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-f4eb214f-m [2019-10-13 23:26:58,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:26:58,466 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:26:58,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:26:58,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:26:58,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:26:58,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:26:58,482 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:26:58,484 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:26:58,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:26:58,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:26:58,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:26:58,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:26:58,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:26:58,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:26:58,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:26:58,490 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:26:58,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:26:58,493 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:26:58,495 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:26:58,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:26:58,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:26:58,498 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:26:58,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:26:58,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:26:58,501 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:26:58,501 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:26:58,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:26:58,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:26:58,504 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:26:58,504 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:26:58,504 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:26:58,505 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:26:58,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:26:58,507 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:26:58,507 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:26:58,508 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:26:58,508 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:26:58,508 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:26:58,509 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:26:58,510 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:26:58,510 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 23:26:58,525 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:26:58,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:26:58,526 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:26:58,526 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:26:58,527 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:26:58,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:26:58,527 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:26:58,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:26:58,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:26:58,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:26:58,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:26:58,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:26:58,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:26:58,528 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:26:58,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:26:58,529 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:26:58,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:26:58,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:26:58,529 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:26:58,529 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:26:58,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:26:58,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:26:58,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:26:58,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:26:58,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:26:58,531 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:26:58,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:26:58,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:26:58,531 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 23:26:58,809 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:26:58,824 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:26:58,827 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:26:58,829 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:26:58,829 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:26:58,830 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.01.cil-2.c [2019-10-13 23:26:58,906 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/737e33a09/384ccf9fdcc840acb1478c885889aea5/FLAGdf2a73444 [2019-10-13 23:26:59,406 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:26:59,407 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/token_ring.01.cil-2.c [2019-10-13 23:26:59,416 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/737e33a09/384ccf9fdcc840acb1478c885889aea5/FLAGdf2a73444 [2019-10-13 23:26:59,810 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/737e33a09/384ccf9fdcc840acb1478c885889aea5 [2019-10-13 23:26:59,820 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:26:59,821 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:26:59,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:26:59,822 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:26:59,826 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:26:59,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:26:59" (1/1) ... [2019-10-13 23:26:59,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@651b1909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:26:59, skipping insertion in model container [2019-10-13 23:26:59,829 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:26:59" (1/1) ... [2019-10-13 23:26:59,836 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:26:59,866 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:27:00,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:27:00,108 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:27:00,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:27:00,252 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:27:00,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:00 WrapperNode [2019-10-13 23:27:00,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:27:00,253 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:27:00,253 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:27:00,253 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:27:00,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:00" (1/1) ... [2019-10-13 23:27:00,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:00" (1/1) ... [2019-10-13 23:27:00,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:00" (1/1) ... [2019-10-13 23:27:00,271 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:00" (1/1) ... [2019-10-13 23:27:00,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:00" (1/1) ... [2019-10-13 23:27:00,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:00" (1/1) ... [2019-10-13 23:27:00,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:00" (1/1) ... [2019-10-13 23:27:00,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:27:00,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:27:00,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:27:00,295 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:27:00,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:00" (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 23:27:00,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:27:00,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:27:00,359 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-13 23:27:00,359 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-10-13 23:27:00,359 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-10-13 23:27:00,360 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-10-13 23:27:00,360 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-10-13 23:27:00,360 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-10-13 23:27:00,360 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-13 23:27:00,360 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-13 23:27:00,360 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-13 23:27:00,360 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-10-13 23:27:00,361 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-10-13 23:27:00,361 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-10-13 23:27:00,361 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-10-13 23:27:00,361 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-10-13 23:27:00,361 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-10-13 23:27:00,361 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-13 23:27:00,362 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-13 23:27:00,362 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-13 23:27:00,362 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:27:00,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:27:00,362 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-13 23:27:00,362 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-10-13 23:27:00,363 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-10-13 23:27:00,363 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-10-13 23:27:00,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:27:00,363 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-10-13 23:27:00,363 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-10-13 23:27:00,363 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-10-13 23:27:00,364 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-13 23:27:00,364 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-13 23:27:00,364 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-13 23:27:00,364 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-10-13 23:27:00,364 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-10-13 23:27:00,365 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-10-13 23:27:00,365 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-10-13 23:27:00,365 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-10-13 23:27:00,365 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-13 23:27:00,365 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-13 23:27:00,365 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-13 23:27:00,365 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:27:00,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:27:00,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:27:01,120 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:27:01,120 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-13 23:27:01,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:27:01 BoogieIcfgContainer [2019-10-13 23:27:01,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:27:01,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:27:01,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:27:01,127 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:27:01,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:26:59" (1/3) ... [2019-10-13 23:27:01,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d70435d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:27:01, skipping insertion in model container [2019-10-13 23:27:01,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:00" (2/3) ... [2019-10-13 23:27:01,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d70435d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:27:01, skipping insertion in model container [2019-10-13 23:27:01,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:27:01" (3/3) ... [2019-10-13 23:27:01,134 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.01.cil-2.c [2019-10-13 23:27:01,144 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:27:01,156 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:27:01,168 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:27:01,194 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:27:01,195 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:27:01,195 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:27:01,195 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:27:01,195 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:27:01,195 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:27:01,196 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:27:01,196 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:27:01,220 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states. [2019-10-13 23:27:01,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-13 23:27:01,232 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:01,233 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] [2019-10-13 23:27:01,236 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:01,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:01,242 INFO L82 PathProgramCache]: Analyzing trace with hash 643454482, now seen corresponding path program 1 times [2019-10-13 23:27:01,252 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:01,252 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210417997] [2019-10-13 23:27:01,252 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:01,253 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:01,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:01,572 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 23:27:01,572 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210417997] [2019-10-13 23:27:01,573 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:01,574 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:27:01,574 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187069922] [2019-10-13 23:27:01,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:01,580 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:01,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:01,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:01,593 INFO L87 Difference]: Start difference. First operand 113 states. Second operand 4 states. [2019-10-13 23:27:02,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:02,029 INFO L93 Difference]: Finished difference Result 300 states and 406 transitions. [2019-10-13 23:27:02,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:02,031 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2019-10-13 23:27:02,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:02,057 INFO L225 Difference]: With dead ends: 300 [2019-10-13 23:27:02,057 INFO L226 Difference]: Without dead ends: 191 [2019-10-13 23:27:02,065 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 [2019-10-13 23:27:02,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-10-13 23:27:02,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 186. [2019-10-13 23:27:02,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-10-13 23:27:02,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 230 transitions. [2019-10-13 23:27:02,207 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 230 transitions. Word has length 57 [2019-10-13 23:27:02,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:02,208 INFO L462 AbstractCegarLoop]: Abstraction has 186 states and 230 transitions. [2019-10-13 23:27:02,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:02,209 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 230 transitions. [2019-10-13 23:27:02,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-13 23:27:02,218 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:02,218 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] [2019-10-13 23:27:02,218 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:02,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:02,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1029063149, now seen corresponding path program 1 times [2019-10-13 23:27:02,219 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:02,220 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379543945] [2019-10-13 23:27:02,220 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:02,221 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:02,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:02,403 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 23:27:02,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379543945] [2019-10-13 23:27:02,404 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:02,404 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:27:02,405 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026519293] [2019-10-13 23:27:02,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:27:02,408 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:02,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:27:02,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:27:02,408 INFO L87 Difference]: Start difference. First operand 186 states and 230 transitions. Second operand 3 states. [2019-10-13 23:27:02,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:02,484 INFO L93 Difference]: Finished difference Result 507 states and 665 transitions. [2019-10-13 23:27:02,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:27:02,485 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2019-10-13 23:27:02,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:02,490 INFO L225 Difference]: With dead ends: 507 [2019-10-13 23:27:02,491 INFO L226 Difference]: Without dead ends: 337 [2019-10-13 23:27:02,494 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 23:27:02,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2019-10-13 23:27:02,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 335. [2019-10-13 23:27:02,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2019-10-13 23:27:02,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 425 transitions. [2019-10-13 23:27:02,546 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 425 transitions. Word has length 57 [2019-10-13 23:27:02,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:02,548 INFO L462 AbstractCegarLoop]: Abstraction has 335 states and 425 transitions. [2019-10-13 23:27:02,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:27:02,548 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 425 transitions. [2019-10-13 23:27:02,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-13 23:27:02,551 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:02,552 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] [2019-10-13 23:27:02,552 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:02,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:02,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1706780877, now seen corresponding path program 1 times [2019-10-13 23:27:02,553 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:02,553 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956775701] [2019-10-13 23:27:02,554 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:02,554 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:02,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:02,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 23:27:02,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956775701] [2019-10-13 23:27:02,641 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:02,641 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:27:02,642 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69288253] [2019-10-13 23:27:02,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:02,642 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:02,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:02,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:02,644 INFO L87 Difference]: Start difference. First operand 335 states and 425 transitions. Second operand 4 states. [2019-10-13 23:27:02,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:02,766 INFO L93 Difference]: Finished difference Result 863 states and 1121 transitions. [2019-10-13 23:27:02,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:02,768 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2019-10-13 23:27:02,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:02,778 INFO L225 Difference]: With dead ends: 863 [2019-10-13 23:27:02,779 INFO L226 Difference]: Without dead ends: 545 [2019-10-13 23:27:02,781 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 23:27:02,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2019-10-13 23:27:02,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 463. [2019-10-13 23:27:02,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2019-10-13 23:27:02,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 591 transitions. [2019-10-13 23:27:02,862 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 591 transitions. Word has length 93 [2019-10-13 23:27:02,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:02,864 INFO L462 AbstractCegarLoop]: Abstraction has 463 states and 591 transitions. [2019-10-13 23:27:02,864 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:02,864 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 591 transitions. [2019-10-13 23:27:02,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 23:27:02,879 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:02,880 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] [2019-10-13 23:27:02,880 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:02,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:02,881 INFO L82 PathProgramCache]: Analyzing trace with hash 734950659, now seen corresponding path program 1 times [2019-10-13 23:27:02,881 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:02,881 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747973791] [2019-10-13 23:27:02,881 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:02,882 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:02,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:02,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:03,105 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-13 23:27:03,106 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747973791] [2019-10-13 23:27:03,106 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545425148] [2019-10-13 23:27:03,106 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 23:27:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:03,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 23:27:03,293 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 23:27:03,343 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-13 23:27:03,533 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:27:03,533 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [8] total 10 [2019-10-13 23:27:03,534 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406638137] [2019-10-13 23:27:03,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:03,535 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:03,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:03,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:27:03,536 INFO L87 Difference]: Start difference. First operand 463 states and 591 transitions. Second operand 4 states. [2019-10-13 23:27:03,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:03,726 INFO L93 Difference]: Finished difference Result 757 states and 989 transitions. [2019-10-13 23:27:03,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:03,726 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2019-10-13 23:27:03,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:03,731 INFO L225 Difference]: With dead ends: 757 [2019-10-13 23:27:03,731 INFO L226 Difference]: Without dead ends: 537 [2019-10-13 23:27:03,733 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 [2019-10-13 23:27:03,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2019-10-13 23:27:03,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2019-10-13 23:27:03,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2019-10-13 23:27:03,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 668 transitions. [2019-10-13 23:27:03,780 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 668 transitions. Word has length 133 [2019-10-13 23:27:03,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:03,780 INFO L462 AbstractCegarLoop]: Abstraction has 537 states and 668 transitions. [2019-10-13 23:27:03,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:03,781 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 668 transitions. [2019-10-13 23:27:03,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2019-10-13 23:27:03,785 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:03,785 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] [2019-10-13 23:27:03,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:03,990 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:03,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:03,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1537180485, now seen corresponding path program 1 times [2019-10-13 23:27:03,991 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:03,991 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602745642] [2019-10-13 23:27:03,991 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:03,991 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:03,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:04,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:04,139 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 39 proven. 19 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-10-13 23:27:04,140 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602745642] [2019-10-13 23:27:04,140 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366303691] [2019-10-13 23:27:04,141 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 23:27:04,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:04,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-13 23:27:04,293 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:04,433 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 95 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-13 23:27:04,434 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:04,650 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:27:04,761 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:27:04,762 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:27:04,782 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:27:04,840 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2019-10-13 23:27:04,841 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1338804829] [2019-10-13 23:27:04,889 INFO L162 IcfgInterpreter]: Started Sifa with 95 locations of interest [2019-10-13 23:27:04,891 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 23:27:04,898 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 23:27:04,908 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 23:27:04,910 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 23:27:05,141 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 37 for LOIs [2019-10-13 23:27:05,177 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 61 for LOIs [2019-10-13 23:27:05,540 INFO L199 IcfgInterpreter]: Interpreting procedure init_model with input of size 41 for LOIs [2019-10-13 23:27:05,590 INFO L199 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 68 for LOIs [2019-10-13 23:27:08,521 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:08,523 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 23:27:08,529 INFO L168 Benchmark]: Toolchain (without parser) took 8706.48 ms. Allocated memory was 135.8 MB in the beginning and 417.9 MB in the end (delta: 282.1 MB). Free memory was 100.2 MB in the beginning and 183.4 MB in the end (delta: -83.2 MB). Peak memory consumption was 198.9 MB. Max. memory is 7.1 GB. [2019-10-13 23:27:08,530 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 135.8 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 23:27:08,531 INFO L168 Benchmark]: CACSL2BoogieTranslator took 430.36 ms. Allocated memory was 135.8 MB in the beginning and 199.2 MB in the end (delta: 63.4 MB). Free memory was 100.0 MB in the beginning and 175.9 MB in the end (delta: -75.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. [2019-10-13 23:27:08,532 INFO L168 Benchmark]: Boogie Preprocessor took 41.78 ms. Allocated memory is still 199.2 MB. Free memory was 175.9 MB in the beginning and 173.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-10-13 23:27:08,532 INFO L168 Benchmark]: RCFGBuilder took 827.18 ms. Allocated memory is still 199.2 MB. Free memory was 173.8 MB in the beginning and 118.7 MB in the end (delta: 55.0 MB). Peak memory consumption was 55.0 MB. Max. memory is 7.1 GB. [2019-10-13 23:27:08,533 INFO L168 Benchmark]: TraceAbstraction took 7402.56 ms. Allocated memory was 199.2 MB in the beginning and 417.9 MB in the end (delta: 218.6 MB). Free memory was 118.0 MB in the beginning and 183.4 MB in the end (delta: -65.3 MB). Peak memory consumption was 153.3 MB. Max. memory is 7.1 GB. [2019-10-13 23:27:08,542 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 135.8 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 430.36 ms. Allocated memory was 135.8 MB in the beginning and 199.2 MB in the end (delta: 63.4 MB). Free memory was 100.0 MB in the beginning and 175.9 MB in the end (delta: -75.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 41.78 ms. Allocated memory is still 199.2 MB. Free memory was 175.9 MB in the beginning and 173.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 827.18 ms. Allocated memory is still 199.2 MB. Free memory was 173.8 MB in the beginning and 118.7 MB in the end (delta: 55.0 MB). Peak memory consumption was 55.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7402.56 ms. Allocated memory was 199.2 MB in the beginning and 417.9 MB in the end (delta: 218.6 MB). Free memory was 118.0 MB in the beginning and 183.4 MB in the end (delta: -65.3 MB). Peak memory consumption was 153.3 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...