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.03.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 17:14:41,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 17:14:41,673 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 17:14:41,692 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 17:14:41,692 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 17:14:41,694 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 17:14:41,696 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 17:14:41,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 17:14:41,706 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 17:14:41,707 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 17:14:41,708 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 17:14:41,709 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 17:14:41,710 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 17:14:41,710 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 17:14:41,711 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 17:14:41,713 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 17:14:41,714 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 17:14:41,715 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 17:14:41,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 17:14:41,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 17:14:41,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 17:14:41,724 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 17:14:41,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 17:14:41,725 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 17:14:41,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-07 17:14:41,732 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-07 17:14:41,732 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-07 17:14:41,733 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-07 17:14:41,733 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-07 17:14:41,734 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-07 17:14:41,734 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 17:14:41,735 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 17:14:41,736 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 17:14:41,737 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 17:14:41,738 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 17:14:41,738 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 17:14:41,739 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 17:14:41,739 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 17:14:41,739 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 17:14:41,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 17:14:41,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 17:14:41,741 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 17:14:41,755 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 17:14:41,755 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 17:14:41,757 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 17:14:41,757 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 17:14:41,757 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 17:14:41,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 17:14:41,757 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 17:14:41,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 17:14:41,758 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 17:14:41,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 17:14:41,758 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 17:14:41,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 17:14:41,759 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 17:14:41,759 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 17:14:41,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 17:14:41,759 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 17:14:41,759 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 17:14:41,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 17:14:41,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 17:14:41,760 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 17:14:41,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 17:14:41,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 17:14:41,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 17:14:41,761 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 17:14:41,761 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 17:14:41,761 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 17:14:41,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 17:14:41,762 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 17:14:41,762 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 17:14:42,047 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 17:14:42,060 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 17:14:42,063 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 17:14:42,065 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 17:14:42,065 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 17:14:42,066 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.03.cil-2.c [2019-10-07 17:14:42,126 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e85fc0aa/9af932ea24fe4deca25bf13426ac3963/FLAGa8c241e16 [2019-10-07 17:14:42,580 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 17:14:42,581 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/token_ring.03.cil-2.c [2019-10-07 17:14:42,596 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e85fc0aa/9af932ea24fe4deca25bf13426ac3963/FLAGa8c241e16 [2019-10-07 17:14:42,952 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e85fc0aa/9af932ea24fe4deca25bf13426ac3963 [2019-10-07 17:14:42,962 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 17:14:42,963 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 17:14:42,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 17:14:42,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 17:14:42,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 17:14:42,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 05:14:42" (1/1) ... [2019-10-07 17:14:42,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cc444e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:42, skipping insertion in model container [2019-10-07 17:14:42,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 05:14:42" (1/1) ... [2019-10-07 17:14:42,979 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 17:14:43,038 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 17:14:43,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 17:14:43,288 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 17:14:43,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 17:14:43,460 INFO L192 MainTranslator]: Completed translation [2019-10-07 17:14:43,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:43 WrapperNode [2019-10-07 17:14:43,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 17:14:43,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 17:14:43,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 17:14:43,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 17:14:43,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:43" (1/1) ... [2019-10-07 17:14:43,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:43" (1/1) ... [2019-10-07 17:14:43,480 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:43" (1/1) ... [2019-10-07 17:14:43,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:43" (1/1) ... [2019-10-07 17:14:43,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:43" (1/1) ... [2019-10-07 17:14:43,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:43" (1/1) ... [2019-10-07 17:14:43,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:43" (1/1) ... [2019-10-07 17:14:43,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 17:14:43,512 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 17:14:43,512 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 17:14:43,513 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 17:14:43,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:43" (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 17:14:43,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 17:14:43,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 17:14:43,573 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-07 17:14:43,573 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-10-07 17:14:43,573 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-10-07 17:14:43,573 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2019-10-07 17:14:43,573 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2019-10-07 17:14:43,573 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-10-07 17:14:43,574 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-10-07 17:14:43,574 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2019-10-07 17:14:43,574 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2019-10-07 17:14:43,574 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-10-07 17:14:43,574 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-07 17:14:43,574 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-07 17:14:43,575 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-07 17:14:43,575 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-10-07 17:14:43,575 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-10-07 17:14:43,575 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-10-07 17:14:43,575 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-10-07 17:14:43,576 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-10-07 17:14:43,576 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-10-07 17:14:43,576 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-07 17:14:43,576 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-07 17:14:43,576 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-07 17:14:43,576 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 17:14:43,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 17:14:43,577 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-07 17:14:43,577 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-10-07 17:14:43,577 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-10-07 17:14:43,577 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2019-10-07 17:14:43,577 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2019-10-07 17:14:43,578 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-10-07 17:14:43,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 17:14:43,578 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-10-07 17:14:43,578 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-10-07 17:14:43,578 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2019-10-07 17:14:43,578 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2019-10-07 17:14:43,578 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-10-07 17:14:43,579 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-07 17:14:43,579 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-07 17:14:43,579 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-07 17:14:43,579 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-10-07 17:14:43,579 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-10-07 17:14:43,579 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-10-07 17:14:43,580 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-10-07 17:14:43,580 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-10-07 17:14:43,580 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-07 17:14:43,580 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-07 17:14:43,580 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-07 17:14:43,580 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 17:14:43,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 17:14:43,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 17:14:44,650 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 17:14:44,650 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-07 17:14:44,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 05:14:44 BoogieIcfgContainer [2019-10-07 17:14:44,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 17:14:44,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 17:14:44,653 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 17:14:44,656 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 17:14:44,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 05:14:42" (1/3) ... [2019-10-07 17:14:44,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f78b631 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 05:14:44, skipping insertion in model container [2019-10-07 17:14:44,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:43" (2/3) ... [2019-10-07 17:14:44,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f78b631 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 05:14:44, skipping insertion in model container [2019-10-07 17:14:44,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 05:14:44" (3/3) ... [2019-10-07 17:14:44,660 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.03.cil-2.c [2019-10-07 17:14:44,670 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 17:14:44,678 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 17:14:44,689 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 17:14:44,716 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 17:14:44,717 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 17:14:44,717 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 17:14:44,717 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 17:14:44,719 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 17:14:44,719 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 17:14:44,720 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 17:14:44,720 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 17:14:44,747 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states. [2019-10-07 17:14:44,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-07 17:14:44,757 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:44,758 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:14:44,760 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:44,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:44,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1525413467, now seen corresponding path program 1 times [2019-10-07 17:14:44,775 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:44,775 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:44,776 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:44,776 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:44,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:44,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:45,188 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 17:14:45,189 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:45,190 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:14:45,190 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 17:14:45,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:14:45,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:14:45,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 17:14:45,216 INFO L87 Difference]: Start difference. First operand 142 states. Second operand 3 states. [2019-10-07 17:14:45,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:45,390 INFO L93 Difference]: Finished difference Result 384 states and 529 transitions. [2019-10-07 17:14:45,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:14:45,392 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2019-10-07 17:14:45,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:45,409 INFO L225 Difference]: With dead ends: 384 [2019-10-07 17:14:45,409 INFO L226 Difference]: Without dead ends: 246 [2019-10-07 17:14:45,415 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 17:14:45,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2019-10-07 17:14:45,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2019-10-07 17:14:45,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2019-10-07 17:14:45,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 326 transitions. [2019-10-07 17:14:45,499 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 326 transitions. Word has length 70 [2019-10-07 17:14:45,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:45,500 INFO L462 AbstractCegarLoop]: Abstraction has 245 states and 326 transitions. [2019-10-07 17:14:45,500 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:14:45,501 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 326 transitions. [2019-10-07 17:14:45,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-07 17:14:45,508 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:45,509 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-07 17:14:45,509 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:45,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:45,509 INFO L82 PathProgramCache]: Analyzing trace with hash 792150009, now seen corresponding path program 1 times [2019-10-07 17:14:45,510 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:45,510 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:45,510 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:45,510 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:45,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:45,699 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-07 17:14:45,700 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:45,700 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:14:45,700 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 17:14:45,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:14:45,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:14:45,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:14:45,708 INFO L87 Difference]: Start difference. First operand 245 states and 326 transitions. Second operand 4 states. [2019-10-07 17:14:45,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:45,897 INFO L93 Difference]: Finished difference Result 632 states and 884 transitions. [2019-10-07 17:14:45,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:14:45,898 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 121 [2019-10-07 17:14:45,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:45,914 INFO L225 Difference]: With dead ends: 632 [2019-10-07 17:14:45,914 INFO L226 Difference]: Without dead ends: 404 [2019-10-07 17:14:45,925 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 17:14:45,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2019-10-07 17:14:46,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 365. [2019-10-07 17:14:46,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2019-10-07 17:14:46,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 514 transitions. [2019-10-07 17:14:46,019 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 514 transitions. Word has length 121 [2019-10-07 17:14:46,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:46,020 INFO L462 AbstractCegarLoop]: Abstraction has 365 states and 514 transitions. [2019-10-07 17:14:46,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:14:46,020 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 514 transitions. [2019-10-07 17:14:46,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-07 17:14:46,036 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:46,037 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2019-10-07 17:14:46,037 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:46,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:46,038 INFO L82 PathProgramCache]: Analyzing trace with hash 2121133127, now seen corresponding path program 1 times [2019-10-07 17:14:46,038 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:46,039 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:46,040 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:46,040 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:46,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:46,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-10-07 17:14:46,276 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:46,276 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:46,276 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 17:14:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:46,485 INFO L256 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 17:14:46,504 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:46,566 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-07 17:14:46,566 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:46,838 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-07 17:14:46,839 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 17:14:46,839 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-07 17:14:46,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:14:46,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:14:46,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-07 17:14:46,843 INFO L87 Difference]: Start difference. First operand 365 states and 514 transitions. Second operand 4 states. [2019-10-07 17:14:47,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:47,132 INFO L93 Difference]: Finished difference Result 1047 states and 1617 transitions. [2019-10-07 17:14:47,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:14:47,132 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2019-10-07 17:14:47,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:47,139 INFO L225 Difference]: With dead ends: 1047 [2019-10-07 17:14:47,139 INFO L226 Difference]: Without dead ends: 698 [2019-10-07 17:14:47,142 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-07 17:14:47,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2019-10-07 17:14:47,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 677. [2019-10-07 17:14:47,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 677 states. [2019-10-07 17:14:47,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 944 transitions. [2019-10-07 17:14:47,202 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 944 transitions. Word has length 162 [2019-10-07 17:14:47,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:47,203 INFO L462 AbstractCegarLoop]: Abstraction has 677 states and 944 transitions. [2019-10-07 17:14:47,203 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:14:47,203 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 944 transitions. [2019-10-07 17:14:47,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-07 17:14:47,210 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:47,210 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2019-10-07 17:14:47,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:47,420 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:47,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:47,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1593060905, now seen corresponding path program 1 times [2019-10-07 17:14:47,421 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:47,422 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:47,422 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:47,422 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:47,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:47,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-07 17:14:47,573 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:47,573 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:47,573 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 17:14:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:47,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 17:14:47,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-07 17:14:47,811 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-07 17:14:48,055 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 17:14:48,055 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-07 17:14:48,056 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:14:48,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:14:48,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-07 17:14:48,057 INFO L87 Difference]: Start difference. First operand 677 states and 944 transitions. Second operand 4 states. [2019-10-07 17:14:48,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:48,342 INFO L93 Difference]: Finished difference Result 1968 states and 3001 transitions. [2019-10-07 17:14:48,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:14:48,343 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2019-10-07 17:14:48,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:48,354 INFO L225 Difference]: With dead ends: 1968 [2019-10-07 17:14:48,354 INFO L226 Difference]: Without dead ends: 1307 [2019-10-07 17:14:48,360 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-07 17:14:48,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2019-10-07 17:14:48,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1278. [2019-10-07 17:14:48,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1278 states. [2019-10-07 17:14:48,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 1760 transitions. [2019-10-07 17:14:48,448 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 1760 transitions. Word has length 162 [2019-10-07 17:14:48,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:48,449 INFO L462 AbstractCegarLoop]: Abstraction has 1278 states and 1760 transitions. [2019-10-07 17:14:48,449 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:14:48,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 1760 transitions. [2019-10-07 17:14:48,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-07 17:14:48,455 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:48,455 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2019-10-07 17:14:48,662 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:48,662 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:48,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:48,663 INFO L82 PathProgramCache]: Analyzing trace with hash -2050703469, now seen corresponding path program 1 times [2019-10-07 17:14:48,663 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:48,663 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:48,663 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:48,664 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:48,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:48,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-07 17:14:48,810 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:48,810 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:48,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:48,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:48,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 17:14:49,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:49,042 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-07 17:14:49,043 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:49,205 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-07 17:14:49,206 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 17:14:49,206 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-07 17:14:49,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:14:49,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:14:49,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-07 17:14:49,207 INFO L87 Difference]: Start difference. First operand 1278 states and 1760 transitions. Second operand 4 states. [2019-10-07 17:14:49,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:49,583 INFO L93 Difference]: Finished difference Result 3740 states and 5633 transitions. [2019-10-07 17:14:49,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:14:49,588 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2019-10-07 17:14:49,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:49,605 INFO L225 Difference]: With dead ends: 3740 [2019-10-07 17:14:49,606 INFO L226 Difference]: Without dead ends: 2478 [2019-10-07 17:14:49,616 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-07 17:14:49,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2019-10-07 17:14:49,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 2433. [2019-10-07 17:14:49,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2433 states. [2019-10-07 17:14:49,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 3310 transitions. [2019-10-07 17:14:49,792 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 3310 transitions. Word has length 162 [2019-10-07 17:14:49,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:49,793 INFO L462 AbstractCegarLoop]: Abstraction has 2433 states and 3310 transitions. [2019-10-07 17:14:49,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:14:49,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 3310 transitions. [2019-10-07 17:14:49,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-07 17:14:49,806 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:49,806 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:14:50,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:50,019 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:50,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:50,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1445260331, now seen corresponding path program 1 times [2019-10-07 17:14:50,020 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:50,020 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:50,020 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:50,021 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:50,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-10-07 17:14:50,187 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:50,188 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:50,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:50,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-07 17:14:50,415 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:50,508 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-07 17:14:50,509 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-10-07 17:14:50,672 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:14:50,672 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 3] total 10 [2019-10-07 17:14:50,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:14:50,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:14:50,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-07 17:14:50,674 INFO L87 Difference]: Start difference. First operand 2433 states and 3310 transitions. Second operand 3 states. [2019-10-07 17:14:50,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:50,856 INFO L93 Difference]: Finished difference Result 4518 states and 6297 transitions. [2019-10-07 17:14:50,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:14:50,857 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 177 [2019-10-07 17:14:50,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:50,880 INFO L225 Difference]: With dead ends: 4518 [2019-10-07 17:14:50,881 INFO L226 Difference]: Without dead ends: 3315 [2019-10-07 17:14:50,892 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-07 17:14:50,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2019-10-07 17:14:51,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 2793. [2019-10-07 17:14:51,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2793 states. [2019-10-07 17:14:51,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2793 states to 2793 states and 3820 transitions. [2019-10-07 17:14:51,110 INFO L78 Accepts]: Start accepts. Automaton has 2793 states and 3820 transitions. Word has length 177 [2019-10-07 17:14:51,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:51,111 INFO L462 AbstractCegarLoop]: Abstraction has 2793 states and 3820 transitions. [2019-10-07 17:14:51,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:14:51,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2793 states and 3820 transitions. [2019-10-07 17:14:51,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-07 17:14:51,125 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:51,126 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:14:51,339 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:51,339 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:51,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:51,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1912388343, now seen corresponding path program 1 times [2019-10-07 17:14:51,340 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:51,340 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:51,341 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:51,341 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:51,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:51,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:51,506 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-10-07 17:14:51,507 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:51,507 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:51,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:51,710 INFO L256 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-07 17:14:51,715 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-07 17:14:51,746 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-10-07 17:14:51,920 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:14:51,920 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 3] total 10 [2019-10-07 17:14:51,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:14:51,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:14:51,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-07 17:14:51,921 INFO L87 Difference]: Start difference. First operand 2793 states and 3820 transitions. Second operand 3 states. [2019-10-07 17:14:52,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:52,092 INFO L93 Difference]: Finished difference Result 5114 states and 7175 transitions. [2019-10-07 17:14:52,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:14:52,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 177 [2019-10-07 17:14:52,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:52,118 INFO L225 Difference]: With dead ends: 5114 [2019-10-07 17:14:52,118 INFO L226 Difference]: Without dead ends: 3758 [2019-10-07 17:14:52,132 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-07 17:14:52,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3758 states. [2019-10-07 17:14:52,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3758 to 3296. [2019-10-07 17:14:52,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3296 states. [2019-10-07 17:14:52,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3296 states to 3296 states and 4520 transitions. [2019-10-07 17:14:52,401 INFO L78 Accepts]: Start accepts. Automaton has 3296 states and 4520 transitions. Word has length 177 [2019-10-07 17:14:52,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:52,402 INFO L462 AbstractCegarLoop]: Abstraction has 3296 states and 4520 transitions. [2019-10-07 17:14:52,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:14:52,403 INFO L276 IsEmpty]: Start isEmpty. Operand 3296 states and 4520 transitions. [2019-10-07 17:14:52,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2019-10-07 17:14:52,417 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:52,418 INFO L385 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:14:52,622 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:52,623 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:52,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:52,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1945516746, now seen corresponding path program 1 times [2019-10-07 17:14:52,623 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:52,624 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:52,624 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:52,624 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:52,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-10-07 17:14:52,788 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:52,788 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:52,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:53,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 1344 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-07 17:14:53,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2019-10-07 17:14:53,249 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:53,646 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2019-10-07 17:14:53,646 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 17:14:53,647 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [7] total 9 [2019-10-07 17:14:53,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:14:53,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:14:53,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-07 17:14:53,650 INFO L87 Difference]: Start difference. First operand 3296 states and 4520 transitions. Second operand 4 states. [2019-10-07 17:14:53,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:53,950 INFO L93 Difference]: Finished difference Result 5418 states and 7528 transitions. [2019-10-07 17:14:53,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:14:53,951 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 244 [2019-10-07 17:14:53,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:53,976 INFO L225 Difference]: With dead ends: 5418 [2019-10-07 17:14:53,976 INFO L226 Difference]: Without dead ends: 3850 [2019-10-07 17:14:53,993 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 486 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-07 17:14:53,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2019-10-07 17:14:54,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 3850. [2019-10-07 17:14:54,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3850 states. [2019-10-07 17:14:54,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3850 states to 3850 states and 5105 transitions. [2019-10-07 17:14:54,299 INFO L78 Accepts]: Start accepts. Automaton has 3850 states and 5105 transitions. Word has length 244 [2019-10-07 17:14:54,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:54,300 INFO L462 AbstractCegarLoop]: Abstraction has 3850 states and 5105 transitions. [2019-10-07 17:14:54,300 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:14:54,300 INFO L276 IsEmpty]: Start isEmpty. Operand 3850 states and 5105 transitions. [2019-10-07 17:14:54,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2019-10-07 17:14:54,328 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:54,328 INFO L385 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:14:54,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:54,535 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:54,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:54,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1965988107, now seen corresponding path program 1 times [2019-10-07 17:14:54,536 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:54,536 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:54,536 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:54,537 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:54,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:54,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-10-07 17:14:54,778 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:54,778 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:54,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:55,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 1344 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-07 17:14:55,059 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-07 17:14:55,147 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:55,450 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 43 proven. 6 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2019-10-07 17:14:55,450 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:14:55,451 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 4] total 12 [2019-10-07 17:14:55,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 17:14:55,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 17:14:55,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2019-10-07 17:14:55,452 INFO L87 Difference]: Start difference. First operand 3850 states and 5105 transitions. Second operand 6 states. [2019-10-07 17:14:56,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:56,106 INFO L93 Difference]: Finished difference Result 6223 states and 8469 transitions. [2019-10-07 17:14:56,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 17:14:56,106 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 244 [2019-10-07 17:14:56,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:56,133 INFO L225 Difference]: With dead ends: 6223 [2019-10-07 17:14:56,133 INFO L226 Difference]: Without dead ends: 4187 [2019-10-07 17:14:56,150 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 490 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2019-10-07 17:14:56,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4187 states. [2019-10-07 17:14:56,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4187 to 4187. [2019-10-07 17:14:56,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4187 states. [2019-10-07 17:14:56,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4187 states to 4187 states and 5447 transitions. [2019-10-07 17:14:56,388 INFO L78 Accepts]: Start accepts. Automaton has 4187 states and 5447 transitions. Word has length 244 [2019-10-07 17:14:56,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:56,388 INFO L462 AbstractCegarLoop]: Abstraction has 4187 states and 5447 transitions. [2019-10-07 17:14:56,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 17:14:56,389 INFO L276 IsEmpty]: Start isEmpty. Operand 4187 states and 5447 transitions. [2019-10-07 17:14:56,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2019-10-07 17:14:56,404 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:56,405 INFO L385 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:14:56,610 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:56,611 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:56,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:56,611 INFO L82 PathProgramCache]: Analyzing trace with hash 2043125902, now seen corresponding path program 1 times [2019-10-07 17:14:56,611 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:56,612 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:56,612 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:56,612 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:56,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:56,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:56,780 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2019-10-07 17:14:56,781 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:56,781 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:56,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:57,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:57,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 1342 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-07 17:14:57,085 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 139 proven. 4 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-10-07 17:14:57,271 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:57,500 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:14:57,586 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:14:57,587 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:14:57,606 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:14:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-10-07 17:14:57,666 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 17:14:57,740 INFO L162 IcfgInterpreter]: Started Sifa with 110 locations of interest [2019-10-07 17:14:57,740 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 17:14:57,752 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 17:14:57,764 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 17:14:57,765 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 17:14:58,124 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 67 for LOIs [2019-10-07 17:14:58,187 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 113 for LOIs [2019-10-07 17:14:58,812 INFO L199 IcfgInterpreter]: Interpreting procedure init_model with input of size 69 for LOIs [2019-10-07 17:14:58,879 INFO L199 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 122 for LOIs [2019-10-07 17:15:02,310 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-10-07 17:15:02,366 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-10-07 17:15:02,827 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:15:02,829 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 17:15:02,836 INFO L168 Benchmark]: Toolchain (without parser) took 19872.22 ms. Allocated memory was 145.8 MB in the beginning and 888.7 MB in the end (delta: 742.9 MB). Free memory was 103.3 MB in the beginning and 279.4 MB in the end (delta: -176.1 MB). Peak memory consumption was 566.9 MB. Max. memory is 7.1 GB. [2019-10-07 17:15:02,837 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 145.8 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 17:15:02,838 INFO L168 Benchmark]: CACSL2BoogieTranslator took 496.36 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 103.1 MB in the beginning and 178.2 MB in the end (delta: -75.0 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. [2019-10-07 17:15:02,839 INFO L168 Benchmark]: Boogie Preprocessor took 50.91 ms. Allocated memory is still 202.9 MB. Free memory was 178.2 MB in the beginning and 175.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2019-10-07 17:15:02,840 INFO L168 Benchmark]: RCFGBuilder took 1139.80 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 175.5 MB in the beginning and 203.1 MB in the end (delta: -27.7 MB). Peak memory consumption was 89.3 MB. Max. memory is 7.1 GB. [2019-10-07 17:15:02,841 INFO L168 Benchmark]: TraceAbstraction took 18180.68 ms. Allocated memory was 235.9 MB in the beginning and 888.7 MB in the end (delta: 652.7 MB). Free memory was 203.1 MB in the beginning and 279.4 MB in the end (delta: -76.3 MB). Peak memory consumption was 576.5 MB. Max. memory is 7.1 GB. [2019-10-07 17:15:02,846 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 145.8 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 496.36 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 103.1 MB in the beginning and 178.2 MB in the end (delta: -75.0 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 50.91 ms. Allocated memory is still 202.9 MB. Free memory was 178.2 MB in the beginning and 175.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1139.80 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 175.5 MB in the beginning and 203.1 MB in the end (delta: -27.7 MB). Peak memory consumption was 89.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 18180.68 ms. Allocated memory was 235.9 MB in the beginning and 888.7 MB in the end (delta: 652.7 MB). Free memory was 203.1 MB in the beginning and 279.4 MB in the end (delta: -76.3 MB). Peak memory consumption was 576.5 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...