java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/systemc/token_ring.02.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:26:58,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:26:58,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:26:58,998 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:26:58,999 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:26:59,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:26:59,001 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:26:59,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:26:59,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:26:59,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:26:59,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:26:59,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:26:59,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:26:59,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:26:59,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:26:59,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:26:59,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:26:59,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:26:59,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:26:59,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:26:59,019 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:26:59,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:26:59,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:26:59,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:26:59,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:26:59,028 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:26:59,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:26:59,032 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:26:59,032 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:26:59,036 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:26:59,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:26:59,037 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:26:59,038 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:26:59,039 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:26:59,043 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:26:59,043 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:26:59,044 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:26:59,044 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:26:59,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:26:59,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:26:59,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:26:59,051 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 23:26:59,075 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:26:59,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:26:59,078 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:26:59,078 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:26:59,078 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:26:59,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:26:59,079 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:26:59,079 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:26:59,079 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:26:59,079 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:26:59,080 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:26:59,080 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:26:59,081 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:26:59,081 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:26:59,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:26:59,082 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:26:59,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:26:59,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:26:59,082 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:26:59,082 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:26:59,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:26:59,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:26:59,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:26:59,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:26:59,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:26:59,084 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:26:59,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:26:59,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:26:59,084 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-13 23:26:59,418 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:26:59,430 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:26:59,433 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:26:59,435 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:26:59,435 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:26:59,436 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.02.cil-1.c [2019-10-13 23:26:59,499 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd5a5df55/a1270c7d2b864d65a49e70d6fdc2ba8e/FLAG4df503829 [2019-10-13 23:26:59,938 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:26:59,940 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/token_ring.02.cil-1.c [2019-10-13 23:26:59,954 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd5a5df55/a1270c7d2b864d65a49e70d6fdc2ba8e/FLAG4df503829 [2019-10-13 23:27:00,341 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd5a5df55/a1270c7d2b864d65a49e70d6fdc2ba8e [2019-10-13 23:27:00,351 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:27:00,353 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:27:00,354 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:27:00,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:27:00,358 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:27:00,359 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:27:00" (1/1) ... [2019-10-13 23:27:00,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4de72e79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:00, skipping insertion in model container [2019-10-13 23:27:00,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:27:00" (1/1) ... [2019-10-13 23:27:00,369 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:27:00,418 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:27:00,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:27:00,692 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:27:00,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:27:00,869 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:27:00,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:00 WrapperNode [2019-10-13 23:27:00,870 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:27:00,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:27:00,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:27:00,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:27:00,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:00" (1/1) ... [2019-10-13 23:27:00,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:00" (1/1) ... [2019-10-13 23:27:00,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:00" (1/1) ... [2019-10-13 23:27:00,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:00" (1/1) ... [2019-10-13 23:27:00,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:00" (1/1) ... [2019-10-13 23:27:00,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:00" (1/1) ... [2019-10-13 23:27:00,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:00" (1/1) ... [2019-10-13 23:27:00,930 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:27:00,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:27:00,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:27:00,930 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:27:00,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:27:00,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:27:00,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:27:00,997 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-13 23:27:00,998 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-10-13 23:27:00,998 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-10-13 23:27:00,998 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2019-10-13 23:27:00,999 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-10-13 23:27:01,000 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-10-13 23:27:01,000 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2019-10-13 23:27:01,000 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-10-13 23:27:01,000 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-13 23:27:01,002 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-13 23:27:01,002 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-13 23:27:01,002 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-10-13 23:27:01,002 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-10-13 23:27:01,002 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-10-13 23:27:01,005 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-10-13 23:27:01,005 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-10-13 23:27:01,005 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-10-13 23:27:01,005 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-13 23:27:01,005 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-13 23:27:01,006 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-13 23:27:01,006 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:27:01,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:27:01,006 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-13 23:27:01,006 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-10-13 23:27:01,006 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-10-13 23:27:01,006 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2019-10-13 23:27:01,007 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-10-13 23:27:01,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:27:01,007 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-10-13 23:27:01,007 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-10-13 23:27:01,007 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2019-10-13 23:27:01,007 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-10-13 23:27:01,008 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-13 23:27:01,008 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-13 23:27:01,008 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-13 23:27:01,008 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-10-13 23:27:01,008 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-10-13 23:27:01,008 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-10-13 23:27:01,008 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-10-13 23:27:01,009 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-10-13 23:27:01,009 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-13 23:27:01,009 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-13 23:27:01,009 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-13 23:27:01,009 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:27:01,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:27:01,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:27:02,037 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:27:02,038 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-13 23:27:02,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:27:02 BoogieIcfgContainer [2019-10-13 23:27:02,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:27:02,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:27:02,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:27:02,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:27:02,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:27:00" (1/3) ... [2019-10-13 23:27:02,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3399dcbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:27:02, skipping insertion in model container [2019-10-13 23:27:02,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:00" (2/3) ... [2019-10-13 23:27:02,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3399dcbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:27:02, skipping insertion in model container [2019-10-13 23:27:02,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:27:02" (3/3) ... [2019-10-13 23:27:02,058 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.02.cil-1.c [2019-10-13 23:27:02,072 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:27:02,082 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:27:02,095 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:27:02,130 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:27:02,131 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:27:02,131 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:27:02,131 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:27:02,131 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:27:02,132 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:27:02,132 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:27:02,132 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:27:02,152 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states. [2019-10-13 23:27:02,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-13 23:27:02,160 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:02,161 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] [2019-10-13 23:27:02,163 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:02,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:02,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1639965672, now seen corresponding path program 1 times [2019-10-13 23:27:02,180 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:02,180 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094670460] [2019-10-13 23:27:02,181 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:02,181 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:02,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:02,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:27:02,563 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094670460] [2019-10-13 23:27:02,564 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:02,565 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:27:02,565 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446932871] [2019-10-13 23:27:02,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:02,571 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:02,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:02,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:02,591 INFO L87 Difference]: Start difference. First operand 125 states. Second operand 4 states. [2019-10-13 23:27:03,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:03,054 INFO L93 Difference]: Finished difference Result 333 states and 452 transitions. [2019-10-13 23:27:03,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:03,057 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2019-10-13 23:27:03,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:03,081 INFO L225 Difference]: With dead ends: 333 [2019-10-13 23:27:03,082 INFO L226 Difference]: Without dead ends: 212 [2019-10-13 23:27:03,094 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 23:27:03,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-10-13 23:27:03,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2019-10-13 23:27:03,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-10-13 23:27:03,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 263 transitions. [2019-10-13 23:27:03,175 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 263 transitions. Word has length 63 [2019-10-13 23:27:03,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:03,175 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 263 transitions. [2019-10-13 23:27:03,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:03,176 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 263 transitions. [2019-10-13 23:27:03,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-13 23:27:03,184 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:03,185 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:03,187 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:03,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:03,188 INFO L82 PathProgramCache]: Analyzing trace with hash 849498777, now seen corresponding path program 1 times [2019-10-13 23:27:03,188 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:03,189 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359263703] [2019-10-13 23:27:03,189 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:03,189 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:03,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:03,413 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-13 23:27:03,414 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359263703] [2019-10-13 23:27:03,414 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930172060] [2019-10-13 23:27:03,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:03,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 23:27:03,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 23:27:03,710 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 23:27:03,871 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:27:03,872 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-10-13 23:27:03,872 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99197014] [2019-10-13 23:27:03,877 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:03,878 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:03,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:03,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:27:03,879 INFO L87 Difference]: Start difference. First operand 211 states and 263 transitions. Second operand 4 states. [2019-10-13 23:27:03,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:03,965 INFO L93 Difference]: Finished difference Result 375 states and 473 transitions. [2019-10-13 23:27:03,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:03,966 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2019-10-13 23:27:03,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:03,972 INFO L225 Difference]: With dead ends: 375 [2019-10-13 23:27:03,973 INFO L226 Difference]: Without dead ends: 274 [2019-10-13 23:27:03,974 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:27:03,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2019-10-13 23:27:04,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 232. [2019-10-13 23:27:04,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2019-10-13 23:27:04,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 295 transitions. [2019-10-13 23:27:04,020 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 295 transitions. Word has length 106 [2019-10-13 23:27:04,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:04,021 INFO L462 AbstractCegarLoop]: Abstraction has 232 states and 295 transitions. [2019-10-13 23:27:04,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:04,021 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 295 transitions. [2019-10-13 23:27:04,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-13 23:27:04,026 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:04,026 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:27:04,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:04,231 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:04,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:04,231 INFO L82 PathProgramCache]: Analyzing trace with hash -226352789, now seen corresponding path program 1 times [2019-10-13 23:27:04,232 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:04,232 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884777734] [2019-10-13 23:27:04,233 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:04,233 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:04,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:04,365 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-13 23:27:04,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884777734] [2019-10-13 23:27:04,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753323180] [2019-10-13 23:27:04,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:04,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:04,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 23:27:04,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:04,634 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-13 23:27:04,634 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:04,888 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-13 23:27:04,889 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:27:04,889 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2019-10-13 23:27:04,889 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141058265] [2019-10-13 23:27:04,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:27:04,890 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:04,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:27:04,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:27:04,891 INFO L87 Difference]: Start difference. First operand 232 states and 295 transitions. Second operand 3 states. [2019-10-13 23:27:04,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:04,940 INFO L93 Difference]: Finished difference Result 654 states and 861 transitions. [2019-10-13 23:27:04,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:27:04,941 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 140 [2019-10-13 23:27:04,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:04,946 INFO L225 Difference]: With dead ends: 654 [2019-10-13 23:27:04,946 INFO L226 Difference]: Without dead ends: 438 [2019-10-13 23:27:04,948 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 273 SyntacticMatches, 8 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:27:04,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2019-10-13 23:27:04,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 432. [2019-10-13 23:27:04,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 432 states. [2019-10-13 23:27:04,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 551 transitions. [2019-10-13 23:27:04,999 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 551 transitions. Word has length 140 [2019-10-13 23:27:04,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:05,000 INFO L462 AbstractCegarLoop]: Abstraction has 432 states and 551 transitions. [2019-10-13 23:27:05,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:27:05,000 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 551 transitions. [2019-10-13 23:27:05,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-13 23:27:05,006 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:05,007 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:27:05,207 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:05,208 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:05,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:05,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1178185681, now seen corresponding path program 1 times [2019-10-13 23:27:05,209 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:05,210 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219514492] [2019-10-13 23:27:05,210 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:05,210 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:05,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:05,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-10-13 23:27:05,340 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219514492] [2019-10-13 23:27:05,341 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854491869] [2019-10-13 23:27:05,341 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 23:27:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:05,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:27:05,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 23:27:05,564 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:05,728 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-13 23:27:05,728 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:27:05,729 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-13 23:27:05,729 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128870996] [2019-10-13 23:27:05,730 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:05,730 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:05,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:05,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:27:05,731 INFO L87 Difference]: Start difference. First operand 432 states and 551 transitions. Second operand 4 states. [2019-10-13 23:27:06,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:06,043 INFO L93 Difference]: Finished difference Result 1243 states and 1691 transitions. [2019-10-13 23:27:06,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:06,043 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-10-13 23:27:06,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:06,057 INFO L225 Difference]: With dead ends: 1243 [2019-10-13 23:27:06,058 INFO L226 Difference]: Without dead ends: 827 [2019-10-13 23:27:06,061 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:27:06,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2019-10-13 23:27:06,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 814. [2019-10-13 23:27:06,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 814 states. [2019-10-13 23:27:06,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1024 transitions. [2019-10-13 23:27:06,192 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1024 transitions. Word has length 140 [2019-10-13 23:27:06,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:06,201 INFO L462 AbstractCegarLoop]: Abstraction has 814 states and 1024 transitions. [2019-10-13 23:27:06,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:06,201 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1024 transitions. [2019-10-13 23:27:06,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-13 23:27:06,213 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:06,214 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:27:06,452 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:06,453 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:06,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:06,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1375141579, now seen corresponding path program 1 times [2019-10-13 23:27:06,455 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:06,455 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028043351] [2019-10-13 23:27:06,456 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:06,456 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:06,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:06,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-13 23:27:06,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028043351] [2019-10-13 23:27:06,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405041150] [2019-10-13 23:27:06,597 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 23:27:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:06,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 23:27:06,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:06,785 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 23:27:06,785 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:06,943 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-10-13 23:27:06,943 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:27:06,944 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 3] total 10 [2019-10-13 23:27:06,944 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309956541] [2019-10-13 23:27:06,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:27:06,945 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:06,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:27:06,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:27:06,945 INFO L87 Difference]: Start difference. First operand 814 states and 1024 transitions. Second operand 3 states. [2019-10-13 23:27:07,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:07,044 INFO L93 Difference]: Finished difference Result 1482 states and 1898 transitions. [2019-10-13 23:27:07,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:27:07,045 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 154 [2019-10-13 23:27:07,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:07,053 INFO L225 Difference]: With dead ends: 1482 [2019-10-13 23:27:07,053 INFO L226 Difference]: Without dead ends: 1070 [2019-10-13 23:27:07,056 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:27:07,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2019-10-13 23:27:07,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 895. [2019-10-13 23:27:07,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 895 states. [2019-10-13 23:27:07,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1134 transitions. [2019-10-13 23:27:07,116 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1134 transitions. Word has length 154 [2019-10-13 23:27:07,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:07,117 INFO L462 AbstractCegarLoop]: Abstraction has 895 states and 1134 transitions. [2019-10-13 23:27:07,117 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:27:07,117 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1134 transitions. [2019-10-13 23:27:07,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-13 23:27:07,122 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:07,122 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:27:07,326 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:07,327 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:07,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:07,327 INFO L82 PathProgramCache]: Analyzing trace with hash -881958040, now seen corresponding path program 1 times [2019-10-13 23:27:07,327 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:07,328 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308464463] [2019-10-13 23:27:07,328 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:07,328 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:07,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:07,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-13 23:27:07,431 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308464463] [2019-10-13 23:27:07,432 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695728279] [2019-10-13 23:27:07,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:27:07,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:07,591 INFO L256 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 23:27:07,595 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-13 23:27:07,637 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:07,867 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-13 23:27:07,868 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:27:07,868 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [8] total 10 [2019-10-13 23:27:07,868 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649441723] [2019-10-13 23:27:07,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:07,869 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:07,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:07,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:27:07,870 INFO L87 Difference]: Start difference. First operand 895 states and 1134 transitions. Second operand 4 states. [2019-10-13 23:27:08,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:08,063 INFO L93 Difference]: Finished difference Result 1546 states and 1950 transitions. [2019-10-13 23:27:08,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:08,064 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2019-10-13 23:27:08,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:08,071 INFO L225 Difference]: With dead ends: 1546 [2019-10-13 23:27:08,071 INFO L226 Difference]: Without dead ends: 1109 [2019-10-13 23:27:08,074 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 301 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:27:08,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2019-10-13 23:27:08,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1109. [2019-10-13 23:27:08,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1109 states. [2019-10-13 23:27:08,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1352 transitions. [2019-10-13 23:27:08,148 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1352 transitions. Word has length 154 [2019-10-13 23:27:08,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:08,149 INFO L462 AbstractCegarLoop]: Abstraction has 1109 states and 1352 transitions. [2019-10-13 23:27:08,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:08,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1352 transitions. [2019-10-13 23:27:08,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-13 23:27:08,154 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:08,155 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:27:08,359 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:08,359 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:08,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:08,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1931578956, now seen corresponding path program 2 times [2019-10-13 23:27:08,360 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:08,360 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306240444] [2019-10-13 23:27:08,360 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:08,361 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:08,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-10-13 23:27:08,456 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306240444] [2019-10-13 23:27:08,457 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666754712] [2019-10-13 23:27:08,457 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:08,630 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 23:27:08,630 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 23:27:08,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 60 conjunts are in the unsatisfiable core [2019-10-13 23:27:08,640 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:08,801 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 29 proven. 39 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-13 23:27:08,801 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:09,309 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2019-10-13 23:27:09,386 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-13 23:27:09,386 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:27:09,387 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 9] total 13 [2019-10-13 23:27:09,387 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030443567] [2019-10-13 23:27:09,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:09,388 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:09,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:09,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-10-13 23:27:09,388 INFO L87 Difference]: Start difference. First operand 1109 states and 1352 transitions. Second operand 4 states. [2019-10-13 23:27:09,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:09,590 INFO L93 Difference]: Finished difference Result 2040 states and 2512 transitions. [2019-10-13 23:27:09,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:09,591 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2019-10-13 23:27:09,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:09,605 INFO L225 Difference]: With dead ends: 2040 [2019-10-13 23:27:09,606 INFO L226 Difference]: Without dead ends: 1435 [2019-10-13 23:27:09,612 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 300 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-10-13 23:27:09,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2019-10-13 23:27:09,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1411. [2019-10-13 23:27:09,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1411 states. [2019-10-13 23:27:09,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 1662 transitions. [2019-10-13 23:27:09,730 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 1662 transitions. Word has length 154 [2019-10-13 23:27:09,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:09,731 INFO L462 AbstractCegarLoop]: Abstraction has 1411 states and 1662 transitions. [2019-10-13 23:27:09,731 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:09,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 1662 transitions. [2019-10-13 23:27:09,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-10-13 23:27:09,743 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:09,743 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:27:09,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:09,949 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:09,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:09,949 INFO L82 PathProgramCache]: Analyzing trace with hash 2051381126, now seen corresponding path program 1 times [2019-10-13 23:27:09,950 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:09,950 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520473564] [2019-10-13 23:27:09,950 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:09,950 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:09,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 42 proven. 8 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2019-10-13 23:27:10,109 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520473564] [2019-10-13 23:27:10,109 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633969624] [2019-10-13 23:27:10,110 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 23:27:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:10,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 1091 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:27:10,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-10-13 23:27:10,403 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-10-13 23:27:10,597 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:27:10,597 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [4] total 4 [2019-10-13 23:27:10,597 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163879701] [2019-10-13 23:27:10,599 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:10,599 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:10,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:10,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:10,600 INFO L87 Difference]: Start difference. First operand 1411 states and 1662 transitions. Second operand 4 states. [2019-10-13 23:27:10,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:10,876 INFO L93 Difference]: Finished difference Result 2166 states and 2638 transitions. [2019-10-13 23:27:10,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:10,876 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 214 [2019-10-13 23:27:10,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:10,885 INFO L225 Difference]: With dead ends: 2166 [2019-10-13 23:27:10,886 INFO L226 Difference]: Without dead ends: 1404 [2019-10-13 23:27:10,889 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 431 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 23:27:10,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2019-10-13 23:27:11,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1391. [2019-10-13 23:27:11,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1391 states. [2019-10-13 23:27:11,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 1612 transitions. [2019-10-13 23:27:11,014 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 1612 transitions. Word has length 214 [2019-10-13 23:27:11,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:11,015 INFO L462 AbstractCegarLoop]: Abstraction has 1391 states and 1612 transitions. [2019-10-13 23:27:11,015 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:11,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 1612 transitions. [2019-10-13 23:27:11,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-10-13 23:27:11,022 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:11,022 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 23:27:11,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:11,227 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:11,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:11,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1779210507, now seen corresponding path program 1 times [2019-10-13 23:27:11,228 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:11,228 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910482725] [2019-10-13 23:27:11,228 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:11,229 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:11,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:11,357 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 41 proven. 23 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2019-10-13 23:27:11,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910482725] [2019-10-13 23:27:11,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356522545] [2019-10-13 23:27:11,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:11,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-13 23:27:11,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 117 proven. 4 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-10-13 23:27:11,684 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:11,905 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:27:12,012 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:27:12,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:27:12,029 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:27:12,109 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2019-10-13 23:27:12,109 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1505322768] [2019-10-13 23:27:12,144 INFO L162 IcfgInterpreter]: Started Sifa with 102 locations of interest [2019-10-13 23:27:12,144 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 23:27:12,152 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 23:27:12,160 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 23:27:12,160 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 23:27:12,383 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-13 23:27:12,417 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 83 for LOIs [2019-10-13 23:27:12,881 INFO L199 IcfgInterpreter]: Interpreting procedure init_model with input of size 53 for LOIs [2019-10-13 23:27:12,941 INFO L199 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 98 for LOIs [2019-10-13 23:27:15,380 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-10-13 23:27:15,394 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-10-13 23:27:15,766 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:15,768 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 23:27:15,775 INFO L168 Benchmark]: Toolchain (without parser) took 15422.68 ms. Allocated memory was 138.4 MB in the beginning and 650.1 MB in the end (delta: 511.7 MB). Free memory was 101.9 MB in the beginning and 236.0 MB in the end (delta: -134.2 MB). Peak memory consumption was 377.6 MB. Max. memory is 7.1 GB. [2019-10-13 23:27:15,776 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.4 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 23:27:15,777 INFO L168 Benchmark]: CACSL2BoogieTranslator took 516.76 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 101.7 MB in the beginning and 176.8 MB in the end (delta: -75.2 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2019-10-13 23:27:15,778 INFO L168 Benchmark]: Boogie Preprocessor took 58.79 ms. Allocated memory is still 200.8 MB. Free memory was 176.8 MB in the beginning and 174.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2019-10-13 23:27:15,779 INFO L168 Benchmark]: RCFGBuilder took 1109.77 ms. Allocated memory is still 200.8 MB. Free memory was 174.5 MB in the beginning and 103.7 MB in the end (delta: 70.8 MB). Peak memory consumption was 70.8 MB. Max. memory is 7.1 GB. [2019-10-13 23:27:15,780 INFO L168 Benchmark]: TraceAbstraction took 13730.15 ms. Allocated memory was 200.8 MB in the beginning and 650.1 MB in the end (delta: 449.3 MB). Free memory was 103.7 MB in the beginning and 236.0 MB in the end (delta: -132.4 MB). Peak memory consumption was 317.0 MB. Max. memory is 7.1 GB. [2019-10-13 23:27:15,783 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.4 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 516.76 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 101.7 MB in the beginning and 176.8 MB in the end (delta: -75.2 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 58.79 ms. Allocated memory is still 200.8 MB. Free memory was 176.8 MB in the beginning and 174.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1109.77 ms. Allocated memory is still 200.8 MB. Free memory was 174.5 MB in the beginning and 103.7 MB in the end (delta: 70.8 MB). Peak memory consumption was 70.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13730.15 ms. Allocated memory was 200.8 MB in the beginning and 650.1 MB in the end (delta: 449.3 MB). Free memory was 103.7 MB in the beginning and 236.0 MB in the end (delta: -132.4 MB). Peak memory consumption was 317.0 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:307) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...