 states. [2019-10-15 03:32:13,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14589 to 14447. [2019-10-15 03:32:13,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14447 states. [2019-10-15 03:32:13,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14447 states to 14447 states and 21173 transitions. [2019-10-15 03:32:13,900 INFO L78 Accepts]: Start accepts. Automaton has 14447 states and 21173 transitions. Word has length 230 [2019-10-15 03:32:13,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:13,901 INFO L462 AbstractCegarLoop]: Abstraction has 14447 states and 21173 transitions. [2019-10-15 03:32:13,901 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:13,901 INFO L276 IsEmpty]: Start isEmpty. Operand 14447 states and 21173 transitions. [2019-10-15 03:32:13,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-10-15 03:32:13,966 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:13,967 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:32:14,183 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:14,184 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:14,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:14,184 INFO L82 PathProgramCache]: Analyzing trace with hash 995342055, now seen corresponding path program 1 times [2019-10-15 03:32:14,185 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:14,185 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083451629] [2019-10-15 03:32:14,186 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:14,186 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:14,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:14,321 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-10-15 03:32:14,322 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083451629] [2019-10-15 03:32:14,322 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337674529] [2019-10-15 03:32:14,322 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 03:32:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:14,675 INFO L256 TraceCheckSpWp]: Trace formula consists of 1558 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:32:14,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-15 03:32:14,872 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:15,193 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-10-15 03:32:15,193 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:32:15,194 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5] total 6 [2019-10-15 03:32:15,194 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516407929] [2019-10-15 03:32:15,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:15,195 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:15,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:15,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:32:15,196 INFO L87 Difference]: Start difference. First operand 14447 states and 21173 transitions. Second operand 4 states. [2019-10-15 03:32:16,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:16,813 INFO L93 Difference]: Finished difference Result 42827 states and 70668 transitions. [2019-10-15 03:32:16,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:16,813 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 230 [2019-10-15 03:32:16,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:16,997 INFO L225 Difference]: With dead ends: 42827 [2019-10-15 03:32:16,997 INFO L226 Difference]: Without dead ends: 28396 [2019-10-15 03:32:17,219 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:32:17,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28396 states. [2019-10-15 03:32:18,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28396 to 28126. [2019-10-15 03:32:18,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28126 states. [2019-10-15 03:32:18,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28126 states to 28126 states and 41971 transitions. [2019-10-15 03:32:18,896 INFO L78 Accepts]: Start accepts. Automaton has 28126 states and 41971 transitions. Word has length 230 [2019-10-15 03:32:18,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:18,897 INFO L462 AbstractCegarLoop]: Abstraction has 28126 states and 41971 transitions. [2019-10-15 03:32:18,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:18,897 INFO L276 IsEmpty]: Start isEmpty. Operand 28126 states and 41971 transitions. [2019-10-15 03:32:19,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2019-10-15 03:32:19,123 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:19,123 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:32:19,329 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:19,330 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:19,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:19,331 INFO L82 PathProgramCache]: Analyzing trace with hash -527420944, now seen corresponding path program 1 times [2019-10-15 03:32:19,331 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:19,332 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251148522] [2019-10-15 03:32:19,332 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:19,332 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:19,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:19,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:20,613 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2019-10-15 03:32:20,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251148522] [2019-10-15 03:32:20,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808387075] [2019-10-15 03:32:20,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:20,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 1638 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:32:20,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:20,969 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-15 03:32:20,970 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:21,206 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2019-10-15 03:32:21,206 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:32:21,206 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 3] total 10 [2019-10-15 03:32:21,207 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89282509] [2019-10-15 03:32:21,208 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:32:21,209 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:21,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:32:21,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:32:21,210 INFO L87 Difference]: Start difference. First operand 28126 states and 41971 transitions. Second operand 3 states. [2019-10-15 03:32:23,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:23,312 INFO L93 Difference]: Finished difference Result 53541 states and 83204 transitions. [2019-10-15 03:32:23,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:32:23,312 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 248 [2019-10-15 03:32:23,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:23,561 INFO L225 Difference]: With dead ends: 53541 [2019-10-15 03:32:23,562 INFO L226 Difference]: Without dead ends: 39505 [2019-10-15 03:32:23,845 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:32:23,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39505 states. [2019-10-15 03:32:26,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39505 to 33138. [2019-10-15 03:32:26,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33138 states. [2019-10-15 03:32:26,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33138 states to 33138 states and 49725 transitions. [2019-10-15 03:32:26,777 INFO L78 Accepts]: Start accepts. Automaton has 33138 states and 49725 transitions. Word has length 248 [2019-10-15 03:32:26,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:26,778 INFO L462 AbstractCegarLoop]: Abstraction has 33138 states and 49725 transitions. [2019-10-15 03:32:26,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:32:26,778 INFO L276 IsEmpty]: Start isEmpty. Operand 33138 states and 49725 transitions. [2019-10-15 03:32:27,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2019-10-15 03:32:27,212 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:27,213 INFO L380 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:32:27,428 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:27,428 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:27,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:27,429 INFO L82 PathProgramCache]: Analyzing trace with hash -532704514, now seen corresponding path program 1 times [2019-10-15 03:32:27,429 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:27,430 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242585570] [2019-10-15 03:32:27,430 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:27,430 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:27,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 54 proven. 39 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-10-15 03:32:28,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242585570] [2019-10-15 03:32:28,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843572883] [2019-10-15 03:32:28,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:28,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:28,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 2158 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:32:28,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 190 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2019-10-15 03:32:28,793 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:29,181 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2019-10-15 03:32:29,181 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:32:29,181 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [7] total 9 [2019-10-15 03:32:29,182 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885042375] [2019-10-15 03:32:29,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:29,183 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:29,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:29,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-15 03:32:29,184 INFO L87 Difference]: Start difference. First operand 33138 states and 49725 transitions. Second operand 4 states.