java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/systemc/token_ring.02.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:31:56,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:31:56,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:31:56,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:31:56,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:31:56,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:31:56,613 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:31:56,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:31:56,627 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:31:56,627 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:31:56,629 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:31:56,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:31:56,631 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:31:56,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:31:56,637 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:31:56,638 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:31:56,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:31:56,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:31:56,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:31:56,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:31:56,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:31:56,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:31:56,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:31:56,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:31:56,663 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:31:56,663 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:31:56,664 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:31:56,664 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:31:56,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:31:56,668 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:31:56,668 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:31:56,669 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:31:56,670 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:31:56,670 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:31:56,672 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:31:56,672 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:31:56,673 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:31:56,673 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:31:56,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:31:56,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:31:56,676 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:31:56,677 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 [2019-10-15 03:31:56,696 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:31:56,696 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:31:56,701 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:31:56,701 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:31:56,702 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:31:56,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:31:56,702 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:31:56,702 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:31:56,703 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:31:56,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:31:56,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:31:56,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:31:56,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:31:56,705 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:31:56,705 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:31:56,705 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:31:56,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:31:56,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:31:56,706 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:31:56,706 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:31:56,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:31:56,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:31:56,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:31:56,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:31:56,707 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:31:56,707 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:31:56,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:31:56,708 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:31:56,708 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 [2019-10-15 03:31:57,014 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:31:57,027 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:31:57,031 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:31:57,033 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:31:57,033 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:31:57,034 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.02.cil-2.c [2019-10-15 03:31:57,095 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d91d9209/ebf703ebe308416b8324d6de2f4b5722/FLAG59961e89b [2019-10-15 03:31:57,558 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:31:57,559 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/token_ring.02.cil-2.c [2019-10-15 03:31:57,568 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d91d9209/ebf703ebe308416b8324d6de2f4b5722/FLAG59961e89b [2019-10-15 03:31:57,904 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d91d9209/ebf703ebe308416b8324d6de2f4b5722 [2019-10-15 03:31:57,922 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:31:57,924 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:31:57,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:31:57,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:31:57,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:31:57,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:31:57" (1/1) ... [2019-10-15 03:31:57,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@404140b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:57, skipping insertion in model container [2019-10-15 03:31:57,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:31:57" (1/1) ... [2019-10-15 03:31:57,941 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:31:57,997 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:31:58,234 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:31:58,240 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:31:58,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:31:58,394 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:31:58,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:58 WrapperNode [2019-10-15 03:31:58,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:31:58,395 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:31:58,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:31:58,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:31:58,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:58" (1/1) ... [2019-10-15 03:31:58,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:58" (1/1) ... [2019-10-15 03:31:58,414 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:58" (1/1) ... [2019-10-15 03:31:58,414 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:58" (1/1) ... [2019-10-15 03:31:58,424 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:58" (1/1) ... [2019-10-15 03:31:58,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:58" (1/1) ... [2019-10-15 03:31:58,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:58" (1/1) ... [2019-10-15 03:31:58,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:31:58,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:31:58,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:31:58,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:31:58,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:58" (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 [2019-10-15 03:31:58,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:31:58,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:31:58,496 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-15 03:31:58,497 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-10-15 03:31:58,497 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-10-15 03:31:58,497 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2019-10-15 03:31:58,497 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-10-15 03:31:58,497 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-10-15 03:31:58,497 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2019-10-15 03:31:58,498 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-10-15 03:31:58,498 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-15 03:31:58,498 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-15 03:31:58,498 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-15 03:31:58,498 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-10-15 03:31:58,498 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-10-15 03:31:58,499 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-10-15 03:31:58,499 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-10-15 03:31:58,499 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-10-15 03:31:58,499 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-10-15 03:31:58,499 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-15 03:31:58,500 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-15 03:31:58,500 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-15 03:31:58,500 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:31:58,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:31:58,500 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-15 03:31:58,500 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-10-15 03:31:58,501 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-10-15 03:31:58,501 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2019-10-15 03:31:58,501 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-10-15 03:31:58,501 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:31:58,501 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-10-15 03:31:58,501 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-10-15 03:31:58,502 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2019-10-15 03:31:58,502 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-10-15 03:31:58,502 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-15 03:31:58,502 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-15 03:31:58,502 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-15 03:31:58,502 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-10-15 03:31:58,503 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-10-15 03:31:58,503 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-10-15 03:31:58,503 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-10-15 03:31:58,503 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-10-15 03:31:58,503 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-15 03:31:58,503 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-15 03:31:58,503 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-15 03:31:58,504 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:31:58,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:31:58,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:31:59,442 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:31:59,442 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-15 03:31:59,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:31:59 BoogieIcfgContainer [2019-10-15 03:31:59,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:31:59,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:31:59,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:31:59,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:31:59,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:31:57" (1/3) ... [2019-10-15 03:31:59,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7615e723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:31:59, skipping insertion in model container [2019-10-15 03:31:59,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:58" (2/3) ... [2019-10-15 03:31:59,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7615e723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:31:59, skipping insertion in model container [2019-10-15 03:31:59,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:31:59" (3/3) ... [2019-10-15 03:31:59,453 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.02.cil-2.c [2019-10-15 03:31:59,462 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:31:59,471 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:31:59,481 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:31:59,508 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:31:59,509 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:31:59,509 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:31:59,509 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:31:59,509 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:31:59,510 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:31:59,510 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:31:59,523 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:31:59,559 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states. [2019-10-15 03:31:59,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-15 03:31:59,568 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:59,570 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:31:59,571 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:59,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:59,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1027832444, now seen corresponding path program 1 times [2019-10-15 03:31:59,582 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:59,583 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341476083] [2019-10-15 03:31:59,583 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:59,583 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:59,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:59,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:31:59,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341476083] [2019-10-15 03:31:59,915 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:59,916 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:31:59,916 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273286368] [2019-10-15 03:31:59,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:31:59,922 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:59,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:31:59,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:31:59,934 INFO L87 Difference]: Start difference. First operand 130 states. Second operand 4 states. [2019-10-15 03:32:00,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:00,315 INFO L93 Difference]: Finished difference Result 344 states and 471 transitions. [2019-10-15 03:32:00,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:00,317 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2019-10-15 03:32:00,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:00,341 INFO L225 Difference]: With dead ends: 344 [2019-10-15 03:32:00,342 INFO L226 Difference]: Without dead ends: 218 [2019-10-15 03:32:00,354 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 [2019-10-15 03:32:00,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-10-15 03:32:00,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2019-10-15 03:32:00,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-10-15 03:32:00,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 272 transitions. [2019-10-15 03:32:00,477 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 272 transitions. Word has length 64 [2019-10-15 03:32:00,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:00,478 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 272 transitions. [2019-10-15 03:32:00,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:00,478 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 272 transitions. [2019-10-15 03:32:00,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-15 03:32:00,484 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:00,485 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:00,485 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:00,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:00,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1647916486, now seen corresponding path program 1 times [2019-10-15 03:32:00,486 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:00,486 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925546666] [2019-10-15 03:32:00,486 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:00,486 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:00,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:00,649 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-15 03:32:00,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925546666] [2019-10-15 03:32:00,650 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330024235] [2019-10-15 03:32:00,650 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 [2019-10-15 03:32:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:00,832 INFO L256 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:32:00,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:00,891 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-15 03:32:00,891 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:01,003 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-15 03:32:01,004 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:32:01,004 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-10-15 03:32:01,005 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829036942] [2019-10-15 03:32:01,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:01,007 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:01,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:01,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:32:01,008 INFO L87 Difference]: Start difference. First operand 217 states and 272 transitions. Second operand 4 states. [2019-10-15 03:32:01,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:01,096 INFO L93 Difference]: Finished difference Result 386 states and 490 transitions. [2019-10-15 03:32:01,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:01,096 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2019-10-15 03:32:01,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:01,101 INFO L225 Difference]: With dead ends: 386 [2019-10-15 03:32:01,101 INFO L226 Difference]: Without dead ends: 280 [2019-10-15 03:32:01,103 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:32:01,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2019-10-15 03:32:01,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 238. [2019-10-15 03:32:01,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2019-10-15 03:32:01,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 304 transitions. [2019-10-15 03:32:01,134 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 304 transitions. Word has length 108 [2019-10-15 03:32:01,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:01,135 INFO L462 AbstractCegarLoop]: Abstraction has 238 states and 304 transitions. [2019-10-15 03:32:01,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:01,135 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 304 transitions. [2019-10-15 03:32:01,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-15 03:32:01,139 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:01,139 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:01,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:01,345 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:01,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:01,346 INFO L82 PathProgramCache]: Analyzing trace with hash 222884582, now seen corresponding path program 1 times [2019-10-15 03:32:01,346 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:01,346 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146341727] [2019-10-15 03:32:01,347 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:01,347 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:01,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-15 03:32:01,510 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146341727] [2019-10-15 03:32:01,510 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406552483] [2019-10-15 03:32:01,510 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 [2019-10-15 03:32:01,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:01,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 03:32:01,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:01,718 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-15 03:32:01,718 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:01,951 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-15 03:32:01,951 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:32:01,952 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2019-10-15 03:32:01,952 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472075149] [2019-10-15 03:32:01,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:32:01,953 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:01,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:32:01,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:32:01,954 INFO L87 Difference]: Start difference. First operand 238 states and 304 transitions. Second operand 3 states. [2019-10-15 03:32:02,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:02,012 INFO L93 Difference]: Finished difference Result 672 states and 888 transitions. [2019-10-15 03:32:02,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:32:02,014 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2019-10-15 03:32:02,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:02,023 INFO L225 Difference]: With dead ends: 672 [2019-10-15 03:32:02,023 INFO L226 Difference]: Without dead ends: 450 [2019-10-15 03:32:02,024 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 277 SyntacticMatches, 8 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:32:02,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2019-10-15 03:32:02,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 443. [2019-10-15 03:32:02,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2019-10-15 03:32:02,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 568 transitions. [2019-10-15 03:32:02,080 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 568 transitions. Word has length 142 [2019-10-15 03:32:02,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:02,081 INFO L462 AbstractCegarLoop]: Abstraction has 443 states and 568 transitions. [2019-10-15 03:32:02,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:32:02,081 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 568 transitions. [2019-10-15 03:32:02,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-15 03:32:02,093 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:02,093 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:02,297 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:02,297 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:02,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:02,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1481257174, now seen corresponding path program 1 times [2019-10-15 03:32:02,298 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:02,299 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066755824] [2019-10-15 03:32:02,299 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:02,299 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:02,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:02,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:02,475 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-10-15 03:32:02,475 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066755824] [2019-10-15 03:32:02,476 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500474438] [2019-10-15 03:32:02,476 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 [2019-10-15 03:32:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:02,611 INFO L256 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:32:02,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-15 03:32:02,641 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:02,821 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-15 03:32:02,821 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:32:02,821 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-15 03:32:02,822 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612550973] [2019-10-15 03:32:02,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:02,824 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:02,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:02,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:32:02,824 INFO L87 Difference]: Start difference. First operand 443 states and 568 transitions. Second operand 4 states. [2019-10-15 03:32:03,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:03,045 INFO L93 Difference]: Finished difference Result 1276 states and 1742 transitions. [2019-10-15 03:32:03,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:03,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 142 [2019-10-15 03:32:03,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:03,054 INFO L225 Difference]: With dead ends: 1276 [2019-10-15 03:32:03,054 INFO L226 Difference]: Without dead ends: 849 [2019-10-15 03:32:03,057 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:32:03,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2019-10-15 03:32:03,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 835. [2019-10-15 03:32:03,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 835 states. [2019-10-15 03:32:03,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1057 transitions. [2019-10-15 03:32:03,118 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1057 transitions. Word has length 142 [2019-10-15 03:32:03,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:03,119 INFO L462 AbstractCegarLoop]: Abstraction has 835 states and 1057 transitions. [2019-10-15 03:32:03,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:03,119 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1057 transitions. [2019-10-15 03:32:03,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-15 03:32:03,133 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:03,133 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:03,344 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:03,345 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:03,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:03,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1555232879, now seen corresponding path program 1 times [2019-10-15 03:32:03,347 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:03,347 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239632308] [2019-10-15 03:32:03,348 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:03,348 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:03,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:03,588 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-15 03:32:03,588 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239632308] [2019-10-15 03:32:03,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805745892] [2019-10-15 03:32:03,589 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 [2019-10-15 03:32:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:03,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:32:03,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-15 03:32:03,804 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:03,972 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-15 03:32:03,973 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:32:03,973 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [8] total 10 [2019-10-15 03:32:03,973 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753231470] [2019-10-15 03:32:03,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:03,975 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:03,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:03,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:32:03,977 INFO L87 Difference]: Start difference. First operand 835 states and 1057 transitions. Second operand 4 states. [2019-10-15 03:32:04,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:04,201 INFO L93 Difference]: Finished difference Result 1465 states and 1845 transitions. [2019-10-15 03:32:04,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:04,201 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 156 [2019-10-15 03:32:04,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:04,208 INFO L225 Difference]: With dead ends: 1465 [2019-10-15 03:32:04,208 INFO L226 Difference]: Without dead ends: 1049 [2019-10-15 03:32:04,210 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 305 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:32:04,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2019-10-15 03:32:04,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 1049. [2019-10-15 03:32:04,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1049 states. [2019-10-15 03:32:04,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1275 transitions. [2019-10-15 03:32:04,275 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1275 transitions. Word has length 156 [2019-10-15 03:32:04,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:04,276 INFO L462 AbstractCegarLoop]: Abstraction has 1049 states and 1275 transitions. [2019-10-15 03:32:04,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:04,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1275 transitions. [2019-10-15 03:32:04,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-10-15 03:32:04,283 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:04,284 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] [2019-10-15 03:32:04,493 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:04,494 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:04,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:04,494 INFO L82 PathProgramCache]: Analyzing trace with hash 649083913, now seen corresponding path program 1 times [2019-10-15 03:32:04,494 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:04,495 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846233611] [2019-10-15 03:32:04,495 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:04,495 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:04,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:04,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:04,631 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 42 proven. 23 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-15 03:32:04,632 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846233611] [2019-10-15 03:32:04,632 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407984870] [2019-10-15 03:32:04,632 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 [2019-10-15 03:32:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:04,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-15 03:32:04,844 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:04,969 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-15 03:32:04,969 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:05,264 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 43 proven. 6 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2019-10-15 03:32:05,265 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:32:05,265 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 4] total 12 [2019-10-15 03:32:05,265 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003727789] [2019-10-15 03:32:05,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 03:32:05,266 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:05,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 03:32:05,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2019-10-15 03:32:05,267 INFO L87 Difference]: Start difference. First operand 1049 states and 1275 transitions. Second operand 6 states. [2019-10-15 03:32:05,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:05,727 INFO L93 Difference]: Finished difference Result 1698 states and 2107 transitions. [2019-10-15 03:32:05,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 03:32:05,728 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 216 [2019-10-15 03:32:05,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:05,735 INFO L225 Difference]: With dead ends: 1698 [2019-10-15 03:32:05,735 INFO L226 Difference]: Without dead ends: 1163 [2019-10-15 03:32:05,738 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 434 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2019-10-15 03:32:05,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2019-10-15 03:32:05,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1163. [2019-10-15 03:32:05,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1163 states. [2019-10-15 03:32:05,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1377 transitions. [2019-10-15 03:32:05,802 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1377 transitions. Word has length 216 [2019-10-15 03:32:05,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:05,803 INFO L462 AbstractCegarLoop]: Abstraction has 1163 states and 1377 transitions. [2019-10-15 03:32:05,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 03:32:05,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1377 transitions. [2019-10-15 03:32:05,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-10-15 03:32:05,808 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:05,809 INFO L380 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:06,014 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:06,015 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:06,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:06,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1682498760, now seen corresponding path program 1 times [2019-10-15 03:32:06,016 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:06,016 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117201884] [2019-10-15 03:32:06,017 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:06,017 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:06,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:06,116 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-10-15 03:32:06,116 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117201884] [2019-10-15 03:32:06,117 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633275166] [2019-10-15 03:32:06,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:06,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:06,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:32:06,376 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-15 03:32:06,509 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-10-15 03:32:06,780 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:32:06,780 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 4 [2019-10-15 03:32:06,781 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607078585] [2019-10-15 03:32:06,781 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:32:06,782 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:06,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:32:06,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:06,782 INFO L87 Difference]: Start difference. First operand 1163 states and 1377 transitions. Second operand 3 states. [2019-10-15 03:32:06,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:06,875 INFO L93 Difference]: Finished difference Result 1765 states and 2154 transitions. [2019-10-15 03:32:06,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:32:06,876 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2019-10-15 03:32:06,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:06,886 INFO L225 Difference]: With dead ends: 1765 [2019-10-15 03:32:06,886 INFO L226 Difference]: Without dead ends: 1169 [2019-10-15 03:32:06,892 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:06,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2019-10-15 03:32:06,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1155. [2019-10-15 03:32:06,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1155 states. [2019-10-15 03:32:06,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 1343 transitions. [2019-10-15 03:32:06,998 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 1343 transitions. Word has length 216 [2019-10-15 03:32:06,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:06,999 INFO L462 AbstractCegarLoop]: Abstraction has 1155 states and 1343 transitions. [2019-10-15 03:32:06,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:32:06,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 1343 transitions. [2019-10-15 03:32:07,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-10-15 03:32:07,011 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:07,011 INFO L380 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:07,217 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:07,218 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:07,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:07,218 INFO L82 PathProgramCache]: Analyzing trace with hash 946266268, now seen corresponding path program 1 times [2019-10-15 03:32:07,218 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:07,219 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953817210] [2019-10-15 03:32:07,219 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:07,219 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:07,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 42 proven. 23 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2019-10-15 03:32:07,406 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953817210] [2019-10-15 03:32:07,407 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108010417] [2019-10-15 03:32:07,407 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 [2019-10-15 03:32:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:07,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-15 03:32:07,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:07,714 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 117 proven. 4 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-15 03:32:07,714 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:07,913 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:32:08,006 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:32:08,007 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:32:08,021 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:32:08,086 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2019-10-15 03:32:08,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1313129337] [2019-10-15 03:32:08,122 INFO L162 IcfgInterpreter]: Started Sifa with 103 locations of interest [2019-10-15 03:32:08,122 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:32:08,128 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:32:08,135 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:32:08,136 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:32:08,391 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 03:32:08,433 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 83 for LOIs [2019-10-15 03:32:08,968 INFO L199 IcfgInterpreter]: Interpreting procedure init_model with input of size 53 for LOIs [2019-10-15 03:32:09,035 INFO L199 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 94 for LOIs [2019-10-15 03:32:11,451 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-10-15 03:32:11,461 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-10-15 03:32:12,385 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-10-15 03:32:12,391 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6