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.03.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:27:03,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:27:03,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:27:03,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:27:03,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:27:03,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:27:03,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:27:03,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:27:03,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:27:03,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:27:03,200 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:27:03,201 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:27:03,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:27:03,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:27:03,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:27:03,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:27:03,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:27:03,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:27:03,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:27:03,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:27:03,211 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:27:03,212 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:27:03,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:27:03,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:27:03,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:27:03,217 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:27:03,217 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:27:03,218 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:27:03,218 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:27:03,219 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:27:03,219 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:27:03,220 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:27:03,221 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:27:03,222 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:27:03,223 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:27:03,223 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:27:03,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:27:03,224 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:27:03,224 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:27:03,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:27:03,226 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:27:03,227 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 23:27:03,241 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:27:03,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:27:03,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:27:03,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:27:03,243 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:27:03,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:27:03,243 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:27:03,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:27:03,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:27:03,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:27:03,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:27:03,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:27:03,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:27:03,244 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:27:03,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:27:03,245 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:27:03,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:27:03,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:27:03,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:27:03,245 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:27:03,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:27:03,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:27:03,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:27:03,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:27:03,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:27:03,247 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:27:03,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:27:03,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:27:03,247 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 [2019-10-13 23:27:03,511 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:27:03,524 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:27:03,528 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:27:03,529 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:27:03,530 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:27:03,530 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.03.cil-2.c [2019-10-13 23:27:03,589 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5d7ee10d/05682c43ce0d47158af497d12af42168/FLAG3b63e2e4d [2019-10-13 23:27:04,063 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:27:04,064 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/token_ring.03.cil-2.c [2019-10-13 23:27:04,074 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5d7ee10d/05682c43ce0d47158af497d12af42168/FLAG3b63e2e4d [2019-10-13 23:27:04,438 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5d7ee10d/05682c43ce0d47158af497d12af42168 [2019-10-13 23:27:04,450 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:27:04,452 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:27:04,453 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:27:04,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:27:04,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:27:04,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:27:04" (1/1) ... [2019-10-13 23:27:04,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4563917c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:04, skipping insertion in model container [2019-10-13 23:27:04,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:27:04" (1/1) ... [2019-10-13 23:27:04,472 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:27:04,527 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:27:04,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:27:04,902 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:27:05,081 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:27:05,107 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:27:05,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:05 WrapperNode [2019-10-13 23:27:05,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:27:05,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:27:05,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:27:05,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:27:05,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:05" (1/1) ... [2019-10-13 23:27:05,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:05" (1/1) ... [2019-10-13 23:27:05,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:05" (1/1) ... [2019-10-13 23:27:05,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:05" (1/1) ... [2019-10-13 23:27:05,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:05" (1/1) ... [2019-10-13 23:27:05,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:05" (1/1) ... [2019-10-13 23:27:05,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:05" (1/1) ... [2019-10-13 23:27:05,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:27:05,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:27:05,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:27:05,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:27:05,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:27:05,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:27:05,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:27:05,224 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-13 23:27:05,224 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-10-13 23:27:05,224 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-10-13 23:27:05,225 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2019-10-13 23:27:05,225 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2019-10-13 23:27:05,225 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-10-13 23:27:05,225 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-10-13 23:27:05,225 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2019-10-13 23:27:05,226 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2019-10-13 23:27:05,226 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-10-13 23:27:05,226 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-13 23:27:05,226 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-13 23:27:05,226 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-13 23:27:05,226 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-10-13 23:27:05,227 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-10-13 23:27:05,227 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-10-13 23:27:05,227 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-10-13 23:27:05,227 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-10-13 23:27:05,227 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-10-13 23:27:05,228 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-13 23:27:05,228 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-13 23:27:05,228 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-13 23:27:05,228 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:27:05,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:27:05,228 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-13 23:27:05,229 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-10-13 23:27:05,229 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-10-13 23:27:05,229 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2019-10-13 23:27:05,229 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2019-10-13 23:27:05,229 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-10-13 23:27:05,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:27:05,229 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-10-13 23:27:05,230 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-10-13 23:27:05,230 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2019-10-13 23:27:05,230 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2019-10-13 23:27:05,230 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-10-13 23:27:05,230 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-13 23:27:05,230 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-13 23:27:05,231 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-13 23:27:05,231 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-10-13 23:27:05,231 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-10-13 23:27:05,231 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-10-13 23:27:05,231 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-10-13 23:27:05,231 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-10-13 23:27:05,231 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-13 23:27:05,232 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-13 23:27:05,232 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-13 23:27:05,232 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:27:05,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:27:05,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:27:06,295 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:27:06,295 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-13 23:27:06,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:27:06 BoogieIcfgContainer [2019-10-13 23:27:06,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:27:06,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:27:06,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:27:06,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:27:06,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:27:04" (1/3) ... [2019-10-13 23:27:06,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@609a6abc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:27:06, skipping insertion in model container [2019-10-13 23:27:06,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:05" (2/3) ... [2019-10-13 23:27:06,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@609a6abc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:27:06, skipping insertion in model container [2019-10-13 23:27:06,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:27:06" (3/3) ... [2019-10-13 23:27:06,309 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.03.cil-2.c [2019-10-13 23:27:06,318 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:27:06,327 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:27:06,338 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:27:06,364 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:27:06,365 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:27:06,365 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:27:06,365 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:27:06,366 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:27:06,366 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:27:06,366 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:27:06,366 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:27:06,388 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states. [2019-10-13 23:27:06,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-13 23:27:06,399 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:06,400 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] [2019-10-13 23:27:06,402 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:06,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:06,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1525413467, now seen corresponding path program 1 times [2019-10-13 23:27:06,417 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:06,417 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800093789] [2019-10-13 23:27:06,418 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:06,418 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:06,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:27:06,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800093789] [2019-10-13 23:27:06,775 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:06,776 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:27:06,777 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016573959] [2019-10-13 23:27:06,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:27:06,783 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:06,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:27:06,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:27:06,805 INFO L87 Difference]: Start difference. First operand 142 states. Second operand 3 states. [2019-10-13 23:27:06,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:06,934 INFO L93 Difference]: Finished difference Result 384 states and 529 transitions. [2019-10-13 23:27:06,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:27:06,938 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2019-10-13 23:27:06,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:06,954 INFO L225 Difference]: With dead ends: 384 [2019-10-13 23:27:06,954 INFO L226 Difference]: Without dead ends: 246 [2019-10-13 23:27:06,960 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 [2019-10-13 23:27:06,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2019-10-13 23:27:07,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2019-10-13 23:27:07,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2019-10-13 23:27:07,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 326 transitions. [2019-10-13 23:27:07,058 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 326 transitions. Word has length 70 [2019-10-13 23:27:07,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:07,059 INFO L462 AbstractCegarLoop]: Abstraction has 245 states and 326 transitions. [2019-10-13 23:27:07,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:27:07,059 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 326 transitions. [2019-10-13 23:27:07,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-13 23:27:07,065 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:07,066 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:07,066 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:07,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:07,067 INFO L82 PathProgramCache]: Analyzing trace with hash 792150009, now seen corresponding path program 1 times [2019-10-13 23:27:07,067 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:07,067 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303779236] [2019-10-13 23:27:07,068 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:07,068 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:07,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 23:27:07,290 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303779236] [2019-10-13 23:27:07,291 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:07,291 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:27:07,291 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408125026] [2019-10-13 23:27:07,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:07,294 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:07,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:07,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:07,295 INFO L87 Difference]: Start difference. First operand 245 states and 326 transitions. Second operand 4 states. [2019-10-13 23:27:07,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:07,433 INFO L93 Difference]: Finished difference Result 632 states and 884 transitions. [2019-10-13 23:27:07,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:07,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 121 [2019-10-13 23:27:07,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:07,441 INFO L225 Difference]: With dead ends: 632 [2019-10-13 23:27:07,441 INFO L226 Difference]: Without dead ends: 404 [2019-10-13 23:27:07,444 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 [2019-10-13 23:27:07,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2019-10-13 23:27:07,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 365. [2019-10-13 23:27:07,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2019-10-13 23:27:07,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 514 transitions. [2019-10-13 23:27:07,532 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 514 transitions. Word has length 121 [2019-10-13 23:27:07,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:07,533 INFO L462 AbstractCegarLoop]: Abstraction has 365 states and 514 transitions. [2019-10-13 23:27:07,533 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:07,533 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 514 transitions. [2019-10-13 23:27:07,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-13 23:27:07,539 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:07,539 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, 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] [2019-10-13 23:27:07,540 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:07,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:07,540 INFO L82 PathProgramCache]: Analyzing trace with hash 2121133127, now seen corresponding path program 1 times [2019-10-13 23:27:07,541 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:07,541 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390687386] [2019-10-13 23:27:07,541 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:07,541 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:07,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:07,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:07,737 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-10-13 23:27:07,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390687386] [2019-10-13 23:27:07,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865749509] [2019-10-13 23:27:07,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:07,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:07,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:27:08,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:08,056 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 23:27:08,057 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:08,313 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-13 23:27:08,314 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:27:08,315 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-13 23:27:08,315 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132280202] [2019-10-13 23:27:08,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:08,319 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:08,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:08,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:27:08,320 INFO L87 Difference]: Start difference. First operand 365 states and 514 transitions. Second operand 4 states. [2019-10-13 23:27:08,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:08,613 INFO L93 Difference]: Finished difference Result 1047 states and 1617 transitions. [2019-10-13 23:27:08,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:08,613 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2019-10-13 23:27:08,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:08,628 INFO L225 Difference]: With dead ends: 1047 [2019-10-13 23:27:08,629 INFO L226 Difference]: Without dead ends: 698 [2019-10-13 23:27:08,633 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:27:08,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2019-10-13 23:27:08,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 677. [2019-10-13 23:27:08,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 677 states. [2019-10-13 23:27:08,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 944 transitions. [2019-10-13 23:27:08,719 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 944 transitions. Word has length 162 [2019-10-13 23:27:08,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:08,722 INFO L462 AbstractCegarLoop]: Abstraction has 677 states and 944 transitions. [2019-10-13 23:27:08,722 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:08,722 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 944 transitions. [2019-10-13 23:27:08,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-13 23:27:08,731 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:08,732 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, 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] [2019-10-13 23:27:08,939 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:08,939 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:08,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:08,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1593060905, now seen corresponding path program 1 times [2019-10-13 23:27:08,940 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:08,940 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372941931] [2019-10-13 23:27:08,941 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:08,941 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:08,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-13 23:27:09,113 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372941931] [2019-10-13 23:27:09,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577430987] [2019-10-13 23:27:09,115 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 [2019-10-13 23:27:09,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:09,283 INFO L256 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:27:09,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:09,323 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 23:27:09,324 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:09,585 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-13 23:27:09,585 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:27:09,586 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-13 23:27:09,586 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408305773] [2019-10-13 23:27:09,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:09,587 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:09,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:09,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:27:09,587 INFO L87 Difference]: Start difference. First operand 677 states and 944 transitions. Second operand 4 states. [2019-10-13 23:27:09,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:09,860 INFO L93 Difference]: Finished difference Result 1968 states and 3001 transitions. [2019-10-13 23:27:09,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:09,861 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2019-10-13 23:27:09,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:09,870 INFO L225 Difference]: With dead ends: 1968 [2019-10-13 23:27:09,871 INFO L226 Difference]: Without dead ends: 1307 [2019-10-13 23:27:09,876 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:27:09,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2019-10-13 23:27:09,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1278. [2019-10-13 23:27:09,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1278 states. [2019-10-13 23:27:09,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 1760 transitions. [2019-10-13 23:27:09,977 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 1760 transitions. Word has length 162 [2019-10-13 23:27:09,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:09,978 INFO L462 AbstractCegarLoop]: Abstraction has 1278 states and 1760 transitions. [2019-10-13 23:27:09,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:09,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 1760 transitions. [2019-10-13 23:27:09,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-13 23:27:09,984 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:09,984 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, 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] [2019-10-13 23:27:10,188 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:10,189 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:10,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:10,189 INFO L82 PathProgramCache]: Analyzing trace with hash -2050703469, now seen corresponding path program 1 times [2019-10-13 23:27:10,189 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:10,190 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539591058] [2019-10-13 23:27:10,190 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:10,190 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:10,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:10,287 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-13 23:27:10,287 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539591058] [2019-10-13 23:27:10,287 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518673475] [2019-10-13 23:27:10,288 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 [2019-10-13 23:27:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:10,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:27:10,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 23:27:10,535 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-13 23:27:10,697 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:27:10,697 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-13 23:27:10,698 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282124231] [2019-10-13 23:27:10,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:10,699 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:10,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:10,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:27:10,699 INFO L87 Difference]: Start difference. First operand 1278 states and 1760 transitions. Second operand 4 states. [2019-10-13 23:27:11,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:11,065 INFO L93 Difference]: Finished difference Result 3740 states and 5633 transitions. [2019-10-13 23:27:11,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:11,066 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2019-10-13 23:27:11,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:11,085 INFO L225 Difference]: With dead ends: 3740 [2019-10-13 23:27:11,086 INFO L226 Difference]: Without dead ends: 2478 [2019-10-13 23:27:11,099 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:27:11,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2019-10-13 23:27:11,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 2433. [2019-10-13 23:27:11,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2433 states. [2019-10-13 23:27:11,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 3310 transitions. [2019-10-13 23:27:11,311 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 3310 transitions. Word has length 162 [2019-10-13 23:27:11,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:11,311 INFO L462 AbstractCegarLoop]: Abstraction has 2433 states and 3310 transitions. [2019-10-13 23:27:11,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:11,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 3310 transitions. [2019-10-13 23:27:11,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-13 23:27:11,324 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:11,324 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, 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] [2019-10-13 23:27:11,529 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:11,529 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:11,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:11,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1445260331, now seen corresponding path program 1 times [2019-10-13 23:27:11,530 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:11,530 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552475682] [2019-10-13 23:27:11,530 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:11,531 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:11,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:11,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:11,634 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-10-13 23:27:11,634 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552475682] [2019-10-13 23:27:11,634 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550326961] [2019-10-13 23:27:11,635 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 [2019-10-13 23:27:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:11,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 23:27:11,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 23:27:11,879 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:12,092 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-10-13 23:27:12,092 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:27:12,093 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 3] total 10 [2019-10-13 23:27:12,093 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845768288] [2019-10-13 23:27:12,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:27:12,094 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:12,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:27:12,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:27:12,094 INFO L87 Difference]: Start difference. First operand 2433 states and 3310 transitions. Second operand 3 states. [2019-10-13 23:27:12,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:12,279 INFO L93 Difference]: Finished difference Result 4518 states and 6297 transitions. [2019-10-13 23:27:12,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:27:12,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 177 [2019-10-13 23:27:12,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:12,303 INFO L225 Difference]: With dead ends: 4518 [2019-10-13 23:27:12,303 INFO L226 Difference]: Without dead ends: 3315 [2019-10-13 23:27:12,314 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:27:12,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2019-10-13 23:27:12,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 2793. [2019-10-13 23:27:12,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2793 states. [2019-10-13 23:27:12,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2793 states to 2793 states and 3820 transitions. [2019-10-13 23:27:12,520 INFO L78 Accepts]: Start accepts. Automaton has 2793 states and 3820 transitions. Word has length 177 [2019-10-13 23:27:12,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:12,520 INFO L462 AbstractCegarLoop]: Abstraction has 2793 states and 3820 transitions. [2019-10-13 23:27:12,520 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:27:12,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2793 states and 3820 transitions. [2019-10-13 23:27:12,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-13 23:27:12,533 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:12,534 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, 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] [2019-10-13 23:27:12,738 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:12,739 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:12,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:12,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1912388343, now seen corresponding path program 1 times [2019-10-13 23:27:12,739 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:12,740 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413153146] [2019-10-13 23:27:12,740 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:12,740 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:12,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:12,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:12,913 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-10-13 23:27:12,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413153146] [2019-10-13 23:27:12,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910368691] [2019-10-13 23:27:12,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:13,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:13,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 23:27:13,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:13,180 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 23:27:13,180 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-10-13 23:27:13,384 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:27:13,384 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 3] total 10 [2019-10-13 23:27:13,385 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171678293] [2019-10-13 23:27:13,385 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:27:13,385 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:13,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:27:13,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:27:13,386 INFO L87 Difference]: Start difference. First operand 2793 states and 3820 transitions. Second operand 3 states. [2019-10-13 23:27:13,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:13,560 INFO L93 Difference]: Finished difference Result 5114 states and 7175 transitions. [2019-10-13 23:27:13,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:27:13,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 177 [2019-10-13 23:27:13,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:13,586 INFO L225 Difference]: With dead ends: 5114 [2019-10-13 23:27:13,587 INFO L226 Difference]: Without dead ends: 3758 [2019-10-13 23:27:13,599 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:27:13,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3758 states. [2019-10-13 23:27:13,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3758 to 3296. [2019-10-13 23:27:13,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3296 states. [2019-10-13 23:27:13,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3296 states to 3296 states and 4520 transitions. [2019-10-13 23:27:13,851 INFO L78 Accepts]: Start accepts. Automaton has 3296 states and 4520 transitions. Word has length 177 [2019-10-13 23:27:13,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:13,852 INFO L462 AbstractCegarLoop]: Abstraction has 3296 states and 4520 transitions. [2019-10-13 23:27:13,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:27:13,852 INFO L276 IsEmpty]: Start isEmpty. Operand 3296 states and 4520 transitions. [2019-10-13 23:27:13,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2019-10-13 23:27:13,866 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:13,866 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, 3, 3, 3, 3, 3, 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] [2019-10-13 23:27:14,071 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:14,073 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:14,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:14,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1945516746, now seen corresponding path program 1 times [2019-10-13 23:27:14,073 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:14,074 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616158889] [2019-10-13 23:27:14,074 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:14,074 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:14,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-10-13 23:27:14,210 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616158889] [2019-10-13 23:27:14,211 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092221449] [2019-10-13 23:27:14,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:14,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 1344 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 23:27:14,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:14,511 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2019-10-13 23:27:14,512 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:14,818 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2019-10-13 23:27:14,819 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:27:14,819 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [7] total 9 [2019-10-13 23:27:14,819 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237961322] [2019-10-13 23:27:14,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:14,822 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:14,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:14,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:27:14,828 INFO L87 Difference]: Start difference. First operand 3296 states and 4520 transitions. Second operand 4 states. [2019-10-13 23:27:15,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:15,129 INFO L93 Difference]: Finished difference Result 5418 states and 7528 transitions. [2019-10-13 23:27:15,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:15,130 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 244 [2019-10-13 23:27:15,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:15,161 INFO L225 Difference]: With dead ends: 5418 [2019-10-13 23:27:15,162 INFO L226 Difference]: Without dead ends: 3850 [2019-10-13 23:27:15,183 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 486 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:27:15,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2019-10-13 23:27:15,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 3850. [2019-10-13 23:27:15,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3850 states. [2019-10-13 23:27:15,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3850 states to 3850 states and 5105 transitions. [2019-10-13 23:27:15,421 INFO L78 Accepts]: Start accepts. Automaton has 3850 states and 5105 transitions. Word has length 244 [2019-10-13 23:27:15,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:15,422 INFO L462 AbstractCegarLoop]: Abstraction has 3850 states and 5105 transitions. [2019-10-13 23:27:15,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:15,423 INFO L276 IsEmpty]: Start isEmpty. Operand 3850 states and 5105 transitions. [2019-10-13 23:27:15,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2019-10-13 23:27:15,440 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:15,440 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, 3, 3, 3, 3, 3, 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] [2019-10-13 23:27:15,653 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:15,653 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:15,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:15,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1965988107, now seen corresponding path program 1 times [2019-10-13 23:27:15,654 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:15,654 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079911742] [2019-10-13 23:27:15,654 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:15,655 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:15,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:15,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:15,843 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-10-13 23:27:15,844 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079911742] [2019-10-13 23:27:15,844 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074808] [2019-10-13 23:27:15,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:16,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:16,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 1344 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 23:27:16,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-13 23:27:16,202 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 43 proven. 6 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2019-10-13 23:27:16,502 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:27:16,502 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 4] total 12 [2019-10-13 23:27:16,502 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807337055] [2019-10-13 23:27:16,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 23:27:16,503 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:16,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 23:27:16,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:27:16,504 INFO L87 Difference]: Start difference. First operand 3850 states and 5105 transitions. Second operand 6 states. [2019-10-13 23:27:17,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:17,212 INFO L93 Difference]: Finished difference Result 6223 states and 8469 transitions. [2019-10-13 23:27:17,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 23:27:17,212 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 244 [2019-10-13 23:27:17,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:17,238 INFO L225 Difference]: With dead ends: 6223 [2019-10-13 23:27:17,238 INFO L226 Difference]: Without dead ends: 4187 [2019-10-13 23:27:17,255 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 490 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2019-10-13 23:27:17,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4187 states. [2019-10-13 23:27:17,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4187 to 4187. [2019-10-13 23:27:17,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4187 states. [2019-10-13 23:27:17,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4187 states to 4187 states and 5447 transitions. [2019-10-13 23:27:17,540 INFO L78 Accepts]: Start accepts. Automaton has 4187 states and 5447 transitions. Word has length 244 [2019-10-13 23:27:17,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:17,544 INFO L462 AbstractCegarLoop]: Abstraction has 4187 states and 5447 transitions. [2019-10-13 23:27:17,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 23:27:17,545 INFO L276 IsEmpty]: Start isEmpty. Operand 4187 states and 5447 transitions. [2019-10-13 23:27:17,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2019-10-13 23:27:17,567 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:17,567 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:17,781 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:17,782 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:17,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:17,783 INFO L82 PathProgramCache]: Analyzing trace with hash 2043125902, now seen corresponding path program 1 times [2019-10-13 23:27:17,783 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:17,784 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711909156] [2019-10-13 23:27:17,784 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:17,784 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:17,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2019-10-13 23:27:17,924 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711909156] [2019-10-13 23:27:17,924 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895780646] [2019-10-13 23:27:17,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:18,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:18,191 INFO L256 TraceCheckSpWp]: Trace formula consists of 1342 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-13 23:27:18,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:18,346 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 139 proven. 4 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-10-13 23:27:18,347 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:18,605 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:27:18,723 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:27:18,726 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:27:18,748 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:27:18,822 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-10-13 23:27:18,823 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1127709660] [2019-10-13 23:27:18,884 INFO L162 IcfgInterpreter]: Started Sifa with 110 locations of interest [2019-10-13 23:27:18,884 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 23:27:18,893 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 23:27:18,903 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 23:27:18,903 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 23:27:19,263 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 67 for LOIs [2019-10-13 23:27:19,308 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 113 for LOIs [2019-10-13 23:27:19,993 INFO L199 IcfgInterpreter]: Interpreting procedure init_model with input of size 69 for LOIs [2019-10-13 23:27:20,116 INFO L199 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 122 for LOIs [2019-10-13 23:27:23,599 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-10-13 23:27:23,638 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-10-13 23:27:24,139 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:24,139 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε at de.uni_freiburg.informatik.ultimate.lib.sifa.PriorityWorklist.add(PriorityWorklist.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.lambda$2(DagInterpreter.java:135) at java.lang.Iterable.forEach(Iterable.java:75) at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:135) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) ... 21 more [2019-10-13 23:27:24,147 INFO L168 Benchmark]: Toolchain (without parser) took 19694.41 ms. Allocated memory was 138.4 MB in the beginning and 913.3 MB in the end (delta: 774.9 MB). Free memory was 101.3 MB in the beginning and 420.3 MB in the end (delta: -319.0 MB). Peak memory consumption was 455.9 MB. Max. memory is 7.1 GB. [2019-10-13 23:27:24,149 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 23:27:24,150 INFO L168 Benchmark]: CACSL2BoogieTranslator took 654.47 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 101.1 MB in the beginning and 178.6 MB in the end (delta: -77.5 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. [2019-10-13 23:27:24,151 INFO L168 Benchmark]: Boogie Preprocessor took 56.03 ms. Allocated memory is still 203.4 MB. Free memory was 178.6 MB in the beginning and 175.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2019-10-13 23:27:24,151 INFO L168 Benchmark]: RCFGBuilder took 1135.64 ms. Allocated memory was 203.4 MB in the beginning and 235.9 MB in the end (delta: 32.5 MB). Free memory was 175.9 MB in the beginning and 204.6 MB in the end (delta: -28.7 MB). Peak memory consumption was 90.9 MB. Max. memory is 7.1 GB. [2019-10-13 23:27:24,152 INFO L168 Benchmark]: TraceAbstraction took 17843.45 ms. Allocated memory was 235.9 MB in the beginning and 913.3 MB in the end (delta: 677.4 MB). Free memory was 204.6 MB in the beginning and 420.3 MB in the end (delta: -215.7 MB). Peak memory consumption was 461.7 MB. Max. memory is 7.1 GB. [2019-10-13 23:27:24,156 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 654.47 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 101.1 MB in the beginning and 178.6 MB in the end (delta: -77.5 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 56.03 ms. Allocated memory is still 203.4 MB. Free memory was 178.6 MB in the beginning and 175.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1135.64 ms. Allocated memory was 203.4 MB in the beginning and 235.9 MB in the end (delta: 32.5 MB). Free memory was 175.9 MB in the beginning and 204.6 MB in the end (delta: -28.7 MB). Peak memory consumption was 90.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 17843.45 ms. Allocated memory was 235.9 MB in the beginning and 913.3 MB in the end (delta: 677.4 MB). Free memory was 204.6 MB in the beginning and 420.3 MB in the end (delta: -215.7 MB). Peak memory consumption was 461.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...