java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/systemc/token_ring.01.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 17:14:11,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 17:14:11,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 17:14:11,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 17:14:11,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 17:14:11,993 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 17:14:11,995 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 17:14:12,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 17:14:12,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 17:14:12,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 17:14:12,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 17:14:12,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 17:14:12,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 17:14:12,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 17:14:12,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 17:14:12,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 17:14:12,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 17:14:12,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 17:14:12,026 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 17:14:12,030 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 17:14:12,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 17:14:12,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 17:14:12,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 17:14:12,040 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 17:14:12,042 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-07 17:14:12,042 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-07 17:14:12,043 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-07 17:14:12,044 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-07 17:14:12,046 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-07 17:14:12,047 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-07 17:14:12,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 17:14:12,047 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 17:14:12,048 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 17:14:12,049 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 17:14:12,050 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 17:14:12,050 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 17:14:12,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 17:14:12,051 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 17:14:12,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 17:14:12,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 17:14:12,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 17:14:12,053 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 17:14:12,066 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 17:14:12,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 17:14:12,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 17:14:12,068 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 17:14:12,068 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 17:14:12,068 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 17:14:12,069 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 17:14:12,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 17:14:12,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 17:14:12,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 17:14:12,069 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 17:14:12,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 17:14:12,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 17:14:12,070 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 17:14:12,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 17:14:12,070 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 17:14:12,070 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 17:14:12,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 17:14:12,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 17:14:12,071 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 17:14:12,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 17:14:12,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 17:14:12,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 17:14:12,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 17:14:12,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 17:14:12,072 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 17:14:12,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 17:14:12,072 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 17:14:12,073 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 17:14:12,346 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 17:14:12,359 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 17:14:12,363 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 17:14:12,365 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 17:14:12,365 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 17:14:12,366 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.01.cil-1.c [2019-10-07 17:14:12,428 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d77264706/f8e953b1aa8c4372a1b8703d97607c56/FLAGbfaf58c84 [2019-10-07 17:14:12,865 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 17:14:12,865 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/token_ring.01.cil-1.c [2019-10-07 17:14:12,874 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d77264706/f8e953b1aa8c4372a1b8703d97607c56/FLAGbfaf58c84 [2019-10-07 17:14:13,200 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d77264706/f8e953b1aa8c4372a1b8703d97607c56 [2019-10-07 17:14:13,210 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 17:14:13,212 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 17:14:13,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 17:14:13,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 17:14:13,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 17:14:13,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 05:14:13" (1/1) ... [2019-10-07 17:14:13,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68a621bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:13, skipping insertion in model container [2019-10-07 17:14:13,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 05:14:13" (1/1) ... [2019-10-07 17:14:13,228 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 17:14:13,279 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 17:14:13,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 17:14:13,530 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 17:14:13,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 17:14:13,664 INFO L192 MainTranslator]: Completed translation [2019-10-07 17:14:13,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:13 WrapperNode [2019-10-07 17:14:13,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 17:14:13,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 17:14:13,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 17:14:13,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 17:14:13,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:13" (1/1) ... [2019-10-07 17:14:13,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:13" (1/1) ... [2019-10-07 17:14:13,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:13" (1/1) ... [2019-10-07 17:14:13,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:13" (1/1) ... [2019-10-07 17:14:13,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:13" (1/1) ... [2019-10-07 17:14:13,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:13" (1/1) ... [2019-10-07 17:14:13,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:13" (1/1) ... [2019-10-07 17:14:13,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 17:14:13,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 17:14:13,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 17:14:13,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 17:14:13,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:13" (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 17:14:13,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 17:14:13,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 17:14:13,783 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-07 17:14:13,783 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-10-07 17:14:13,784 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-10-07 17:14:13,784 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-10-07 17:14:13,784 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-10-07 17:14:13,784 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-10-07 17:14:13,784 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-07 17:14:13,785 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-07 17:14:13,785 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-07 17:14:13,785 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-10-07 17:14:13,785 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-10-07 17:14:13,785 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-10-07 17:14:13,785 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-10-07 17:14:13,786 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-10-07 17:14:13,786 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-10-07 17:14:13,786 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-07 17:14:13,786 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-07 17:14:13,786 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-07 17:14:13,786 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 17:14:13,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 17:14:13,787 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-07 17:14:13,787 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-10-07 17:14:13,787 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-10-07 17:14:13,787 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-10-07 17:14:13,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 17:14:13,787 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-10-07 17:14:13,787 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-10-07 17:14:13,788 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-10-07 17:14:13,788 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-07 17:14:13,788 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-07 17:14:13,788 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-07 17:14:13,788 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-10-07 17:14:13,788 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-10-07 17:14:13,789 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-10-07 17:14:13,789 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-10-07 17:14:13,789 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-10-07 17:14:13,789 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-07 17:14:13,789 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-07 17:14:13,789 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-07 17:14:13,789 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 17:14:13,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 17:14:13,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 17:14:14,514 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 17:14:14,514 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-07 17:14:14,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 05:14:14 BoogieIcfgContainer [2019-10-07 17:14:14,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 17:14:14,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 17:14:14,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 17:14:14,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 17:14:14,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 05:14:13" (1/3) ... [2019-10-07 17:14:14,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b20a616 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 05:14:14, skipping insertion in model container [2019-10-07 17:14:14,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:13" (2/3) ... [2019-10-07 17:14:14,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b20a616 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 05:14:14, skipping insertion in model container [2019-10-07 17:14:14,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 05:14:14" (3/3) ... [2019-10-07 17:14:14,525 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.01.cil-1.c [2019-10-07 17:14:14,535 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 17:14:14,544 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 17:14:14,556 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 17:14:14,581 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 17:14:14,581 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 17:14:14,581 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 17:14:14,582 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 17:14:14,582 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 17:14:14,583 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 17:14:14,583 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 17:14:14,583 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 17:14:14,618 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states. [2019-10-07 17:14:14,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-07 17:14:14,631 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:14,632 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] [2019-10-07 17:14:14,635 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:14,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:14,643 INFO L82 PathProgramCache]: Analyzing trace with hash 458852481, now seen corresponding path program 1 times [2019-10-07 17:14:14,653 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:14,654 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:14,654 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:14,654 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:14,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:14,961 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 17:14:14,962 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:14,962 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:14:14,963 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 17:14:14,967 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:14:14,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:14:14,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:14:14,985 INFO L87 Difference]: Start difference. First operand 108 states. Second operand 4 states. [2019-10-07 17:14:15,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:15,376 INFO L93 Difference]: Finished difference Result 285 states and 379 transitions. [2019-10-07 17:14:15,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:14:15,378 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2019-10-07 17:14:15,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:15,403 INFO L225 Difference]: With dead ends: 285 [2019-10-07 17:14:15,404 INFO L226 Difference]: Without dead ends: 181 [2019-10-07 17:14:15,413 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 17:14:15,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-10-07 17:14:15,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2019-10-07 17:14:15,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-10-07 17:14:15,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 215 transitions. [2019-10-07 17:14:15,556 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 215 transitions. Word has length 56 [2019-10-07 17:14:15,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:15,557 INFO L462 AbstractCegarLoop]: Abstraction has 177 states and 215 transitions. [2019-10-07 17:14:15,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:14:15,558 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 215 transitions. [2019-10-07 17:14:15,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-07 17:14:15,564 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:15,564 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] [2019-10-07 17:14:15,565 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:15,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:15,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1097636960, now seen corresponding path program 1 times [2019-10-07 17:14:15,567 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:15,567 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:15,568 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:15,568 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:15,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:15,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:15,764 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 17:14:15,765 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:15,765 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:14:15,765 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 17:14:15,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:14:15,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:14:15,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 17:14:15,768 INFO L87 Difference]: Start difference. First operand 177 states and 215 transitions. Second operand 3 states. [2019-10-07 17:14:15,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:15,853 INFO L93 Difference]: Finished difference Result 487 states and 633 transitions. [2019-10-07 17:14:15,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:14:15,856 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2019-10-07 17:14:15,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:15,867 INFO L225 Difference]: With dead ends: 487 [2019-10-07 17:14:15,868 INFO L226 Difference]: Without dead ends: 326 [2019-10-07 17:14:15,872 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 17:14:15,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2019-10-07 17:14:15,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 324. [2019-10-07 17:14:15,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2019-10-07 17:14:15,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 408 transitions. [2019-10-07 17:14:15,950 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 408 transitions. Word has length 56 [2019-10-07 17:14:15,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:15,951 INFO L462 AbstractCegarLoop]: Abstraction has 324 states and 408 transitions. [2019-10-07 17:14:15,951 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:14:15,951 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 408 transitions. [2019-10-07 17:14:15,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-07 17:14:15,959 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:15,959 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:14:15,960 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:15,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:15,962 INFO L82 PathProgramCache]: Analyzing trace with hash -2069013347, now seen corresponding path program 1 times [2019-10-07 17:14:15,962 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:15,962 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:15,962 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:15,963 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:15,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-07 17:14:16,048 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:16,049 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:14:16,049 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 17:14:16,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:14:16,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:14:16,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:14:16,050 INFO L87 Difference]: Start difference. First operand 324 states and 408 transitions. Second operand 4 states. [2019-10-07 17:14:16,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:16,146 INFO L93 Difference]: Finished difference Result 841 states and 1087 transitions. [2019-10-07 17:14:16,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:14:16,147 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2019-10-07 17:14:16,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:16,152 INFO L225 Difference]: With dead ends: 841 [2019-10-07 17:14:16,152 INFO L226 Difference]: Without dead ends: 534 [2019-10-07 17:14:16,154 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:14:16,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2019-10-07 17:14:16,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 452. [2019-10-07 17:14:16,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 452 states. [2019-10-07 17:14:16,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 574 transitions. [2019-10-07 17:14:16,203 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 574 transitions. Word has length 91 [2019-10-07 17:14:16,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:16,204 INFO L462 AbstractCegarLoop]: Abstraction has 452 states and 574 transitions. [2019-10-07 17:14:16,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:14:16,204 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 574 transitions. [2019-10-07 17:14:16,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-07 17:14:16,210 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:16,210 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:14:16,211 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:16,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:16,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1882668428, now seen corresponding path program 1 times [2019-10-07 17:14:16,211 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:16,212 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:16,212 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:16,212 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:16,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:16,428 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-07 17:14:16,428 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:16,428 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:16,429 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 17:14:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:16,561 INFO L256 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-07 17:14:16,573 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-07 17:14:16,614 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:16,829 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-07 17:14:16,830 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 17:14:16,830 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [8] total 10 [2019-10-07 17:14:16,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:14:16,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:14:16,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-07 17:14:16,832 INFO L87 Difference]: Start difference. First operand 452 states and 574 transitions. Second operand 4 states. [2019-10-07 17:14:17,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:17,019 INFO L93 Difference]: Finished difference Result 740 states and 963 transitions. [2019-10-07 17:14:17,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:14:17,020 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2019-10-07 17:14:17,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:17,026 INFO L225 Difference]: With dead ends: 740 [2019-10-07 17:14:17,026 INFO L226 Difference]: Without dead ends: 526 [2019-10-07 17:14:17,028 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 255 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 17:14:17,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2019-10-07 17:14:17,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2019-10-07 17:14:17,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2019-10-07 17:14:17,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 651 transitions. [2019-10-07 17:14:17,084 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 651 transitions. Word has length 131 [2019-10-07 17:14:17,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:17,085 INFO L462 AbstractCegarLoop]: Abstraction has 526 states and 651 transitions. [2019-10-07 17:14:17,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:14:17,085 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 651 transitions. [2019-10-07 17:14:17,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-07 17:14:17,092 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:17,092 INFO L385 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:14:17,297 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:17,298 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:17,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:17,299 INFO L82 PathProgramCache]: Analyzing trace with hash 628789896, now seen corresponding path program 1 times [2019-10-07 17:14:17,300 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:17,301 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:17,301 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:17,302 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:17,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:17,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 38 proven. 19 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-10-07 17:14:17,499 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:17,499 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:17,499 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 17:14:17,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:17,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-07 17:14:17,661 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:17,811 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 95 proven. 4 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-07 17:14:17,811 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:18,075 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:14:18,161 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:14:18,161 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:14:18,176 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:14:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 29 proven. 18 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2019-10-07 17:14:18,217 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 17:14:18,246 INFO L162 IcfgInterpreter]: Started Sifa with 94 locations of interest [2019-10-07 17:14:18,247 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 17:14:18,254 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 17:14:18,262 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 17:14:18,263 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 17:14:18,461 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 37 for LOIs [2019-10-07 17:14:18,492 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 61 for LOIs [2019-10-07 17:14:18,815 INFO L199 IcfgInterpreter]: Interpreting procedure init_model with input of size 41 for LOIs [2019-10-07 17:14:18,864 INFO L199 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 68 for LOIs [2019-10-07 17:14:21,112 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:21,114 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 17:14:21,121 INFO L168 Benchmark]: Toolchain (without parser) took 7909.07 ms. Allocated memory was 137.4 MB in the beginning and 405.8 MB in the end (delta: 268.4 MB). Free memory was 101.7 MB in the beginning and 156.0 MB in the end (delta: -54.3 MB). Peak memory consumption was 214.1 MB. Max. memory is 7.1 GB. [2019-10-07 17:14:21,122 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 137.4 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 17:14:21,124 INFO L168 Benchmark]: CACSL2BoogieTranslator took 454.52 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 101.5 MB in the beginning and 178.6 MB in the end (delta: -77.2 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. [2019-10-07 17:14:21,124 INFO L168 Benchmark]: Boogie Preprocessor took 56.83 ms. Allocated memory is still 201.9 MB. Free memory was 178.6 MB in the beginning and 176.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-10-07 17:14:21,125 INFO L168 Benchmark]: RCFGBuilder took 791.21 ms. Allocated memory is still 201.9 MB. Free memory was 176.5 MB in the beginning and 123.0 MB in the end (delta: 53.5 MB). Peak memory consumption was 53.5 MB. Max. memory is 7.1 GB. [2019-10-07 17:14:21,126 INFO L168 Benchmark]: TraceAbstraction took 6601.71 ms. Allocated memory was 201.9 MB in the beginning and 405.8 MB in the end (delta: 203.9 MB). Free memory was 123.0 MB in the beginning and 156.0 MB in the end (delta: -32.9 MB). Peak memory consumption was 171.0 MB. Max. memory is 7.1 GB. [2019-10-07 17:14:21,130 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 137.4 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 454.52 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 101.5 MB in the beginning and 178.6 MB in the end (delta: -77.2 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 56.83 ms. Allocated memory is still 201.9 MB. Free memory was 178.6 MB in the beginning and 176.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 791.21 ms. Allocated memory is still 201.9 MB. Free memory was 176.5 MB in the beginning and 123.0 MB in the end (delta: 53.5 MB). Peak memory consumption was 53.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6601.71 ms. Allocated memory was 201.9 MB in the beginning and 405.8 MB in the end (delta: 203.9 MB). Free memory was 123.0 MB in the beginning and 156.0 MB in the end (delta: -32.9 MB). Peak memory consumption was 171.0 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...