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-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:27:02,050 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:27:02,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:27:02,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:27:02,069 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:27:02,071 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:27:02,073 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:27:02,080 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:27:02,082 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:27:02,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:27:02,085 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:27:02,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:27:02,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:27:02,091 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:27:02,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:27:02,096 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:27:02,098 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:27:02,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:27:02,103 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:27:02,109 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:27:02,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:27:02,117 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:27:02,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:27:02,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:27:02,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:27:02,125 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:27:02,125 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:27:02,128 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:27:02,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:27:02,133 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:27:02,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:27:02,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:27:02,135 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:27:02,136 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:27:02,137 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:27:02,137 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:27:02,138 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:27:02,138 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:27:02,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:27:02,139 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:27:02,140 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:27:02,140 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 23:27:02,155 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:27:02,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:27:02,157 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:27:02,158 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:27:02,158 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:27:02,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:27:02,158 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:27:02,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:27:02,159 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:27:02,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:27:02,160 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:27:02,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:27:02,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:27:02,161 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:27:02,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:27:02,161 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:27:02,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:27:02,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:27:02,162 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:27:02,162 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:27:02,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:27:02,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:27:02,163 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:27:02,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:27:02,163 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:27:02,163 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:27:02,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:27:02,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:27:02,164 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-13 23:27:02,448 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:27:02,477 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:27:02,482 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:27:02,484 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:27:02,485 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:27:02,486 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.02.cil-2.c [2019-10-13 23:27:02,564 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/775befd93/ee6f2052edd04706904a32c7a0bccba3/FLAGb92331e4c [2019-10-13 23:27:03,087 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:27:03,088 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/token_ring.02.cil-2.c [2019-10-13 23:27:03,099 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/775befd93/ee6f2052edd04706904a32c7a0bccba3/FLAGb92331e4c [2019-10-13 23:27:03,495 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/775befd93/ee6f2052edd04706904a32c7a0bccba3 [2019-10-13 23:27:03,507 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:27:03,509 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:27:03,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:27:03,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:27:03,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:27:03,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:27:03" (1/1) ... [2019-10-13 23:27:03,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@665abbeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:03, skipping insertion in model container [2019-10-13 23:27:03,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:27:03" (1/1) ... [2019-10-13 23:27:03,527 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:27:03,580 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:27:03,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:27:03,820 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:27:03,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:27:04,002 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:27:04,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:04 WrapperNode [2019-10-13 23:27:04,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:27:04,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:27:04,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:27:04,003 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:27:04,014 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:04" (1/1) ... [2019-10-13 23:27:04,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:04" (1/1) ... [2019-10-13 23:27:04,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:04" (1/1) ... [2019-10-13 23:27:04,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:04" (1/1) ... [2019-10-13 23:27:04,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:04" (1/1) ... [2019-10-13 23:27:04,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:04" (1/1) ... [2019-10-13 23:27:04,063 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:04" (1/1) ... [2019-10-13 23:27:04,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:27:04,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:27:04,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:27:04,073 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:27:04,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:04" (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 23:27:04,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:27:04,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:27:04,127 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-13 23:27:04,127 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-10-13 23:27:04,127 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-10-13 23:27:04,128 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2019-10-13 23:27:04,129 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-10-13 23:27:04,130 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-10-13 23:27:04,130 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2019-10-13 23:27:04,130 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-10-13 23:27:04,130 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-13 23:27:04,131 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-13 23:27:04,131 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-13 23:27:04,132 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-10-13 23:27:04,132 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-10-13 23:27:04,132 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-10-13 23:27:04,135 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-10-13 23:27:04,135 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-10-13 23:27:04,135 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-10-13 23:27:04,135 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-13 23:27:04,135 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-13 23:27:04,136 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-13 23:27:04,136 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:27:04,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:27:04,137 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-13 23:27:04,138 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-10-13 23:27:04,138 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-10-13 23:27:04,138 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2019-10-13 23:27:04,139 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-10-13 23:27:04,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:27:04,139 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-10-13 23:27:04,139 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-10-13 23:27:04,139 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2019-10-13 23:27:04,140 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-10-13 23:27:04,140 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-13 23:27:04,140 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-13 23:27:04,140 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-13 23:27:04,140 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-10-13 23:27:04,140 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-10-13 23:27:04,141 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-10-13 23:27:04,141 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-10-13 23:27:04,141 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-10-13 23:27:04,141 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-13 23:27:04,141 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-13 23:27:04,141 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-13 23:27:04,141 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:27:04,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:27:04,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:27:05,201 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:27:05,202 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-13 23:27:05,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:27:05 BoogieIcfgContainer [2019-10-13 23:27:05,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:27:05,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:27:05,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:27:05,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:27:05,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:27:03" (1/3) ... [2019-10-13 23:27:05,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52239818 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:27:05, skipping insertion in model container [2019-10-13 23:27:05,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:04" (2/3) ... [2019-10-13 23:27:05,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52239818 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:27:05, skipping insertion in model container [2019-10-13 23:27:05,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:27:05" (3/3) ... [2019-10-13 23:27:05,212 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.02.cil-2.c [2019-10-13 23:27:05,223 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:27:05,233 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:27:05,246 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:27:05,274 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:27:05,274 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:27:05,275 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:27:05,275 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:27:05,275 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:27:05,275 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:27:05,276 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:27:05,276 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:27:05,304 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states. [2019-10-13 23:27:05,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-13 23:27:05,313 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:05,314 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:05,316 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:05,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:05,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1027832444, now seen corresponding path program 1 times [2019-10-13 23:27:05,329 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:05,329 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492973997] [2019-10-13 23:27:05,330 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:05,330 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:05,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:05,716 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 23:27:05,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492973997] [2019-10-13 23:27:05,718 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:05,719 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:27:05,719 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759741550] [2019-10-13 23:27:05,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:05,725 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:05,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:05,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:05,744 INFO L87 Difference]: Start difference. First operand 130 states. Second operand 4 states. [2019-10-13 23:27:06,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:06,156 INFO L93 Difference]: Finished difference Result 344 states and 471 transitions. [2019-10-13 23:27:06,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:06,158 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2019-10-13 23:27:06,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:06,174 INFO L225 Difference]: With dead ends: 344 [2019-10-13 23:27:06,175 INFO L226 Difference]: Without dead ends: 218 [2019-10-13 23:27:06,180 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 23:27:06,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-10-13 23:27:06,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2019-10-13 23:27:06,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-10-13 23:27:06,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 272 transitions. [2019-10-13 23:27:06,270 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 272 transitions. Word has length 64 [2019-10-13 23:27:06,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:06,270 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 272 transitions. [2019-10-13 23:27:06,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:06,271 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 272 transitions. [2019-10-13 23:27:06,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-13 23:27:06,277 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:06,277 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:06,278 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:06,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:06,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1647916486, now seen corresponding path program 1 times [2019-10-13 23:27:06,278 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:06,279 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093696940] [2019-10-13 23:27:06,279 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:06,279 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:06,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-13 23:27:06,431 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093696940] [2019-10-13 23:27:06,432 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97804522] [2019-10-13 23:27:06,432 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 23:27:06,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:06,598 INFO L256 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 23:27:06,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 23:27:06,693 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 23:27:06,819 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:27:06,819 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-10-13 23:27:06,819 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518305734] [2019-10-13 23:27:06,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:06,822 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:06,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:06,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:27:06,823 INFO L87 Difference]: Start difference. First operand 217 states and 272 transitions. Second operand 4 states. [2019-10-13 23:27:06,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:06,945 INFO L93 Difference]: Finished difference Result 386 states and 490 transitions. [2019-10-13 23:27:06,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:06,947 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2019-10-13 23:27:06,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:06,957 INFO L225 Difference]: With dead ends: 386 [2019-10-13 23:27:06,961 INFO L226 Difference]: Without dead ends: 280 [2019-10-13 23:27:06,964 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:27:06,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2019-10-13 23:27:07,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 238. [2019-10-13 23:27:07,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2019-10-13 23:27:07,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 304 transitions. [2019-10-13 23:27:07,026 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 304 transitions. Word has length 108 [2019-10-13 23:27:07,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:07,027 INFO L462 AbstractCegarLoop]: Abstraction has 238 states and 304 transitions. [2019-10-13 23:27:07,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:07,028 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 304 transitions. [2019-10-13 23:27:07,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-13 23:27:07,034 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:07,035 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 23:27:07,250 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:07,255 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:07,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:07,255 INFO L82 PathProgramCache]: Analyzing trace with hash 222884582, now seen corresponding path program 1 times [2019-10-13 23:27:07,256 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:07,256 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237538616] [2019-10-13 23:27:07,256 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:07,256 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:07,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:07,423 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-13 23:27:07,424 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237538616] [2019-10-13 23:27:07,424 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165555627] [2019-10-13 23:27:07,424 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 23:27:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:07,594 INFO L256 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 23:27:07,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-13 23:27:07,669 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-13 23:27:07,896 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:27:07,896 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2019-10-13 23:27:07,896 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048787920] [2019-10-13 23:27:07,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:27:07,897 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:07,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:27:07,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:27:07,898 INFO L87 Difference]: Start difference. First operand 238 states and 304 transitions. Second operand 3 states. [2019-10-13 23:27:07,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:07,955 INFO L93 Difference]: Finished difference Result 672 states and 888 transitions. [2019-10-13 23:27:07,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:27:07,956 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2019-10-13 23:27:07,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:07,961 INFO L225 Difference]: With dead ends: 672 [2019-10-13 23:27:07,961 INFO L226 Difference]: Without dead ends: 450 [2019-10-13 23:27:07,963 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 277 SyntacticMatches, 8 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:27:07,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2019-10-13 23:27:08,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 443. [2019-10-13 23:27:08,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2019-10-13 23:27:08,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 568 transitions. [2019-10-13 23:27:08,014 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 568 transitions. Word has length 142 [2019-10-13 23:27:08,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:08,015 INFO L462 AbstractCegarLoop]: Abstraction has 443 states and 568 transitions. [2019-10-13 23:27:08,015 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:27:08,015 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 568 transitions. [2019-10-13 23:27:08,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-13 23:27:08,026 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:08,026 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 23:27:08,231 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:08,232 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:08,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:08,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1481257174, now seen corresponding path program 1 times [2019-10-13 23:27:08,234 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:08,234 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563183483] [2019-10-13 23:27:08,235 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:08,235 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:08,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:08,419 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-10-13 23:27:08,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563183483] [2019-10-13 23:27:08,420 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045293104] [2019-10-13 23:27:08,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:08,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:27:08,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 23:27:08,618 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-13 23:27:08,777 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:27:08,777 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-13 23:27:08,778 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764851461] [2019-10-13 23:27:08,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:08,779 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:08,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:08,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:27:08,779 INFO L87 Difference]: Start difference. First operand 443 states and 568 transitions. Second operand 4 states. [2019-10-13 23:27:09,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:09,073 INFO L93 Difference]: Finished difference Result 1276 states and 1742 transitions. [2019-10-13 23:27:09,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:09,074 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 142 [2019-10-13 23:27:09,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:09,084 INFO L225 Difference]: With dead ends: 1276 [2019-10-13 23:27:09,084 INFO L226 Difference]: Without dead ends: 849 [2019-10-13 23:27:09,087 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:27:09,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2019-10-13 23:27:09,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 835. [2019-10-13 23:27:09,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 835 states. [2019-10-13 23:27:09,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1057 transitions. [2019-10-13 23:27:09,177 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1057 transitions. Word has length 142 [2019-10-13 23:27:09,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:09,182 INFO L462 AbstractCegarLoop]: Abstraction has 835 states and 1057 transitions. [2019-10-13 23:27:09,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:09,185 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1057 transitions. [2019-10-13 23:27:09,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-13 23:27:09,192 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:09,193 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:09,398 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:09,399 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:09,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:09,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1555232879, now seen corresponding path program 1 times [2019-10-13 23:27:09,400 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:09,400 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797257951] [2019-10-13 23:27:09,401 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:09,401 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:09,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:09,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:09,545 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-13 23:27:09,546 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797257951] [2019-10-13 23:27:09,546 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155701275] [2019-10-13 23:27:09,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:09,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 23:27:09,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:09,741 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-13 23:27:09,741 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:09,952 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-13 23:27:09,952 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:27:09,953 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [8] total 10 [2019-10-13 23:27:09,953 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065441402] [2019-10-13 23:27:09,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:09,954 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:09,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:09,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:27:09,955 INFO L87 Difference]: Start difference. First operand 835 states and 1057 transitions. Second operand 4 states. [2019-10-13 23:27:10,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:10,142 INFO L93 Difference]: Finished difference Result 1465 states and 1845 transitions. [2019-10-13 23:27:10,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:10,143 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 156 [2019-10-13 23:27:10,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:10,151 INFO L225 Difference]: With dead ends: 1465 [2019-10-13 23:27:10,151 INFO L226 Difference]: Without dead ends: 1049 [2019-10-13 23:27:10,154 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 305 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 23:27:10,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2019-10-13 23:27:10,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 1049. [2019-10-13 23:27:10,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1049 states. [2019-10-13 23:27:10,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1275 transitions. [2019-10-13 23:27:10,232 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1275 transitions. Word has length 156 [2019-10-13 23:27:10,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:10,233 INFO L462 AbstractCegarLoop]: Abstraction has 1049 states and 1275 transitions. [2019-10-13 23:27:10,233 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:10,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1275 transitions. [2019-10-13 23:27:10,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-10-13 23:27:10,240 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:10,241 INFO L380 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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 23:27:10,448 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:10,449 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:10,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:10,449 INFO L82 PathProgramCache]: Analyzing trace with hash 649083913, now seen corresponding path program 1 times [2019-10-13 23:27:10,450 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:10,450 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115900972] [2019-10-13 23:27:10,451 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:10,451 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:10,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:10,641 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 42 proven. 23 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-13 23:27:10,642 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115900972] [2019-10-13 23:27:10,642 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598193356] [2019-10-13 23:27:10,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:10,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 23:27:10,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-13 23:27:10,952 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:11,250 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 43 proven. 6 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2019-10-13 23:27:11,250 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:27:11,251 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 4] total 12 [2019-10-13 23:27:11,251 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304870113] [2019-10-13 23:27:11,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 23:27:11,252 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:11,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 23:27:11,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:27:11,253 INFO L87 Difference]: Start difference. First operand 1049 states and 1275 transitions. Second operand 6 states. [2019-10-13 23:27:11,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:11,719 INFO L93 Difference]: Finished difference Result 1698 states and 2107 transitions. [2019-10-13 23:27:11,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 23:27:11,720 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 216 [2019-10-13 23:27:11,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:11,731 INFO L225 Difference]: With dead ends: 1698 [2019-10-13 23:27:11,732 INFO L226 Difference]: Without dead ends: 1163 [2019-10-13 23:27:11,736 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 434 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2019-10-13 23:27:11,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2019-10-13 23:27:11,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1163. [2019-10-13 23:27:11,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1163 states. [2019-10-13 23:27:11,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1377 transitions. [2019-10-13 23:27:11,828 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1377 transitions. Word has length 216 [2019-10-13 23:27:11,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:11,830 INFO L462 AbstractCegarLoop]: Abstraction has 1163 states and 1377 transitions. [2019-10-13 23:27:11,830 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 23:27:11,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1377 transitions. [2019-10-13 23:27:11,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-10-13 23:27:11,837 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:11,838 INFO L380 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2019-10-13 23:27:12,043 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:12,044 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:12,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:12,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1682498760, now seen corresponding path program 1 times [2019-10-13 23:27:12,045 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:12,046 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053065584] [2019-10-13 23:27:12,046 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:12,046 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:12,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:12,148 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-10-13 23:27:12,149 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053065584] [2019-10-13 23:27:12,149 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996103598] [2019-10-13 23:27:12,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:12,406 INFO L256 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:27:12,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-13 23:27:12,449 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-10-13 23:27:12,644 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:27:12,644 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 4 [2019-10-13 23:27:12,644 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754937096] [2019-10-13 23:27:12,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:27:12,645 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:12,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:27:12,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:12,646 INFO L87 Difference]: Start difference. First operand 1163 states and 1377 transitions. Second operand 3 states. [2019-10-13 23:27:12,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:12,719 INFO L93 Difference]: Finished difference Result 1765 states and 2154 transitions. [2019-10-13 23:27:12,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:27:12,720 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2019-10-13 23:27:12,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:12,727 INFO L225 Difference]: With dead ends: 1765 [2019-10-13 23:27:12,728 INFO L226 Difference]: Without dead ends: 1169 [2019-10-13 23:27:12,732 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 433 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 23:27:12,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2019-10-13 23:27:12,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1155. [2019-10-13 23:27:12,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1155 states. [2019-10-13 23:27:12,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 1343 transitions. [2019-10-13 23:27:12,811 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 1343 transitions. Word has length 216 [2019-10-13 23:27:12,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:12,812 INFO L462 AbstractCegarLoop]: Abstraction has 1155 states and 1343 transitions. [2019-10-13 23:27:12,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:27:12,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 1343 transitions. [2019-10-13 23:27:12,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-10-13 23:27:12,818 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:12,818 INFO L380 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:13,033 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:13,034 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:13,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:13,034 INFO L82 PathProgramCache]: Analyzing trace with hash 946266268, now seen corresponding path program 1 times [2019-10-13 23:27:13,035 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:13,037 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925086658] [2019-10-13 23:27:13,037 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:13,037 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:13,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 42 proven. 23 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2019-10-13 23:27:13,229 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925086658] [2019-10-13 23:27:13,229 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000361313] [2019-10-13 23:27:13,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:13,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-13 23:27:13,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:13,562 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 117 proven. 4 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-13 23:27:13,562 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:13,782 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:27:13,880 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:27:13,881 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:27:13,898 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:27:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2019-10-13 23:27:13,973 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1991833000] [2019-10-13 23:27:14,002 INFO L162 IcfgInterpreter]: Started Sifa with 103 locations of interest [2019-10-13 23:27:14,003 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 23:27:14,010 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 23:27:14,017 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 23:27:14,017 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 23:27:14,263 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-13 23:27:14,298 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 83 for LOIs [2019-10-13 23:27:14,815 INFO L199 IcfgInterpreter]: Interpreting procedure init_model with input of size 53 for LOIs [2019-10-13 23:27:14,916 INFO L199 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 94 for LOIs [2019-10-13 23:27:17,468 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-10-13 23:27:17,478 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-10-13 23:27:17,861 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:17,863 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 23:27:17,872 INFO L168 Benchmark]: Toolchain (without parser) took 14361.58 ms. Allocated memory was 138.9 MB in the beginning and 624.4 MB in the end (delta: 485.5 MB). Free memory was 103.7 MB in the beginning and 404.5 MB in the end (delta: -300.7 MB). Peak memory consumption was 184.8 MB. Max. memory is 7.1 GB. [2019-10-13 23:27:17,873 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 138.9 MB. Free memory is still 121.8 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-10-13 23:27:17,874 INFO L168 Benchmark]: CACSL2BoogieTranslator took 490.88 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 103.3 MB in the beginning and 178.5 MB in the end (delta: -75.2 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2019-10-13 23:27:17,874 INFO L168 Benchmark]: Boogie Preprocessor took 64.56 ms. Allocated memory is still 202.9 MB. Free memory was 178.5 MB in the beginning and 176.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2019-10-13 23:27:17,875 INFO L168 Benchmark]: RCFGBuilder took 1130.60 ms. Allocated memory is still 202.9 MB. Free memory was 176.6 MB in the beginning and 102.3 MB in the end (delta: 74.3 MB). Peak memory consumption was 74.3 MB. Max. memory is 7.1 GB. [2019-10-13 23:27:17,876 INFO L168 Benchmark]: TraceAbstraction took 12664.04 ms. Allocated memory was 202.9 MB in the beginning and 624.4 MB in the end (delta: 421.5 MB). Free memory was 101.3 MB in the beginning and 404.5 MB in the end (delta: -303.1 MB). Peak memory consumption was 118.4 MB. Max. memory is 7.1 GB. [2019-10-13 23:27:17,880 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 138.9 MB. Free memory is still 121.8 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 490.88 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 103.3 MB in the beginning and 178.5 MB in the end (delta: -75.2 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 64.56 ms. Allocated memory is still 202.9 MB. Free memory was 178.5 MB in the beginning and 176.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1130.60 ms. Allocated memory is still 202.9 MB. Free memory was 176.6 MB in the beginning and 102.3 MB in the end (delta: 74.3 MB). Peak memory consumption was 74.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12664.04 ms. Allocated memory was 202.9 MB in the beginning and 624.4 MB in the end (delta: 421.5 MB). Free memory was 101.3 MB in the beginning and 404.5 MB in the end (delta: -303.1 MB). Peak memory consumption was 118.4 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...