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.02.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 17:14:23,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 17:14:23,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 17:14:23,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 17:14:23,353 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 17:14:23,354 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 17:14:23,356 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 17:14:23,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 17:14:23,359 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 17:14:23,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 17:14:23,361 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 17:14:23,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 17:14:23,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 17:14:23,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 17:14:23,365 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 17:14:23,366 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 17:14:23,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 17:14:23,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 17:14:23,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 17:14:23,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 17:14:23,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 17:14:23,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 17:14:23,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 17:14:23,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 17:14:23,378 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-07 17:14:23,379 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-07 17:14:23,379 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-07 17:14:23,380 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-07 17:14:23,380 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-07 17:14:23,381 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-07 17:14:23,381 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 17:14:23,382 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 17:14:23,383 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 17:14:23,384 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 17:14:23,385 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 17:14:23,385 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 17:14:23,386 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 17:14:23,386 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 17:14:23,386 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 17:14:23,387 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 17:14:23,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 17:14:23,388 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 [2019-10-07 17:14:23,407 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 17:14:23,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 17:14:23,409 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 17:14:23,409 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 17:14:23,409 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 17:14:23,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 17:14:23,410 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 17:14:23,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 17:14:23,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 17:14:23,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 17:14:23,410 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 17:14:23,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 17:14:23,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 17:14:23,411 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 17:14:23,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 17:14:23,411 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 17:14:23,411 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 17:14:23,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 17:14:23,412 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 17:14:23,412 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 17:14:23,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 17:14:23,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 17:14:23,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 17:14:23,413 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 17:14:23,413 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 17:14:23,413 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 17:14:23,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 17:14:23,414 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 17:14:23,414 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 [2019-10-07 17:14:23,675 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 17:14:23,696 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 17:14:23,699 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 17:14:23,701 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 17:14:23,701 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 17:14:23,702 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.02.cil-1.c [2019-10-07 17:14:23,775 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d32d1e80/72e1453384b14c2f8bd0557983715842/FLAGaeceedece [2019-10-07 17:14:24,247 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 17:14:24,248 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/token_ring.02.cil-1.c [2019-10-07 17:14:24,264 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d32d1e80/72e1453384b14c2f8bd0557983715842/FLAGaeceedece [2019-10-07 17:14:24,543 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d32d1e80/72e1453384b14c2f8bd0557983715842 [2019-10-07 17:14:24,552 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 17:14:24,554 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 17:14:24,555 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 17:14:24,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 17:14:24,559 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 17:14:24,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 05:14:24" (1/1) ... [2019-10-07 17:14:24,563 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c9fb768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:24, skipping insertion in model container [2019-10-07 17:14:24,563 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 05:14:24" (1/1) ... [2019-10-07 17:14:24,570 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 17:14:24,602 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 17:14:24,826 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 17:14:24,832 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 17:14:24,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 17:14:24,983 INFO L192 MainTranslator]: Completed translation [2019-10-07 17:14:24,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:24 WrapperNode [2019-10-07 17:14:24,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 17:14:24,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 17:14:24,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 17:14:24,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 17:14:24,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:24" (1/1) ... [2019-10-07 17:14:24,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:24" (1/1) ... [2019-10-07 17:14:25,002 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:24" (1/1) ... [2019-10-07 17:14:25,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:24" (1/1) ... [2019-10-07 17:14:25,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:24" (1/1) ... [2019-10-07 17:14:25,033 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:24" (1/1) ... [2019-10-07 17:14:25,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:24" (1/1) ... [2019-10-07 17:14:25,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 17:14:25,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 17:14:25,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 17:14:25,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 17:14:25,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:24" (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 [2019-10-07 17:14:25,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 17:14:25,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 17:14:25,095 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-07 17:14:25,095 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-10-07 17:14:25,096 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-10-07 17:14:25,096 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2019-10-07 17:14:25,097 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-10-07 17:14:25,097 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-10-07 17:14:25,097 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2019-10-07 17:14:25,097 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-10-07 17:14:25,097 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-07 17:14:25,098 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-07 17:14:25,098 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-07 17:14:25,098 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-10-07 17:14:25,098 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-10-07 17:14:25,098 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-10-07 17:14:25,099 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-10-07 17:14:25,099 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-10-07 17:14:25,099 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-10-07 17:14:25,099 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-07 17:14:25,099 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-07 17:14:25,099 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-07 17:14:25,100 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 17:14:25,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 17:14:25,100 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-07 17:14:25,100 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-10-07 17:14:25,100 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-10-07 17:14:25,101 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2019-10-07 17:14:25,101 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-10-07 17:14:25,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 17:14:25,101 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-10-07 17:14:25,101 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-10-07 17:14:25,101 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2019-10-07 17:14:25,102 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-10-07 17:14:25,102 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-07 17:14:25,102 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-07 17:14:25,102 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-07 17:14:25,102 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-10-07 17:14:25,102 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-10-07 17:14:25,102 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-10-07 17:14:25,103 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-10-07 17:14:25,103 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-10-07 17:14:25,103 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-07 17:14:25,103 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-07 17:14:25,103 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-07 17:14:25,103 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 17:14:25,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 17:14:25,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 17:14:26,040 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 17:14:26,040 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-07 17:14:26,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 05:14:26 BoogieIcfgContainer [2019-10-07 17:14:26,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 17:14:26,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 17:14:26,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 17:14:26,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 17:14:26,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 05:14:24" (1/3) ... [2019-10-07 17:14:26,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f5c079d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 05:14:26, skipping insertion in model container [2019-10-07 17:14:26,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:24" (2/3) ... [2019-10-07 17:14:26,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f5c079d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 05:14:26, skipping insertion in model container [2019-10-07 17:14:26,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 05:14:26" (3/3) ... [2019-10-07 17:14:26,050 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.02.cil-1.c [2019-10-07 17:14:26,060 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 17:14:26,069 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 17:14:26,078 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 17:14:26,106 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 17:14:26,106 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 17:14:26,106 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 17:14:26,106 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 17:14:26,111 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 17:14:26,112 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 17:14:26,112 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 17:14:26,112 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 17:14:26,139 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states. [2019-10-07 17:14:26,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-07 17:14:26,148 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:26,149 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:14:26,151 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:26,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:26,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1639965672, now seen corresponding path program 1 times [2019-10-07 17:14:26,167 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:26,167 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:26,168 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:26,168 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:26,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:26,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 17:14:26,533 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:26,534 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:14:26,534 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 17:14:26,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:14:26,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:14:26,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:14:26,563 INFO L87 Difference]: Start difference. First operand 125 states. Second operand 4 states. [2019-10-07 17:14:26,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:26,993 INFO L93 Difference]: Finished difference Result 333 states and 452 transitions. [2019-10-07 17:14:26,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:14:26,995 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2019-10-07 17:14:26,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:27,013 INFO L225 Difference]: With dead ends: 333 [2019-10-07 17:14:27,013 INFO L226 Difference]: Without dead ends: 212 [2019-10-07 17:14:27,018 INFO L606 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 [2019-10-07 17:14:27,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-10-07 17:14:27,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2019-10-07 17:14:27,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-10-07 17:14:27,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 263 transitions. [2019-10-07 17:14:27,123 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 263 transitions. Word has length 63 [2019-10-07 17:14:27,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:27,126 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 263 transitions. [2019-10-07 17:14:27,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:14:27,126 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 263 transitions. [2019-10-07 17:14:27,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-07 17:14:27,134 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:27,135 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:14:27,135 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:27,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:27,136 INFO L82 PathProgramCache]: Analyzing trace with hash 849498777, now seen corresponding path program 1 times [2019-10-07 17:14:27,136 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:27,137 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:27,137 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:27,137 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:27,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:27,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-07 17:14:27,331 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:27,332 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:27,333 INFO L95 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 [2019-10-07 17:14:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:27,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-07 17:14:27,514 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-07 17:14:27,596 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:27,734 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-07 17:14:27,734 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 17:14:27,735 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-10-07 17:14:27,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:14:27,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:14:27,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-07 17:14:27,738 INFO L87 Difference]: Start difference. First operand 211 states and 263 transitions. Second operand 4 states. [2019-10-07 17:14:27,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:27,810 INFO L93 Difference]: Finished difference Result 375 states and 473 transitions. [2019-10-07 17:14:27,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:14:27,810 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2019-10-07 17:14:27,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:27,821 INFO L225 Difference]: With dead ends: 375 [2019-10-07 17:14:27,827 INFO L226 Difference]: Without dead ends: 274 [2019-10-07 17:14:27,831 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-07 17:14:27,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2019-10-07 17:14:27,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 232. [2019-10-07 17:14:27,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2019-10-07 17:14:27,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 295 transitions. [2019-10-07 17:14:27,889 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 295 transitions. Word has length 106 [2019-10-07 17:14:27,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:27,891 INFO L462 AbstractCegarLoop]: Abstraction has 232 states and 295 transitions. [2019-10-07 17:14:27,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:14:27,892 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 295 transitions. [2019-10-07 17:14:27,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-07 17:14:27,900 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:27,900 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:14:28,114 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:28,114 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:28,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:28,115 INFO L82 PathProgramCache]: Analyzing trace with hash -226352789, now seen corresponding path program 1 times [2019-10-07 17:14:28,115 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:28,115 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:28,115 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:28,115 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:28,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-07 17:14:28,289 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:28,289 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:28,289 INFO L95 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 [2019-10-07 17:14:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:28,436 INFO L256 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-07 17:14:28,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-07 17:14:28,500 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-07 17:14:28,726 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:14:28,726 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2019-10-07 17:14:28,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:14:28,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:14:28,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-07 17:14:28,727 INFO L87 Difference]: Start difference. First operand 232 states and 295 transitions. Second operand 3 states. [2019-10-07 17:14:28,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:28,772 INFO L93 Difference]: Finished difference Result 654 states and 861 transitions. [2019-10-07 17:14:28,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:14:28,773 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 140 [2019-10-07 17:14:28,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:28,776 INFO L225 Difference]: With dead ends: 654 [2019-10-07 17:14:28,776 INFO L226 Difference]: Without dead ends: 438 [2019-10-07 17:14:28,778 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 273 SyntacticMatches, 8 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-07 17:14:28,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2019-10-07 17:14:28,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 432. [2019-10-07 17:14:28,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 432 states. [2019-10-07 17:14:28,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 551 transitions. [2019-10-07 17:14:28,846 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 551 transitions. Word has length 140 [2019-10-07 17:14:28,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:28,847 INFO L462 AbstractCegarLoop]: Abstraction has 432 states and 551 transitions. [2019-10-07 17:14:28,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:14:28,847 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 551 transitions. [2019-10-07 17:14:28,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-07 17:14:28,854 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:28,854 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:14:29,059 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:29,060 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:29,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:29,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1178185681, now seen corresponding path program 1 times [2019-10-07 17:14:29,061 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:29,061 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:29,061 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:29,062 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:29,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-10-07 17:14:29,202 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:29,202 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:29,202 INFO L95 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 [2019-10-07 17:14:29,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:29,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 17:14:29,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-07 17:14:29,379 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-07 17:14:29,524 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 17:14:29,524 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-07 17:14:29,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:14:29,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:14:29,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-07 17:14:29,527 INFO L87 Difference]: Start difference. First operand 432 states and 551 transitions. Second operand 4 states. [2019-10-07 17:14:29,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:29,821 INFO L93 Difference]: Finished difference Result 1243 states and 1691 transitions. [2019-10-07 17:14:29,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:14:29,822 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-10-07 17:14:29,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:29,828 INFO L225 Difference]: With dead ends: 1243 [2019-10-07 17:14:29,828 INFO L226 Difference]: Without dead ends: 827 [2019-10-07 17:14:29,831 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-07 17:14:29,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2019-10-07 17:14:29,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 814. [2019-10-07 17:14:29,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 814 states. [2019-10-07 17:14:29,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1024 transitions. [2019-10-07 17:14:29,884 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1024 transitions. Word has length 140 [2019-10-07 17:14:29,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:29,887 INFO L462 AbstractCegarLoop]: Abstraction has 814 states and 1024 transitions. [2019-10-07 17:14:29,887 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:14:29,887 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1024 transitions. [2019-10-07 17:14:29,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-07 17:14:29,892 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:29,892 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-07 17:14:30,098 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:30,099 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:30,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:30,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1375141579, now seen corresponding path program 1 times [2019-10-07 17:14:30,100 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:30,100 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:30,101 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:30,101 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:30,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-07 17:14:30,227 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:30,227 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:30,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:30,374 INFO L256 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-07 17:14:30,379 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:30,409 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-07 17:14:30,409 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:30,589 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-10-07 17:14:30,589 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:14:30,589 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 3] total 10 [2019-10-07 17:14:30,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:14:30,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:14:30,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-07 17:14:30,591 INFO L87 Difference]: Start difference. First operand 814 states and 1024 transitions. Second operand 3 states. [2019-10-07 17:14:30,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:30,656 INFO L93 Difference]: Finished difference Result 1482 states and 1898 transitions. [2019-10-07 17:14:30,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:14:30,656 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 154 [2019-10-07 17:14:30,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:30,663 INFO L225 Difference]: With dead ends: 1482 [2019-10-07 17:14:30,663 INFO L226 Difference]: Without dead ends: 1070 [2019-10-07 17:14:30,666 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-07 17:14:30,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2019-10-07 17:14:30,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 895. [2019-10-07 17:14:30,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 895 states. [2019-10-07 17:14:30,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1134 transitions. [2019-10-07 17:14:30,724 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1134 transitions. Word has length 154 [2019-10-07 17:14:30,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:30,725 INFO L462 AbstractCegarLoop]: Abstraction has 895 states and 1134 transitions. [2019-10-07 17:14:30,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:14:30,725 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1134 transitions. [2019-10-07 17:14:30,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-07 17:14:30,729 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:30,730 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-07 17:14:30,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:30,938 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:30,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:30,939 INFO L82 PathProgramCache]: Analyzing trace with hash -881958040, now seen corresponding path program 1 times [2019-10-07 17:14:30,939 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:30,939 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:30,939 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:30,940 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:30,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:31,035 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-07 17:14:31,035 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:31,035 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:31,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:31,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-07 17:14:31,202 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-07 17:14:31,240 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-07 17:14:31,453 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 17:14:31,454 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [8] total 10 [2019-10-07 17:14:31,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:14:31,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:14:31,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-07 17:14:31,455 INFO L87 Difference]: Start difference. First operand 895 states and 1134 transitions. Second operand 4 states. [2019-10-07 17:14:31,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:31,631 INFO L93 Difference]: Finished difference Result 1546 states and 1950 transitions. [2019-10-07 17:14:31,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:14:31,632 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2019-10-07 17:14:31,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:31,641 INFO L225 Difference]: With dead ends: 1546 [2019-10-07 17:14:31,641 INFO L226 Difference]: Without dead ends: 1109 [2019-10-07 17:14:31,645 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 301 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-07 17:14:31,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2019-10-07 17:14:31,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1109. [2019-10-07 17:14:31,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1109 states. [2019-10-07 17:14:31,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1352 transitions. [2019-10-07 17:14:31,733 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1352 transitions. Word has length 154 [2019-10-07 17:14:31,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:31,734 INFO L462 AbstractCegarLoop]: Abstraction has 1109 states and 1352 transitions. [2019-10-07 17:14:31,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:14:31,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1352 transitions. [2019-10-07 17:14:31,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-07 17:14:31,740 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:31,741 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-07 17:14:31,954 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:31,954 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:31,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:31,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1931578956, now seen corresponding path program 2 times [2019-10-07 17:14:31,955 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:31,955 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:31,955 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:31,955 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:31,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:31,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-10-07 17:14:32,016 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:32,016 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:32,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:32,213 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-07 17:14:32,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-07 17:14:32,217 INFO L256 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 60 conjunts are in the unsatisfiable core [2019-10-07 17:14:32,223 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:32,371 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 29 proven. 39 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-07 17:14:32,372 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:32,881 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-07 17:14:32,882 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:14:32,882 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 9] total 13 [2019-10-07 17:14:32,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:14:32,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:14:32,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-10-07 17:14:32,883 INFO L87 Difference]: Start difference. First operand 1109 states and 1352 transitions. Second operand 4 states. [2019-10-07 17:14:33,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:33,065 INFO L93 Difference]: Finished difference Result 2040 states and 2512 transitions. [2019-10-07 17:14:33,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:14:33,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2019-10-07 17:14:33,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:33,074 INFO L225 Difference]: With dead ends: 2040 [2019-10-07 17:14:33,074 INFO L226 Difference]: Without dead ends: 1435 [2019-10-07 17:14:33,078 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 300 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-10-07 17:14:33,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2019-10-07 17:14:33,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1411. [2019-10-07 17:14:33,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1411 states. [2019-10-07 17:14:33,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 1662 transitions. [2019-10-07 17:14:33,265 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 1662 transitions. Word has length 154 [2019-10-07 17:14:33,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:33,266 INFO L462 AbstractCegarLoop]: Abstraction has 1411 states and 1662 transitions. [2019-10-07 17:14:33,266 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:14:33,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 1662 transitions. [2019-10-07 17:14:33,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-07 17:14:33,272 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:33,272 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:14:33,478 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:33,478 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:33,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:33,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1334316470, now seen corresponding path program 1 times [2019-10-07 17:14:33,479 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:33,479 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:33,480 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:33,480 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:33,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-07 17:14:33,560 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:33,560 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:33,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:33,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 17:14:33,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:33,760 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-07 17:14:33,760 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 27 proven. 8 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-07 17:14:33,910 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:14:33,910 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2019-10-07 17:14:33,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:14:33,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:14:33,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-07 17:14:33,912 INFO L87 Difference]: Start difference. First operand 1411 states and 1662 transitions. Second operand 3 states. [2019-10-07 17:14:33,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:33,996 INFO L93 Difference]: Finished difference Result 2166 states and 2638 transitions. [2019-10-07 17:14:33,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:14:33,996 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 154 [2019-10-07 17:14:33,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:34,004 INFO L225 Difference]: With dead ends: 2166 [2019-10-07 17:14:34,004 INFO L226 Difference]: Without dead ends: 1404 [2019-10-07 17:14:34,007 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-07 17:14:34,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2019-10-07 17:14:34,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1391. [2019-10-07 17:14:34,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1391 states. [2019-10-07 17:14:34,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 1612 transitions. [2019-10-07 17:14:34,127 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 1612 transitions. Word has length 154 [2019-10-07 17:14:34,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:34,128 INFO L462 AbstractCegarLoop]: Abstraction has 1391 states and 1612 transitions. [2019-10-07 17:14:34,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:14:34,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 1612 transitions. [2019-10-07 17:14:34,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-10-07 17:14:34,134 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:34,134 INFO L385 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2019-10-07 17:14:34,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:34,339 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:34,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:34,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1779210507, now seen corresponding path program 1 times [2019-10-07 17:14:34,340 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:34,340 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:34,340 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:34,340 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:34,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:34,584 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 41 proven. 23 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2019-10-07 17:14:34,584 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:34,585 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:34,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:34,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-07 17:14:34,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:34,899 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 117 proven. 4 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-10-07 17:14:34,899 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:35,148 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:14:35,276 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:14:35,276 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:14:35,298 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:14:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2019-10-07 17:14:35,443 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 17:14:35,480 INFO L162 IcfgInterpreter]: Started Sifa with 102 locations of interest [2019-10-07 17:14:35,480 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 17:14:35,492 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 17:14:35,508 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 17:14:35,509 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 17:14:35,782 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-07 17:14:35,824 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 83 for LOIs [2019-10-07 17:14:36,235 INFO L199 IcfgInterpreter]: Interpreting procedure init_model with input of size 53 for LOIs [2019-10-07 17:14:36,285 INFO L199 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 98 for LOIs [2019-10-07 17:14:39,132 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-10-07 17:14:39,142 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-10-07 17:14:39,496 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:39,497 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:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:133) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:436) 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:99) 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:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:287) ... 21 more [2019-10-07 17:14:39,503 INFO L168 Benchmark]: Toolchain (without parser) took 14947.88 ms. Allocated memory was 138.4 MB in the beginning and 637.5 MB in the end (delta: 499.1 MB). Free memory was 102.6 MB in the beginning and 169.5 MB in the end (delta: -66.9 MB). Peak memory consumption was 432.2 MB. Max. memory is 7.1 GB. [2019-10-07 17:14:39,504 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.4 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 17:14:39,505 INFO L168 Benchmark]: CACSL2BoogieTranslator took 429.29 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 102.4 MB in the beginning and 179.6 MB in the end (delta: -77.2 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. [2019-10-07 17:14:39,506 INFO L168 Benchmark]: Boogie Preprocessor took 55.04 ms. Allocated memory is still 203.4 MB. Free memory was 179.6 MB in the beginning and 176.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2019-10-07 17:14:39,507 INFO L168 Benchmark]: RCFGBuilder took 1000.77 ms. Allocated memory is still 203.4 MB. Free memory was 176.9 MB in the beginning and 106.1 MB in the end (delta: 70.8 MB). Peak memory consumption was 70.8 MB. Max. memory is 7.1 GB. [2019-10-07 17:14:39,507 INFO L168 Benchmark]: TraceAbstraction took 13457.22 ms. Allocated memory was 203.4 MB in the beginning and 637.5 MB in the end (delta: 434.1 MB). Free memory was 106.1 MB in the beginning and 169.5 MB in the end (delta: -63.4 MB). Peak memory consumption was 370.7 MB. Max. memory is 7.1 GB. [2019-10-07 17:14:39,514 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 138.4 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 429.29 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 102.4 MB in the beginning and 179.6 MB in the end (delta: -77.2 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 55.04 ms. Allocated memory is still 203.4 MB. Free memory was 179.6 MB in the beginning and 176.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1000.77 ms. Allocated memory is still 203.4 MB. Free memory was 176.9 MB in the beginning and 106.1 MB in the end (delta: 70.8 MB). Peak memory consumption was 70.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13457.22 ms. Allocated memory was 203.4 MB in the beginning and 637.5 MB in the end (delta: 434.1 MB). Free memory was 106.1 MB in the beginning and 169.5 MB in the end (delta: -63.4 MB). Peak memory consumption was 370.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...