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.01.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:31:46,261 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:31:46,264 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:31:46,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:31:46,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:31:46,278 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:31:46,279 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:31:46,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:31:46,283 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:31:46,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:31:46,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:31:46,286 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:31:46,286 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:31:46,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:31:46,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:31:46,289 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:31:46,290 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:31:46,291 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:31:46,293 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:31:46,295 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:31:46,297 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:31:46,298 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:31:46,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:31:46,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:31:46,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:31:46,302 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:31:46,303 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:31:46,303 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:31:46,304 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:31:46,305 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:31:46,305 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:31:46,306 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:31:46,307 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:31:46,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:31:46,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:31:46,309 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:31:46,309 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:31:46,310 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:31:46,310 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:31:46,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:31:46,311 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:31:46,312 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 03:31:46,327 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:31:46,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:31:46,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:31:46,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:31:46,329 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:31:46,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:31:46,330 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:31:46,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:31:46,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:31:46,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:31:46,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:31:46,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:31:46,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:31:46,331 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:31:46,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:31:46,332 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:31:46,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:31:46,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:31:46,332 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:31:46,333 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:31:46,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:31:46,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:31:46,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:31:46,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:31:46,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:31:46,334 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:31:46,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:31:46,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:31:46,335 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:31:46,643 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:31:46,664 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:31:46,668 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:31:46,670 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:31:46,670 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:31:46,671 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.01.cil-2.c [2019-10-15 03:31:46,734 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82e5ef0ba/6341bb2c603c4986ad526fac34a52e71/FLAG22fcca5ab [2019-10-15 03:31:47,261 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:31:47,263 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/token_ring.01.cil-2.c [2019-10-15 03:31:47,272 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82e5ef0ba/6341bb2c603c4986ad526fac34a52e71/FLAG22fcca5ab [2019-10-15 03:31:47,571 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82e5ef0ba/6341bb2c603c4986ad526fac34a52e71 [2019-10-15 03:31:47,581 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:31:47,583 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:31:47,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:31:47,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:31:47,588 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:31:47,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:31:47" (1/1) ... [2019-10-15 03:31:47,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@760b8f94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:47, skipping insertion in model container [2019-10-15 03:31:47,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:31:47" (1/1) ... [2019-10-15 03:31:47,601 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:31:47,633 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:31:47,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:31:47,972 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:31:48,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:31:48,202 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:31:48,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:48 WrapperNode [2019-10-15 03:31:48,203 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:31:48,204 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:31:48,204 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:31:48,205 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:31:48,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:48" (1/1) ... [2019-10-15 03:31:48,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:48" (1/1) ... [2019-10-15 03:31:48,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:48" (1/1) ... [2019-10-15 03:31:48,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:48" (1/1) ... [2019-10-15 03:31:48,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:48" (1/1) ... [2019-10-15 03:31:48,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:48" (1/1) ... [2019-10-15 03:31:48,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:48" (1/1) ... [2019-10-15 03:31:48,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:31:48,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:31:48,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:31:48,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:31:48,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:31:48,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:31:48,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:31:48,342 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-15 03:31:48,342 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-10-15 03:31:48,342 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-10-15 03:31:48,342 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-10-15 03:31:48,342 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-10-15 03:31:48,342 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-10-15 03:31:48,342 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-15 03:31:48,343 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-15 03:31:48,343 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-15 03:31:48,343 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-10-15 03:31:48,343 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-10-15 03:31:48,343 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-10-15 03:31:48,343 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-10-15 03:31:48,344 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-10-15 03:31:48,344 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-10-15 03:31:48,344 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-15 03:31:48,344 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-15 03:31:48,344 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-15 03:31:48,344 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:31:48,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:31:48,345 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-15 03:31:48,345 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-10-15 03:31:48,345 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-10-15 03:31:48,345 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-10-15 03:31:48,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:31:48,346 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-10-15 03:31:48,346 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-10-15 03:31:48,346 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-10-15 03:31:48,346 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-15 03:31:48,346 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-15 03:31:48,346 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-15 03:31:48,346 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-10-15 03:31:48,346 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-10-15 03:31:48,347 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-10-15 03:31:48,347 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-10-15 03:31:48,347 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-10-15 03:31:48,347 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-15 03:31:48,347 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-15 03:31:48,347 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-15 03:31:48,347 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:31:48,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:31:48,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:31:49,205 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:31:49,206 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-15 03:31:49,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:31:49 BoogieIcfgContainer [2019-10-15 03:31:49,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:31:49,213 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:31:49,213 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:31:49,217 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:31:49,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:31:47" (1/3) ... [2019-10-15 03:31:49,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6635d71a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:31:49, skipping insertion in model container [2019-10-15 03:31:49,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:48" (2/3) ... [2019-10-15 03:31:49,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6635d71a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:31:49, skipping insertion in model container [2019-10-15 03:31:49,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:31:49" (3/3) ... [2019-10-15 03:31:49,231 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.01.cil-2.c [2019-10-15 03:31:49,243 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:31:49,254 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:31:49,265 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:31:49,299 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:31:49,300 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:31:49,300 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:31:49,300 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:31:49,300 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:31:49,301 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:31:49,301 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:31:49,301 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:31:49,332 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states. [2019-10-15 03:31:49,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-15 03:31:49,344 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:49,346 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] [2019-10-15 03:31:49,347 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:49,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:49,352 INFO L82 PathProgramCache]: Analyzing trace with hash 643454482, now seen corresponding path program 1 times [2019-10-15 03:31:49,360 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:49,361 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731042296] [2019-10-15 03:31:49,361 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:49,361 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:49,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:49,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:31:49,660 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731042296] [2019-10-15 03:31:49,661 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:49,661 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:31:49,662 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528513430] [2019-10-15 03:31:49,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:31:49,668 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:49,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:31:49,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:31:49,680 INFO L87 Difference]: Start difference. First operand 113 states. Second operand 4 states. [2019-10-15 03:31:50,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:50,060 INFO L93 Difference]: Finished difference Result 300 states and 406 transitions. [2019-10-15 03:31:50,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:31:50,061 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2019-10-15 03:31:50,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:50,079 INFO L225 Difference]: With dead ends: 300 [2019-10-15 03:31:50,079 INFO L226 Difference]: Without dead ends: 191 [2019-10-15 03:31:50,085 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:31:50,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-10-15 03:31:50,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 186. [2019-10-15 03:31:50,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-10-15 03:31:50,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 230 transitions. [2019-10-15 03:31:50,166 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 230 transitions. Word has length 57 [2019-10-15 03:31:50,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:50,167 INFO L462 AbstractCegarLoop]: Abstraction has 186 states and 230 transitions. [2019-10-15 03:31:50,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:31:50,167 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 230 transitions. [2019-10-15 03:31:50,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-15 03:31:50,170 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:50,170 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] [2019-10-15 03:31:50,171 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:50,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:50,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1029063149, now seen corresponding path program 1 times [2019-10-15 03:31:50,173 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:50,174 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687174652] [2019-10-15 03:31:50,174 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:50,174 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:50,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:50,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:50,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:31:50,355 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687174652] [2019-10-15 03:31:50,355 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:50,355 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:31:50,356 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274298275] [2019-10-15 03:31:50,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:31:50,358 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:50,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:31:50,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:50,358 INFO L87 Difference]: Start difference. First operand 186 states and 230 transitions. Second operand 3 states. [2019-10-15 03:31:50,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:50,444 INFO L93 Difference]: Finished difference Result 507 states and 665 transitions. [2019-10-15 03:31:50,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:31:50,447 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2019-10-15 03:31:50,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:50,459 INFO L225 Difference]: With dead ends: 507 [2019-10-15 03:31:50,459 INFO L226 Difference]: Without dead ends: 337 [2019-10-15 03:31:50,465 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:50,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2019-10-15 03:31:50,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 335. [2019-10-15 03:31:50,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2019-10-15 03:31:50,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 425 transitions. [2019-10-15 03:31:50,526 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 425 transitions. Word has length 57 [2019-10-15 03:31:50,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:50,527 INFO L462 AbstractCegarLoop]: Abstraction has 335 states and 425 transitions. [2019-10-15 03:31:50,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:31:50,527 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 425 transitions. [2019-10-15 03:31:50,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-15 03:31:50,531 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:50,532 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:31:50,532 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:50,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:50,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1706780877, now seen corresponding path program 1 times [2019-10-15 03:31:50,533 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:50,533 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268731533] [2019-10-15 03:31:50,533 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:50,533 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:50,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:50,660 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 03:31:50,661 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268731533] [2019-10-15 03:31:50,661 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:50,661 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:31:50,662 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094285265] [2019-10-15 03:31:50,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:31:50,664 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:50,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:31:50,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:31:50,665 INFO L87 Difference]: Start difference. First operand 335 states and 425 transitions. Second operand 4 states. [2019-10-15 03:31:50,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:50,796 INFO L93 Difference]: Finished difference Result 863 states and 1121 transitions. [2019-10-15 03:31:50,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:31:50,797 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2019-10-15 03:31:50,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:50,804 INFO L225 Difference]: With dead ends: 863 [2019-10-15 03:31:50,805 INFO L226 Difference]: Without dead ends: 545 [2019-10-15 03:31:50,808 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:31:50,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2019-10-15 03:31:50,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 463. [2019-10-15 03:31:50,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2019-10-15 03:31:50,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 591 transitions. [2019-10-15 03:31:50,906 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 591 transitions. Word has length 93 [2019-10-15 03:31:50,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:50,908 INFO L462 AbstractCegarLoop]: Abstraction has 463 states and 591 transitions. [2019-10-15 03:31:50,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:31:50,909 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 591 transitions. [2019-10-15 03:31:50,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-15 03:31:50,923 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:50,923 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:31:50,923 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:50,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:50,924 INFO L82 PathProgramCache]: Analyzing trace with hash 734950659, now seen corresponding path program 1 times [2019-10-15 03:31:50,926 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:50,926 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168701557] [2019-10-15 03:31:50,927 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:50,927 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:50,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:50,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-15 03:31:51,113 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168701557] [2019-10-15 03:31:51,114 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022379692] [2019-10-15 03:31:51,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:31:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:51,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:31:51,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:31:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 03:31:51,346 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:31:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-15 03:31:51,598 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:31:51,598 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [8] total 10 [2019-10-15 03:31:51,599 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026941658] [2019-10-15 03:31:51,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:31:51,602 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:51,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:31:51,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:31:51,603 INFO L87 Difference]: Start difference. First operand 463 states and 591 transitions. Second operand 4 states. [2019-10-15 03:31:51,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:51,821 INFO L93 Difference]: Finished difference Result 757 states and 989 transitions. [2019-10-15 03:31:51,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:31:51,821 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2019-10-15 03:31:51,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:51,833 INFO L225 Difference]: With dead ends: 757 [2019-10-15 03:31:51,833 INFO L226 Difference]: Without dead ends: 537 [2019-10-15 03:31:51,835 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 259 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:31:51,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2019-10-15 03:31:51,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2019-10-15 03:31:51,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2019-10-15 03:31:51,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 668 transitions. [2019-10-15 03:31:51,904 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 668 transitions. Word has length 133 [2019-10-15 03:31:51,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:51,906 INFO L462 AbstractCegarLoop]: Abstraction has 537 states and 668 transitions. [2019-10-15 03:31:51,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:31:51,906 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 668 transitions. [2019-10-15 03:31:51,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-15 03:31:51,914 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:51,914 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:31:52,120 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:31:52,124 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:52,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:52,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1375568728, now seen corresponding path program 1 times [2019-10-15 03:31:52,125 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:52,125 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570380465] [2019-10-15 03:31:52,125 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:52,125 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:52,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:52,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:52,282 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 03:31:52,284 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570380465] [2019-10-15 03:31:52,284 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801851868] [2019-10-15 03:31:52,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:31:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:52,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:31:52,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:31:52,497 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 03:31:52,497 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:31:52,693 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-15 03:31:52,694 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:31:52,694 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 3] total 10 [2019-10-15 03:31:52,694 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233885377] [2019-10-15 03:31:52,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:31:52,695 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:52,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:31:52,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:31:52,696 INFO L87 Difference]: Start difference. First operand 537 states and 668 transitions. Second operand 3 states. [2019-10-15 03:31:52,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:52,764 INFO L93 Difference]: Finished difference Result 972 states and 1223 transitions. [2019-10-15 03:31:52,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:31:52,765 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 134 [2019-10-15 03:31:52,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:52,773 INFO L225 Difference]: With dead ends: 972 [2019-10-15 03:31:52,773 INFO L226 Difference]: Without dead ends: 711 [2019-10-15 03:31:52,775 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:31:52,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2019-10-15 03:31:52,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 585. [2019-10-15 03:31:52,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2019-10-15 03:31:52,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 726 transitions. [2019-10-15 03:31:52,844 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 726 transitions. Word has length 134 [2019-10-15 03:31:52,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:52,846 INFO L462 AbstractCegarLoop]: Abstraction has 585 states and 726 transitions. [2019-10-15 03:31:52,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:31:52,846 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 726 transitions. [2019-10-15 03:31:52,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2019-10-15 03:31:52,855 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:52,855 INFO L380 BasicCegarLoop]: trace histogram [6, 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] [2019-10-15 03:31:53,060 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:31:53,061 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:53,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:53,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1537180485, now seen corresponding path program 1 times [2019-10-15 03:31:53,063 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:53,063 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954069211] [2019-10-15 03:31:53,063 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:53,063 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:53,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 39 proven. 19 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-10-15 03:31:53,273 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954069211] [2019-10-15 03:31:53,273 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155633057] [2019-10-15 03:31:53,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:31:53,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:53,517 INFO L256 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-15 03:31:53,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:31:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 95 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-15 03:31:53,641 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:31:53,854 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:31:53,959 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:31:53,959 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:31:53,981 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:31:54,016 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2019-10-15 03:31:54,017 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [682467862] [2019-10-15 03:31:54,045 INFO L162 IcfgInterpreter]: Started Sifa with 95 locations of interest [2019-10-15 03:31:54,045 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:31:54,053 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:31:54,060 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:31:54,061 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:31:54,252 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 37 for LOIs [2019-10-15 03:31:54,276 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 61 for LOIs [2019-10-15 03:31:54,553 INFO L199 IcfgInterpreter]: Interpreting procedure init_model with input of size 41 for LOIs [2019-10-15 03:31:54,595 INFO L199 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 68 for LOIs [2019-10-15 03:32:24,162 INFO L199 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 22 for LOIs [2019-10-15 03:32:24,180 INFO L199 IcfgInterpreter]: Interpreting procedure update_channels with input of size 10 for LOIs [2019-10-15 03:32:24,183 INFO L199 IcfgInterpreter]: Interpreting procedure stop_simulation with input of size 10 for LOIs [2019-10-15 03:32:24,208 INFO L199 IcfgInterpreter]: Interpreting procedure eval with input of size 34 for LOIs